Invasive Indo-Pacific lionfish (Pterois volitans) have rapidly expanded in the Western Atlantic over the past decade and have had a significant negative impact on reef fish biodiversity, habitat, and community structure, with lionfish out-competing native predators for resources. In an effort to reduce this population explosion, lionfish have been promoted for human consumption in the greater Caribbean region. This study examined whether the geographical expansion of the lionfish into a known ciguatera-endemic region can pose a human health threat for ciguatera fish poisoning (CFP). More than 180 lionfish were collected from waters surrounding the US Virgin Islands throughout 2010 and 2011. Ciguatoxin testing included an in vitro neuroblastoma cytotoxicity assay for composite toxicity assessment of sodium-channel toxins combined with confirmatory liquid chromatography tandem mass spectrometry. A 12% prevalence rate of ciguatoxic lionfish exceeding the FDA guidance level of 0.1 µg/kg C-CTX-1 equivalents

TY - JOUR. T1 - The impact of the invasive alien plant, impatiens glandulifera, on pollen transfer networks. AU - Emer, Carine. AU - Vaughan, Ian P.. AU - Hiscock, Simon. AU - Memmott, Jane. PY - 2015/12/3. Y1 - 2015/12/3. N2 - Biological invasions are a threat to the maintenance of ecological processes, including pollination. Plant-flower visitor networks are traditionally used as a surrogated for pollination at the community level, despite they do not represent the pollination process, which takes place at the stigma of plants where pollen grains are deposited. Here we investigated whether the invasion of the alien plant Impatiens glandulifera (Balsaminaceae) affects pollen transfer at the community level. We asked whether more alien pollen is deposited on the stigmas of plants on invaded sites, whether deposition is affected by stigma type (dry, semidry and wet) and whether the invasion of I. glandulifera changes the structure of the resulting pollen transfer networks. We sampled stigmas of ...

Invasive Species What do the terms introduced species , alien species , and invasive species mean? Lake Ballinger Invasive Plants. - Aquatic Invasive Species of the Thompson / Shuswap Region What we will cover.. Overview of invasive fish species Impacts of invasive species Distribution of ... , PowerPoint PPT presentation , free to view, - Invasive Species in Oregon Creating Effective Policy Coordination, Prevention, Education, and Collaboration May 5, 2010 Lisa A. DeBruyckere, OISC Coordinator, - Title: Invasive Species Definition Author: Roger C. A Last modified by: rcander Created Date: 4/9/2003 2:16:52 PM Document presentation format: On-screen Show. Viruses, like the West Nile Virus, can be transmitted by non-native species… Non-native, invasive plant species are a problem and have the potential to wreak havoc on our natural biotic communities. - Zebra Mussel (Dreissena polymorpha) Invasive Species A PowerPoint Project for General Biology Defining terms Native species. Invasive species in ...

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Author Summary The Asian tiger mosquito, Aedes albopictus, is a highly invasive mosquito and has spread from South East Asia to Europe, the United States and northern areas of Asia in the past 30 years. Aedes mosquitoes transmit a range of viral diseases, including dengue and chikungunya. Aedes albopictus is generally considered to be somewhat less of a concern in this regard than Aedes aegypti. However a recent mutation in the chikungunya virus dramatically increased its transmission by Aedes albopictus, causing an important outbreak in the Indian Ocean in 2006 that eventually reached Italy in 2007. This highlights the potential importance of this mosquito, which can thrive much further from the Equator than can Aedes aegypti. This paper describes the first genetic engineering of the Asian tiger mosquito. This is an essential step towards the development of genetics-based control methods against this mosquito, and also an invaluable tool for basic research. We describe both transposon-based and site

This is the mouth parts of the aquatic third-stage larva of an Asian tiger mosquito, newed behin a microscope. Its been magnified 800 times. The asian tiger

Aims Although biological invasions occur throughout the world, and some invaders are widespread in many habitats, few studies on the ecological impact of invaders have examined multiple sites. We tested how the impact of three widespread plant invaders changed depending on the identity of the species and the invaded island. We also tested whether relative species loss was lower in species-rich communities than in species-poor ones. Location We conducted floristic surveys and soil analyses in eight Mediterranean Basin islands: Crete and Lesbos (Greece), Sardinia (Italy), Corsica, Bagaud and Porquerolles (France), and Mallorca and Menorca (Spain). Methods We compared native species richness and diversity, proportion of life forms, soil percentage nitrogen, percentage organic carbon, C/N, and soil pH in nearby paired plots of 2 × 2 m: one control and one invaded by either the deciduous tree Ailanthus altissima, the succulent subshrubs Carpobrotus spp. or the annual geophyte Oxalis pes-caprae, ...

An Introduced or Alien species means a species, subspecies, or lower taxon occurring outside of its natural range (past or present) and dispersal potential (i.e. outside the range it occupies naturally or could not occupy without direct or indirect introduction or care by humans) and includes any part, gametes or propagule of such species that might survive and subsequently reproduce. An Invasive Alien Species is an alien species which becomes established in natural or semi-natural ecosystems or habitat, is an agent of change, and threatens native biological diversity. In GRIIS, species are recorded as having an impact (as yes under isInvasive) if there is evidence of the species negatively impacting biodiversity, and including species that are widespread, spreading rapidly or present in high abundance (Pagad et al. 2018). This usage is relevant to the purpose of GRIIS, and consistent with the concept of impact as formulated by Parker et al. (1999) and now widely used (e.g. Didham et al. ...

The Asian tiger mosquito, Aedes albopictus, is a highly successful invasive species that transmits a number of human viral diseases, including dengue and Chikungunya fevers. This species has a large genome with significant population-based size variation. The complete genome sequence was determined for the Foshan strain, an established laboratory colony derived from wild mosquitoes from southeastern China, a region within the historical range of the origin of the species. The genome comprises 1,967 Mb, the largest mosquito genome sequenced to date, and its size results principally from an abundance of repetitive DNA classes. In addition, expansions of the numbers of members in gene families involved in insecticide-resistance mechanisms, diapause, sex determination, immunity, and olfaction also contribute to the larger size. Portions of integrated flavivirus-like genomes support a shared evolutionary history of association of these viruses with their vector. The large genome repertory may ...

The Asian tiger mosquito is an invasive mosquito species that is known to be a vector for a wide range of mosquito-borne illness and disease. Learn more on our blog.

Download and buy this stock image: Female of the Asian Tiger Mosquito Aedes albopictus biting on human skin and bloodfeeding to... - L95-1631456 from age fotostocks photo library of over 50+ million high resolution stock photos, stock pictures, videos and stock vectors

Oxitec has achieved a world first by transforming the Asian tiger mosquito (Aedes albopictus), an important vector of the viral disease chikungunya. Oxitec

CITY NEWS SERVICE. EL MONTE - An aggressive species of mosquito responsible for outbreaks of dengue virus in Florida, Hawaii and Texas has been found in El Monte, officials said Tuesday.. Asian tiger mosquitoes are aggressive biters and active during daylight hours, as well as at dusk and dawn, according to the San Gabriel Valley Mosquito and Vector Control District, the agency responsible for mosquito control in the area.. Our goal is to eradicate this population, said Kenn Fujioka, the districts assistant manager. We definitely do not want this mosquito to become established in our communities.. The black-and-white striped insect, about a quarter-inch long, is a native of tropical and subtropical Southeast Asia and has not been seen in the San Gabriel Valley since 2001, when they were accidentally imported in shipments of plants called Lucky Bamboo.. The pest can transmit many serious diseases, including dengue fever, yellow fever; chikungunya, which is similar to dengue fever; ...

Oxitec scientists have reported the creation of a new flightless strain of the Asian tiger mosquito, Aedes albopictus. The breakthrough, reported in the jo

A new mosquito species, know as Asian tiger mosquitoes, is invading the Northeast region of the United States. They are joined by ticks, cicadas and other mosquitoes.

Experts say an extremely aggressive and an obnoxious breed of mosquitoes called the Asian Tiger Mosquito is going to swarm New Jersey.

In a new study, scientists from around the world - including a professor at the University of Rhode Island - warn that the threats posed by invasive alien species are increasing.

Invasive alien species are a major threat to native insular species. Eradicating invasive mammals from islands is a feasible and proven approach to prevent biodiversity loss. We developed a conceptual framework to identify globally important islands for invasive mammal eradications to prevent imminent extinctions of highly threatened species using biogeographic and technical factors, plus a novel approach to consider socio-political feasibility. We applied this framework using a comprehensive dataset describing the distribution of 1,184 highly threatened native vertebrate species (i.e. those listed as Critically Endangered or Endangered on the IUCN Red List) and 184 non-native mammals on 1,279 islands worldwide. Based on extinction risk, irreplaceability, severity of impact from invasive species, and technical feasibility of eradication, we identified and ranked 292 of the most important islands where eradicating invasive mammals would benefit highly threatened vertebrates. When socio-political ...

Of all the diverse insects, mites and diseases affecting the coconut palm, only some emerge as threats due to their invasive and injurious nature. Endemic organisms emerge as threats due to factors such as climate change, evolution of pesticide resistance as well as virulence matching host resistance. Generally, these threats are mostly short- medium-term since the respective countries have devised their own management practices over time. Movement of alien invasive species across national borders is a potential global threat to humans, agricultural production, indigenous ecosystem, and animal and plant health and gaining more and more attention in view of increasing travel and trade among countries To protect the coconut industry coconut growing countries worldwide must share the responsibility of finding solutions to cope with the risks and impact of emerging plant pests and diseases, particularly the introduction of invasive alien species.. Many countries affected by threatening pests and ...

All data sets are licensed under a Creative Commons Attribution 4.0 International License (CC BY 4). Per the CC BY 4 license it is understood that any use of the data set will properly acknowledge the individual(s) listed above using the suggested data citation. If you wish to use this data set, it is highly recommended that you contact the original principal investigator(s) (PI). Should the relevant PI be unavailable, please contact BCO-DMO ([email protected]) for additional guidance. For general guidance please see the BCO-DMO Terms of Use document ...

The Anthropocene Epoch is characterized by novel and increasingly complex dependencies between the environment and human civilization, with many challenges of biodiversity management emerging as wicked problems. Problems arising from the management of biological invasions can be either tame (with simple or obvious solutions) or wicked, where difficulty in appropriately defining the problem can make complete solutions impossible to find. We review four case studies that reflect the main goals in the management of biological invasions - prevention, eradication, and impact reduction - assessing the drivers and extent of wickedness in each. We find that a disconnect between the perception and reality of how wicked a problem is can profoundly influence the likelihood of successful management. For example, managing species introductions can be wicked, but shifting from species-focused to vector-focused risk management can greatly reduce the complexity, making it a tame problem. The scope and scale of the

Invasive plant and animal species can cause dramatic and enduring changes to the geography and ecology of landscapes, a study from Purdue University and the University of Kentucky shows.

Horizon scanning for invasive alien species with the potential to threaten biodiversity and human health on a Mediterranean island. / Peyton, Jodey; Martinou, Angeliki F.; Pescott, Oliver L.; Demetriou, Monica; Adriaens, Tim; Arianoutsou, Margarita; Bazos, Ioannis; Bean, Colin W.; Booy, Olaf; Botham, Marc; Britton, J. Robert; Lobon Cervia, Javier; Charilaou, Pantelis; Chartosia, Niki; Dean, Hannah J.; Delipetrou, Pinelopi; Dimitriou, Andreas C.; Dorflinger, Gerald; Fawcett, Jim; Fyttis, Georgios; Galanidis, Alexandros; Galil, Bella; Hadjikyriakou, Thomas; Hadjistylli, Margarita; Ieronymidou, Christina; Jimenez, Carlos; Karachle, Paraskevi; Kassinis, Nikos; Kerametsidis, George; Kirschel, Alexander N. G.; Kleitou, Periklis; Kleitou, Demetris; Manolaki, Paraskevi; Michailidis, Nikolas; Mountford, J. Owen; Nikolaou, Charis; Papatheodoulou, Athina; Payiatas, Giorgios; Ribeiro, Filipe; Rorke, Stephanie L.; Samuel, Yianna; Savvides, Pantelis; Schafer, Stefanie M.; Tarkan, Ali Serhan; Silva-Rocha, ...

The European Parliaments Agriculture Committee on January 23 voted on an action plan to save the bees. They called for a 50% increase in funding and better support for EU beekeepers, as well as a ban on harmful pesticides.. The Agriculture Committee has proposed workable and efficient solutions to combat honey adulteration, an inappropriate use of pesticides, bee diseases and invasive alien species. We want to boost support for our beekeepers and step up promotion of EU bee products, said rapporteur Norbert Erdős (EPP, HU).. The cornerstone of the text is the call to replace the current misleading label Blend of EU and non-EU honeys with a clear indication of the country or countries that the honey or honeys come from - including the percentages of different honeys used in the final product. This all will help to improve the currently bleak situation of our beekeepers, he added.. The draft resolution adopted by the committee on January 23 will now be put to a vote by Parliament as a ...

The astonishing success of the alien invasive harlequin ladybird in Britain has given a team of scientists a unique opportunity to investigate a key ecological theory - the Enemy Release Hypothesis.

Brown, P.M.J., Roy, H.E., Rothery, P., Roy, D.B., Ware, R.L. & Majerus, M.E.N. (2008) Harmonia axyridis in Great Britain: analysis of the spread and distribution of a non-native coccinellid. From Biological Control to Invasion: the Ladybird Harmonia axyridis as a Model Species From Biological Control to Invasion: the Ladybird Harmonia axyridis as a Model Species. (eds H.E. Roy), & Wajnberg, E.), pp. 55-67. Springer Netherlands ...

Brown, P.M.J., Roy, H.E., Rothery, P., Roy, D.B., Ware, R.L. & Majerus, M.E.N. (2008) Harmonia axyridis in Great Britain: analysis of the spread and distribution of a non-native coccinellid. From Biological Control to Invasion: the Ladybird Harmonia axyridis as a Model Species From Biological Control to Invasion: the Ladybird Harmonia axyridis as a Model Species. (eds H.E. Roy), & Wajnberg, E.), pp. 55-67. Springer Netherlands ...

Double click on images to enlarge. Harlequin Ladybird Harmonia axyridis f. conspicua, September 2017, rear garden, Staffordshire, England.

We assessed exotic species abundance and diversity after intensive weeding had ceased in a set of restored vernal pools in Southern California. We found that exotic species cover and richness increased, particularly around the edges of the pools. We hypothesize that this increase in exotics around the pools edges indicates encroachment of exotic grasses from the upland grassland into the pools. Further, we found that the ratio of total native cover to total exotic cover decreased around the pool edges. These findings indicate that the native communities in our studys restored vernal pools are not resistant to exotic invasion. One way that restoration projects may increase a vernal pools resistance to invasion is by employing an array of invasive species management techniques in addition to short-term weeding, such as bolstering the native seed bank and sourcing seed from competitive native ecotypes. ...

Several Australian Acacias have become invasive when introduced into new areas within Australia. These invasive Acacias may have a detrimental effect on native flora and induce changes to below-ground microbial composition. Previous studies have shown that the invasive success of Acacias can be at least partly attributed to their ability to associate with N-fixing rhizobial bacteria. This study assessed the role of rhizobia in the invasion success of four Acacia species (A. cyclops, A. longifolia, A. melanoxylon, A. saligna) and closely related species Paraserianthes lophantha in their nonnative environment within Australia. Presence or absence of rhizobia in soils in both the native and introduced ranges of each species, as well as infectivity and efficacy, were estimated using the Most Probable Number (MPN) method to determine numbers of rhizobial cells/g-1 of soil. A glasshouse experiment had shown that there are significant differences in aboveground biomass between plants grown in soils ...

With global warming effects - higher temperatures and the fast ice melting in the planet - there are more and more sensitive areas to the arrival of non-native invasive species. These phenomena are especially worrying in areas such as the Antarctic Peninsula, where environmental conditions could favor the survival of the potentially invasive species. The Antarctic Peninsula is the most vulnerable area to the episodes of biological invasions through drifting waters. The geographical latitude, and closeness to terrestrial areas - South America, Scotia Arch islands, etc. - with potentially invasive species, the position of the coasts regarding the Antarctic Circumpolar Current, and the climate conditions are factors that would favor the arrival and colonizing success of non-native species carried by algae or plastics, notes Àvila, head of the research projects Bluebio, Distantcom, Ecoquim and Actiquim, on the ecology of marine invertebrate communities in Antarctic waters.. The risk of invasion ...

NSW Department of Primary Industries (DPI) is undertaking re-snagging works to improve native fish habitat in the Lower Severn River.. The reintroduction of snags - part of a collaborative project between DPI Fisheries and the Northern Tablelands Local Land Services (LLS) - aims to boost habitat for small and large native fish, including some threatened species.. Recent mapping has identified a low number of snags in parts of the Severn River, said NSW DPI Fisheries Manager Charlie Carruthers.. Snags are fallen trees or boulders that are a major ecological and structural element of our waterways.. They increase in-stream habitat for native fish by providing hiding and resting places out of the main flow of the river as well as spawning sites for several species of native fish, including popular recreational species such as Murray Cod, he said.. Snags also play an important role in the food webs of our waterways with small aquatic animals such as shrimp feeding on the algae that grow on ...

Invasive plant species are one of the challenges that livestock producers in the South face in their pastures. The Chinese tallowtree [Triadica sebifera (L.) small] is an invasive, deciduous, upright tree that can reach up to 60 feet in height and 3 feet in diameter. This invasive species is also commonly known as the

Native Fish and Amphibians From Fish Stocking SACRAMENTO, Calif.- The Sacramento Superior Court has ordered the California Department of Fish and Game into talks with Pacific Rivers Council and the Center for Biological Diversity to develop interim measures to limit harm to native species caused by fish stocking. The intent is to minimize the adverse effect that hatchery-raised fish inflict on sensitive native fish and amphibian species while the Department prepares an Environmental Impact Report under the California Environmental Quality Act.. Interim measures limiting stocking are needed to help save Californias native fish and frogs from extinction, said Noah Greenwald, biodiversity program director for the Center for Biological Diversity. Fish and Game should still be able to stock hatchery fish, but in places where they wont harm native species.. The court ruled in May 2007 that fish stocking has significant environmental impacts on aquatic ecosystems and in particular, on native ...

Tree planting is the best action to take in order to mitigate deforestation and tree removal. However care must be taken not to unwittingly harm the environment. One may ask how is it possible to harm the environment by planting trees?. There are many non-Armenian tree species (non-native species), which are invasive and can aggressively occupy an area by crowding out and eventually replacing native, indigenous species of trees. Unfortunately, in Armenia, after the massive tree-cutting period of the early 1990s the planting of invasive species became a common practice, mostly due to lack of awareness of the ecological detriment that planting of invasive species can cause.. Below is a partial list of trees and shrubs which are growing in Armenia. We generally recommend planting only species that are labeled as native. Any species labeled invasive should never be planted and actually should be removed whenever possible. These invasive species have a particular ability to produce thousands and ...

The Goriška region and the town of Nova Gorica itself are a hotspot for reproduction and further spreading of many plant or animal non-native species. The reason for this are its transitional position and its mild climate. In recent years an invasive species known as the tiger mosquito (Aedes albopictus Skuse, 1894) has colonized this area. Here it successfully reproduces and maintains its population. In this paper we studied the seasonal dynamics of its reproduction from the appearance of first eggs until the development of the species larvae in various urban, suburban and forested locations. We studied the presence of tiger mosquito larvae in different surroundings and tried to determine its most suitable microhabitat. In order to acquire appropriate results we used ovitraps, which are commonly used to monitor mosquito larvae in their natural environment. At the end we examined the ratio between larvae of indigenous species and tiger mosquito larvae. The data were compared to shed light on ...

Domain architectures containing the following SCOP superfamilies _gap_,90257 in Linepithema humile v1.1. Domain architectures illustrate each occurrence of _gap_,90257.

The Aedes albopictus (Asian Tiger) mosquitoes which can transmit Zika, Chikungunya, and Dengue Fever viruses, have adapted very well to human habitats, by being able to lay eggs that survive long periods without water and that can hatch and grow into larvae after a rain shower in a container as small as a bottle cap. Differing greatly in habitat from the more familiar marsh mosquitos that thrive near marshes in tidal zones, the Asian Tiger mosquitos, with recognizable white striped legs, feeds during daylight hours when people are most likely to be outside, versus the marsh mosquitoes that primarily feed at dusk.. There are many things that families on the Eastern Shore of Virginia can do to protect themselves from mosquitos on their own property and in their community:. 1. Reduce mosquito breeding grounds by eliminating standing water on your property ...

D. Freshwater W, Hamner RM, Parham S, Wilbur AE. Molecular evidence that the lionfishes Pterois miles and Pterois volitans are distinct species. Journal of the North Carolina Academy of Science [Internet]. 2009 ;125(2):39-46. http://dc.lib.unc.edu/cdm/singleitem/collection/jncas/id/3939/rec/3 ...

D. Freshwater, W., Hamner, R. M., Parham, S., & Wilbur, A. E.. (2009). Molecular evidence that the lionfishes Pterois miles and Pterois volitans are distinct species. Journal of the North Carolina Academy of Science, 125(2), 39-46. Retrieved from http://dc.lib.unc.edu/cdm/singleitem/collection/jncas/id/3939/rec/3 ...

MosquitoMate will only release male mosquitoes. When these good mosquitoes mate with bad female Asian tiger mosquitoes in the wild, they produce eggs that wont hatch. Over time, populations of Asian tiger mosquitoes will begin to die off. This method of getting rid of disease-ridden mosquitoes has been tested extensively in Brazil ...

Abstract: Invasive plants frequently have competitive advantages over native species. These advantages have been characterized in systems in which the invading species has already become well established. Surprisingly, invader impacts on native communities currently undergoing invasion are lacking from most ecological studies. In this work we document and quantify shifting patterns in plant community structure in a native ecosystem (remnant tallgrass prairie) undergoing invasion by the invasive exotic Sorghum halepense (Johnsongrass). Further, we use manipulative field and greenhouse studies to quantify impacts of potential allelochemicals contained in whole-plant S. halepense leachates on growth of the dominant native grass, Schizachyrium scoparium (Little Bluestem), and tested the inhibitory effects of the potential soil legacy of S. halepense on the native grass in the greenhouse. Plant diversity indices revealed three distinct plant communities within the remnant prairie: a native community, ...

When exotic species spread over novel environments, their phenotype will depend on a combination of different processes, including phenotypic plasticity (PP), local adaptation (LA), environmental maternal effects (EME) and genetic drift (GD). Few attempts have been made to simultaneously address the importance of those processes in plant invasion. The present study uses the well-documented invasion history of Senecio inaequidens (Asteraceae) in southern France, where it was introduced at a single wool-processing site. It gradually invaded the Mediterranean coast and the Pyrenean Mountains, which have noticeably different climates. We used seeds from Pyrenean and Mediterranean populations, as well as populations from the first introduction area, to explore the phenotypic variation related to climatic variation. A reciprocal sowing experiment was performed with gardens under Mediterranean and Pyrenean climates. We analyzed climatic phenotypic variation in germination, growth, reproduction, leaf physiology

The SV3100 and SV5100 Skeeter Vac mosquito traps by Blue Rhino have been proven to be the best, most affective forms of mosquito control available on the

[The Global Register of Introduced and Invasive Species - Belgium is a species checklist published by the Invasive Species Specialist Group (ISSG). It contains information on 3,000+ validated non-native taxa in Belgium and serves as the national reference for the Global Register of Introduced and Invasive Species (GRIIS, Pagad et al. 2018). The checklist is created through an open and reproducible workflow developed for the TrIAS project (http://trias-project.be, see Methodology). It is published here as a standardized Darwin Core Archive and includes for each taxon: the scientific name, higher classification and stable taxon identifier, provided by the GBIF Backbone Taxonomy (in the taxon core) and related information in three extensions, provided by the source checklists (or the most trustworthy one in case of competing information). The related information consists of the year of first introduction and last assessment/observation in Belgium and where available its regions (given as a year range in

[The Global Register of Introduced and Invasive Species - Belgium is a species checklist published by the Invasive Species Specialist Group (ISSG). It contains information on 3,000+ validated non-native taxa in Belgium and serves as the national reference for the Global Register of Introduced and Invasive Species (GRIIS, Pagad et al. 2018). The checklist is created through an open and reproducible workflow developed for the TrIAS project (http://trias-project.be, see Methodology). It is published here as a standardized Darwin Core Archive and includes for each taxon: the scientific name, higher classification and stable taxon identifier, provided by the GBIF Backbone Taxonomy (in the taxon core) and related information in three extensions, provided by the source checklists (or the most trustworthy one in case of competing information). The related information consists of the year of first introduction and last assessment/observation in Belgium and where available its regions (given as a year range in

Get information, facts, and pictures about Invasive Species at Encyclopedia.com. Make research projects and school reports about Invasive Species easy with credible articles from our FREE, online encyclopedia and dictionary.

Abstract : European overseas territories are home to biodiversity and endemism of worldwide importance, vastly superior to that of continental Europe as a whole. They are, however, much more threatened by invasive species, including hundreds of alien invasive plant species having a huge impact on natural and agricultural habitats. As in continental Europe, invasive plants have only recently been recognized as a threat to the local environment and biodiversity. Mechanical and chemical control programmes - underway for several decades - have not been entirely successful for permanent, cost effective, environment-friendly management. Biological control of weeds has long been successfully used in other neighbouring countries with similar climates, environmental conditions and invasions, but has barely been implemented in European overseas territories. There have been very few attempts to set up cIassical biological control programmes in these regions - a few of the species that have been the focus ...

Rice is mainly produced in deltas, where paddy fields decrease the usual soil salinity in these areas.. In Ebro Delta, the Apple Snail pest is destroying the rice seedlings, damaging the rice production. Some of the methods used to control that invasive species are to flood the paddy fields with sea water and dry seeding. However, those methods increase the field salinity.. IRTA researcher Mar Català explains in this video how the Neurice project might help to solve that problem.. ...

Brown, P.M.J. & Roy, H.E. (2007) The spread of the Harlequin Ladybird Harmonia axyridis in late 2006. Atropos 31: 32-33.. Brown, P.M.J. (2007) In love with ladybirds. BBC Wildlife 25(7): 58-63.. Brown, P.M.J., Adriaens, T., Bathon, H., Cuppen, J., Goldarazena, A., Hagg, T., Kenis, M., Klausnitzer, B.E.M., Kovar, I., Loomans, A.J., Majerus, M.E.N., Nedved, O., Pedersen, J. Rabitsch, W., Roy, H.E., Ternois, V., Zakharov, I. & Roy, D.B. (2008) Harmonia axyridis in Europe: spread and distribution of a non-native coccinellid. BioControl 53: 5-22.. Brown, P.M.J., Roy, H.E. & Majerus, M.E.N. (2007) The spread of the harlequin ladybird in Cambridgeshire and Huntingdonshire. Nature in Cambridgeshire 49: 55-57.. Brown, P.M.J., Roy, H.E. and Majerus, M.E.N. (2006) Ladybird recording in Cambridgeshire and Huntingdonshire. Nature in Cambridgeshire 48: 12-16.. Brown, P.M.J., Roy, H.E. and Majerus, M.E.N. (2007) Update on the spread of an invasive ladybird. Biocontrol News and Information 28(1): 16-17.. Brown, ...

The Asian tiger mosquito or forest mosquito is native to the tropical and subtropical areas of Southeast Asia.. However in the past couple of decades this species has invaded many countries. Aedes albopictus is an epidemiologically important vector for the transmission of many viral pathogens, including the Yellow fever virus, dengue fever and Chikungunya fever, as well as several filarial nematodes such as Dirofilaria immitis.. ...

The Centers for Disease Control and Prevention (CDC) reports that the chikungunya virus has not reached the U.S., but there were confirmed cases on the Caribbean Island of St. Martin in December 2013. At the time of publication, at least three travelers from the U.S. to the Caribbean have contracted the chikungunya virus. It wont be long before the Asian tiger mosquito makes its way onto U.S. soil. The CDC states that other mosquitoes that can spread the chikungunya virus and dengue are in the United States. These mosquitoes include Aedes aegypti and Aedes albopictus. Entomologists have found the species as far south as Floridas Gulf Coast and as far north and west as Chicago, Illinois.. ...

Pueraria montana var. lobata, is a perennial climbing vine known for its rapid and competitive growth. Introduced to North America and promoted at various times as a crop, an ornamental, and an erosion prevention tool, its negative impacts have been varied and severe in the United States. Dense populations overtop and smother crops and native vegetation, alter nitrogen cycles, and have the potential to affect air quality. Kudzu is winter-deciduous in North America with stems re-growing each season. In Canada, growth occurs from May until September, long enough for production of viable seed. Although widely believed to be intolerant of winter temperatures typical in eastern Canada, underground structures may be able to withstand temperatures as low as −30°C, and northward range expansion is predicted by climate change models. Dispersal in North America is primarily through intentional planting by humans, with clonal propagation and limited seed production and germination contributing to local ...

Poster (2012, May 22). The multicoloured Asian ladybird Harmonia axyridis Pallas (Coleoptera: Coccinellidae), previously introduced as a biological control agent to control aphids populations, is now frequently considered as an ... [more ▼]. The multicoloured Asian ladybird Harmonia axyridis Pallas (Coleoptera: Coccinellidae), previously introduced as a biological control agent to control aphids populations, is now frequently considered as an intraguild predator, consuming other aphids natural enemies. The interactions between this exotic ladybird and other aphidophagous species present in Belgian agro-ecosystems are mainly asymmetric in support of H. axyridis. An aphidophages sampling has been performed between 2009 and 2011 in four agrosystems such as broad bean, wheat, corn and potato. The sampling method consisted in the counting of aphids and all developmental stages of aphidophages present in quadrats of 1m² from April to September. Harmonia axyridis, the invasive coccinellid, was ...

The Argentine ant, Linepithema humile, is a widespread invasive ant species that has successfully established in nearly all continents across the globe. Argentine ants are characterised by a social structure known as unicoloniality, where territorial boundaries between nests are absent and intraspecific aggression is rare. This is particularly pronounced in introduced populations and results in the formation of large and spatially expansive supercolonies. Although it is amongst the most well studied of invasive ants, very little work has been done on this ant in South Africa. In this first study, we investigate the population structure of Argentine ants in South Africa. We use behavioural (aggression tests) and chemical (CHC) approaches to investigate the population structure of Argentine ants within the Western Cape, identify the number of supercolonies and infer number of introductions. Both the aggression assays and chemical data revealed that the Western Cape Argentine ant population can be divided

Invasive Plants in Georgetown. By Dave Polito. An invasive species is defined as a species that is (1) non-native or alien to the ecosystem under consideration and (2) whose introduction causes or is likely to cause economic or environmental harm, or harm to human health.. A few of the more well-known invasive species in the US are kudzu vines and asian carp in the South and Mississippi and zebra mussels in the Great Lakes. Here in Georgetown many of you are already aware of the European green crab, which is decimating clam populations; the woolly adelgid, which is rapidly killing our eastern hemlock trees; and the brown-tailed moth causing oak and fruit tree defoliation, along with skin and lung irritations among humans.. Some invasive species can be practically controlled; others are nearly impossible to stop. I would like to focus on several plant species invasive to Georgetown which CAN be controlled, but which, if not controlled, can have devastating effects on our properties.. The first ...

Pollinators and pollination services are under threat globally, and invasive plants have been implicated in their decline. Results of previous studies suggest that consequences of invasion for pollinators and plant-pollinator interactions are context specific. Investigating factors such as the density of an invasive plant and its phenology may provide a nuanced understanding of invasive species impacts. We conducted a 2-yr study in Montana to investigate how local pollinator abundance, richness, community composition, and visitation patterns varied with invasive Centaura stoebe density and phenology, and whether C. stoebe altered the reproduction of a co-flowering native plant, Heterotheca villosa, through changes in pollinator visitation. In an observational study, we found that during its peak bloom in August, Centaurea stoebe provided abundant floral resources to late-season pollinators. However, prior to C. stoebe bloom, native floral density and pollinator abundance and richness of these ...

Biological invasion is regarded as one of the greatest environmental problems facilitated by globalization. Some hypotheses about the invasive mechanisms of alien invasive plants consider the plant-herbivore interaction and the role of plant defense in this interaction. For example, the

The larval stage of the harlequin ladybird (Harmonia axyridis) resting on a nettle leaf on a mid summer evening surrounded by the remains of previous meals. This is an invasive species from asia which is thought to compete with the native species of ladybirds for food. Photographed in Somerset UK in July - Stock Image C029/1774

From the modern revision of the genus by Alex Wild (2007): In subtropical South America, Linepithema ants are found near sea level in rainforests, scrub forests, and floodplains. In the Central Andes they ascend to 4,000 meters elevation. In northern South America, Central America, and the Caribbean Linepithema species are more typically montane, sometimes occurring locally at high densities to the apparent exclusion of other ant species. Two species, Linepithema humile and the Argentine ant Linepithema iniquum, have been carried around the world with human commerce, although L. iniquum seems to establish only in greenhouses (Wheeler 1929, Creighton 1950). Although Linepithema ants are often observed in undisturbed primary habitat, most species may also readily be found in pastures, lawns, roadsides and other disturbed habitats, suggesting that populations weather deforestation and habitat modification reasonably well. Some species, including the notorious Argentine ant, likely thrive with ...

Similar species: Canada thistle is distinguished from all other thistles by creeping lateral roots, dense clonal growth; and small dioecious flower heads (meaning male and female flowers are produced on ⠦ C. thistle invading a ⠦ Seeds can separate from the white tufts. 1. An aggressive, spreading root system. REC, Glyphosate (Roundup®) Information and Alternatives for Weed Management, Plant Invaders of Mid-Atlantic Natural Areas, Weeds Gone Wild: Alien Plant Invaders of Natural Areas. It is difficult to control because its extensive root system allows it to recover from control attempts. Canada thistle stands erect to 3-1/3 ⠦ Externally, Canada thistle ⠦ Seeds ⠦ Check the location weekly and snip off any new growth that you may see. Canada thistle. 3. Canada thistle is a native of southeastern Eurasia that immigrated to North America in the early 1700s, probably as a contaminant of crop seed. Seedlings have poorly developed rosettes. Canada thistle (Cirsium arvense (L.) ...

Harlequin ladybird larva (Harmonia axyridis). This is an invasive species in the UK. Photographed in Derbyshire, UK, in September. - Stock Image C021/5807

EMAPI 2017 - Registration Open!The EMAPI 2017 - International Conference on Ecology and Management of Alien Plant Invasions - will take place in Lisbon, Portugal, September 4th-8th, 2017, organized by cE3c - Centre for Ecology, Evolution and Environmental Changes.

Such a high economic cost drives many attempts to find a solution; while dengue vaccines are being developed, most countries focus on vector control. This involves studying the biology and physiology of the vector, in this case, Ae. albopictus, in the hopes of understanding ways to control or limit the spread of the vector, and hence, any associated zoonotic diseases. In Singapore, many studies 49 43 45 50 have been funded to understand Ae. albopictus. This increased understanding of the various mosquito vectors in our environment in turn enables better policy-making, to better combat this public health issue. However, this is not a process that is close to completion. New emerging infectious diseases are always on the horizon; zika virus (ZIKV) is one of these potential new arboviruses 51 . While zika virus is usually spread by Ae. aegypti, Ae. albopictus has recently been proven to have potential to spread ZIKV 51 . Dengue control plans already in place in Singapore may mitigate the threat of ...

Such a high economic cost drives many attempts to find a solution; while dengue vaccines are being developed, most countries focus on vector control. This involves studying the biology and physiology of the vector, in this case, Ae. albopictus, in the hopes of understanding ways to control or limit the spread of the vector, and hence, any associated zoonotic diseases. In Singapore, many studies 49 43 45 50 have been funded to understand Ae. albopictus. This increased understanding of the various mosquito vectors in our environment in turn enables better policy-making, to better combat this public health issue. However, this is not a process that is close to completion. New emerging infectious diseases are always on the horizon; zika virus (ZIKV) is one of these potential new arboviruses 51 . While zika virus is usually spread by Ae. aegypti, Ae. albopictus has recently been proven to have potential to spread ZIKV 51 . Dengue control plans already in place in Singapore may mitigate the threat of ...

Many invasive plants were introduced from Europe and Asia either accidentally or intentionally, often for food, medicinal or horticultural values. Purple loosestrife, an invasive wetland plant, was planted in the 1920s to beautify wetlands. Non-native insect species like the emerald ash borer were first found in Michigan in 2002 and it is thought they were accidentally introduced in wood shipping crates coming from Asia.. Invasive plants can become established in many types of habitats but, in general, they are more likely to invade ecosystems that have been disturbed by human activity. Some invasive plants also produce allelopathic substances, chemicals released through roots, fruits or leaves that inhibit or prevent the growth and establishment of native plants.. Invasive plants are problems in both urban and rural areas worldwide.. The United States Department of Agriculture estimates that invasive species (both plant and animal) cause $130 billion dollars annually in losses to agriculture, ...

Why should we be concerned about the Harlequin?. The Harlequin Ladybird Harmonia axaridis is an invasive ladybird originating in Asia. It arrived in the UK in the summer of 2004 and is now found in all parts of England with a few isolated locations in Scotland. It was introduced into North America in 1988 and is now a serious insect pest. It has subsequently invaded much of north-western Europe and arrived in County Down in 2009. It was first reported in Counties Cork and Wicklow in 2010 and Carlow in 2011. The Harlequin causes problems in the natural environment in that it has a wide dietary range, out-competing native ladybirds for their main prey of aphids and even consuming other ladybird species eggs and larvae. They can reproduce up to three generations per year whilst most other native ladybird species will only reproduce once. They are a serious threat to our native species and it is important that we monitor their arrival and impact.. Download the Harlequin Ladybird Variation ...

Arizona Invasive Species Advisory Council Arizonas Invasive Species - unwanted plants and animals June 30, 2006 A Report to the Governor Arizona Invasive Species Advisory Council Director Arizona Game and Fish Department Duane Shroufe (Co-chair) Director Arizona Department of Agriculture Donald Butler (Co-chair) Policy Advisor for Natural Resources Office of the Governor Lori Faeth Arizona Game and Fish Department Fisheries Branch Chief (representative for Director Duane Shroufe) Arizona State University - Polytechnic Academic Community Larry Riley Arizona Department of Agriculture Associate Director (representative for Director Don Butler) Arizona Department of Transportation John Caravetta Dr. John Henry Brock Arizona-Sonora Desert Museum Conservation Community Dr. Richard Brusca Bruce Eilerts (representative for Director Victor Mendez and Deputy Director David Jankofsky) Earth Care For all thats Green, Inc. Nursery and Landscape Industry Glenn Fahringer Arizona Crop Protection Association ...

Recognizable by its black and white stripes and small size, the tiger mosquito (Aedes albopictus) has been gaining ground in the territory for several years now

PROJECT COMPLETED. The Science Issue and Relevance: Florida is famous for its large number of artesian springs and spring-fed rivers of intrinsic natural allure and beauty. These unique ecosystems have significant cultural, recreational, and ecological value. Increasingly, there is widespread impairment of Floridas springs and spring-fed rivers resulting from land-use changes and increased demand for groundwater resources as the human population of Florida expands. Many springs have experienced substantially decreased discharge in recent years, and nutrients (principally nitrate) and other groundwater contaminants contribute to extensive eutrophication, algal blooms, and greatly diminished water quality. Furthermore, non-native aquatic invasive species are becoming increasingly prevalent in many of Floridas springs and rivers. Impairment of these fragile ecosystems has shifted them away from historical conditions and threatens their long-term ecological integrity. WARC investigators ...

Invasive species are widely recognized as a major threat to marine biodiversity. This important book synthesizes current information about invasive seaweeds and human responses to them, and considers seaweed invasions in the context of broader thinking about invasion ecology. This includes addressing legal frameworks for regulatory control, practical means to track and respond to invasive seaweeds in the field, as well as the ecology of invasions. The result is both a valuable multidisciplinary synthesis of work to date, and a pointer to future challenges and priorities. ...

Mosquito Squad is armed and ready to fight the bite of the Tiger Mosquito and the other 50 species of mosquitoes that make life miserable for St. Louisans! Read how on our blog.

Invasive exotic species are a significant threat to ecosystems across the globe and pose a monumental challenge for resource managers. The mechanisms by which these species impact ecosystems are imperfectly understood and science is still without a unified theory to explain how these species usurp habitat space, displacing natives. Invasive species dominance may be partially explained by escape from pathogens that suppress native plants, or disruption of native mutualisms. A relatively unstudied aspect is the relationship between invasive species and microorganisms inhabiting soil. Lonicera maackii is a model invasive species that impacts forests in the Miami Valley of southwestern Ohio. In this study we will focus specifically on colonization of roots by the microbial community and potential feedbacks to plant growth. The microbial community on L. maackii roots will be compared to that of native species using a metabolic profiling technique.

The Group One site we visited was a shelterwood cut to create early seral habitat (brush, young vegetation) on a steep mountain slope above Ulysses Creek. The logging happened sometime between 2010 and 2013 on a forest that was about 110 years old. The harvest methods used on the Ulysses Creek site are essentially identical to whats now proposed for nearly 3,200 acres of the South Redbird project. Spreading from the temporary roads bulldozed across the slope, infestations of invasive species are proliferating. Kudzu, autumn olive, Japanese stiltgrass, multiflora rose, Japanese honeysuckle, and sericea lespedeza are all well-established and expanding. Many of the trees left standing have been badly damaged from poor felling or skidding practices, and tree roots are tore up from dozers. Logging on 50 percent slopes caused a loss of soil duff and the exposure of mineral soil. Its really bad, and bad throughout. The stand that we looked at was 34 acres. The amount proposed for logging in the ...

Restoration projects to remove invasive plants free up needed space and resources for native plants and birds to thrive in a sustainable habitat. Native plants and native wildlife have a symbiotic relationship, where native birds serve as an indicator of healthy native habitats. For example, Least Bells Vireo- a federally endangered bird - nests in dense brush areas of native mule fat or native coyote brush. By restoring the ecological health of the area, we are contributing to the breeding success of this bird and others - birds that live in the area year-round as well as those migrating in both the spring and fall. There are many different non-native and invasive plants at the Basin that have posed issues to native wildlife year in and out. Annual non-native mustards-like shortpod mustard (Hirschfeldia incana) and black mustard (Brassica nigra) can grow to 6′ tall and create a dense, almost impenetrable thicket. This layer of biomass hides the invasive horehound (Marrubium vulgare). The ...

a more detailed description of these impacts can be found here]. During their long stay in freshwater it is presumed that the mitten crabs have an ecological effect. Although studies are underway in San Francisco Bay (Halat and Resh 1996), no ecological impacts have been reported. There are undoubtedly many ecological interactions that are not yet understood about the mitten crab, including how they might compete within or shift the trophic systems in different habitats. Vitousek (1990) suggests that invasive species can change their new ecosystems if they 1) differ substantially from indigenous species in resource acquisition or utilization; 2) alter the trophic structure of the invaded area; or 3) alter the disturbance frequency and/or intensity of disturbance.. Using San Francisco Bay as an example we have attempted to outline potential trophic level impacts [Figure 2c] [Figure 2d] of mitten crabs as zoeae and juveniles. However, it is important to note that inference of ecological impacts in ...

Read Genetic diversity of invasive populations of the florida crab (Rhithropanopeus harrisii (Gould, 1841): (Decapoda, Panopidae)), Russian Journal of Genetics on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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You may be able to observe some of the effects of climate change wherever you garden or enjoy the green world. I have. One example: in fall/winter 2009, we had no snow until December 9 in the Adirondack foothills of upstate New York, where Ive gardened for 22 years. In at least 20 of those years, snow began in October or early November, often not melting until May. So which plants profited from this seasons reprieve from the bitter winter to come? Perennial weeds: red clover, bird vetch, oxeye daisy - all aliens. Untouched by the hard frosts that killed off everything else, they got a head start for spring, remaining green - and photosynthesizing - as much as two months longer than the natives they compete with in the flowerbed. And though the late snowfall gave me a larger window for pulling weeds, I couldnt get them all.. In North Americas magnificent natural areas where native plants are a national treasure, experts face a much more daunting challenge from invasive aliens than we do in ...

The research project will assess the potential for DNA barcoding to detect aquatic invasive plant species Aquatic species are particularly difficult to identify, but DNA barcoding has shown promise for detecting aquatic animal species. The research will fund a literature review evidence that would support the development of DNA barcoding and other DNA detection methods for three important invasive species; Cabomba caroliniana (fanwort), Myriophyllum heterophyllum (broadleaf watermilfoil) and Lagarosiphon major (curly waterweed) and assess wider applicability for aquatic species ...

Researchers have found that invasive birds play a critical role in the ecosystem of the Hawaiian island of Oahu, where native species have almost totally disappeared.

Increased movement of people and products across international borders heightens the risk of introducing invasive species-such as the longhorn beetle or the imported fire ant-that can reduce crop and livestock production or harm natural resources and amenities. In response, ERS initiated the Program of Research on the Economics of Invasive Species Management (PREISM) in 2003, whereby ERS funds several extramural research projects each year and conducts inhouse research . PREISM research focuses on three general themes: international dimensions of invasive species (IS) prevention and management; development and application of methods to analyze important IS issues, policies, and programs; and analysis of economic, institutional, and behavioral factors affecting decisions to prevent or manage IS.

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Invasive plant species can potentially exert competitive or facilitative effects on insect pollination services of native species. Factors that influence these effects include the degree of shared pollinator species ...

The tidal estuarine wetlands of China are rich in plant diversity, but several human-driven processes, such as species invasion, can affect the biogeochemical cycles of these ecosystems, and by changing soil conditions can inhibit the regeneration of native vegetation. We seasonally analyzed the carbon (C), nitrogen (N) and phosphorus (P) concentrations in soils and in leaves, stems and roots of the invasive species Spartina alterniflora and of the native species Cyperus malaccensis var. brevifolius Boeckeler. This latter species was analyzed both in natural non-invaded stands and in stands that had been invaded by Spartina but from which it had been removed and replaced by Cyperus. The aim was to investigate the effect of plant invasion, subsequent removal and replanting with a native species on C, N and P stoichiometry of the plant-soil system in the tidal wetlands of the Minjiang River. C and N concentrations averaged across seasons did not differ significantly among the plant species. P ...

People dont realize how far it is to the next solar system, before believing in aliens it is important to question the reasons why an alien species would come to earth. If they knew we were hear, there is no reason to travel the distance just to see us, as if some civilization possessed the technology to transverse light years and live for it then it is an obvious assumption to make that they wouldnt need anything from us. With nanotechnology we can achieve the transition to a type 2 civilization and thus power everything with solar energy, there is no need for resources once we achieve that there is not much else we would have to worry about other than the economy. So if we can use nanotechnology and understand it to that degree, and still have no idea whatsoever of a method to transverse space, then these alien species would probably also have achieved unlimited resources before learning a method of space travel, and thus there would be no reason whatsoever to come to earth ...

These MEAM parameters for elements C and H as well as the diatomic CH are appropriate for energy minimization and reactive molecular dynamics simulations of SATURATED hydrocarbons, where all carbon atoms have the sp3 hybridization (single C-C bonds).[1] At the current state, MEAM cannot handle unsaturated compounds with great accuracy. Furthermore, these C and H parameters are not appropriate for diamond and graphite systems. Modification of the MEAM potential to include unsaturated C-C bonds, i.e., double and triple bonds, as well as its parameterization for elements oxygen and nitrogen is ongoing work. For the first time, MEAM can be used to simulate hydrocarbons and hydrocarbon/metal systems, since it has a large parameter database for major metals in the periodic table of elements. Since MEAM is a reactive potential, it can also be used to simulate fracture and fatigue in hydrocarbon-based polymers, such as polyethylene and polypropylene and their composites with nanometals as well as ...

The first international programme on invasive species was started in 1982. Entitled Ecology of biological invasion, it was launched on the initiative of the Scientific Committee on Problems of the Environment (SCOPE), a body established by the International Council for Science (ICSU). One of the first publications issued by the programme, in 1986, concerned Australia, where the number of species introduced and naturalised in at least four States has increased in linear fashion since the arriv...

This research looks at how lionfish adapt to different sea-water temperatures. This physiological experiment compares how 20 lionfish adapt to increasing water temperatures by being placed in specially designed water tanks. The data can be plotted simply or be treated in more complex manner using statistical tests. Lionfish are also significant predators on coral reefs and they are expanding their range by their ability to adapt to rising sea water temperatures. They could pose a real threat by being significant invasive species ...

In our vastly urbanized world, there isnt much natural or undeveloped landscape left for wildlife. Therefore, we must protect our natural and urban forests from further alteration from invasive plants; an easy and fun way to do this is to choose to grow native plants in our gardens and on our landscapes. The Pollinator Pathway Project encourages gardeners to choose to grow native plants rather than exotic or plant species known to be invasive.. Many invasive plants were once considered to be desirable garden and landscape plants that overtime escaped our gardens and caused harm to our natural areas. For example, invasive honeysuckles (Lonicera spp.) were intentionally planted to beautify lawns and were thought to provide habitat and help stabilize roadsides to reduce erosion. Now, invasive honeysuckle has proven to outcompete our native vegetation and alter our natural ecosystems. There are many other examples of exotic plants that were introduced intentionally, to either beautify our ...

Consider the cumulative impact of this species on the animals, fungi, microbes, and other organisms in the communities that it invades. Although a non-native species may provide resources for one or a few native species (e.g. by providing food, nesting sites, etc.), the ranking should be based on the species net impact on all native species. Give more weight to changes in composition and interactions involving rare or keystone species or rare community types ...

Analysis of the amount and distribution of genetic variation can yield information about the number of introductions and history of an invasive species, which may be relevant for understanding the evolutionary potential and spread of invaders, as well as for creating best management practices for curbing them. We explored the genetic patterns and invasion history of the perennial, ornamental herb Lupinus polyphyllus Lindl. in Finland, where the species has spread rapidly during the past hundred years. Using 13 microsatellite loci, we determined the genetic variation of L. polyphyllus in 51 sites across a latitudinal gradient that reflected the invasion history of the species in this country. We found that the sampled populations were significantly genetically differentiated among sites, as indicated by the global F(ST) value (0.19) and AMOVA results (16.7 % of total genetic variation occurred among sites), and this differentiation slightly increased with increasing geographic distance (r = ...

The grass is growing and our horses are excitedly starting to nibble at the little green bits popping through the finally thawed ground. Through all the excitement, and in general, it can be quite easy to over indulge. Most of us think that a green pasture is the best most natural thing we can do for our horse. In reality, however, the high sugar levels in grass can be disastrous for your horses health, body, hooves and digestive tracts. If your horse spends a lot of time in a grassy turnout, or is out in a pasture make sure you let them adjust to the large quantities of grass slowly. Sugar production in grass is the highest mid-morning so turning your horses out before then could benefit your animal tremendously.. Additionally, many invasive plant species can be poisonous and sometimes fatal to your horse. With spring comes the bloom of beautiful, but potentially poisonous plants. Some of the common culprits frequently found in turnout and fields include:. Ground Ivy: an incredibly invasive ...

Information concerning the area of origin, genetic diversity and possible acquisition of germplasm through hybridization is fundamental to understanding the evolution, ecology and possible control measures for an introduced invasive plant species. Rhododendron ponticum is extensively naturalized in the British Isles, but it is not known whether native material in Turkey, Spain or Portugal gave rise to the naturalized material, or to what extent introgression has affected this material. Chloroplast (cp) and nuclear ribosomal DNA (rDNA) restriction fragment length polymorphisms (RFLPs) were sought which could distinguish between native material of R. ponticum, and between 15 other Rhododendron species including R. ponticums closest relatives. Thereafter, a total of 260 naturalized accessions of R. ponticum from throughout the British Isles was examined with respect to informative polymorphisms. It was found that 89% of these accessions possessed a cpDNA haplotype that occurred in native material ...

That is raising concern over the possible spread of the virus, which is not usually fatal but can cause fever and debilitating joint pain and cannot be treated. Though experts considered chikungunyas spread to the United States inevitable, they are unsure if it will bring any outbreaks or how widespread they might be.. Its certainly expected - a number of us had predicted it several years ago, said Barry Beaty, a professor of virology at Colorado State University and a member of the Baltimore-based Global Virus Networks chikungunya task force. Mother Nature is conducting an experiment on us, unfortunately.. State health officials said this week they have begun annual monitoring for West Nile and also for chikungunya, urging residents to avoid mosquito bites by using repellent, wearing long sleeves and pants when concerned about mosquito exposure, and clearing yards and other outside areas of potential mosquito breeding grounds.. An invasive species known as the Asian tiger mosquito, which ...

Q. I live in a row house with a small yard and raised bed vegetable garden that were completely overrun by Asian Tiger mosquitoes last summer. And I expect it to be just as bad if not worse this year. I am one of those people mosquitoes seem to love, and they attack me the minute I set foot in the yard. Even when I wear pants, long sleeves and a high concentration of DEET or Skin so Soft, I still get bit-and in broad daylight by these Asian Tiger buggers. The solutions I see online all involve putting stuff in the water where they lay their eggs, but we make sure not to HAVE any standing water on our property. Is there any way to combat these mosquitoes when you cant find their water source? If I garlic spray my yard, will they let me garden in peace? Id also love to be able to sit on our deck and enjoy a nice glass of wine without being overpowered by the scent of bug repellent. Any suggestions would be greatly appreciated. Thank You. ---Aimee in Ambler, PA A. Im not

context source (Introduced species) Katsanevakis, S.; Bogucarskis, K.; Gatto, F.; Vandekerkhove, J.; Deriu, I.; Cardoso A.S. (2012). Building the European Alien Species Information Network (EASIN): a novel approach for the exploration of distributed alien species data. BioInvasions Records. 1: 235-245., available online at http://easin.jrc.ec.europa.eu [details] ...