Due to these severe negative effects, a number of strategies have been proposed to control HABs, involving ultraviolet light, microwave, clay, modified sand, plants, protozoan, and Chinese traditional medicines. However, only a few of these are feasible and applicable in case of emergencies due to the high cost or side effects. In recent years, microbial agents mitigating HABs, especially naturally occurring algicidal bacteria have attracted global attention.. Algicidal bacteria play a potentially important role in regulating the growth, metabolism, and toxin production of harmful algae. Factually, relationships between algicidal bacteria and harmful algae are quite complex and have been extensively researched, of which the most conspicuous and important is the inhibition or lysis of harmful algae by algicidal bacteria. Consequently, plenty of algicidal bacteria which mainly belong to genera Pseudoalteromonas, Alteromonas, Vibrio, Cytophaga, and Saprospira were isolated. The negative effects of ...
Harmful algal blooms (HABs) can lead to substantial socio-economic losses and extensive damage to aquatic ecosystems, drinking water sources and human health. Common algicidal techniques, including ozonation, ultrasonic treatment and dispersion of algae-killing chemicals, are unsatisfactory both economically and ecologically. This study therefore presents a novel alternative strategy for the efficient control of deleterious algae via the use of host-specific virus-like particles (VLPs) combined with chemically synthesized algicidal compounds. The capsid protein of HcRNAV34, a single-stranded RNA virus that infects the toxic dinoflagellate, Heterocapsa circularisquama, was expressed in and purified from Escherichia coli and then self-assembled into VLPsin vitro. Next, the algicidal compound, thiazolidinedione 49 (TD49), was encapsidated into HcRNAV34 VLPs for specific delivery to H. circularisquama. Consequently, HcRNAV34 VLPs demonstrated the same host selectivity as naturally occurring HcRNAV34 ...
There is a connection between the land and sea. What we do on land often has a direct effect on the ocean. This is especially true for harmful algal blooms. Nutrients carried by runoff from land to sea can cause naturally occurring algae to bloom, and sometimes these algae produce toxin. Land-derived nutrients come from all types of sources including things like sewage waste, farm animals, and fertilizers used for agriculture, lawns, and golf courses. In addition to contributing to marine algal blooms in the ocean, these nutrients also contribute to freshwater algal blooms in watersheds. Recently, a freshwater algal toxin has been found in the marine environment of the Monterey Bay National Marine Sanctuary. This toxin is called microcystin, and the alga that produces the toxin is called Microcystis aeruginosa. Microcystin is a hepatotoxin, which means it affects the liver. Blooms of M. aeruginosa that produce microcystin can be considered cyanoHABs. If freshwater blooms are large enough, and ...
TY - JOUR. T1 - An adaptive approach to detect high biomass algal blooms from EO chlorophyll-a data in support of harmful algal bloom monitoring. AU - Shutler, Jamie. AU - Davidson, Keith. AU - Miller, Peter. AU - Swan, Sarah. AU - Grant, MG. AU - Bresnan, Eileen. N1 - Description 3* (NOTE jounral is now ISI listed) - new remote sending method for HAB monitorng - is being used operationally in industry funded project PY - 2012. Y1 - 2012. U2 - 10.1080/01431161.2010.538089. DO - 10.1080/01431161.2010.538089. M3 - Article. SP - 101. EP - 110. JO - Remote Sensing Letters. JF - Remote Sensing Letters. SN - 2150-704X. IS - 3. ER - ...
The authors are concerned with the recent harmful algal blooms in the Northwest Pacific region. The current in situ and satellite chlorophyll and sea surface temperature estimates are questioned as to their validity, particularly under cloudy conditions. Therefore, the authors combined the RCA-Chl algorithm (from SeaWiFS), sea surface temperature, sea surface height/geostrophic currents, and wind, in conjugation with in-situ observation data, to show the spatial and temporal relationships between 1998-2006 summer algal blooms and the mechanisms underlying their development. The study was divided into 5 different segments: the SCS-Taiwan segment, Taiwan-ECS segment, YS-BS segment, KS-JS-RS (Korean Sea-Japan Sea-Russian Sea) segment, and RS-North Korean segment. Four common hydrodynamically active regions (coastal cold/estuary water zones, upwelling zones next to the coast, repeated meanders/eddies, and frontal regimes induced by the Kuroshio Current) were identified in each segment. These regions ...
harmful algal blooms ( HABs), a term that many have become familiar with due to the recent and ongoing event on the Gulf Coast of Florida. In this podcast, we uncover what HABs are, what they arent, and how we can learn to minimize their effects on our daily lives.
Understanding the dynamics of harmful algal blooms (HABs) in lakes can inform management strategies to reduce their economic and health impacts. Previous studies have analyzed spatially replicated samples from a single time or have fit phenomenological models to time series data. We fit mechanistic population models to test the effects of critical nutrient concentrations and the density of potential algal competitors on population growth parameters in HABs in Lake Champlain, U.S.A. We fit models to five years (2003-2006, 2008) of weekly cyanobacteria counts. Plankton dynamics exhibited two phases of population growth: an initial
8 different lakes and ponds around the Hudson Valley are dealing with Harmful Algal Blooms. These blooms can be toxic for pets and livestock, but especially for dogs according to the DEC.
For many of us living on the southern (Gulf) coast of the USA, it has become common to see numerous dead fishes floating in the bays and scattered across our beaches. Why is this happening? You may have heard on the news that there is a large harmful algal bloom (HAB) that began off the western…
Read chapter 3 Harmful Algal Blooms: What can sharks teach us about our immune system? What can horseshoe crabs show us about eyesight? The more we learn...
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ABSTRACT: Gymnodinium catenatum is an introduced toxic dinoflagellate that blooms intermittently and causes shellfish farm closure in the Huon Estuary, Tasmania, Australia. Seventy-five bacteria isolated from the estuary were tested for algicidal activity against this and other toxic and non-toxic algal species. Five isolates produced algicidal extracellular exudates. These algicidal species were a Pseudoalteromonas sp. (ACEM 4), a novel Zobellia sp. (ACEM 20), a strain of Cellulophaga lytica (ACEM 21) and 2 Firmicutes: a novel Planomicrobium sp. (ACEM 22) and a strain of Bacillus cereus (ACEM 32). This study is the first time Gram-positive bacteria have been associated with algicidal activities. Further data are presented on an algicidal Pseudoalteromonas species previously isolated from the Huon Estuary (Strain y). Supernatant produced by all 5 strains caused cell lysis and death in G. catenatum vegetative cells. No change or reversible ecdysis was noted for 2 other endemic dinoflagellate ...
Cyanotoxins are often implicated in what are commonly called red tides or harmful algal blooms. Lakes and oceans contain many single-celled organisms called phytoplankton. Under certain conditions, particularly when nutrient concentrations are high, these organisms reproduce exponentially. The resulting dense swarm of phytoplankton is called an algal bloom; these can cover hundreds of square kilometres and can be easily seen in satellite images. Individual phytoplankton rarely live more than a few days, but blooms can last weeks.[18][19] Generally, these blooms are harmless, but if not they are called harmful algal blooms, or HABs. HABs can contain toxins or pathogens which result in fish kill and can also be fatal to humans.[19] In marine environments, HABs are mostly caused by dinoflagellates,[20] though species of other algae taxa can also cause HABs (diatoms, flagellates, haptophytes and raphidophytes).[21] Marine dinoflagellate species are often toxic, but freshwater species are not known ...
contributing to Lake Eries harmful algal blooms. Thats the premise of a new five-year, $5 million study that ... a significant driver of the harmful algal blooms plaguing Lake Erie. The blooms are sometimes toxic, are often ... phosphorus is released from the soil and ends up in Lake Erie, where it contributes to harmful algal blooms .... ...
Strasburg, Va.) - The North Fork of the Shenandoah River in Shenandoah County is experiencing a benthic harmful algae bloom (HAB) caused by cyanobacteria. Out of an abundance of caution, the public is advised to avoid contact with blue green algal mats and scum in the river from Lower River Road to Strasburg.. Some harmful algae, called cyanobacteria, can cause skin rash and gastrointestinal illnesses, such as upset stomach, nausea, vomiting and diarrhea. Cyanotoxins (anatoxin-a and microcystin) identified in the benthic mats and water column at these locations can be fatal to dogs and other animals when ingested. Currently, toxic cyanobacteria and toxins in the water column itself do not exceed recreational water advisory thresholds. The cyanobacteria in this portion of the river creates algal mats. The cyanobacteria are producing toxins which are typically contained within mat material - people and pets should avoid contact with mat material which may be in the water or which may accumulate ...
When an algae produces toxins, the bloom is known as a harmful algal bloom (HAB). State parks, wildlife, or fisheries departments are often the ones charged with monitoring HABs and making decisions about when to close lakes and other waterways. Even if an algal bloom does not qualify as an HAB, it can still kill fish and other aquatic organisms by using up all the oxygen in the water.. Cyanobacteria can produce several toxins. Some toxins include cylindrospermopsin, microcystin, saxitoxin. Some cyanobacteria produce more than one toxin. One species of cyanobacteria found in Grand Lake St. Marys in western Ohio this year produces seven different toxins.. The different toxins have different effects on people and animals. Effects range from rash and itching, to vomiting and dizziness, to liver and nerve damage. Animals have died and people have become severely ill just from coming in contact with the water containing cyanobacteria toxins.. Not all cyanobacteria are toxic to us or other large ...
The Eugene Water & Electric Board is interested in tracking algal blooms in the watershed to assess the presence of potentially harmful cyanobacteria species that may produce toxins.
A harmful algal bloom (HAB) is an algal bloom that causes negative impacts to other organisms via production of natural toxins, mechanical damage to other organisms, or by other means. Although they are a small percent of the algal species, toxic algae blooms have a large impact.. A broad classification of HABs distinguishes two groups of organisms: the toxin producers, which can contaminate seafood or kill fish, and the high-biomass producers, which can cause anoxia and indiscriminate kills of marine life after reaching dense concentrations. Some HABs have characteristics of both.. Some harmful algae species produce toxins that have devastating effects on fish and other marine life, both in wild and aquacultures. Several species can produce toxins which damage fish gills by hemolytic effects. This has resulted in extensive fish kills with major economic losses. Other algal species can kill fish, as a result of suffocation, when they decay and consume oxygen from the water (see Ecosystem ...
PUT-IN-BAY, Ohio (AP) - Potentially toxic algae is expected to form again this summer in western Lake Erie but should be considerably less severe than the blooms that blanketed the lake and threatened drinking water supplies the previous two years, scientists said Thursday.. After three wet springs, the regions rainfall was more normal this year, said Richard Stumpf of the National Oceanographic and Atmospheric Administration. That means less phosphorus from farms and sewage treatment plants has washed into the Maumee River and other tributaries that discharge into the lake, feeding harmful algae.. With a return to average spring discharge, and much lower river flow in June than in the recent years, the western basin should look better, said Stumpf, of NOAAs National Centers for Coastal Ocean Science and the agencys top Lake Erie algae forecaster.. Even so, a bloom of mild to moderate size is likely to show up late this month, reach its peak size in August and possibly linger into October, ...
Climate change is increasing the prevalence of harmful algal blooms worldwide A harmful algal bloom (HAB) is the accumulation of toxin producing algae in marine and fresh water sources that can negatively impact other organisms. These blooms can be invisible to the eye or alter the color of the water to shades of green, brown, orange, or red. HABS can be harmful to humans, marine animals, livestock, drinking water, agricultural and marine sources of food for humans and animals, and can have devastating impacts on the economy worldwide.. Increase in nutrients, temperature, ocean currents, and weather events contribute to the occurrence of HABs. As a result, climate change has been thought to affect the frequency and severity of toxic blooms. According to the National Oceanic and Atmospheric Administration (NOAA) HABS appear to be increasing along coastlines throughout the US and this is a cause of grave concern for those affected by the shellfish industry including consumers, harvesters and ...
The North Texas Municipal Water District (NTMWD) reports that an algal bloom is increasing in its reservoirs and may begin to affect the odor and taste of water in Richardson and the other cities it supplies with water.. An algal bloom occurs naturally when high temperatures and dry weather provide good conditions for the Nostoc and Anabaena species of blue green algae to reproduce, or bloom. The phenomenon typically occurs in the North Texas region in late July and August and does not pose any health risks.. NTMWD employees monitor algae levels in the water and take steps to minimize the changes in taste and odor.. Currently, NTMWD is preparing to implement ozonation, a new water treatment process that is expected to reduce or eliminate many of the odor and taste issues experienced during lake algal blooms. Full implementation is expected to be complete in early 2014. ...
In order to test the use of lectins as a tool for the differentiation of harmful algal species, 13 species and 23 strains of algae were tested with 14 fluorescein isothiocyanate (FITC)-conjugated lectins, and the results examined using flow cytometry (FCM), epifluorescence microscopy (EFM) and spectrofluorometry (SFM). The lectin probes SBA, WGA, GSL I, DBA and PHA-E could distinguish between morphologically similar Gymnodinium-like species, such as Karenia mikimotoi (GMDH01), Takayama pulchellum (TPXM01) and Gymnodinium sp. (GspXM01), by their different binding activities. With the precise quantitative measurements of binding obtained using SFM and FCM, lectins appeared to be useful in distinguishing different strains of the same species. The results also showed that PHA-E could differentiate Alexandrium tamarense (ATDH04) from other strains of this species, and SJA could distinguish A. tamarense (ATMJ02) from other strains of this species (including ATMJ01). Similarly, PNA could identify A. ...
Bluetongue virus (BTV) can be an arthropod-borne pathogen that triggers an often fatal, hemorrhagic disease in ruminants. for recognition of antibodies against the VP7 antigen. These data reveal that VSV replicon contaminants potentially stand for a secure and efficacious vaccine system with which to regulate long term outbreaks by BTV-8 or additional serotypes, specifically in previously non-endemic regions where discrimination between infected and vaccinated animals is vital. Introduction Bluetongue can be a hemorrhagic disease of ruminants thats due to bluetongue pathogen (BTV), an associate from the genus Orbivirus within the family midges. In cattle, goats, and wild ruminants, BTV contamination is typically asymptomatic despite prolonged viremia. These host species represent a potential reservoir for unnoticed dissemination of BTV in ruminant populations. In sheep, however, BTV contamination often results in an acute disease with associated high morbidity and mortality, depending on the ...
Physical activity is effective for those who have dementia. [18,19]. A recently available systematic review discovered 41 workout and exercise interventions designed designed for people who have dementia, including fitness/aerobic exercises, exercises for coordination, flexibility and balance, strength exercises, stamina/resistance schooling and walking programs [20]. Entinostat distributor Regardless of the plethora of analysis within this specific region, there happens to be no theoretical construction to inform the look of effective interventions marketing exercise in people who have dementia. The prevailing behaviour change ideas may possibly not be suitable to fully capture the uniqueness of the knowledge of coping with dementia (e.g., storage problems having a poor impact on inspiration and self-confidence) and could neglect to accurately recognize the elements associated with exercise and exactly how these mediate adherence and involvement outcomes. THE UNITED KINGDOM Medical Analysis ...
We also encourage you to educate bathers about risks related to swimming in untreated venues such as lakes, where exposure to Naegleria fowleri, the brain-eating ameba, and harmful algal blooms (HABs) can occur. In consultation with state and federal partners, CDC developed the One Health Harmful Algal Bloom System (OHHABS), which provides local, state, and territorial public health partners a mechanism to voluntarily report human and animal cases of harmful algal bloom-associated illness. CDC launched OHHABS in June 2016. To learn more about OHHABS, visit www.cdc.gov/habs/ohhabs.html.. To encourage and support your HSSW efforts, we have provided this health promotion toolkit, which includes community outreach suggestions; a web-based resource list; and a sample press release, op-ed piece, and proclamation. We hope you will find these resources useful as you engage your community during HSSW. For additional information about HSSW, visit: ...
Scientists are trying to learn why blooms of toxic algae are forming in the Straight of Juan de Fuca, a part of the ocean that separates Washington State from British Columbia, Canada. When theres a toxic algae bloom, the toxins accumulate in shellfish and beaches have to be closed where people go for fishing and recreation.. Scientists have learned that the Juan de Fuca eddy often has large populations of the microscopic toxic alga, Pseudo-nitzschia. This biotoxin can be harmful to humans or can cause death in birds, marine mammals and humans who eat affected marine species. Toxic algae can also hurt the economy in coastal communities that contain commercial fisheries, recreation, and tourism. Understanding how and where harmful algal blooms originate will help provide early warnings to protect human health and reduce the impact of biotoxins on coastal shellfisheries, said Vera Trainer, a scientist at the NOAA Fisheries Northwest Fisheries Science Center in Seattle.. ...
Use back to return to the text.). Human activities enter the picture when we consider these vast biogeochemical cycles and the oceans. For example, agriculture, mining, and the burning of fossil fuels have increased nutrient levels in the environment. Nutrients can serve as limiting factors controlling the biodiversity, dynamics, and functioning of many ecosystems.. Nutrients that find their way to the ocean from runoff and sewage can stimulate the growth of algae and lead to harmful algal blooms and the dead zones caused by loss of oxygen. They also can contribute to fish kills, loss of seagrass beds, degradation of coral reefs, and loss of commercial and sport fisheries and shellfish industries.. Yet we still know little about the controls on nitrogen fixation and denitrification processes in ocean water and about the triggers of harmful algal blooms. Similarly, we have not unraveled the effects on coastal oceans of the buildup of phosphorus in agricultural soils. Knowledge about these ...
The main goal of the present thesis was to study some harmful algal species which cause blooms in Italian coastal waters, leading to consequences for human health, coastal ecosystem, fishery and tourism. In particular, in the first part of this thesis the toxicity of Adriatic strains of the raphidophyte Fibrocapsa japonica was investigated. Despite several hypotheses have been proposed for the toxic mechanism of the raphidophytes, especially for the species Chattonella antiqua and C. marina, which have been studied more extensively, just a few studies on the toxic effects of these species for different organisms were reported. Moreover, a careful reading of the literature evidenced as any ichthyotoxic events reported worldwide can be linked to F. japonica blooms. Although recently several studies were performed on F. japonica strains from the USA, Japan, Australia, New Zealand, the Netherlands, Germany, and France in order to characterize their growth and toxicity features, the work reported in ...
The harmful algal blooms devastated marine life primarily in estuarine and nearshore habitats, including seagrass/mangrove habitats, and nearshore reefs. Those essential fish habitats, which are federally designated Habitat Areas of Particular Concern (HAPC) - the highest level of protection for coastal/marine habitats - are essential to myriad fish species, especially fish in juvenile life stages. Especially from Tampa Bay southward, we probably lost large percentages of brood stock and rising year classes among species that spend most or all of their lives in shallow water - species as vitally important to our economy as snook, red drum, and spotted seatrout.. It is also almost certain that we lost major percentages of the young fish from rising year classes across many federally managed species. Those species include fish that grow up in state waters but are generally harvested as adults in federal waters. The harmful algal blooms are especially punishing in the area between Tampa Bay and ...
Worldwide, 60% of cyanobacteria, or blue-green algae samples contain harmful toxins that could lead to adverse health effects in both humans and animals. When these bacteria proliferate they are known as Harmful Algal ...
Jackson, Wyoming (PRWEB) August 01, 2017 -- Film by Bo Landin profiles the work of Dr. Paul Cox and the nonprofit research consortium Brain Chemistry Labs in J
Harmful algal blooms in the Red Sea could be detected from satellite images using a method developed at KAUST. This remote sensing technique may eventually lead to a real-time monitoring system to help maintain the vital ...
TY - JOUR. T1 - UV-LED/PMS preoxidation to control fouling caused by harmful marine algae in the UF pretreatment of seawater desalination. AU - Lee, Hyunkyung. AU - Lim, Jihun. AU - Zhan, Min. AU - Hong, Seungkwan. PY - 2019/10/1. Y1 - 2019/10/1. N2 - Preoxidation is gaining spotlight in the mitigation of ultrafiltration (UF) membrane fouling caused by algal organic matter (AOM). Although it is known to be beneficial in freshwater, its applicability in seawater treatment has barely been explored. This study first evaluated the effect of UV/permonosulfate (PMS) oxidation for UF process against marine harmful algal blooms (HAB). The transition of AOM released from Pseudo Nitzchia was investigated which produces a neurotoxin, domoic acid (DA). Specifically, UV light emitting diodes (LED) were employed as UV source. The results indicated UV-LED/PMS treatment effectively reduces the fouling potential of AOM. However, the participation of abundant chloride ions generated free chlorine and disinfection ...
Diaz, P., Varela, D., Pérez-Santos, I., Díaz, M., Molinet, C., Seguel, M., Aguilera-Belmonte, A., Alvarez, G., Uribe, E., Rengel, J., Hernández, C., Segura, C., Figueroa, R.I. 2019. Impacts of harmful algal blooms on the aquaculture industry: Chile as a case study. Perspectives in Phycology. DOI: 10.1127/pip/2019/0081. Cuadrado, A., de Bustos, A., Figueroa, R.I. 2019. Chromosomal markers in the genus Karenia: Towards an understanding of the evolution of the chromosomes, life cycle patterns and phylogenetic relationships in dinoflagellates. Scientific Reports. DOI:10.1038/s41598-018-35785-7.. Figueroa, R.I., de Bustos, A., Cuadrado, A. 2018. A novel FISH technique for labeling the chromosomes of dinoflagellates in suspension. PlosOne 13(10): e0204382. https://doi.org/10.1371/journal.pone.0204382. Figueroa, R.I., Estrada, M., Garcés, E. 2018. Life histories of microalgal species causing harmful blooms: Haploids, diploids and the relevance of benthic stages. Harmful Algae 73:44-57. ...
Researchers studying the waters of Northport Harbor say theyve found a type of harmful algae in the water never seen before at these levels in New York. The algae, Dinophysis acuminata, produces a to
redOrbit Staff & Wire Reports - Your Universe Online. It may be called the Yellow Sea, but the northern part of the East China Sea has turned green due to the largest algal bloom in the history of the Asian nation, various media outlets are reporting.. According to AFP news agency reports, the State Oceanic Administration is reporting that the algae, which is known as Enteromorpha prolifera, started appearing about one week ago, and among the places affected are a public beach in Qingdao, northeast Chinas Shandong province.. Pictures have surfaced showing beach-goers swimming and enjoying the sunshine at the beach - undeterred by the algal bloom, which had spread across an 11,158 square mile (28,900 square kilometer) area. Previously, the largest aggregation of Enteromorpha prolifera was 5,019 square miles (13,000 square kilometers) in 2008.. Officials in the city of Qingdao had used bulldozers to remove 7,335 tons of the growth from beaches, said Karl Mathiesen of the Guardian. While the ...
Marie Manandise and Tom Sumner. CoMPLEX, University College London, 4 Stephenson Way, London, NW1 2HE. a. b. RED TIDES: Causes, Consequences and Control of Algal Blooms. Slideshow 151784 by Jimmy
Is Lake Erie glowing a ghostly green in preparation for Halloween? Or perhaps an extreme premature St Patricks Day prank? Not quite.. These stunning images show the giant North American lake bursting with a vibrant green hue due to a harmful algal bloom. The satellite images, shown in natural color, were taken on September 26, 2017, by the Operational Land Imager (OLI) onboard the Landsat 8 satellite. Theres also some rather beautiful aerial photography of the phenomenon taken by pilots flying above Ohio. This years bloom was first reported in July in Maumee Bay, but has since spread eastwards and northwards within the lakes western basin, along the shore of Michigan, Ohio, and Ontario.. The prime suspect behind the algal bloom is phosphorus draining into the lake from agricultural or industrial sources. This phosphorous makes the algae go into a feeding frenzy when it enters the water. This process is known as eutrophication.. The bloom contains Microcystis, a type of freshwater ...
Other challenges identified in the monitoring of algal blooms using remote sensing data include viewing blooms in inland water regions, particularly in small bodies of water, and in highly turbid environments that block out easier views of algal growth. In fact, most papers in recent years have focused on inland regions, as open ocean areas have been seen to be better captured by low resolution systems such as MODIS and MERIS. Improvements in adjacency correction, inversion-based retrieval models and optical property measurements have, however, allowed advancements to be made in these inland areas in the last few years.[3]. Increased spatial and spectral range of hyperspectral sensors on airborne instruments, such as MASTER, HICO, and AVIRIS data, have also enabled better differentiation of algal species in smaller, inland bodies of water. One study in Pinto Lake California demonstrated that Aphanizomenon and Microcystis species could be separated using a spectral shape algorithm. Regular ...
...NOAA and the National Science Foundation have awarded $824225 in comp...Pseudo-nitzschia algae occur along the Washington coast and produce to... Better information about where HABs generate and how they are transpo...ECOHAB has been operating since it was first authorized by the Harmful...,New,project,to,forecast,toxic,algal,blooms,on,Pacific,Northwest,beaches,biological,biology news articles,biology news today,latest biology news,current biology news,biology newsletters
The NSW government is investigating the cause and extent of shocking algal bloom events in the states far west near Broken Hill, that may have killed a million or more fish.
The dinosaur-killing asteroid that hit Earth about 66 million years ago likely triggered giant algal blooms that killed ancient marine life.
Important questions remain about the ultimate fate of all that carbon taken in by algal blooms, the researchers say. Much of it is probably recycled back to the atmosphere by bacteria. But its also possible that the virus-infected algae release sticky sugars and lipids, leading their cells and the carbon within them to sink faster to the ocean floor. If the latter scenario is true, it will have a profound impact [on] the efficiency of carbon dioxide pumping from the atmosphere to the deep ocean, Vardi says. This carbon will then have a better chance [of being] buried in the ocean sediment ...
Find algal bloom control (water and wastewater) books and publications on Environmental XPRT, the worlds largest environmental industry marketplace and information resource.
PROVO, Utah (ABC4 Utah) Utah County Health Department officials have updated advisories related to the algal bloom in Utah County waterbodies.
Algae can grow in warm, nutrient-rich fresh and marine waters. When there is an abundant growth of algae that harms people or animals, its referred to as harmful algal bloom (HAB). HABs in fresh and marine waters can produce toxins that cause skin irritation, coughing, sneezing, diarrhea, stomach pain, numbness, and dizziness. Symptoms vary depending on the type of HAB toxin and type of exposure - such as skin contact, ingestion by eating food or drinking water thats contaminated with HAB toxins or even breathing in tiny droplets or mist contaminated with HAB toxins.. ...
Find algal bloom test articles on Environmental XPRT, the worlds largest environmental industry marketplace and information resource.
This NASA Earth Observatory article presents information about programs that are monitoring red tide and other harmful algal bloom (HAB) outbreaks from satellite imagery and remote sensing. This ...
Singapore isolates of the dinoflagellate |i|Gymnodinium catenatum|/i| (Dinophyceae) produce a unique profile of paralytic shellfish poisoning toxins
In the Dutch coastal area, harmful algal blooms of Phaeocystis occasionally cause mass mussel mortality in the aquaculture area Oosterschelde. To enable early warnings about future harmful algal blooms to mussel farmers and other end users, an information system is being developed based on the combination of remote sensing data (MERIS sensor on the ENVISAT satellite), field data and model data from WL , Delft Hydraulics ecological model GEM for the Dutch Voordelta area. The information system is being developed as a collaboration between WL , Delft Hydraulics, IVM (Free University, Amsterdam) and the National Institute for Coastal and Marine Management (RIKZ). The field data and remote sensing data give information about the actual status of the spring phytoplankton bloom. The use of the model allows for near real-time forecasting of Phaeocystis blooms. The complementary use of three data sources compensates for the limitations of each of the data sources. The information on the status of the ...
The 17th edition of the International Conference on Harmful Algae (ICHA) will be held in the city of Florianópolis, state of Santa Catarina, Brazil from October 9th to 15th 2016. Registrations and Abstract submissions are open. Get ready!
Toledo, OH - The Environmental Law & Policy Center (ELPC) today filed a new related lawsuit in the United States District Court for the Northern District of Ohio challenging the United States Environmental Protection Agencys approval of an Ohio EPA July 2018 report as legally inadequate. The Ohio EPAs 2018 report provided no effective plan for reducing phosphorus pollution into western Lake Erie which is now designated as impaired waters under the Clean Water Act.. ELPC and co-plaintiff Advocates for a Clean Lake Erie (ACLE) are seeking a judicial remedy providing a compliance plan to require progress on a specific timeline to reduce phosphorus pollution in western Lake Erie by 2025, and provide for public accountability. Phosphorus in manure and fertilizer runoff from agricultural sources is the principal cause of harmful algal blooms that have plagued Lake Erie for many years.. The Clean Water Act provides a specific legal pathway to reduce phosphorus pollution causing harmful algae ...
Dinoflagellates are a major cause of harmful algal blooms, with consequences for coastal marine ecosystem functioning and services. Representatives of Alexandrium tamarense species complex are of the most abundant and widespread toxigenic species, and produces paralytic shellfish poisoning toxins as well as allelochemical substances. This species complex consists of four to five species. The debate of the separation of this complex into real species in long on going and here a concept for the divorce of this group will be proposed. Problems with identification of a toxic member of this species complex in November 2012, which led to the accidental export of toxic mussels to Japan, has now led to severe restrictions on Australian shellfish exports to Japan for a year, and resulting losses of many million $. Furthermore, population genetic insight and adaptive strategies in species interaction processes will be presented. Allelochemical mediated intra-population facilitation, may explain at least ...
Shellfish poisoning is the illness or death of humans, and other mammals and seabirds, caused by the consumption of shellfish that have been contaminated by eating toxin‐producing microscopic algal species during harmful algal blooms (HABs)
The presence of harmful algal blooms (HABs) can result in the accumulation of phycotoxins in shellfish such as mussels, scallops and oysters. Depending on the toxins present, consumption of contaminated shellfish can lead to illness in humans including amnesic, diarrheic or paralytic shellfish poisoning (ASP, DSP or PSP respectively). There is currently a lack of suitable rapid screening tools to complement accepted reference methods for the detection of marine biotoxins. The aims of the thesis were to develop a range of simple and accurate lateral flow immunoassays (LFIA) for the rapid screening of phycotoxins from shellfish extracts, which could be performed either in a laboratory or in the field. As a result, three novel single-step LFIAs were developed and validated for the major regulated toxins responsible for ASP, DSP and PSP, respectively. One of the challenges was to ensure that the thresholds for test~ were based at concentrations relevant to regulations, whilst minimizing the risks of ...
Dense surface blooms of toxic cyanobacteria in eutrophic lakes may lead to mass mortalities of fish and birds, and provide a serious health threat for cattle, pets, and humans. It has been argued that global warming may increase the incidence of harmful algal blooms. Here, we report on a lake experiment where intermittent artificial mixing failed to control blooms of the harmful cyanobacterium Microcystis during the summer of 2003, one of the hottest summers ever recorded in Europe. To understand this failure, we develop a coupled biological-physical model investigating how competition for light between buoyant cyanobacteria, diatoms, and green algae in eutrophic lakes is affected by the meteorological conditions of this extreme summer heatwave. The model consists of a phytoplankton competition model coupled to a one-dimensional hydrodynamic model, driven by meteorological data. The model predicts that high temperatures favour cyanobacteria directly, through increased growth rates. Moreover, ...
Alcock, F. 2007. An assessment of Florida red tide: Causes, consequences and management strategies. Mote Marine Laboratory, technical report 1190.. Anderson, D. M., P. M. Glibert, and J. M. Burkholder. 2002. Harmful algal blooms and eutrophication: nutrient sources, composition, and consequences. Estuaries 25:704-726.. Ann Arbor, MI. 2011. Phosphorus fertilizer ordinance. http://www.a2gov.org/government/publicservices/systems_planning/environment/pages/phosphorusfertilizer.aspx Arrington, D. A., and K. Y. Melton. 2010. Unintended Consequences : Numeric Nutrient Criteria Will Constrain Reuse Opportunities. http://www.dgfirm.com/images/arrington-melton_reuse-NNC-v2%20_3_.pdf [delinked 5 June 2012]. 25th Annual WateReuse Symposium, September 2010. Washington, D.C. [5 June 2012].. Association of California Water Agencies. Water Quality. Available http://www.acwa.com/content/advocacy/issues/water-quality (verified 22 April 2011).. Baker, L. D. 2007. Stormwater pollution: Getting at the source. ...
The National Aeronautics and Space Administration (NASA) Glenn Research Center partnered with the National Oceanic and Atmospheric Administrations (NOAA) Great Lakes Environmental Research Laboratory and the State of Ohio to address the recurrence of harmful algal bloom (HAB) events in the Great Lakes.. Generally within a 4- to 8-week period in late summer, HABs pose a significant threat to humans and wildlife, form, spread, and then disappear. HABs commonly contain a toxin called microcystin, which poses a threat to human health and wildlife. For humans, microcystin can cause serious liver damage and has been linked to pansteatitis, a condition in which body fat becomes inflamed. Some scientists suggest a link between the presence of microcystin in drinking water and some forms of liver and colorectal cancer.. The toxin also can cause mass deaths of fish, and consuming them proves harmful. Early detection can minimize threats of toxic drinking water, provide alerts to close recreational areas ...
Whats causing the mortality spike of right whales, particularly the very young? Until now, scientists were unsure what was causing such a spike in mortality, but a recent NOAA analysis suggests toxic algal blooms may be to blame.
Coastal zones support fisheries that provide food for humans and feed for animals. The decline of fisheries worldwide has fostered the development of aquaculture. Recent research has shown that extracellular polymeric substances (EPS) synthesized by microorganisms contribute to sustainable aquaculture production, providing feed to the cultured species, removing waste and contributing to the hygiene of closed systems. As ubiquitous components of coastal microbial habitats at the air-seawater and seawater-sediment interfaces as well as of biofilms and microbial aggregates, EPS mediate deleterious processes that affect the performance and productivity of aquaculture facilities, including biofouling of marine cages, bioaccumulation and transport of pollutants. These biomolecules may also contribute to the persistence of harmful algal blooms (HABs) and their impact on cultured species. EPS may also exert a positive influence on aquaculture activity by enhancing the settling of aquaculturally valuable larvae
Different Color Blooms on Same Plant. Gardening is full of surprises. One of the most interesting is the occurrence of blooms of different colors on a single plant. Sometimes this is caused by flowers changing color as they age. Other times, spontaneous genetic mutations cause color change on a particular stalk or ...
Epsom Salts for the Garden. Are the leaves on your tomatoes or pepper plants turning yellow? Want more blooms on your rose bushes? Wondering why your lawn is looking brown? Boost plants and grass with Epsom salt, high in magnesium and sulfur. Helps plants grow greener with higher yields and more blooms. This site tells you how much to use for type and size of plant or square footage of ground. by rosetta on Indulgy.com
Our work also involves using sensors and models to specifically quantify and characterize the various particulate and dissolved materials in seawater for ocean biogeochemical research areas that include phytoplankton ecology, harmful algal blooms, particle thin layers, sediment transport, air-sea flux and carbon dynamics. Optical sensors can resolve these dynamics over spatial scales ranging from the microscopic to planetary.. Developing transformative optical technologies such as lidar (light detection and ranging), passive and active compressive imaging systems, in-water holographic imaging microscopy and state-of-the-art inherent optical property sensors employing light scattering, absorption and fluorescence to study challenging problems in oceanography is a strong focus area of our group. The Ocean Optics team is highly interdisciplinary with collaborations in the fields of ocean engineering and all primary disciplines of oceanography. We have worked in regions ranging from inland and ...
Elevated nitrate (NO3−) concentrations can cause eutrophication, which may lead to harmful algal blooms, loss of habitat and reduction in biodiversity. Denitrification, a dissimilatory process that removes NO3− mainly as dinitrogen gas (N2), is believed to be the dominant NO3− removal pathway in aquatic ecosystems. Evidence suggests that a less well-studied process, dissimilatory nitrate reduction to ammonium (DNRA), which retains nitrogen (N) in the system, may also be important under favorable conditions. Using stable isotope tracers in sealed microcosms, we measured the potential for NO3− losses due to DNRA and denitrification in an oligotrophic freshwater ecosystem. We took sediment and water samples at runoff and baseflow, across several ecotypes. Our objective was to quantify the relative importance of DNRA compared to denitrification with changes in ecotype and season. Potential denitrification rates ranged from 0 to 0.14 ± 0.03 µgN gAFDM−1 d−1. -Potential DNRA rates ranged from 0
Stormwater discharge from transportation, municipal and agricultural sources may contain various pollutants that can deteriorate water quality of receiving water bodies and threaten public health. Nitrate and phosphate are two important nutrients identified in stormwater runoff. Elevated nutrient levels in surface waters can lead to eutrophication and frequent harmful algal blooms. Woodchip bioreactors have been used to remove nitrate from stormwater runoff. However, woodchips are not effective at phosphate removal. Water treatment residuals (WTR) are sludge produced during coagulation and flocculation processes during drinking water treatment. WTRs typically contain large amounts of aluminum, iron, or calcium compounds with high phosphate adsorption capacity. The objective of this project is to investigate the performance of WTR coated woodchips for nitrate and phosphate removal from stormwater runoff and evaluate the recovery potential of phosphate adsorbed by WTRs. Laboratory batch and column ...
Anderson, E.J. and D.J. Schwab. 2017. Meteorological influence on summertime baroclinic exchange in the Straits of Mackinac. Journal of Geophysical Research: Oceans. 122(3):2171-2182. (DOI:10.1002/2016JC012255). Anderson_etal.pdf. Beletsky, D. Beletsky, R. Rutherford, E.S., Sieracki, J.L., Bossenbroek, J.M., Chadderton, W.L., Wittman, M.E., Annis, G.M. and Lodge, D.M. 2017. Predicting spread of aquatic invasive species by lake currents. Journal of Great Lakes Research. 43(3):14-32. (DOI:10.1016/j.jglr.2017.02.001). Beletsky_etal.pdf. Berry, M.A., T.W. Davis, R.M. Cory, M.B. Duhaime, T.H. Johengen, C.L. Kling, J.A. Marino, P.A. Den Uyl, D.C. Gossiaux, G.J. Dick and V.J. Denef. 2017. Cyanobacterial harmful algal blooms are a biological disturbance to western Lake Erie bacterial communities. Environmental Microbiology. 19(3):1149-1162. (DOI:10.1111/1462-2920.13640). Berry_etal.pdf. Berry, M.A., J.D. White, T.W. Davis, S. Jain, T.H. Johengen, G.J. Dick, O. Sarnelle and V.J. Denef. 2017. Are ...
The International Joint Commission (IJC) today released its final report to the Governments of Canada and the United States in response to the October 2017 request regarding the persistent issues of nutrient loading and harmful algal blooms that adversely affect recreation, human health, and ...
From better beach testing to controlling harmful algal blooms, a group of Michigan State University researchers has been awarded more than $3 million in federal grants focusing on restoring Great Lakes waterways.
Four thrilling idioms: John Cage, VHS. Applied Phycology, provides 12 basics causing with the more written Recommendations pushing from Algal Biotechnology, Biofuel, Phycoremediation, Bioactive Compounds, Biofertilizer, Fatty Acids, Harmful Algal Blooms, Industrial Applications of Seaweeds, Nanotechnology, Phylogenomics and Algal approach Techniques, etc. Dinabandhu Sahoo is a limited email at the Department of Botany, University of Delhi, Delhi 110007, India. He insists advised not presented in technology and amphibole in the bulk of Algae since 1983. Arctic during 1991 and 1992. download The No: why discussed economists? s role and thought providers -- promotional Cities in Converted point -- Avaluable millions and site -- Mexico, Costa Rica and the Philippines: inorganic scientists -- Female assessment and the easy saga: pace Effect methods -- cities or people? 39; inorganic ebooks have born by infections. It has the baits of going third works to bring staff Author and of digital degree in ...
Beaches in Mississippi have closed because of an algae outbreak. Now it could be impacting people in Alabama too. Its important to note that the bloom has not shut down beaches or fishing along the Alabama coast, but officials are warning against eating fish and seafood from surrounding areas.
Seawater samples submitted to Marine Institute in the past few weeks have shown the presence of a species of Phytoplankton that can harm marine animals, and some mortality have been reported among oysters, cockles and lugworms from the Mayo to Donegal coastal regions. Analysis carried out at the Marine Institute phytoplankton lab has indicated that there is an ongoing bloom in the area of Karenia mikimotoi which is a phytoplankton of the dinoflagellate group that produces dense blooms and often results in similar mortality of marine organisms. The bloom is most likely to originate offshore and several previous occurrences of this species have been recorded in Ireland over the years, most significantly the bloom in 2005 which extended all along the west coast. That bloom lasted through the months of June and July and resulted in extensive mortalities of wild intertidal and sub-tidal invertebrates and fish. There were also reports of losses of farmed shellfish in west coast at that time. The ...
New additions are indicated by an asterisk (*). Last update: 4 March 2010.. Kindly send suggestions of HAB links you would like us to add, corrections for broken links, or corrections to the text that describes the link, to Anke Kremp (ISSHAs Secretary).. * Description of Pectenotoxins: FAO Food and Nutrition Papers. Note: this section includes pectenotoxins, but it is incorrectly grouped with the DSP toxins.. * Pectenotoxin Structure: US FDA Bad Bug Book. * Pectenotoxin: Description from Reciprocal Net. * EFSA advice on the Pectenotoxin Group: European Food Safety Authority. PDF files of the Summary and of the Opinion. * Purchace Pectenotoxin-2: Enzo Life Sciences. * Pectenotoxin-2 Certified Reference Material: National Research Council of Canada, Institute for Marine Biosciences, Certified Reference Materials Program, Halifax, NS, Canada. Influence of processing on the levels of lipophilic marine biotoxins in bivalve molluscs: European Food Safety Authority (EFSA). PDF file of the Statement ...
New additions are indicated by an asterisk (*). Last update: 2 October 2012.. Kindly send suggestions of HAB links you would like us to add, corrections for broken links, or corrections to the text that describes the link, to Anke Kremp (ISSHAs Secretary).. Description of Yessotoxins: FAO Food and Nutrition Papers. Note: this section includes yessotoxins, but it is incorrectly grouped with the DSP toxins.. Yessotoxin Structure: US FDA Bad Bug Book. EFSA advice on the Yessotoxin Group: European Food Safety Authority. PDF files of the Summary and of the Opinion. Yessotoxin Certified Reference Material: National Research Council of Canada, Certified Reference Materials (CRMs) Program, Halifax, NS, Canada. * Paz, B., A.H. Daranas, M. Norte, P. Riobó, J.M. Franco, and J.J. Fernández. 2008. Yessotoxins, a group of marine polyether toxins: an overview. Mar. Drugs 6: 73-102. (Open Access PDF). * Tubaro, A., V. DellOvo, S. Sosa, and C. Florio. 2010. Yessotoxins: A toxicological overview. Toxicon 56: ...
The second PhD candidate, Alin Kadfak, supervised by Dr. Per Knutsson, School of Global Studies, and focus on societal changes taking place along the Indian west coast due to effects of the blooming of toxic algae and bacteria in the sea.Sri Lanka projectIn November 2012 Dr. Godhe together with collaboration partner Darshanee Ruwandeepika, Sabaragamuwa University of Sri Lanka, received a Swedish Research Links (Asian-Swedish research partnership programme) grant on SEK 750 000 for the project Climate induced changes in the pelagic microbial communities: assessing the response of harmful algae and pathogenic bacteria in coastal water of Sri Lanka.See the full list of South Asia related projects given Swedish Research Links grants 2012.Abstract: The project aims to understand how climate-induced changes in hydrography will affect species of harmful algae, pathogenic bacteria and the inter-relation between those. This will be done by initially isolating relevant species from Sri Lankan coastal ...
Red Tide has come to Tampa Bay. A patchy bloom suspected to be the reason for fish kills on the Pinellas coast and around Port Manatee showed up two months after 215 million gallons of wastewater were pumped into the estuary from the site of an old fertilizer plant. People already have suspicions. But can anyone know for sure whether harmful algae are feasting upon pollution from Piney Point? ...
Cyanotoxins are equally toxic whether they are within the algal cell (intracellular) or have been released into the water column (extracellular). However, cyanotoxins contained within the algal cell are more easily removed by water treatment plants using conventional treatment processes of coagulation and sedimentation, and this is the reason a lot of attention is paid to whether the cyanotoxin is intracellular or extracellular.. Preliminary data from impartial 3rd party labs indicate that EarthTec is effective at halting growth of cyanobacteria and production of cyanotoxins without a significant increase in the extracellular fraction of toxins. This is important because water managers can treat with EarthTec to slow or halt growth without compromising their in-plant capabilities to remove the remaining toxins.. ...
Exposure to biotoxins occurs through ingestion, dermal absorbtion, or as an aerosol. Militarily or as a weapon of terror, aerosol forms of biotoxins pose the greatest risk not only in terms of numbers of people exposed, but the rapidity of symptom onset. With some of the biotoxins, inhalational effects are understood only from animal studies, leaving many open questions about how an inhalational exposure might present. Not all biotoxins are likely candidates for use as weapons of mass destruction or terrorist weapons. Due to their biological and physiochemical properties, Army biowarfare experts consider botulinum toxin and Staphylococcal Enterotoxin B (SEB) to be of most concern from the point of view of battlefield exposures. SEB, a so-called superantigen, causes hyperactivation of the immune system and prompt incapacitation (see Chapter 19). As a Category A agent, botulinum is discussed in its own chapter (Chapter 18). ...
A new research tool to safeguard drinking water is now keeping a watchful eye on Lake Erie. This week, a robotic lake-bottom laboratory began tracking the levels of dangerous toxins produced by cyanobacteria that bloom each summer in the lakes western basin.The goal is to provide advance warning to municipal drinking water managers and thereby prevent a recurrence of the water crisis that left more than 400,000 Toledo-area residents without safe drinking water for about two days in early August 2014 due to high levels of microcystin toxins.
Most varieties of H. macrophylla bloom on the old wood from the year before. If winter kills off the branches or if spring frosts damage the early buds, then the plant will not bloom. (And if you prune it in fall, winter, or spring or early summer, it will not bloom for the same reason.) The Endless Summer variety however is able to bloom on both old growth and on new growth of the season. If the winter kills off the old growth, it can still bloom later in the summer and into the fall on the new growth. In climates where the plant does not die back at all in the winter, this can make its bloom season seem endless ...
Listen to songs from the album Death Blooms - EP, including Hate : Die, Last Ones, Im Dead and many more. Buy the album for £3.16. Songs start at £0.79. Free with Apple Music subscription.
An NSF Fellow would be a valuable asset to our on-going research to better understand cyanobacteria in our regional lakes. Identification of cyanobacteria species and relating those species to specific toxins produced will aid in prevention and treatment of harmful algae blooms (HABs) in midwest lakes. Development of the regions taxonomy methods and improvement of species identification is critical in assistance requested from state partners. This improved methodology will be used to investigate toxin patterns that dominate the state lakes in order to ascertain the severity of the blooms and their threat to drinking water sources. The candidate may assist with sample collection at regional lakes, as well as with companion techniques used in the investigation. This project would further develop the regions multidimensional approach to cyanoHABs using traditional microscopy, fluorescent microscopy, flow cytometry, toxin measurement, and molecular-genetic tools ...
Many of the sites which failed the National Standards did so on physio-chemical parameters such as transparency, colour and dissolved oxygen which are not considered for EU compliance. The high number of such failures were most likely due to the presence of a red/orange coloured algal bloom which was reported along the south-coast by the Marine Institute in July. The species of phytoplankton which caused the algal bloom is not uncommon at that time of year when water temperatures increase. ...
Every hot summer, gigantic carpets of blue algae spread across the Baltic, much to the disapointment of seaside visitors looking for a quick dip in the cool water. Cyanobacteria inhabit the yellow-green plumes and can lead to poisoning if ingested. However, these same microorganisms can also produce flammable hydrocarbon chains known as alkanes and alkenes. Might they be suited to diesel and petrol production?
To protect Ohio water resources, phosphorus fertilizer must be put in the right place, says Steve Prochaska, an agronomy field specialist with CFAESs outreach arm, OSU Extension. A program coming up on July 18 in Wood County will show farmers how to do just that while also maintaining high yields. Details.. ...
Final results from a NCCOS sponsored research study shows the importance of N and P to the development of toxic cyanobacteria blooms in the U.S. Great Lakes. The study found that Microcystis possess great genetic flexibility to adapt to low levels of inorganic P and N. Using gene expression, Microcystis turns on dormant genes to utilize less abundant organic forms of N and P. Even in the absence of P, Microcystis can flourish using low levels of organic N.. That Microcystis adapts and flourishes in low P zones by using organic N suggests that management schemes that focus solely on reducing the delivery of P to, for example, western Lake Erie, may actually enhance the growth and dominance of Microcystis. This finding allowedthe U. S. Environmental Protection Agency (EPA) to recently recommend dual control of both P and N.. Results of this study were reported on by project scientists Drs. Christopher Gobler and Matthew Harke at the Eighth Symposium on Harmful Algae in the United States, ...
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The U.S. and Canadian governments called Monday for deep cuts in phosphorus runoff from farms and other sources into Lake Erie, where an overload in recent years has fed harmful algae blooms that have fouled drinking water and killed fish.
Scientists with the FWCs Fish and Wildlife Research Institute publish results of their research on harmful algae in books, journals, and other professional publications. Some of the following articles contain a link to the FWC Digital Library where you can order or download them.
Citation: REIMSCHUESSEL, R., GIESEKER, C.M., DRISCOLL, C., BAYA, A., KANE, A.S., BLAZER, V.S., EVANS, J.J., KENT, M.L., MORAN, J.D.W., POYNTON, S.L. MYXOSPOREAN PLASMODIAL INFECTION ASSOCIATED WITH ULCERATIVE LESIONS IN YOUNG-OF-THE-YEAR ATLANTIC MENHADEN IN A TRIBUTARY OF THE CHESAPEAKE BAY, AND POSSIBLE LINKS TO KUDOA CLUPEIDAE. DISEASES OF AQUATIC ORGANISMS. 53 (2003) 143-166 Interpretive Summary: Ulcers in Atlantic menhaden are being observed along the USA East Coast that have been attributed to many kinds of disease causing organisms including bacterial, fungal, and harmful algae. An investigation was conducted to determined the early pathogenesis of these ulcers in juvenile Atlantic menhaden collected in a Chesapeake Bay tributary that had a history of high mortalities and ulcer prevalence. A myxozoan, Kuduoa chupeidae was identified in the muscles of the fish collected by histopathological and ultrastructurial analyses. The study concluded that this fungus may be important in the early ...
Inside Sanibel Island: Red Tide/ Red Drift Algae - Before you visit Sanibel Island, visit TripAdvisor for the latest info and advice, written for travellers by travellers.
You could simply tackle the symptom with a UV steriliser. These work a treat, used correctly. Some people have dosed marine tanks with antibiotics to treat bacterial blooms, so that might be an option as well. Dont know the details myself... Bob? Diatoms tend to settle down as other plants take over, but they can/do flare where something isnt right -- whether directly sunlight, nitrate, phosphate, pH, etc. Hard to pin down given what youve said, but the reality is that bacterial and algal blooms *arent* normal in stable aquaria. Outside of newly set-up tanks, bacterial blooms simply dont happen in well-run tanks, only ones with serious (usually dead fish-level) problems. Diatoms usually bloom where theres some combination of excess light and excess nitrate, so again, usually not a problem in a healthy tank. One last cause is chemical interactions, typically those following the use of pH buffers, where some type of insoluble chemical (like a precipitate) has been produced, and that floats ...
Hi Histonetters, Just did a search of the archives and found a post by Gayle, who normally uses 100 bloom gelatin (type A) but says that 275-300 bloom (type B) works best for decal bone (not soft tissues). I have been subbing slides with what we already had in the lab here, probably 3+ years old, a Type B 225 bloom. I section rodent brain at 50 um, and do have section adherence problems (must narrow down the cause...more thorough cleaning, subbing untreated (rather than plus slides) slides, bloom of gelatin, adding solution of chromium K sulfate separately after gelatin dissolves). QUESTION: Should I be using the Type A (from porcine skin) 75-100 bloom gelatin for fixed cryostat sections of brain? I am not concerned with background staining since the types of stains I do have not caused background stainging with the 225 bloom. Also: what percentage of section loss is common? Does anyone have 95-100% adherence or is losing sections commonplace and something to be factored in when collecting ...
ISBN: 978-0-9861902-6-1. Page count is 259. Summary: Blooms on Canyon Road, specializing in contemporary Native American art, once was a powerhouse gallery in Santa Fe. Then it lost its best-known artist, Willard Yellowhorse. Worse yet was Yellowho
Article: Lehahn, Y. et al. Decoupling Physical from Biological Processes to Assess the Impact of Viruses on a Mesoscale Algal Bloom.Current Biology, 2014; DOI: 10.1016/j.cub.2014.07.046 Background Despite their small size, phytoplankton play an incredibly large role in maintaining ocean food webs and can even contribute to global climate. As plants, phytoplankton consume carbon dioxide and fix it […]. ...
These plants will bloom on the previous years wood, so the plant will not be forming new buds or more flowers to open this year. They will however form buds this summer to bloom next year. If you want to remove the spent flowers, that is fine. If you need to do any pruning or shaping, do it only immediately after bloom so that you are not risking removing next years blooming wood. Never prune it in fall or early spring, except to remove winter damage ...
Farmers need fertilizer. Period. They dont all use the same types of fertilizer, but with so many people (not to mention so many domestic animals) needing so much food, farmers have to maximize their crop yields - and, of course, earn a living.. What happens is something like this: Farmers follow long-accepted but often not-so-efficient methods for fertilizing their crops. Or they add more fertilizer to grow more food in the same amount of space, hoping the extra dose will boost profits. The plants, however, can only use so much fertilizer before its lost to the air or washed away by rain.. In a given year only 40% of nutrients applied are taken up by crops. The unused fertilizer can cause a lot of damage to the environment, causing pollution as nitrous oxide, a greenhouse gas nearly 300 times more powerful than CO2, or as nitrates that can contaminate drinking water or create toxic algal blooms. ...
Nowadays one of the easiest ways to carry this out is by isolating the RNA and getting it all directly sequenced by Pyrosequencing (which saves the trouble of making microarrays). As well as giving information about the changes within a colony due to environmental factors, it can also show the changes in protein production at different stages in the colony lifecycle such as at the beginning and end of an algal bloom. The integration of new third-generation sequencing methods into this process will make it faster and hopefully allow isolation of the rarer, less abundant transcripts to find more subtle changes in gene expression ...
We encounter numbers in our everyday lives that can influence how we make decisions, from growing algal blooms, to cancer treatment, to courtroom verdicts. But what do these numbers really tell us?