• Since organisms in the plankton are highly interconnected and carbonate synthesizing species have a good preservation state in the Atlantic Ocean, the diversity distribution pattern of planktonic foraminifera from 1741 core-top surface sediment samples (expanded ForCenS database) provides a case study to comprehend centennial to decadal time-averaged diversity patterns at pre-1970 CE times, the tempo of the substantial increase in tropospheric warming. (frontiersin.org)
  • In conclusion, we provide statistical proof that energy (SST), food supply (Chl-a), and currents (EKE) are the main environmental drivers shaping planktonic foraminifera diversity in the Atlantic ocean and define the associated thresholds for species change on those variables. (frontiersin.org)
  • Planktonic foraminifera are free-floating protozoa that produce calcium carbonate shells. (frontiersin.org)
  • Planktonic foraminifera are widely used in biostratigraphic, palaeoceanographic and evolutionary studies, but the strength of many study conclusions could be weakened if taxonomic identifications are not reproducible by different workers. (open.ac.uk)
  • In this study, to assess the relative importance of a range of possible reasons for among-worker disagreement in identification, 100 specimens of 26 species of macroperforate planktonic foraminifera were selected from a core-top site in the subtropical Pacific Ocean. (open.ac.uk)
  • Twenty-three scientists at different career stages - including some with only a few days experience of planktonic foraminifera - were asked to identify each specimen to species level, and to indicate their confidence in each identification. (open.ac.uk)
  • Here, we report 27 radiocarbon dates of planktonic foraminifera (24 dates for Orbulina universa and 3 for Trilobatus sacculifer ) collected from International Ocean Discovery Program Expedition 361 (Southern African Climates) Site U1474 in the Natal Valley. (iodp.org)
  • Planktonic foraminifera shells (which consist of calcium carbonate) preserved in marine sediment cores are a reliable recorder of inorganic carbon dissolved in surface seawater, and thus are widely used to obtain ages model of the cores after 14 C marine reservoir correction, which is required because of the relatively slow carbon cycle in the ocean. (iodp.org)
  • We used electron probe microanalysis (EPMA) to investigate intra-test Mg distributions in the fossil tests of two species of planktonic foraminifera from the extinct muricate mixed-layer-dwelling genus Morozovella, commonly used in Paleogene sea surface temperature reconstructions. (cardiff.ac.uk)
  • Age Effects in the Extinction of Planktonic Foraminifera: A New Look at Van Valen's Red Queen Hypothesis. (fsu.edu)
  • Some of the more recent approaches to this problem using Planktonic Foraminifera (Foram) extinction data include Weibull and Exponential modeling (Parker and Arnold, 1997), and Cox proportional hazards modeling (Doran et al. (fsu.edu)
  • This study reports on species diversity and distribution of planktonic foraminifera (PF) at the Barents Sea Opening (BSO). (ifremer.fr)
  • The Paleogene Planktonic Foraminifera Working Group has been active over 25 years and dealing with comprehensive revisions to the taxonomy and biostratigraphy of Paleogene taxa. (paleogene.org)
  • Atlases on Paleocene (Olsson and others, 1999), Eocene (Pearson and others, 2006) and Oligocene planktonic foraminifera (Wade et al. (paleogene.org)
  • They aim to establish a clear and workable taxonomy for all Paleogene planktonic foraminifera, including SEM images of holotypes and paratypes, some of which have never been imaged before. (paleogene.org)
  • The Atlas of Oligocene Planktonic Foraminifera contains over 1600 SEM images and is invaluable to anyone undertaking Oligocene and early Miocene planktonic foraminiferal biostratigraphy or geochemistry. (paleogene.org)
  • Atlas of Paleocene Planktonic Foraminifera. (paleogene.org)
  • The susceptibility of planktonic bacteria was determined using the broth microdilution method and by plotting bacterial growth. (ehu.eus)
  • Chemical interaction with matrix molecules is hypothesized, based on SEM images and considering the low or absent anti-microbial activity on planktonic bacteria showed by flow cytometry. (frontiersin.org)
  • Many antimicrobial agents that are effective against planktonic cells turn out to be ineffective against the same bacteria growing in a biofilm state 9,10 . (bvsalud.org)
  • [ 4 ] In contrast to planktonic, or free-floating, bacteria, microbes in the chronic wound bed are believed to exist mainly in biofilm communities, which attach to the wound surface and exist in microcolonies enclosed in a protective matrix of polysaccharide material. (medscape.com)
  • [ 8-10 ] Biofilms differ genotypically and phenotypically from planktonic bacteria, resulting in higher tolerance to antibiotics and to the host immune response. (medscape.com)
  • The distribution and dynamics of planktonic rotifers, at various spatial and temporal scales, were investigated in lakes of the North Island, New Zealand. (waikato.ac.nz)
  • Three strains of the chain-forming diatom Skeletonema marinoi, differing in their production of polyunsaturated aldehydes (PUA) and nutritional food components, were used in experiments on feeding, egg production, hatching success, pellet production, and behavior of three common planktonic copepods: Acartia tonsa, Pseudocalanus elongatus, and Temora longicornis. (harvard.edu)
  • Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). (obs-banyuls.fr)
  • The three holes at Site 1258 yielded primarily middle Eocene-early Albian marine sediments that contain planktonic foraminifers, calcareous nannofossils, and radiolarians in abundances and states of preservation that vary widely with lithology and sediment induration. (tamu.edu)
  • The preservation and abundance of the Cenomanian calcareous microfossils is better than at the other Leg 207 sites, although these remain spotty in distribution, particularly for the planktonic foraminifers. (tamu.edu)
  • Clay-rich beds of early Albian age below these shales yielded some of the best-preserved microfossils at the site, including nannofossils pristine in appearance and "glassy" planktonic foraminifers that compare well visually with Holocene assemblages. (tamu.edu)
  • Planktonic and biofilm cells also exhibit different susceptibilities to a certain antimicrobial concentration. (bvsalud.org)
  • Human whole blood was stimulated with biofilms, biofilm-supernatants, planktonic cells, and whole cells. (opendentistryjournal.com)
  • Biofilms and planktonic cultures induced specific cytokines that were not induced by whole cells or biofilm supernatants. (opendentistryjournal.com)
  • The effect of light and nutrients on a temperate water planktonic microbial community was investigated via experiments conducted in Scottish coastal waters during summer. (uhi.ac.uk)
  • Special attention is paid to the release of CO 2 from planktonic microbial processes and on the transfer of organic carbon through aquatic food webs. (lu.se)
  • Many planktonic species are cosmopolitan, that is, can be found everywhere across the global ocean ( Finlay, 2002 ) as they are transported over long distances by ocean currents (e.g. (frontiersin.org)
  • We found that while Ebp are only expressed on a subset of cells, when Ebp and AS are expressed on the same cells, pili interfere with AS-mediated clumping and impede AS-mediated conjugative plasmid transfer during planktonic growth. (nih.gov)
  • The main virulence factor of C. albicans is the ability to transform from planktonic yeast-form cells into a filamentous form (hyphae or pseudohyphae), with the subsequent formation of biofilm. (lu.se)
  • Our hypothesis is that certain polyhydroxylated carboxylic acids, that may serve as an alternative carbohydrate source and at the same time lower the pH, function as an indicator of a nutrient-rich environment for C. albicans, which favors planktonic cells over hyphae, and thus diminish the formation of biofilm. (lu.se)
  • There are more than 200 described species of marine planktonic ostracods, many of which (especially conspecific species) can be identified only by microscopic examination and dissection of fragile morphological characters. (nerc.ac.uk)
  • Results are reported from analysis of 210 specimens of 78 species of marine planktonic ostracods, including two novel species, and 51 species for which barcodes have not been previously published. (nerc.ac.uk)
  • Based on taxonomically and geographically extensive sampling and analysis (albeit with small sample sizes), the COI barcode region was shown to be a valuable character for discrimination, recognition, identification, and discovery of species of marine planktonic ostracods. (nerc.ac.uk)
  • However, geographic variability of simple community parameters of a planktonic group has been found to be stable enough in time and space, to reflect the spatial characteristics that approach biogeographical distributions ( Angel, 1991 ). (frontiersin.org)
  • The response of a planktonic community to sudden mixing conditions in temperate coastal waters: importance of light regime and nutrient enrichment. (uhi.ac.uk)
  • Inspite of the importance of the reservoir, information on the planktonic community and physico-chemical water quality are scarce. (actalb.org)
  • Quack and Wallace (2003) estimated that the annual global flux of bromoform of 3-22 Gmol/year with the main source being sea-to-air emissions from macroalgal and planktonic bromoform production. (cdc.gov)
  • Concerning the mesopelagic community's microscopic fraction, previous reports have shown a stratification of planktonic communities by the water column. (nature.com)
  • The overall aim was to provide a better understanding of the relative influence of various environmental gradients in determining the composition of planktonic rotifer communities in New Zealand. (waikato.ac.nz)
  • Pili interfere with aggregation substance-mediated clumping and plasmid transfer under planktonic conditions, whereas the two adhesins structurally complement one another during biofilm development. (nih.gov)
  • Free and Nanoencapsulated Tobramycin: Effects on Planktonic and Biofilm Forms of Pseudomonas. (ehu.eus)
  • Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. (lu.se)
  • Incubation of sediments did not result in the emergence of all the planktonic species found in the seasonal study. (waikato.ac.nz)
  • Copper enrichment in nodules is found to be due to the concentration of this element by planktonic organisms which are limited to equatorial regions. (cdc.gov)
  • The planktonic foraminiferal genus, Huberella n.gen., of the Family Heterohelicidae Cushman, 1927, is described from the Turonian (Upper Cretaceous) of the western North Atlantic and equatorial Pacific. (micropress.org)
  • Planktonic foraminiferal records from Site 1083 (ODP Leg 175) were used to investigate changes in surface water conditions in the Northern Benguela Region over the past 450 ky. (vu.nl)
  • Thirty planktonic foraminiferal species were distinguished, and a detailed study of the Site 517 stratigraphy was made. (eudat.eu)
  • Planktonic foraminiferal calcification intensity, reflected by shell wall thickness, has been hypothesized to covary with the carbonate chemistry of seawater. (sc.edu)
  • This chapter deals with the luminescent species of planktonic annelids such as Tomopteris spp and syllid larva, the emission maxima in observed species of Tomopteris, the description of luminescent species of planktonic annelids and their mechanism of bioluminescence. (benthamscience.com)
  • The assemblages of planktonic foraminifera are dominated by four species: sinistral coiling Neogloboquadrina pachyderma, dextral coiling N. pachyderma, Globigerina bulloides and Globorotalia inflata. (vu.nl)
  • To examine this possibility, we performed CO 2 manipulation experiments under a P-limited condition with a planktonic herbivore, Daphnia, and three algal species, Scenedesmus obliquus (green algae), Cyclotella sp. (elsevierpure.com)
  • In numerous bacterial species this secondary messenger plays a key role in controlling the shift between sessile and planktonic lifestyle. (nature.com)
  • In addition, it has a large offset in its stable carbon and oxygen isotopic compositions compared to other planktonic foraminifer species, and also that predicted from seawater equilibrium. (copernicus.org)
  • Wilkinson, Ian P. . 2005 Efficacy of δ18O data from Pliocene planktonic foraminifer calcite for spatial sea surface temperature reconstruction : comparison with a fully coupled ocean-atmosphere GCM and fossil assemblage data for the mid-Pliocene. (nerc.ac.uk)
  • Sea surface temperature (SST) estimates using the δ18O composition of fossil planktonic foraminifer calcite, within the time slice 3.12 to 3.05 Ma (Pliocene, Kaena Subchron - C2An1r) are assessed for nine Atlantic Ocean sites. (nerc.ac.uk)
  • b) secondary calcite with higher δ18O formed in the planktonic foraminifer tests in sea bottom pore waters. (nerc.ac.uk)
  • We investigated the possibility of bacterial symbiosis in Globigerina bulloides , a palaeoceanographically important, planktonic foraminifer. (copernicus.org)
  • This dataset contains the pictures used for morphometric measurements, as well as the elemental compositon and production rates data, of planktonic Rhizaria. (seanoe.org)
  • Bioluminescent Planktonic Marine Annelids, Bioluminescent Marine Plankton (2022) 1: 142. (benthamscience.com)
  • 20. Unexpected diversity of bioluminescence in planktonic worms. (nih.gov)
  • Bias analysis: individual shell area measurements of planktonic foraminifera specimens used to assess the biases in the Buckley Collection (Fig. 3 in the paper). (nhm.ac.uk)
  • This suggests that Synechococcus is an endobiont of G. bulloides type IId, which is the first report of a bacterial endobiont in the planktonic foraminifera. (copernicus.org)
  • 2023). Elemental content allometries and silicon uptake rates of planktonic Rhizaria: Insights into their ecology and role in biogeochemical cycles. (seanoe.org)
  • In particular, deglaciations are interpreted by identifying times of increased abundance of warm water planktonic foraminifera, which would presumably represent times of climatic warming and input of (lower salinity) meltwater spikes. (confex.com)
  • Planktonic algae, otherwise known as phytoplankton, are microscopic, single celled, free floating algae that can exist wherever the sun penetrates. (tamu.edu)
  • Planktonic algae thrive under sunny conditions at water temperatures greater than 60°F, and contributes to water's greenish tint. (tamu.edu)
  • Typically, planktonic algae are considered desirable as they shade the pond bottom which suppresses the establishment of rooted aquatic plants, are the foundation of a pond's food chain by providing food for zooplankton and larval fishes, and provides 80% of the oxygen in the water. (tamu.edu)
  • However, an overabundance of planktonic algae, called "Blooms" - particularly their eventual death - can lead oxygen depletions, and eventually fish kills. (tamu.edu)
  • Planktonic algae can die-off naturally and rapidly due to cloudy days and cold snaps during rain events or colder months. (tamu.edu)
  • Samples that are sent in to the Aquatics Diagnostic Laboratory after a planktonic algae die-off, may contain these dead, discolored cells, which are confirmed through microscopic examination. (tamu.edu)
  • Negative effects of a planktonic algae die-off can be minimized by stopping all fish feeding until spring when the water temperatures are 60°F or higher. (tamu.edu)
  • If you are concerned your planktonic algae bloom density is problematic, a secchi disk can be used to measure water clarity, which can help indicate planktonic algae levels. (tamu.edu)
  • For more pictures and information on planktonic algae, please read Managing and Controlling Algae in Pond and visit AquaPlant.tamu.edu . (tamu.edu)
  • Diatom -- Any of a class of minute planktonic unicellular or colonial algae with silicified skeletons that form diatomite (diatomaceous earth. (nih.gov)
  • Planktonic foraminifera organic carbon isotopes as archives of upper ocean carbon cycling. (liverpool.ac.uk)
  • Planktonic responses to several levels of HC contamination are studied for two physically contrasting SJG environments, a tidally well-mixed water column and a stratified water column. (tos.org)
  • Efficacy was compared to a non-challenged planktonic approach, as well as with increased substance volume over a prolonged exposure (up to 72 h). (frontiersin.org)
  • Motivated by this, we explored the effect of copper enrichment on such regime shifts in planktonic systems. (uu.nl)
  • Copper enrichment in nodules is found to be due to the concentration of this element by planktonic organisms which are limited to equatorial regions. (cdc.gov)
  • Seasonal dynamics of the planktonic community in Lake-Druzhby, Princess-Elizabeth-Land, Eastern Antarctica. (lancs.ac.uk)
  • This privacy statement explains how Planktonic collects, uses, and processes personal data from visitors to and customers of Planktonic. (planktonic.no)
  • Many planktonic ecosystem models were developed to resolve major processes so that flux estimates can be derived from numerical simulations. (geomar.de)
  • The purpose of our study is to investigate the Holocene-Late Pleistocene planktonic foraminifera record of MD02-2560 to (a) develop an age model for the upper 10 meters of the core, and to (b) interpret changes in the paleoenvironment during that time. (confex.com)
  • 2016). Calcification of the planktonic foraminiferaGlobigerina bulloidesand carbonate ion concentration: Results from the Santa Barbara Basin. (sc.edu)
  • We used RNA sequencing technology to compare stationary phase planktonic cells with mature biofilm, cultured with and without oxygen. (bgu.ac.il)
  • Previous studies have shown that the history of glaciation and deglaciation of the southern area of the Laurentide ice can be reconstructed from the planktonic foraminifera record of the sediments of the Gulf of Mexico. (confex.com)
  • Postdoc (m/f/d) 'Disentangling the impact of temperature and light exposure in planktonic microbi. (nature.com)
  • Annette Berg is, according to the Personal Data Act and the EU's General Data Protection Regulation (GDPR), responsible for the processing of personal data by Planktonic. (planktonic.no)
  • Access to personal data is limited to Planktonic. (planktonic.no)
  • Planktonic is also required to provide access to documentation and personal data in accordance with the Freedom of Information Act (i.e. a disclosure of personal data). (planktonic.no)
  • When does Planktonic collect personal data? (planktonic.no)
  • Central difficulties are (1) planktonic ecosystem models are imperfect and (2) data are often too sparse to constrain all model parameters. (geomar.de)
  • Many studies have described the response of the facultative anaerobe, Escherichia coli, to anaerobic conditions, yet they all investigated free-living (planktonic) cells because attempts to cultivate anaerobic E. coli biofilm were mostly unsuccessful. (bgu.ac.il)
  • in planktonic cells. (medscape.com)
  • and Yan, N. D., "Natural changes in the planktonic rotifera of a small acid lake near Sudbury, Ontario following water quality improvements" (1986). (uwindsor.ca)
  • Quack and Wallace (2003) estimated that the annual global flux of bromoform of 3-22 Gmol/year with the main source being sea-to-air emissions from macroalgal and planktonic bromoform production. (cdc.gov)
  • Le présent article examine ces facteurs, en s'attachant plus particulièrement au sérotype nouvellement identifié de Vibrio cholerae qui a provoqué des épidémies en Inde et au Bangladesh. (who.int)
  • Our results suggest that gene expression patterns significantly differ between biofilm and planktonic cultures cultivated under the same oxygenic conditions. (bgu.ac.il)
  • we will test this via planktonic foraminifera analysis. (confex.com)