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428 results for “zooplankton”
Data from: No effect of realistic concentrations of polyester microplastic fibers on freshwater zooplankton communities
<p>Zooplankton are a conduit of energy from autotrophic phytoplankton to higher trophic levels, and they can be a primary point of entry of microplastics into the aquatic food chain. Investigating how zooplankton communities are affected by microplastic pollution is thus a key step towards understanding ecosystem-level effects of these global and ubiquitous contaminants. Although the number of studies investigating the biological effects of microplastics has grown exponentially in the last decade, the majority have used controlled laboratory experiments to quantify the impacts of microplastics on individual species. Given that all organisms live in multi-species communities in nature, here we use an outdoor 1130L mesocosm experiment to investigate the effects of microplastic exposure on natural assemblages of zooplankton. We endeavored to simulate an environmentally relevant exposure scenario by manually creating ~270,000 0.015mm x 1-1.5mm polyester fibers and inoculating mesocosms with zero, low (10 particles/L) or high (50 particles/L) concentrations. We recorded zooplankton abundance and community composition three times throughout the 12-week study. We found no effect of microplastics on zooplankton abundance, Shannon diversity, or Pielou's evenness. NMDS plots also revealed no effects of microplastics on zooplankton community composition. Our study provides a necessary and realistic baseline upon which future studies can build. Because numerous other stressors faced by zooplankton (e.g. food limitation, eutrophication, warming temperatures, pesticides) are likely to exacerbate the effects of microplastics, we caution against concluding that polyester microfibers will always have no effect on zooplankton communities. Instead, we encourage future studies to investigate the triple threats of habitat degradation, climate warming, and microplastic pollution on zooplankton community health.</p>
Heatwave-mediated decreases in phytoplankton quality negatively affect zooplankton productivity
<ol> <li>Climate change is expected to increase the frequency of extreme temperature events. The effect of heatwaves on phytoplankton is of particular concern because they are a key source of C, N, P, and essential fatty acids to aquatic ecosystems. Laboratory studies have demonstrated that phytoplankton grown at warmer temperatures are a lower-quality food source, but how heatwaves affect phytoplankton quality at the community scale is currently unclear.</li> <li>Here we address this knowledge gap by growing natural assemblages of freshwater phytoplankton at 'ambient', 'constant warming', or 'heatwave' conditions. We next fed these phytoplankton communities to natural assemblages of zooplankton to test the prediction that zooplankton that consume heatwave-exposed phytoplankton will exhibit reductions in biomass.</li> <li>Our experiment demonstrated that zooplankton that consumed 'heatwave' phytoplankton attained lower community biomass than those fed 'constant warming' or 'ambient' phytoplankton. Additionally, despite receiving similar total heat input, phytoplankton exposed to 'heatwave' conditions contained lower C, N, P, and fatty acid concentrations compare to phytoplankton grown in 'constant warming' conditions.</li> <li>Correlations between zooplankton biomass and all measured phytoplankton traits revealed that decreases in zooplankton biomass were best explained by low quantities of C, N, and monounsaturated fatty acids in 'heatwave' phytoplankton.</li> <li>Our study demonstrates that the effects of heatwaves on phytoplankton quality are clearly distinct from those caused by constant warming temperatures, and that heatwave-mediated decreases in resource quality have immediate effects on consumer productivity. </li> </ol>
Figure 1. The map illustrates 142 in Taxonomy, distribution, and ecology of crustacean zooplankton in trough waters of Ankara (Turkey)
Figure 1. The map illustrates 142 trough sites sampled in Ankara.
Figure 5. a in Taxonomy, distribution, and ecology of crustacean zooplankton in trough waters of Ankara (Turkey)
Figure 5. a) trough with 4 segments made of cement (photo taken 23 June 2011).
Figure 5. c in Taxonomy, distribution, and ecology of crustacean zooplankton in trough waters of Ankara (Turkey)
Figure 5. c) trough made of cement (photo taken 24 June 2011).
Temporal and spatial variation of zooplankton in relation to environmental variables in the upper Santos estuary, São Paulo, Brazil
<p><span>Zooplankton samples were collected through oblique trawls with a 200 µm net with a flow meter during low tide, at 4 sampling sites with different degrees of salinity in the upper Santos estuary, in 28 campaigns carried out between 2014 and 2023, to analyze the spatial and temporal variations in the structure and abundance of zooplankton in relation to environmental variables using data from a long-term monitoring, in this way, contributing to the update of knowledge about the zooplankton community of the Santos estuary. </span></p>
Phenotypic but no genetic adaptation in zooplankton 24 years after an abrupt +10°C climate change
<p>Data and scripts for Pais-Costa et al 2022</p>
Fig. 11 in Distribution And Diversity Of Gelatinous Zooplankton In The South Eastern Arabian Sea, Kanyakumari To Off Kollam
Fig. 11. Eudoxoides mitra.
Fig. 9 in Distribution And Diversity Of Gelatinous Zooplankton In The South Eastern Arabian Sea, Kanyakumari To Off Kollam
Fig. 9. Salpa fusiformis.
Fig. 10 in Distribution And Diversity Of Gelatinous Zooplankton In The South Eastern Arabian Sea, Kanyakumari To Off Kollam
Fig. 10. Thalia democratica.
Fig. 4 in Distribution And Diversity Of Gelatinous Zooplankton In The South Eastern Arabian Sea, Kanyakumari To Off Kollam
Fig. 4. Diphyes dispar.
Fig. 6 in Distribution And Diversity Of Gelatinous Zooplankton In The South Eastern Arabian Sea, Kanyakumari To Off Kollam
Fig. 6. Liriope tetraphylla.
Fig. 8 in Distribution And Diversity Of Gelatinous Zooplankton In The South Eastern Arabian Sea, Kanyakumari To Off Kollam
Fig. 8. Pleurobrachia pileus.
Fig. 7 in Distribution And Diversity Of Gelatinous Zooplankton In The South Eastern Arabian Sea, Kanyakumari To Off Kollam
Fig. 7. Oikopleura dioica
Fig. 1 in Symbiont Fauna Of Freshwater Zooplankton In Several Water Bodies Of The Dnipro River Basin
Fig. 1. Symbionts of fresh-water zooplankton: A — abdomen with zoo-
Drivers of zooplankton dispersal in a pond metacommunity
<p>Dispersal success is integral to survival of species in metacommunities. For species that disperse passively like zooplankton, reliance on dispersal vectors is paramount for colonization of water bodies. Zooplankton species engage in dispersal in time (resting eggs) and space (overland). For dispersal in time, resting eggs are deposited in the sediment during adverse conditions and recolonize aquatic systems when beneficial conditions resume</p>
Data from: Terrigenous subsidies in lakes support zooplankton production mainly via a green food chain and not the brown food chain
<p><span>Terrestrial organic matter (t-OM) has been recognized as an important cross-boundary subsidy to aquatic ecosystems. However, recent evidence has shown that t-OM contributes little to promote secondary production in lakes because it is low quality food for aquatic consumers. To resolve this conflict, we performed a field experiment using leaf litter as t-OM. In the experiment, we monitored zooplankton biomass in enclosures with and without addition of leaf litter under shaded and unshaded conditions and assessed food web changes with stable isotope analyses. We then examined whether or not leaf litter indeed stimulates lake secondary production and, if it does, which food chain, the detritus-originated food chain ("brown" food chain) or the algae-originated food chain ("green" food chain), contributes more to this increase. Analyses with stable isotopes showed a substantial importance of t-OM in supporting the secondary production under ambient lake conditions. However, addition of the leaf litter increased the zooplankton biomass under unshaded conditions but not under shaded conditions. We found that phosphorus was leached from leaf litter at much faster rate than organic carbon and nitrogen despite its low content in the leaf litter. These results showed that leaf litter stimulated the increase of zooplankton biomass mainly through the green food chain rather than through the brown food chain, because the leaf litter supplied limiting nutrients (i.e., phosphorus) for primary producers. Our results indicate that the functional stoichiometry of the subsidized organic matter plays a crucial role in determining the relative importance of brown and green food chains in promoting production at higher trophic levels in recipient ecosystems.</span></p>
Fig. 12 in Distribution And Diversity Of Gelatinous Zooplankton In The South Eastern Arabian Sea, Kanyakumari To Off Kollam
Fig. 12. Doliolum gegenbauri.
Fig. 5 in Distribution And Diversity Of Gelatinous Zooplankton In The South Eastern Arabian Sea, Kanyakumari To Off Kollam
Fig. 5. Lensia subtiloides.
NOAA COPEPOD zooplankton biomass
<p><strong>This is a global dataset of standardised zooplankton biomass derived from the Coastal and Oceanic Plankton Ecology, Production, and Observation Database (COPEPOD)</strong>.</p>
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.