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118 results for “Eutrophication”
Data from: Eutrophication and predation risk interact to affect sexual trait expression and mating success
Sexual traits are especially sensitive to low food resources. Other environmental parameters (e.g., predation) should also affect sexual trait expression by favoring investment in viability traits rather than sexual traits. We know surprisingly little about how predators alter investment in sexual traits, or how predator and resource environments interact to affect sexual trait investment. We explored how increasing phosphorous (P) availability, at a level mimicking cultural eutrophication, affects the development of sexual, non-sexual, and viability traits of amphipods in the presence and absence of predators. Sexual traits and growth were hyper-sensitive to low P compared to non-sexual traits. However, a key sexual trait responded to low P only when predator cues were absent. Furthermore, investment tradeoffs between sexual traits and growth only occurred when P was low. The phenotypic changes caused by predator cues and increased P availability resulted in higher male mating success. Thus, eutrophication not only affects sexual trait expression but also masks the tradeoff between traits with similar P demand. Sensitivity of sexually selected traits to changes in P, combined with the important roles these traits play in determining fitness and driving speciation, suggests that human-induced environmental change can greatly alter the evolutionary trajectories of populations.
Eutrophic status influences the impact of pesticide mixtures and predation on Daphnia pulex populations
<p>Pesticides, nutrients, and ecological stressors such as competition or predation co-occur in freshwater ecosystems impacted by agricultural pollution. The extent to which combinations of these stressors affect aquatic populations and the role of nutrients availability in modulating these responses requires further understanding. In this study, we assessed how pesticides affecting different taxonomic groups and predation influence the response of Daphnia pulex populations under different trophic conditions. An outdoor experiment was designed following a factorial design, with the insecticide chlorpyrifos, the herbicide diuron, and predation by Notonecta sp. individuals as key stressors. The single impact of each of these stressors, and their binary and tertiary combinations were evaluated on D. pulex abundance and population structure under mesotrophic and eutrophic conditions for 21 days. Data were analysed using generalized linear mixed models estimated by means of a novel Bayesian shrinkage technique. Our study shows a significant influence of each of the evaluated stressors on D. pulex abundance, however, the impacts of the herbicide and predation were lower under eutrophic conditions as compared to the mesotrophic ones. We found that binary stressor interactions were generally additive in the mesotrophic scenario, except for the herbicide-predation combination, which resulted in synergistic effects. The impacts of the binary stressor combinations in the eutrophic scenario were classified as antagonistic, except for the insecticide-herbicide combination, which was additive. The tertiary interaction resulted in significant effects on several sampling dates, however, those were rather antagonistic and resembled the most important binary stressor combination in each trophic scenario. Our study shows that the impact of pesticides on freshwater populations depends on the predation pressure, and demonstrates that the combined effect of pesticides and ecological stressors is influenced by the food availability and organism fitness related to the trophic status of freshwater ecosystems.</p>
Fig. 3 in Morphological, ecological and toxicological aspects of Raphidiopsis raciborskii (Cyanobacteria) in a eutrophic urban subtropical lake in southern Brazil
Fig. 3. Bar graphs indicating the specific densities (ind. ml-1) of Raphidiopsis raciborskii and other phytoplankton organisms (Cyanobacteria, Chlorophyta, Heterokontophyta, Euglenophyta and unidentified) sampled from the lake inflow (a) and outflow (b), every month from November 2009 to November 2010.
Fig. 5a, b in Morphological, ecological and toxicological aspects of Raphidiopsis raciborskii (Cyanobacteria) in a eutrophic urban subtropical lake in southern Brazil
Fig. 5a, b. Bar graphs showing the percentage of Raphidiopsis raciborskii trichomes that are vegetative cells only, with akinetes, with heterocytes, or with both heterocytes and akinetes. Data represent samples taken from the lake inflow (a) and outflow (b), every month from November 2009 to November 2010.
Data from: Comparing the responses of bryophytes and short-statured vascular plants to climate shifts and eutrophication
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Eutrophic status influences the impact of pesticide mixtures and predation on Daphnia pulex populations
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Data from: Eutrophication and predation risk interact to affect sexual trait expression and mating success
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Data from: Above- and belowground insect herbivores mediate the impact of nitrogen eutrophication on the soil food web in a grassland ecosystem
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A bay-wide self-regulated pH buffer mechanism in response to eutrophication and acidification in Chesapeake Bay
<p>ROMS model output with fine sediment (mud_01, diameter=0.002 mm) concentration and time (ocean_time) in Chesapeake Bay. There are total 13 output files covering the simulated period of time (00:00:00 2016-5-31 to 00:00:00 2016-8-31). For model configuration details, please refer to the paper.</p>
Data from: Freshwater eutrophication drives sharp reductions in temporal beta diversity
Eutrophication has become one of the most widespread anthropogenic forces impacting freshwater biological diversity. One potentially important mechanism driving biodiversity changes in response to eutrophication is the alteration of seasonal patterns of succession, particularly among species with short, synchronous life cycles. We tested the hypothesis that eutrophication reduces seasonally driven variation in species assemblages by focusing on an understudied aspect of biodiversity: temporal beta diversity . We estimated the effect of eutrophication on by sampling benthic macroinvertebrate assemblages bimonthly for 2 years across 35 streams spanning a steep gradient of total phosphorus (P) and benthic algal biomass (as chlorophyll). Two widely used metrics of β diversity both declined sharply in response to increasing P and chl, regardless of covariates. The most parsimonious explanatory model for included an interaction between P and macroinvertebrate biomass, which revealed that was lower when macroinvertebrate biomass was relatively high. Macroinvertebrate biomass explained a greater amount of deviance in at lower to moderate concentrations of P, providing additional explanatory power where P concentration alone was unable to fully explain declines in. Chl-explained similar amounts of deviance in comparison to the best P model, but only when temperature variability, which was positively related to, also was included in the model. Declines in suggest that nutrient enrichment decreases the competitive advantage that specialists gain by occupying particular temporal niches, which leads to assemblages dominated by generalists that exhibit little seasonal turnover. The collapse of seasonal variation in assemblage composition we observed in our study suggests that treating dynamic communities as static assemblages is a simplification that may fail to detect the full impact of anthropogenic stressors. Our results show that eutrophication leads to more temporally homogenous communities and therefore degrades a fundamental facet of biodiversity.
The impacts of whole-lake acidification and eutrophication on the accumulation of lead in sediments from manipulated lakes in the Experimental Lakes Area (IISD-ELA)
<p>Measured elemental Pb concentrations, radioisotopic activity profiles, calculated dates and mass accumulation rates</p> <p> </p> <p>Original Publication: Baud, A., Smol, J.P., Meyer-Jacob, C., Paterson, M., Francus, P., Gregory-Eaves, I., 2022. The impacts of whole-lake acidification and eutrophication on the accumulation of lead in sediments from manipulated lakes in the Experimental Lakes Area (IISD-ELA). Environ. Pollut., 120829. https://doi.org/10.1016/j.envpol.2022.120829</p>
Data from: Freshwater eutrophication drives sharp reductions in temporal beta diversity
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EUtrophic, MEsotrophic and oLIgotrophic (EUMELI) regimes program
Measurements from the EUMELI program, a component of FRANCE-JGOFS (Joint Global Ocean Flux Study), to study ocean fluxes in eutrophic, mesotrophic and oligotrophic waters.
United Nations Environment Programme - Sustainable Development Goal 14(2022): Index of coastal eutrophication in Latin America
Validation campaign in support of the United Nations Environment - Sustainable Development Goal 14.1.1a of 2022: Index of coastal eutrophication in Latin America. This dataset contains validation data for ocean color satellite data products and collects nutrient data on eutrophication. The data will be used to evaluate the effectiveness of the satellite-derived indicators and to develop more specific, level 2 satellite data indicators for the member countries in the future.
Data for the study titled "Productivity suppression by manganese recycling in suboxic hypolimnion of a eutrophic lake."
<p>Data for the study titled "Productivity suppression by manganese recycling in suboxic hypolimnion of a eutrophic lake."</p>
Figure 3 in Temporal dynamics of parasite populations and communities of blue sea catfish Ariopsis guatemalensis (Günther, 1864), in a eutrophic coastal lagoon from Mexican Pacific
Figure 3. Non-metric multidimensional scaling (nMDS) plot for parasite communities in Ariopsis guatemalensis from Tres Palos lagoon. Ellipses represent similarity levels between sampling months.
Effect of Gluten-free Diets on Anthropometric and Dietary Data of Healthy Eutrophic Women
ClinicalTrials.gov study NCT03129997. IPD Sharing: NO. Countries: 0. Publications: 0.
Eutrophication and warming rapidly alter microbial community compositions in the mangrove sediment
GEO Series GSE190739. uncultured soil microorganism. 16 samples. Type: Other.
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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.