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6,771 results for “freshwater”
Data from: Risk allocation in a freshwater gastropod
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Prickly postglacial pioneers: freshwater plankton community composition influences fatty acid desaturase (FADS2) copy number in Southern Greenland threespine sticklebacks
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Freshwater connectivity transforms spatially integrated signals of biodiversity
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Four decades of climatic fluctuations and fish recruitment stability across a marine-freshwater gradient
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Genome sequence and characterization of a freshwater photoarsenotroph, Cereibacter azotoformans strain ORIO, isolated from sediments capable of cyclic light-dark arsenic oxidation and reduction
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Data for Phenotypically plastic responses to freshwater salinization in larval amphibians: Induced tolerance and induced sensitivity
These data support a paper published by Relyea et al. in 2023 in the journal Environmental Pollution. In this manuscript titled 'Phenotypically plastic responses to freshwater salinization in larval amphibians: induced tolerance and induced sensitivity' the authors use a lab experiment to examine the effects of low levels of exposure to road salt pollution on amphibian responses to higher subsequent doses of the contaminant.
Investigation of road salts and biotic stressors on freshwater wetland communities.
The application of road deicing salts has led to the salinization of freshwater ecosystems in northern regions worldwide. Increased chloride concentrations in lakes, streams, ponds, and wetlands may negatively affect freshwater biota, potentially threatening ecosystem services. In an effort to reduce the effects of road salt, operators have increased the use of salt alternatives, yet we lack an understanding of how these deicers affect aquatic communities. We examined the direct and indirect effects of the most commonly used road salt (NaCl) and a proprietary salt mixture (NaCl, KCl, MgCl2), at three environmentally relevant concentrations (150, 470, and 780 mg Cl−/L) on freshwater wetland communities in combination with one of three biotic stressors (control, predator cues, and competitors). The communities contained periphyton, phytoplankton, zooplankton, and two tadpole species (American toads, Anaxyrus americanus; wood frogs, Lithobates sylvaticus). Overall, we found the two road salts did not interact with the natural stressors. Both salts decreased pH and reduced zooplankton abundance. The strong decrease in zooplankton abundance in the highest NaCl concentration caused a trophic cascade that resulted in increased phytoplankton abundance. The highest NaCl concentration also reduced toad activity. For the biotic stressors, predatory stress decreased whereas competitive stress increased the activity of both tadpole species. Wood frog survival, time to metamorphosis, and mass at metamorphosis all decreased under competitive stress whereas toad time to metamorphosis increased and mass at metamorphosis decreased. Collectively, road salts and biotic stressors both can affect freshwater communities, but their effects are not interactive. The direct and indirect effects of road salts reported are important for management and conservation efforts given the salinization of freshwater systems following winter road maintenance.
The Salinity and phosphorus mesocosm experiment in freshwater sawgrass wetlands: Determining the trajectory and capacity of freshwater wetland ecosystems to recover carbon losses from saltwater intrusion (FCE LTER), Florida, USA from 2015 to 2018
In experimental wetland mesocosms located at Florida Bay Interagency Science Center, Key Largo, Florida, researchers continuously added salinity (approximately 6.9 g salt d-1) and phosphorus ( approximately 0.5 mg P d-1) to Cladium jamaicense peat monoliths from February 2015 to February 2017 and quantified changes in carbon partitioning. Several studies, focusing on the functional roles of marsh, soil, periphyton and microbe in the sawgrass-peat ecosystem, summarized detailed methodology and results (Wilson et al. 2019; Servais et al. 2019; Mazzei et al. in press). Briefly, salinity was increased (~10 ppt) and phosphorus was added (0.45 mg P d-1) to simulate four treatment effects (n = 24 plots): i) freshwater and no-added phosphorus, ii) freshwater and added phosphorus, iii) saltwater and no-added phosphorus, and iv) saltwater and added phosphorus. Upon the termination of manipulation study (early February 2017), containers holding water and peat-sawgrass cores were drained, rinsed, and refilled with only freshwater without any added nutrient and salt. Then, we experimentally restored freshwater to previous treatment and control mesocosms from February 2017 to June 2018 to examine the capacity of wetland ecosystems to recover carbon losses from saltwater intrusion. Note that FCE1226_Water_quality.csv summarizes water quality during both the manipulation and restoration study; however, all other files in the Dataset Title section only summarize results from the restoration study. Detailed methodology is provided below.
Figure 2 in Two new genera, Limnohalacarus and Soldanellonyx (Acari: Halacaridae) in freshwater halacarid mites with additional new records from Turkey
Figure 2. Sampling locations: A. Çiftlik, Fethiye; B. Lake Eğirdir, Isparta.
Figure 7 in Two new genera, Limnohalacarus and Soldanellonyx (Acari: Halacaridae) in freshwater halacarid mites with additional new records from Turkey
Figure 7. Map of all recorded freshwater halacarid species in Turkey.
Figure 1 in Two new genera, Limnohalacarus and Soldanellonyx (Acari: Halacaridae) in freshwater halacarid mites with additional new records from Turkey
Figure 1. Map of the study areas showing the sampling stations.
Data for: Thresholds of freshwater biodiversity in response to riparian vegetation loss in the Neotropical region
<p>These files contain all the data and R scripts used for analyses of the manuscript "Thresholds of freshwater biodiversity in response to riparian vegetation loss in the Neotropical region", published in Journal of Applied Ecology.</p> <p>See Metadata (README).xls file for a detailed description of these files.</p> <p>Dala-Corte RB, Melo AS, Siqueira T, et al. Thresholds of freshwater biodiversity in response to<br> riparian vegetation loss in the Neotropical region. J Appl Ecol. 2020;00:1–12. https://doi.org/10.1111/1365-2664.13657</p>
Fig. 1 in Four new species of the subfamily Candoninae (Crustacea, Ostracoda) from freshwater habitats in Japan
Fig. 1. Map of the main islands of Japan, showing the localities mentioned in the text.
Fig. 5 in Caridina variabilirostris (Crustacea: Decapoda: Atyidae), a new species of freshwater shrimp from Pohnpei (Micronesia)
Fig. 5. Caridina variabilirostris sp. nov., live coloration (Photos: P. Keith)
Fig. 1 in A new species of freshwater Chaetonotidae (Gastrotricha, Chaetonotida) from Obodska Cave (Montenegro) based on morphological and molecular characters
Fig. 1. Map of Montenegro with the location of Obodska Cave.
Fig. 2 in A new species of freshwater Chaetonotidae (Gastrotricha, Chaetonotida) from Obodska Cave (Montenegro) based on morphological and molecular characters
Fig. 2. Scheme of Obodska Cave. 1, 2, 3, 4 = sampling localities.
Data from: Historical demography and climate driven distributional changes in a widespread Neotropical freshwater species with high economic importance
The Neotropical region exhibits the greatest worldwide diversity and the diversification history of several clades is related to the puzzling geomorphologic and climatic history of this region. The freshwater Amazon ecoregion contains the main hydrographic basins of the Neotropical region that are highly dendritic and ecologically diverse. It contains a rich and endemic fish fauna, including one of its most iconic and economically important representatives, the bony-tongue Arapaima gigas (Teleostei, Osteoglossiformes). Here, we evaluated the projected distribution of the genus in different historical periods (Present, Last Glacial Maximum, Last Interglacial Maximum and Near Future) and interpreted these results in light of the genomic diversity and modeled historical demography. For that, we combined species distribution models, population genetic analysis using SNPs and deep learning model selection. We analyzed a representative sample of the genus from the two basins where it naturally occurs, four localities in the Amazon (Am) and three in the Tocantins-Araguaia (To-Ar) basin, as well as individuals from three fish farms. We inferred a potentially smaller distribution in the glacial period, with a possible refuge in central Am. Our genetic data agrees with this result, suggesting a higher level of genetic diversity in the Am basin, compared to that observed in To-Ar. Our deep learning model comparison indicated that the To-Ar basin was colonized by the population from the Am basin. Considering a global warming scenario in the near future, A. gigas could reach an even larger range, especially if anthropogenic related dispersal occurs, potentially invading new areas and impacting their communities.
PNAS Freshwater Salinization Syndrome
<p>This report was published online by the National Academy of Sciences - the DOI is https://doi.org/10.1073/pnas.1711234115. This spreadsheet lists the descriptions and trends (sen slopes) for each chemical parameter at each location that was used in that study. All raw data is publicly available and was downloaded from waterwatch.usgs.gov.</p>
Data from: Phosphorus limitation does not drive loss of bony lateral plates in freshwater stickleback (Gasterosteus aculeatus)
Connecting the selective forces that drive the evolution of phenotypes to their underlying genotypes is key to understanding adaptation, but such connections are rarely tested experimentally. Threespine stickleback (<i>Gasterosteus aculeatus</i>) are a powerful model for such tests because genotypes that underlie putatively adaptive traits have been identified. For example, a regulatory mutation in the <i>Ectodysplasin</i> (<i>Eda</i>) gene causes a reduction in the number of bony armor plates, which occurs rapidly and repeatedly when marine sticklebacks invade freshwater. However, the source of selection on plate loss in freshwater is unknown. Here, we tested whether dietary reduction of phosphorus can account for selection on plate loss due to a growth advantage of low-plated fish in freshwater. We crossed marine fish heterozygous for the 16 kilobase freshwater <i>Eda</i> haplotype and compared the growth of offspring with different genotypes under contrasting levels of dietary phosphorus in both saltwater and freshwater. <i>Eda</i> genotype was not associated with growth differences in any treatment, or with mechanisms that could mitigate the impacts of phosphorus limitation, like differential phosphorus deposition, phosphorus excretion, or intestine length. This study highlights the importance of experimentally testing the putative selective forces acting on phenotypes and their underlying genotypes in the wild.
Species identity and diversity effects on invasion resistance of tropical freshwater plant communities
<p>Biotic resistance mediated by native plant diversity has long been hypothesized to reduce the success of invading plant species in terrestrial systems in temperate regions. However, still little is known about the mechanisms driving invasion patterns in other biomes or latitudes. We help to fill this gap by investigating how native plant community presence and diversity, and the presence of native phylogenetically closely related species to an invader, would affect invader <i>Hydrilla verticillata</i> establishment success in tropical freshwater submerged plant communities. The presence of a native community suppressed the growth of <i>H. verticillata</i>, but did not prevent its colonisation. Invader growth was negatively affected by native plant productivity, but independent of native species richness and phylogenetic relatedness to the invader. Native plant production was not related to native species richness in our study. We show that resistance in these tropical aquatic submerged plant communities is mainly driven by the presence and biomass of a native community independent of native species diversity. Our study illustrates that resistance provided by these tropical freshwater submerged plant communities to invasive species contrasts to resistance described for other ecosystems. This emphasizes the need to include understudied systems when predicting patterns of species invasiveness and ecosystem invasibility across biomes. </p>
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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.