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151 results for “Streams and rivers”
Dataset of chemicals of emerging concern detected in streams and rivers of Central Chile
<p>This repository encompasses the environmental concentrations of chemicals of emerging concern (CECs) occurring in surface water samples obtained from streams and rivers in Central Chile, specifically the River Aconcagua basin.</p>
Figure 1 in Length-weight relationship, sex ratio, and diet of three fish species (Actinopterygii: Teleostei) in streams of the Pomba River basin, Paraíba do Sul river drainage, Southeastern Brazil
Figure 1. Volumetric frequency (Vi%) of food items identified in the diet of D. intermedius (A), A. paraibae (B) and H. punctatus (C) in streams in the Pomba River basin, Brazil, from October to December 2018.
Training data from: Machine learning predicts which rivers, streams, and wetlands the Clean Water Act regulates
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Prediction data from: Machine learning predicts which rivers, streams, and wetlands the Clean Water Act regulates
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Sestonic Chlorophyll in Missouri's streams and rivers
This dataset comprises sestonic chlorophyll a (Chl-a) data collected from streams and rivers in Missouri between 1978 and 2009. The data comes from dissertations, theses, and focused stream studies by students and staff from the University of Missouri Limnology Lab. In addition to sestonic Chl-a, the dataset includes total phosphorus (TP) and total nitrogen (TN), and watershed characteristics such as watershed area, mean watershed slope, and land use. Chlorophyll-a was corrected for pheophytin and analyzed by fluorometric analysis following U.S. Environmental Protection Agency method 445.0, modified using heated ethanol extraction without homogenization (Sartory and Grobbelaar, 1984) and a fluorometer equipped with a flow-through cell (Knowlton, 1984). Chlorophyll was extracted in acetone/dimethyl sulfoxide (Stauffer et al. 1979) prior to 1986. Starting in 1986, chlorophyll was extracted in ethanol (Sartory & Grobbelaar 1984). TN and TP analysis were conducted by spectrophotometry using persulfate digestion and cadmium reduction for TN and ascorbic acid for TP. The laboratory methods used are described in detail in Jones, Argerich et al. (2020), and the same laboratory was utilized throughout the studies, with minor variations in methodology being cross-checked over time. We used ArcInfo GIS based on 1-m resolution digital elevation data to estimate stream watershed area and mean watershed slope. Land cover was obtained from 30-m imagery from the LANDSAT thematic mapper developed by the Missouri Resource Assessment Partnership.
Maple River Dam Removal Stream Ecology Data
Over the past two decades, dam removal has become an increasingly important aspect of aquatic ecology. The motivation for the removal broadly ranges from purely ecological terms, restoring stream or river connectivity, through safety concerns, as a result of crumbling infrastructure, to economic concerns, increasing local tourism, recreational fishing, or canoeing and kayaking. As a result of this work, ecological studies have arisen that monitor the changes to the riverine ecosystem as a result of removal. Unfortunately, given the uncertain nature of funding and public concerns over dam removal, long term longitudinal studies that cover multiple trophic levels are difficult to find. Fortunately, the University of Michigan Biological Station has been involved in the ecological monitoring of a headwater river (the Maple River) in the northern part of the lower peninsula of Michigan. Through the tremendous intellectual resources available at the station, the physical, chemical, and some biological aspects of this river’s ecology has been measured for eight years prior to the dam removal, during the dam removal, and for two years post-dam removal. The results presented here show that the ecology of the river recovered within this two-year period, but had a different ecological state driven. This new state is primarily driven increases in flow, ammonia, silica, and increases in the populations of the macroinvertebrate feeding guilds of filterers and scrapers. In addition, decreases in stream pH and water temperature contributed to this new state. The results and observations presented here may provide some guidance for other long term monitoring studies.
A dataset for methane concentrations and fluxes for alpine permafrost streams and rivers on the East Qinghai-Tibet Plateau
This dataset is a collation of 3-year direct measurement values of CH4 concentrations and fluxes for EQTP streams and rivers, along with information on location, hydrological, physical, and chemical conditions of the study sites. Given the rarity and high value of this EQTP data set, it will be very valuable for the next update to global C flux estimates.
Chemistry of stream water for the Lamprey River Hydrologic Observatory
Stream water is collected at weekly to monthly intervals at several sites within the Lamprey River Hydrologic Observatory (LRHO). These data sets begin in 1999. Stream water grab samples are taken from a well-mixed portion of the stream channel on the routine sampling day (typically Tuesdays). Additional samples are collected during selected storm events. A continuous record of stream discharge is recorded by the United States Geological Survey (USGS 01073500) near the mouth of the Lamprey River and average daily and instantaneous stream discharge data are available. Hourly climate data are available from the NOAA NCDC U.S. Climate Reference Network (USCRN) at a station (NH Durham 2 SSW) in the lower part of the watershed. Field meters are used to determine dissolved oxygen, pH and conductivity in the stream and stream samples are filtered (pre-combusted 0.7 μm Whatman GF/F glass fiber filter) and frozen prior to analysis unless otherwise specified. All analyses were conducted at the Water Quality Analysis Laboratory at the University of New Hampshire.
ARCSS/TK water chemistry and total suspended sediment data from I-Minus2 and Toolik River thermokarsts and receiving streams, near Toolik Field Station, Alaska, summers 2006-2013.
Water samples were taken at 5 locations at both I-Minus2 and Toolik River thermokarst sites (10 sampling locations total). A combination of ISCO and manual grab samples were taken depending on the sampling location and year.
Indicative distribution map for Ecosystem Functional Group F1.3 Freeze-thaw rivers and streams
<p>This archive contains indicative distribution maps and profiles for <strong>F1.3 Freeze-thaw rivers and streams</strong>, a ecosystem functional group (EFG, level 3) of the <a href="https://global-ecosystems.org/">IUCN Global Ecosystem Typology</a> (v2.0). Please refer to Keith <em>et al.</em> (2020) for details.</p> <p>The descriptive profiles provide brief summaries of key ecological traits and processes, maps are indicative of global distribution patterns, and are not intended to represent fine-scale patterns. The maps show areas of the world containing major (value of 1, coloured red) or minor occurrences (value of 2, coloured yellow) of each ecosystem functional group. Minor occurrences are areas where an ecosystem functional group is scattered in patches within matrices of other ecosystem functional groups or where they occur in substantial areas, but only within a segment of a larger region. Given bounds of resolution and accuracy of source data, the maps should be used to query which EFG are likely to occur within areas, rather than which occur at particular point locations. Detailed methods and references for the maps are included in the profile (xml format).</p>
Non-Perennial rivers and streams under hydrological stress – comparing the effectiveness of amplicon sequencing and digital microscopy for diatom biodiversity appraisal
<p>ABC is project leader, data collector, contact person, etc.</p>
Figure 2. A in Fish diversity of the Vatrak stream, Sabarmati River system, Rajasthan
Figure 2. A view of area of study.
(Source: Google Earth) Figure 1. Area of Study. in Fish diversity of the Vatrak stream, Sabarmati River system, Rajasthan
(Source: Google Earth) Figure 1. Area of Study.
Dataset: A global synthesis of human impacts on the multifunctionality of streams and rivers
<p><span>Human impacts, particularly nutrient pollution and land-use change, have caused significant declines in the quality and quantity of freshwater resources. Most global assessments have concentrated on species diversity and composition, but effects on the multifunctionality of streams and rivers remain unclear. Here, we analyse the most comprehensive compilation of stream ecosystem functions to date to provide an overview of the responses of nutrient uptake, leaf litter decomposition, ecosystem productivity, and food web complexity to six globally pervasive human stressors. We show that human stressors inhibited ecosystem functioning for most stressor-function pairs. Nitrate uptake efficiency was most affected and was inhibited by 347% due to agriculture. However, concomitant negative and positive effects were common even within a given stressor-function pair. Some part of this variability in effect direction could be explained by the structural heterogeneity of the landscape and latitudinal position of the streams. Ranking human stressors by their absolute effects on ecosystem multifunctionality revealed significant effects for all studied stressors, with wastewater effluents (194%), agriculture (148%), and urban land use (137%) having the strongest effects. Our results demonstrate that we are at risk of losing the functional backbone of streams and rivers if human stressors persist in contemporary intensity, and that freshwaters are losing critical ecosystem services that humans rely on. We advocate for more studies on the effects of multiple stressors on ecosystem multifunctionality to improve the functional understanding of human impacts. Finally, freshwater management must shift its focus towards an ecological function-based approach and needs to develop strategies for maintaining or restoring ecosystem functioning of streams and rivers.</span></p>
Combined effects of stream hydrology and land use on basin-scale hyporheic zone denitrification in the Columbia River Basin
<p><strong>This data includes inputs and outputs of a coupled carbon-nitrogen river corridor model (RCM) for the Columbia River Basin and sensitivity results with varying substrate concentrations, and random forest model results with key model inputs/watershed/stream variables. The detailed descriptions of the individual files are included in the readme.txt file. </strong></p>
Fig. 1 in Macrophyte Vegetation Assessment In Streams Of The Venta River Basin District
Fig. 1. Location of sampling sites in the Venta River Basin district, Latvia.
Fig. 3 in Macrophyte Vegetation Assessment In Streams Of The Venta River Basin District
Fig. 3. Correlation between species richness and ammonium nitrogen (N-NH4+).
Fig. 1 in Short communication First record of eyeless specimens of Gammarus roeselii Gervais 1835 (Amphioda, Gammaridae) in a small stream of the sub-lacustrine Ticino River basin (Lombardy, Northern Italy)
Fig. 1 - The non-native amphipod Gammarus roeselii Gervais 1835 (from Paganelli et al., 2015).
Fig. 2 in Evidence of the color pattern variation in populations of Gymnotus pantanal (Gymnotiformes) from three streams in the upper Paraná River basin, Brazil
Fig. 2. Gymnotus pantanal, holotype, 196.0 mm TL, MZUSP 67874.
Supplementary Tables and Datasets for publication: Spatial and finely tuned temporal metagenomics of river compartments reveals viral community dynamics in an urban stream
<p>This is a data dump of the tables, genomes, and .faa files that were too large to submit as part of the publication titled: Spatial and finely tuned temporal metagenomics of river compartments reveals viral community dynamics in an urban stream</p> <p> </p> <p>Files here include:</p> <p>-Fasta file containing 1230 vMAGs.</p> <p>-Zip file containing individual fasta files for 125 MAGs</p> <p>-Annotations output for DRAM and DRAM-v for all MAGs and vMAGs</p> <p>-.faa proteins file for the full Freshwater / Wastewater / TARA Oceans dataset that was used for vContact2 biogeography analyses</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.