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41 results for “tropical streams”
Data from: Do experimental pH increases alter the structure and function of a lowland tropical stream?
<p>Disturbances can alter the structure and function of ecosystems. In stream ecosystems, changes in discharge and physicochemistry at short, intermediate, and long recurrence intervals can affect food webs and ecosystem processes. In this paper, we compare pH regimes in streams at La Selva Biological Station, Costa Rica, where episodic acidification frequency across the stream network varies widely due to buffering from inputs of bicarbonate-rich inter-basin groundwater. To examine the effects of acidification on ecosystem structure and function, we experimentally increased the buffering capacity of a headwater stream reach, and compared it to an unbuffered upstream reach. We compared these reaches to a naturally buffered and unbuffered reaches of a second headwater stream. We quantified ecosystem structural (macroinvertebrate assemblages on leaf litter and coarse woody debris), and functional responses (leaf litter and coarse woody debris decomposition rates, and growth rates of a focal insect taxon (Diptera: Chironomidae)). Non-metric multidimensional scaling and analysis of similarity revealed that macroinvertebrate assemblages were relatively homogenous across the four study reaches, although the naturally buffered reach was the most dissimilar. Ecosystem function, as measured by chironomid growth rates, was greater in the naturally buffered reach, while decomposition rates did not differ across the four reaches. Our results indicate that biological assemblages are adapted to pH regimes of frequently acidified stream reaches. Our experiment informs the effects on structure and function at short time scales in streams that experience moderate acidification, but larger magnitude acidification events in response to hydroclimatic change, as projected under climate change scenarios, may induce stronger responses in streams.</p>
Data set and analytic codes supporting "Length-biomass equations to allow rapid assessment of semi-aquatic bug biomass in tropical streams"
<p>Body size and biomass data of semi-aquatic bugs (Gerromorpha, Hemiptera) collected in a range of habitat types (oil palm, oil palm with buffer, logged forest, and old-growth forest) in the SAFE Project (Stability of Altered Forest Ecosystems) experimental area, Maliau Basin, and Danum Valley. The sites are located in Sabah, Malaysia. In this study, we developed length-biomass equations to estimate the biomass of semi-aquatic bugs.</p>
Finkler et al. Short-term Effects of Wildfire on Ecosystem Functioning in a Tropical Headwater Stream.
<p>Dataset used for the manuscript "Short-term Effects of Wildfire on Ecosystem Functioning in a Tropical Headwater Stream" by Finkler et al.</p>
A preliminary study of the allochthonous inputs into tropical streams across a land use gradient in Sabah, Malaysia
<b>Description: </b><p>Leaf and invertebrate biomass in streams</p><p><b>Project: </b>This dataset was collected as part of the following SAFE research project: <a href="https://www.safeproject.net/projects/project_view/174"><b>A preliminary study of the allochthonous inputs into tropical streams across a land use gradient in Sabah, Malaysia</b></a></p><p><b>XML metadata: </b>GEMINI compliant metadata for this dataset is available <a href="https://www.safeproject.net/datasets/xml_metadata?id=19">here</a></p><p><b>Data worksheets: </b>There are 2 data worksheets in this dataset:</p><ol><li><p><b>Insects</b> (Worksheet Insects)</p><p>Dimensions: 23 rows by 11 columns</p><p>Description: Insect capture rates</p><p>Fields: </p><ul><li><b>Location</b>: SAFE project riparian site (Field type: Location)</li><li><b>Stream</b>: SAFE project stream (Field type: ID)</li><li><b>Repeat</b>: sample number for that stream (Field type: ID)</li><li><b>Total Mass of Insects (g)</b>: the total dried mass of insects collected for each of the repeats (Field type: Numeric)</li><li><b>Total Insects</b>: the total number of insects collected in each repeat (Field type: Abundance)</li><li><b>Hymenoptera</b>: the total number of hymenoptera in each repeat (Field type: Abundance)</li><li><b>Diptera</b>: the total number of diptera in each repeat (Field type: Abundance)</li><li><b>Coleoptera</b>: the total number of coleoptera in each repeat (Field type: Abundance)</li><li><b>Other.Insect</b>: the grouped total of Hemiptera, Thysanoptera, Orthoptera, Blattodea, Trichoptera, Mantodea, Ephemeroptera, Dermaptera for each repeat (Field type: Abundance)</li><li><b>Other</b>: the grouped total of Arachnida, Entognatha, Diplopoda, Chilopoda for each repeat (Field type: Abundance)</li></ul><br></li><li><p><b>Hydrology</b> (Worksheet Hydrology)</p><p>Dimensions: 60 rows by 17 columns</p><p>Description: River characteristics and litter quantities</p><p>Fields: </p><ul><li><b>Location</b>: SAFE project riparian site (Field type: Location)</li><li><b>Stream Code</b>: The stream from which the sample was taken (LFE, 15m, 30m, VJR or OP) (Field type: ID)</li><li><b>Transect No.</b>: The point of each sample within the 100m transect at each stream (Field type: ID)</li><li><b>Channel Width</b>: The bank full width of the channel at this point (Field type: Numeric)</li><li><b>Wetted Width</b>: The width of the runnin water at this point (Field type: Numeric)</li><li><b>SAFE Habitat Quality Right</b>: the SAFE Habitat quality on the right of the channel when looking upstream (Field type: Ordered Categorical)</li><li><b>SAFE Habitat Quality Centre</b>: the SAFE Habitat quality in the centre of the channel when looking upstream (Field type: Ordered Categorical)</li><li><b>SAFE Habitat Quality Left</b>: the SAFE Habitat quality on the left of the channel when looking upstream (Field type: Ordered Categorical)</li><li><b>Flow Rate Right (s)</b>: the time taken for a tennis ball to travel 10m in the water on the right of the channel when looking upstream (Field type: Numeric)</li><li><b>Flow Rate Centre (s)</b>: the time taken for a tennis ball to travel 10m in the water in the centre of the channel when looking upstream (Field type: Numeric)</li><li><b>Flow Rate Left (s)</b>: the time taken for a tennis ball to travel 10m in the water on the left of the channel when looking upstream (Field type: Numeric)</li><li><b>Average Flow Rate (s)</b>: an average of flow rate centre, flow rate left and flow rate right (Field type: Numeric)</li><li><b>Leaf Litter Retention (g)</b>: the dried mass of leaf litter retained across the wetted width of the stream at each point (Field type: Numeric)</li><li><b>Average Substrate Size</b>: the average size of the substrate across the channel width of the stream at each point (Field type: Numeric)</li><li><b>Leaf Litter Trap Position</b>: the position where the leaf litter trap was placed relative to the stream when looking upstream (left, right or centre) (Field type: Categorical)</li><li><b>Leaf Litter Mass</b>: the dried mass of leaf litter collected in the leaf litter trap at each point (Field type: Numeric)</li></ul><br></li></ol><p><b>Date range: </b>2017-02-06 to 2017-07-06</p><p><b>Latitudinal extent: </b>4.6314 to 4.7273</p><p><b>Longitudinal extent: </b>117.4556 to 117.6233</p><p><b>Taxonomic coverage: </b><br> All taxon names are validated against the GBIF backbone taxonomy. If a dataset uses a synonym, the accepted usage is shown followed by the dataset usage in brackets. Taxa that cannot be validated, including new species and other unknown taxa, morphospecies, functional groups and taxonomic levels not used in the GBIF backbone are shown in square brackets.</p><div>Animalia<br> - Arthropoda<br> -  - Insecta<br> -  -  - Coleoptera<br> -  -  - Diptera<br> -  -  - Hymenoptera<br> -  - [Other.Insect]<br></div><p></p>
Figure 2 in TEMPORAL PARTITIONING OF CHIRONOMIDAE EMERGENCE IN AN INSULAR, TROPICAL RAINFOREST STREAM Abstract
Figure 2. Emergence trap on Quebrada Prieta.
Land-use change erodes trophic redundancy in tropical forest streams: Evidence from amino acid stable isotope analysis
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Warming threatens aquatic-terrestrial linkages: evidence from tropical geothermal streams
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Data from: Do experimental pH increases alter the structure and function of a lowland tropical stream?
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Morphological traits mediate fish occurrences in oil palm-impacted tropical streams
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Data from: Partitioning multiple facets of beta diversity in a tropical stream macroalgal metacommunity
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Data from: Tropical shift in decomposers' relative contribution to leaf litter breakdown in two Guinean streams
The hypothesis that leaf litter breakdown in Guinean streams is governed by microorganisms was confirmed, supporting the reported latitudinal shift in decomposers' contribution to this process. The large body size of dominant macroinvertebrate decomposers (shrimps) only partially compensated for their very low densities. In contrast with other tropical regions mostly dominated by insect larvae, the functional consequences of global warming on these stream ecosystems may be less severe due to the lower sensitivity of crustaceans to temperature increase.
Data from: Untangling the complex food webs of tropical rainforest streams.
<p>This submission encompasses biological data sampled in five stream stretches at the Cananeia watershed in São Paulo State (Brazil) in 2019.</p> <p>The dataset includes:</p> <p>1) Individually measured data from invertebrates and fish.</p> <p>2) Gut content data from fish species.</p> <p>3) Stable Isotopes data from animals and basal resources.</p> <p>4) A literature compilation of trophic interactions for the species in the dataset.</p>
Metadata from "Multiple stressors in tropical streams: nitrate interactions mediate diatom community responses in experimental streams"
<p>These are datasets on benthic diatom communities sampled in outdoor experimental stream mesocosms in Brazil (ExStream system) under the influence of multiple stressors related to agriculture. The data also include information on the three stressors: sediment (two levels), nitrate (four levels), and water flow (two levels) in a full factorial design.</p> <p>In addition to the datasets, we also provide the R codes used to investigate the individual and interactive effects of the stressors on the benthic diatom communities, analyzing diversity attributes. The dataset also contains chlorophyll-a concentrations.</p>
Data for "Thresholds of acidification impacts on macroinvertebrates adapted to seasonally acidified tropical streams"
<p>Dataset associated with the paper "Thresholds of acidification impacts on macroinvertebrates adapted to seasonally acidified tropical streams: potential responses to extreme drought-driven pH declines" (Ganong et al., PeerJ).</p>
FIGURE 6–12 in A new species of Choroterpes (Ephemeroptera: Leptophlebiidae) from a tropical stream of south India
FIGURE 6–12. Nymph of C. alagarensis. 6, labrum; 7, right mandible, dorsal; 8) maxilla, ventral; 9) hypopharynx, ventral; 10, labium: right, ventral view, 11) fore claw of nymph and 12) gill IV.
FIGURE 1–5. C. alagarensis. 1 in A new species of Choroterpes (Ephemeroptera: Leptophlebiidae) from a tropical stream of south India
FIGURE 1–5. C. alagarensis. 1, fore wing; 2, hind wing; 3, lateral view of male abdominal segments; 4, tergites II – VII of male abdomen; 5, male genitalia.
Leaf litter quality drives the feeding by invertebrate shredders in tropical streams
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Data from: Is environmental legislation conserving tropical stream faunas? a large-scale assessment of local, riparian and catchment-scale influences on Amazonian stream fish
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Data from: The effect of agriculture on the seasonal dynamics and functional diversity of benthic biofilm in tropical headwater streams
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Data from: Stream flow alone does not predict population structure of diving beetles across complex tropical landscapes
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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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
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