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48 results for “benthic macroinvertebrates”
Development of a benthic macroinvertebrate multimetric index (MMI) for Neotropical Savanna headwater streams. Appendix C
<p>Appendix C. Metric Screening<br> </p>
Data from: Reductions in body size of benthic macroinvertebrates as a precursor of the Early Toarcian (Early Jurassic) extinction event in the Lusitanian Basin, Portugal
Reduction of body size is a common response of organisms to environmental stress. Studying the Early Toarcian succession in the Lusitanian Basin of Portugal, we tested whether the shell size of benthic marine communities of bivalves and brachiopods changed at and prior to the global, warming-related Toarcian Oceanic Anoxic Event (T-OAE). Statistical analyses of shell size over time show that the mean shell size of communities decreased significantly prior to the T-OAE. This trend is distinct in brachiopods and is caused by larger-sized species becoming less abundant over time, whereas it is not significant in bivalves, suggesting a decoupled response to environmental stress. Reductions in shell size precede the decline in standardized sample-level species richness associated with the Early Toarcian extinction event. Such decreases in the shell size of marine invertebrates, well before the onset of biodiversity change, suggest that reductions in body size more generally may be a precursor of a subsequent loss of species and turnover at the community-level caused by climate change. Sedimentological evidence is against hypoxia as a driver of extinction and preceding size decrease in the brachiopod fauna in the studied succession, although low oxygen levels are widely held responsible for elevated Early Toarcian extinction rates globally. Reduction of mean shell size in brachiopods but stasis in bivalves is difficult to explain with ocean acidification because experimental work shows that brachiopods can be resilient to lowered pH, albeit long-term metabolic costs and potential evolutionary adaptations are unknown. Rising Early Toarcian temperatures in the Lusitanian Basin seem to be a plausible factor in both diversity decline associated with the T-OAE as well as the preceding reductions in mean shell size because thermal tolerances in modern bivalves are among the highest within marine invertebrates.
List of benthic macroinvertebrate taxa from the upper Paraná River floodplain: summarizing information from a literature search
<p>We created a checklist of benthic macroinvertebrates taxa found in the environments of the upper Parana River floodplain according to the information found in published articles. The checklist data presents the taxa list, the substrate type, the environment type, and the year that each taxon was initially recorded for the region. We searched for data on aquatic macroinvertebrates recorded in the upper Paraná River floodplain by reviewing published articles and reports (grey literature). We took data from an extensive literature search at the ISI Web of Knowledge, SciELO, and Scopus websites, using the keyword combination “upper Paraná River” or “Paraná River” and “floodplain” or “wetland” and “macroinvertebrate*” for the search. We selected articles published between 1990 and 2020. We selected the articles following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) model (Liberati et al., 2009) and considered the selection in four steps: (1) the country of the study, (2) the title, (3) the abstract, and (4) the full text. The selection of papers followed some eligible parameters such as type of organisms, study area, and the presence of taxa data. During the selection, we excluded macroinvertebrates recorded as parasites or those found in studies of vertebrate feeding habits. Articles that contained these two criteria were excluded from the analyses. The articles that remained were analysed regarding the type of substrate where the macroinvertebrates were recorded (i.e., sediment, macrophytes, or artificial substrates), type of environment where each taxon was found (i.e., lentic or lotic environment), and the year in which each taxon was recorded for the first time in the upper Paraná River floodplain.</p>
Data from: Reductions in body size of benthic macroinvertebrates as a precursor of the Early Toarcian (Early Jurassic) extinction event in the Lusitanian Basin, Portugal
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Data supplementing the article "Aquatic biofilms as passive environmental DNA samplers: application to benthic macroinvertebrate communities in rivers" - raw MiSeq data inventories
<p>These data supplement the article “Aquatic biofilms as passive environmental DNA samplers: application to benthic macroinvertebrate communities in rivers” Sinziana F. Rivera, Valentin Vasselon, Nathalie Mary, Olivier Monnier, Fréderic Rimet & Agnès Bouchez submitted to “Molecular Ecology Resources” journal.</p> <p>The directory is composed of: “38_samples_fastq:files”: contains raw demultiplexed fastq files (R1. fastq and R2. fastq) for each of the 38 samples used in this study to produce OTUs and taxonomic inventories.</p> <p>“Samples id.xlsx”: contains the samples ID of the fastq files</p> <p>“Inventories.xlsx”: contains single and multi-habitat morphological inventories as well as molecular inventories resulting from the study</p>
Development of a benthic macroinvertebrate multimetric index (MMI) for Neotropical Savanna headwater streams. Appendix A
<p>Appendix A. Candidate metrics for inclusion in the MMI</p>
Figure 1 in Comparison of trophic structure of the benthic macroinvertebrates in three Bulgarian riverine water bodies
Figure 1. Location of studied points of the Mesta, Tundzha, and Vit Rivers.
Benthic macroinvertebrates in a protected area within the Brazilian savannah
<p>Collection.</p>
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International Brain Laboratory public data
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OpenNeuro
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