Dataset 795
Trinidad's Northern Range Freshwater Invertebrate Survey (2011-2015)
Realm: Freshwater
Climate: Tropical
Biome: Small river ecosystems Central latitude: 10.683120
Central longitude: -61.272670
Duration: 5 years, from 2011 to 2015
Climate: Tropical
Biome: Small river ecosystems Central latitude: 10.683120
Central longitude: -61.272670
Duration: 5 years, from 2011 to 2015
5993 records
30 distinct species
Across the time series Elmidae is the most frequently occurring speciesMethods
"Sites in Trinidads Northern Range (SI Appendix) were sampled four times per year (twice in the wet season and twice in the dry season) for 5 y (20102015). On each sampling occasion the diversity of fish, benthic invertebrates, and diatoms at a site was quantified. Sampling methodology was consistent throughout. Eight of our sites were exposed to human pressure in the form of recreational use (31). These recreationally disturbed” (d) sites were matched with recreationally undisturbed” (u) sites in the same river system." "The same 50-m stretches of stream were revisited each session." "a surber sampler (2) was deployed to assess benthic invertebrates. Five samples, dispersed along the stream section, were taken on gravel substratum. These samples were preserved in alcohol and returned to the laboratory where all taxa were identified to family (the best taxonomic resolution achievable based on local expertise at the University of the West Indies, Trinidad & Tobago). All individuals sampled were recorded. Data from the invertebrate samples at a given site and session were combined for analysis"[Extracted from Magurran et al., 2018 & Supplementary Material] Additional: Abundance units are individual counts. Grain size is the length of the river reaches sampled. Most specimens that could only be identified to higher classifications than family are kept in the dataset. The only exeption are unidentified insecta other than lepidoptera because it cannot be ruled out that they belonged to families already reported in the dataset. Data collected the first year of sampling (2010) are excluded because sampling effort was unequivalent with the rest of the time series. Two sampling repeatabilities carried out in the Acono and Maracas sites in 2011 are excluded.Citation(s)
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