EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
6/06/2017 | 2:45 PM - 3:00 PM | Does chironomid species diversity differ across a land use gradient of estuaries on the Caribbean coast of Costa Rica? | 306B
Does chironomid species diversity differ across a land use gradient of estuaries on the Caribbean coast of Costa Rica?
Sediments and nutrients transported from watersheds converted from forested to agricultural landscapes have consequences on productive estuarine environments. Species-rich and abundant midges are widely used as bioindicators of water quality, since their community composition is influenced by different watershed land uses. We analyzed chironomid species diversity in nine estuaries from watersheds representing a land use gradient from mostly primary and secondary tropical rainforest to largely covered with monoculture plantation agriculture (e.g. banana and/or pineapple). We made Chironomidae surface-floating pupal exuviae collections during July 2012, January 2013, July 2013, and January 2014. We identified 229 species and 69 genera from 17,778 specimens. Estero Negro had the lowest relative abundance (n=474), while Rio Estrella had the highest relative abundance (n=3802). We investigated Chironomidae species diversity through simultaneous univariate analyses of species richness, species evenness, species dominance, species diversity, and generic pollution tolerance. The results of this study will be useful for conservation and management of tropical watersheds and monitoring long-term water quality trends of estuarine and coastal ecosystems.
- S13 Freshwater protected areas: optimizing conservation of functional and taxonomic biodiversity
- C18 Biodiversity
- S09 The importance of environmental gradients for the advance of tropical stream ecology
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Presenters/Authors
Petra Kranzfelder
(), University of Minnesota Twin Cities, kranz081@umn.edu;
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Leonard C. Ferrington, Jr.
(), University of minnesota, ferri016@umn.edu;
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