2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/22/2018 | 11:30 AM - 11:45 AM | MACROINVERTEBRATE COMMUNITY RESPONSE TO FLOW IN TWO HEADWATER STREAMS OF COSTA RICA | 410 B
MACROINVERTEBRATE COMMUNITY RESPONSE TO FLOW IN TWO HEADWATER STREAMS OF COSTA RICA
Rising global temperature is a driver altering intensity and duration of precipitation in tropical wet and dry seasons. Extremes in hydrological events combined with increasing population and tourism in Costa Rica are projected to affect local water availability. We are quantified the effects of seasonal flow variation on aquatic macroinvertebrate communities within two headwater streams, one intermittent and the other perennial, in the Pacific North of Costa Rica. We sampled macroinvertebrates monthly over a year in riffle, pool and leaf litter habitats. A total of 79 invertebrate taxa were found. Non-metric multidimensional scaling (NMDS) analyses indicated dissimilarities in macroinvertebrate abundance and composition between the two streams (ADONIS p<0.05). A similarity percentages (SIMPER) test of macroinvertebrate abundance indicated that the highest contributors to these differences were Non-Tanypodinae Chironomidae, Calosopsyche, Anchytarsus, Simulium, Leptonema, Tanypodinae Chironomidae and Leptohyphes. These results may provide a better understanding into life history traits that allow persistence of taxa through disturbances. Understanding the ecological response of these relatively under-studied systems will help us better prepare for the consequences of projected changes in stream flows.
- Disturbance
- Hydrology
- Intermittent
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Presenters/Authors
Darixa Hernandez Abrams
(), US Army Corps of Engineers, darixa.hernandez@uga.edu;
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Scott Connelly
(), University of Georgia, scottcon@uga.edu;
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Seth Wenger
(), Odum School of Ecology, University of Georgia, swenger@uga.edu;
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Mary Freeman
(), US Geological Survey, mcfreeman@usgs.gov;
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