2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/20/2019 | 12:15 PM - 12:30 PM | ON THE VALUE OF DECAPOD DIVERSITY IN COMPARING WATER QUALITY IN TROPICAL HEADWATER STREAMS | 253 AB
ON THE VALUE OF DECAPOD DIVERSITY IN COMPARING WATER QUALITY IN TROPICAL HEADWATER STREAMS
All streams share some life-history attributes that are effective in comparing cross-site differences in water quality and food-web structure. However, recent studies demonstrate that some head-water habitats in tropical streams have food webs that are dominated by decapods (freshwater shrimps, crabs, crayfish and aeglas) rather than other types of benthic invertebrates. The life histories of these decapod crustaceans are different from each other. Dispersal, reproduction, and life span affect their function as detritivores, grazers, omnivores, and predators. Together their trophic interactions with other benthic invertebrates, especially aquatic insects, result in changes in the abundance if many other species populations. It is not yet clear how feeding selectivity by many types of decapods affects species that are frequently used to monitor water quality. These decapod populations and their dominance relationships have the potential to alter how current indices of biotic integrity are interpreted. We propose that use the existing data on changes in decapod distributions along with other benthic species will enhance effectiveness of benthic indicators of water quality. We review examples to illustrate that decapod life histories in tropical streams have distinct advantages for determining changes in water quality.
- Water Quality
- Ecotoxicology
- Functional Feeding Groups
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Presenters/Authors
Alan Covich
(), University of Georgia, alanc@uga.edu;
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Carol Yang
(), University of Georgia, carolyang214@gmail.com ;
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Omar Perez-Reyes
(), University of Puerto Rico- Rio Piedras, macrobrachium@gmail.com;
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Todd Crowl
(), Florida International University, facrowl@gmail.com;
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