2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/26/2021 | 8:30 AM - 10:30 AM | FUNCTIONAL FEEDING GROUPS AS SURROGATES FOR ECOSYSTEM ATTRIBUTES IN TROPICAL AND TEMPERATE STREAMS | Virtual Platform
FUNCTIONAL FEEDING GROUPS AS SURROGATES FOR ECOSYSTEM ATTRIBUTES IN TROPICAL AND TEMPERATE STREAMS
The functional feeding groups (FFGs) approach to classify aquatic macroinvertebrates is extensively used in stream ecology. The FFGs classification combines morphological and behavioural adaptations of the organisms that link them to their food resources. Consequently, changes in the ecosystem that modify the food resource availability can be represented by FFGs. Merritt et al. (2002, 2017) proposed using FFGs proportions as surrogates for five ecosystem attributes across geographical regions. A set of 31 neotropical, 55 paleotropical and 37 temperate first-order streams was used to calculate the ecosystem attributes. All streams had a predominance of transported over the deposited organic matter and stable substrates. Neotropical and paleotropical streams were more heterotrophic, had a weaker association with the riparian environment, and a stronger predation control than temperate streams. Because biomass is usually a better predictor of ecosystem function than abundance, we compared the ecosystem attributes calculated as abundances plus biomass in one neotropical and one temperate stream. The attributes of both streams had significant (7 to 91%) differences. The use of FFGs proportions as surrogates for ecosystem attributes is a valuable tool for evaluating key ecological aspects and differences between geographical regions.
- Stream
- Tropical
- Biodiversity
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Presenters/Authors
Daniela Cortes Guzman
(), Universidad Nacional Autónoma de México, dacortesgu@unal.edu.co;
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Javier Alcocer
(), Universidad Nacional Autónoma de México, jalcocerdurand@gmail.com;
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Kenneth W Cummins
(), Michigan State University, kc8161@gmail.com;
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