2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/23/2019 | 9:00 AM - 9:15 AM | HABITAT STABILITY DIFFERENTIALLY DRIVES MASS-LENGTH RELATIONSHIPS AND TROPHIC TRAITS ACROSS FUNCTIONAL FEEDING GROUPS IN THE ECUADORIAN ANDES | 250 AB
HABITAT STABILITY DIFFERENTIALLY DRIVES MASS-LENGTH RELATIONSHIPS AND TROPHIC TRAITS ACROSS FUNCTIONAL FEEDING GROUPS IN THE ECUADORIAN ANDES
Individual traits and community-wide measures uncover community assembly mechanisms, although intraspecific variation may complicate these relationships. Specifically, trophic trait variation could influence mass-length relationships, as more flexible consumers may maintain their body condition across environmental gradients. In this work, we leverage the steep environmental gradients of the Ecuadorian Andes to identify the drivers of both mass-length relationships and trophic traits within and across functional feeding groups. Mass-length regressions were steeper at less stable streams for Andesiops mayflies (variation in slopes up to 76%) and hydrobiosid predatory caddisflies (variation in slopes up to 82%), but not for Baetodes mayflies, filter-feeding blackflies or for hydropsychid generalist caddisflies. C:N of all five taxonomic groups was not driven by environmental variables, with higher variation within than among taxa. However, %C decreased with elevation for predatory caddisflies (Hydrobiosidae) and increased with elevation in generalist caddisflies (Hydropsychidae). Community-wide isotopic nestedness was low among all five taxa and did not vary along environmental gradients. This flexibility in both their trophic traits and mass-length relationships along elevation and stability gradients suggests that trait plasticity could play a crucial role in stream insect responses to changing environmental conditions.
- Disturbance
- Functional Feeding Groups
- Isotope
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Presenters/Authors
Erin Larson
(), Alaska Pacific University, ern.larson@gmail.com;
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Andrea C. Encalada
(), Instituto BIOSFERA, Universidad San Francisco de Quito, Cumbayá, Ecuador Biológicas y Ambientales, Universidad San Francisco de Quito, Cumbaya, Ecuador, aencalada@usfq.edu.ec;
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Nicholas Hudson
(), Cornell University, nlh44@cornell.edu ;
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Alexander Flecker
(), Cornell University, Ithaca, NY, USA, asf3@cornell.edu;
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