2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/24/2018 | 11:15 AM - 11:30 AM | WHO IS ON MY ROCK?: THE ECOLOGICAL AND EVOLUTIONARY DYNAMICS OF AQUATIC INSECTS CROSSING LOTIC-LENTIC BOUNDARIES IN THE LAKES BASIN, SIERRA NEVADA, CALIFORNIA | 420 A
WHO IS ON MY ROCK?: THE ECOLOGICAL AND EVOLUTIONARY DYNAMICS OF AQUATIC INSECTS CROSSING LOTIC-LENTIC BOUNDARIES IN THE LAKES BASIN, SIERRA NEVADA, CALIFORNIA
While the fauna of lakes and streams are frequently studied, surprisingly little is known about species that inhabit both lentic and lotic habitats. In this study, we examined how lake and stream environments affect ecological and evolutionary processes among these boundary-crossing species.
We documented the presence of larvae of two aquatic insects known from lotic habitats, the water penny beetle, Eubrianax edwardsii, and the caddisfly, Heteroplectron californicum, in a number of high elevation lakes in the Sierra Nevada mountains. Additionally, we found the caddisfly Limnephilus externus in both lotic and lentic habitats, and noted the occurrence of distinct communities of microinvertebrates, including Chironomid midges and Acari mites, in phoretic association with the caddisfly and its cases.
We observed differences between lentic and lotic populations with regards to larval morphology, genetic variation, and stable isotope signatures among these three insect species, indicating that lakes and streams produce distinct evolutionary pressures on species that inhabit both habitats.
Ongoing work is investigating genetic differences among the three lotic-lentic species across the Sierra Nevada and the nature of the association between the microinvertebrates on the cases and abdomen of Limnephilus.
- Evo-eco Dynamics
- Lentic
- Biological Gradients & Thresholds
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Presenters/Authors
Christine Parisek
(), University of California, Davis, cparisek@csustan.edu;
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Michael Marchetti
(), Saint Mary's College of California, mpm9@stmarys-ca.edu;
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Matthew Cover
(), California State University, Stanislaus, mcover@csustan.edu;
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