EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/24/2021 | 2:00 PM - 3:30 PM | GREAT LAKES INTERDUNAL WETLAND HABITAT IMPOSES RESISTANCE TO GENE FLOW ON THREE AQUATIC INSECT SPECIES OF DIFFERING DISPERSAL ABILITIES | Virtual Platform
GREAT LAKES INTERDUNAL WETLAND HABITAT IMPOSES RESISTANCE TO GENE FLOW ON THREE AQUATIC INSECT SPECIES OF DIFFERING DISPERSAL ABILITIES
Nested within Lake Michigan’s coastal dune ecosystem are interdunal wetlands, a unique and naturally fragmented habitat, occurring along a latitudinal gradient. We investigated whether differences in dispersal ability or environmental conditions along the Lake Michigan coastline determine population genetic structure of three aquatic insect species which have high (Anax junius), intermediate (Notonecta undulata), and low (Caenis amica) dispersal ability. We hypothesized that all insect populations experienced isolation-by-distance along the coastline, while the strength of this pattern increases with decreasing dispersal ability. We confirmed species identification using COI barcoding, and used RADseq to generate SNP data for population genetic analyses. We found that A. junius displays a significant isolation-by-distance relationship while N. undulata does not, and that both species display K=2 genetic clusters along the coastline with significant increases in genetic diversity with increasing latitude. The COI data revealed our Caenis samples included two different, but closely related species with a remarkably strong north-south species break along the coastline. Our results indicate that all three species occupying the same naturally fragmented habitat are subject to resistance to gene flow despite dispersal ability.
- Conservation
- Connectivity
- Habitat
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Presenters/Authors
Halle M. Nienhaus
(), Western Michigan University , halle.m.nienhaus@wmich.edu;
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Devin Bloom
(), Western Michigan University, devin.bloom@wmich.edu;
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Sarah W. Fitzpatrick
(), Western Michigan University, sfitz@msu.edu;
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Tiffany Schriever
(), Western Michigan University, tiffany.schriever@wmich.edu;
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