2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/22/2019 | 9:30 AM - 9:45 AM | PHYLOGEOGRAPHY AND POPULATION GENETICS OF A HEADWATER SPECIALIST, CAMBARUS PRISTINUS (DECAPODA: CAMBARIDAE) FROM THE CUMBERLAND PLATEAU IN TENNESSEE | 254 B
PHYLOGEOGRAPHY AND POPULATION GENETICS OF A HEADWATER SPECIALIST, CAMBARUS PRISTINUS (DECAPODA: CAMBARIDAE) FROM THE CUMBERLAND PLATEAU IN TENNESSEE
Habitat loss and fragmentation represent significant threats to North American crayfish diversity. Understanding genetic diversity can aid conservation decisions by assessing impacts from habitat fragmentation and identifying historical and contemporary factors contributing to geographic structure. Our objective is to examine variation in mitochondrial DNA (COI) and alleles (microsatellites) to provide estimates of phylogeographic relationships and contemporary levels of genetic structure within Cambarus pristinus, a species of conservation concern and habitat specialist endemic to the Cumberland Plateau in Tennessee. We detected 12 haplotypes and recovered two independent haplotype networks that differed by 11 mutations. One network included the nominal form of C. pristinus; the second included the long-recognized, but undescribed “Sequatchie” form. These were recovered as separate, well-supported clades, indicating long-standing isolation between the forms and supporting recognition of the “Sequatchie” form as a distinct taxon. Lack of definable geographic structure within the nominal form suggests historic connectivity of those populations. An ongoing assessment of genotypic data will examine contemporary connectivity and diversity in the nominal form. Using historical and contemporary perspectives will provide a robust baseline for effective conservation actions.
- Invertebrate
- Assessment
- Conservation
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Presenters/Authors
Brooke Grubb
(), Austin Peay State University, Center of Excellence in Field Biology, Clarksville, TN, bgrubb@my.apsu.edu;
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John Johansen
(), Austin Peay State University, johansenj@apsu.edu;
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Rebecca Blanton Johansen
(), Austin Peay State University, Center of Excellence in Field Biology, Clarksville, TN, johansenr@apsu.edu;
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