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File Fragmentation and Patch Size Shape Genetic Structure of Brook Trout Populations
We tested the relative influence of habitat patch size and connectivity on genetic structure and effective population size in eight brook trout (Salvelinus fontinalis) habitat patches in a watershed in Virginia, USA. Variation at eight microsatellite loci in 2229 young-of-the-year brook trout for two successive cohorts (2010 and 2011) was examined. Genetic differentiation across all populations was pronounced. Overall F'ST was 0.397 (95% CI: 0.322–0.525) and overall FST was 0.124 (95% CI: 0.096–0.159). Above-barrier patch size had a strong positive relationship with genetic diversity, Nˆ b, and genetic differentiation. Our analysis is consistent with greater extinction risk in smaller above-barrier patches. Larger above-barrier patches contained greater genetic diversity but reduced Nˆ b relative to adjacent below-barrier patches. The primary effect of barriers may be to reduce available above-barrier spawning habitat, even for larger above-barrier patches. Below-barrier patches also showed evidence of reduced genetic diversity and lack of connectivity. Genetic monitoring focused at gaining a broader understanding of the relationships here will be necessary to fully evaluate local extinction risks.
Located in Science and Data / Brook Trout Related Publications
File Fragmentation and Patch Size Shape Genetic Structure of Brook Trout Populations
We tested the relative influence of habitat patch size and connectivity on genetic structure and effective population size in eight brook trout (Salvelinus fontinalis) habitat patches in a watershed in Virginia, USA. Variation at eight microsatellite loci in 2229 young-of-the-year brook trout for two successive cohorts (2010 and 2011) was examined. Genetic differentiation across all populations was pronounced. Overall F'ST was 0.397 (95% CI: 0.322–0.525) and overall FST was 0.124 (95% CI: 0.096–0.159). Above-barrier patch size had a strong positive relationship with genetic diversity, Nˆ b, and genetic differentiation. Our analysis is consistent with greater extinction risk in smaller above-barrier patches. Larger above-barrier patches contained greater genetic diversity but reduced Nˆ b relative to adjacent below-barrier patches. The primary effect of barriers may be to reduce available above-barrier spawning habitat, even for larger above-barrier patches. Below-barrier patches also showed evidence of reduced genetic diversity and lack of connectivity. Genetic monitoring focused at gaining a broader understanding of the relationships here will be necessary to fully evaluate local extinction risks.
Located in Science and Data / Brook Trout Related Publications / Brook Trout Genetics Research
Brook Trout Genetics Research
Research studies related to Brook Trout genetics.
Located in Science and Data / Brook Trout Related Publications
Stream Assessment and Monitoring
Research publications related to assessing and monitoring streams.
Located in Science and Data / Brook Trout Related Publications
File C header Ranking Site Vulnerability to Increasing Temperatures in Southern Appalachian Brook Trout Streams in Virginia: An Exposure - Sensitivity Approach
Climate change vulnerability classification model for brook trout populations; brook trout populations are classified into one of four quadrants based on direct measurements or model predictions of sensitivity and exposure. Low exposure, low sensitivity populations are most likely to persist under various climate change scenarios.
Located in Science and Data / Brook Trout Related Publications
File EBTJV Business Plan, 2014-2018
The strategic intent of the EBTJV business plan is to raise broad awareness and understanding about the plight of coldwater habitat in the eastern portion of the U.S. – using the brook trout as a sentinel species – in order to build support for the actions required to conserve brook trout and sustain healthy waters.
Located in About EBTJV / EBTJV Management / EBTJV Business Plan
EBTJV Business Plan
The EBTJV business plan is focused on generating the financial resources and operational infrastructure that facilitates achievement of the partnership’s strategic conservation strategy for coldwater habitat throughout the historic eastern range of brook trout.
Located in About EBTJV / EBTJV Management
EBTJV Partnership Meeting June 12-13, 2013
This folder contains all materials from the EBTJV partnership meeting held on June 12-13, 2013 at the Appalachian Laboratory - University of Maryland.
Located in About EBTJV / EBTJV Partners / EBTJV Partnership Meetings
File EBTJV Organizational and Communications Assessment_2013
The EBTJV worked with River Network and Water Words That Work who were contracted to complete an organizational and communications assessment of our partnership; the final report summarizes the outcomes from these assessments.
Located in Projects / EBTJV Operational Evaluation Reports
File 2013 EBTJV All Partners Meeting Summary
This document provides a summary of the presentations and discussions that occurred during the 2013 EBTJV All Partners Meeting.
Located in About EBTJV / … / EBTJV Partnership Meetings / EBTJV Partnership Meeting June 12-13, 2013
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