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Redd (nest) surveys for resident brook trout (Salvelinus fontinalis) were conducted annually in a mountain lake in northern New York for 11 years with multiple surveys conducted during the spawning season in eight of those years. Elevated temperatures in summer were correlated with a delay in spawning and a reduction in the total number of redds constructed. Increasing the summer mean of maximum daily air temperatures by 1 °C delayed spawning by approximately 1 week and decreased the total number of redds constructed by nearly 65.
Located in Science and Data / Brook Trout Related Publications
Brook trout habitat vulnerability was assessed within an Appalachian watershed. • Increased discharge largely offset effects of increased air temperature. • No consistent loss of suitable brook trout habitat by end of 21st century • However, periods of low flow resulted in a loss of habitat at the network-scale. • Persistence of refugia below tributaries should enable metapopulation persistence.
Located in Science and Data / Brook Trout Related Publications
We directly measured paired air and water temperatures in watersheds (N = 77) containing reproducing populations of brook trout in Virginia. We found that paired air and water temperature relationships are highly variable among patches but are a useful dataset to classify sensitivity and vulnerability of existing brook trout patches. We developed a classification system using sensitivity and vulnerability metrics that classified sampled brook trout habitats into four categories (High Sensitivity- High Vulnerability (51.9%); High Sensitivity-Low Vulnerability (10.4%); Low Sensitivity-High Vulnerability (7.8%); Low Sensitivity-Low Vulnerability (29.9%). Our direct measurement approach identified potential refugia for brook trout at lower elevations and with higher air temperatures than previous larger scale modeling efforts.
Located in Science and Data / Brook Trout Related Publications
We used a 18-year brook trout (Salvelinus fontinalis) data set with samples across a ~4800 km2 spatial area in the Central Appalachian Mountains, combined with PRISM climate data at the HUC-12 subwatershed level to investigate temporal trends of each. his work provides long-term evidence to help understand the dynamics of these sentinel headwater fish populations as they experience a changing climate.
Located in Science and Data / Brook Trout Related Publications
Brook Trout Climate Resilience Research
Research on climate change relevant to brook trout
Located in Science and Data