EBTJV

An Economic Analysis of Improved Road‐Stream Crossings: Road‐stream crossings, which include culverts and bridges, are an essential element of our transportation networks, allowing roads to pass over rivers and streams. Our communities and our economies depend on functioning road networks and safe crossings. We also depend on healthy rivers and streams for clean water, recreation, and a host of other benefits, and we are learning more about the relationships between road‐stream crossing designs and their effect on natural areas. Undersized or poorly designed crossings fragment streams and disrupt the natural movement of water, sediment and aquatic organisms, causing erosion and degraded habitat. The most problematic of these crossings prevent aquatic organisms, such as brook trout, from accessing the upstream habitat they need to survive and reproduce. Yet crossings can be designed to avoid these problems. Improved road‐stream crossings deliver social, economic and ecological benefits and are a key element of adapting our infrastructure to a changing climate. Unfortunately, their initial cost can be a significant obstacle for highway departments with limited budgets.
Located in Science and Data / Brook Trout Related Publications
Application Upper White River Habitat Restoration, Vermont: Application Upper White River Habitat Restoration, Vermont
Located in Projects / … / 2013 Projects / Upper White River Habitat Restoration, VT
Application Upper White River Habitat Restoration, Vermont: Application Upper White River Habitat Restoration, Vermont
Located in Funded Projects / EBTJV Projects / Upper White River Habitat Restoration, VT
Application Upper White River Habitat Restoration, Vermont: Application Upper White River Habitat Restoration, Vermont
Located in Funded Projects / EBTJV Projects
Assessing the Efficacy of Remediating Episodic Low pH (and High Aluminum) Concentrations in Headwater Brook Trout Streams with Clam Shell Additions_FY09 Project: This project demonstrated that clam shells could be utilized to increase pH and decrease detrimental inorganic aluminum concentrations. In Dead Stream, water chemistry has improved by approximately 1.0 pH unit, and total fish densities increased two-fold. In Canaan Brook water chemistry has improved by 1.0 pH unit and First Lake Stream improved by 0.7 pH unit, while fish densities have increased 2- and 6- times, respectively. Macroinvertebrate communities have improved somewhat, especially among mayflies and stoneflies, while amphipods and snails have appeared for the first time. However, even at treated sites, macroinvertebrate communities continue to have low diversity and may not achieve Class A water quality. Overall, by adding buffering capacity, there has been a boost to the bottom of the food chain which has contributed to improved fish abundance and diversity. In the fourth year, biological communities are still adapting to the new conditions.
Located in Projects / Project Completion Reports
Broad-Scale Patterns of Brook Trout Responses to Introduced Brown Trout in New York: Brook Trout Salvelinus fontinalis and Brown Trout Salmo trutta are valuable sport fish that coexist in many parts of the world due to stocking introductions. Causes for the decline of Brook Trout within their native range are not clear but include competition with Brown Trout, habitat alteration, and repetitive stocking practices. New York State contains a large portion of the Brook Trout’s native range, where both species are maintained by stocking and other management actions.We used artificial neural network models, regression, principal components analysis, and simulation to evaluate the effects of Brown Trout, environmental conditions, and stocking on the distribution of Brook Trout in the center of their native range. We found evidence for the decline of Brook Trout in the presence of Brown Trout across many watersheds; 22% of sampled reaches where both species were expected to occur contained only Brown Trout. However, a model of the direct relationship between Brook Trout and Brown Trout abundance explained less than 1% of data variation. Ordination showed extensive overlap of Brook Trout and Brown Trout habitat conditions, with only small components of the hypervolume (multidimensional space) being distinctive. Subsequent analysis indicated higher abundances of Brook Trout in highly forested areas, while Brown Trout were more abundant in areas with relatively high proportions of agriculture. Simulation results indicated that direct interactions and habitat conditions were relatively minor factors compared with the effects of repeated stocking of Brown Trout into Brook Trout habitat. Intensive annual stocking of Brown Trout could eliminate resident Brook Trout in less than a decade. Ecological differences, harvest behavior, and other habitat changes can exacerbate Brook Trout losses. Custom stocking scenarios with Brown Trout introductions at relatively low proportions of resident Brook Trout populations may be able to sustain healthy populations of both species within their present range.
Located in Science and Data / Brook Trout Related Publications
Chesapeake Bay Fish Passage Prioritization: An assessment of dams in the Chesapeake Bay watershed.
Located in Science and Data / Brook Trout Related Publications / Chesapeake Bay Brook Trout Management Strategy-References
Chesapeake Fish Passage Prioritization: An Assessment of Dams in the Chesapeake Bay Watershed: The Chesapeake Fish Passage Prioritization (CFPP or “the project”) project grew out of and builds on the conceptual framework of the Northeast Aquatic Connectivity.
Located in Science and Data / Brook Trout Related Publications
Dam Removals to Reconnect Brook Trout Habitat on an Unnamed Tributary to Frankstown Branch, PA: This project will remove two fish passage barriers to provide 1.33 miles of unrestricted fish passage to high-quality coldwater spawning and rearing habitat.
Located in Projects / 2006 - 2018 Projects / 2013 Projects
Dam Removals to Reconnect Brook Trout Habitat on an Unnamed Tributary to Frankstown Branch, PA: This project will remove two fish passage barriers to provide 1.33 miles of unrestricted fish passage to high-quality coldwater spawning and rearing habitat.
Located in Funded Projects / EBTJV Projects

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