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Important Anadromous Fish Habitat, including Salmon, Northeast U.S.

Dates

Creation
2017-06-01 19:28:30
Last Update
2017-10-17 18:25:13
End Date
2016
End Date
2008

Citation

North Atlantic Landscape Conservation Cooperative(administrator), Renee Farnsworth, North Atlantic LCC(Originator), 2017-06-01(creation), 2017-10-17(lastUpdate), 2016(End), 2008(End), Important Anadromous Fish Habitat, including Salmon, Northeast U.S.

Summary

NOTE - This map contains two datasets: "Important Anadromous Fish Habitat, Northeast U.S." and "Atlantic Salmon Rearing Areas, Maine"These dataset are part of a suite of products from the Nature’s Network project (naturesnetwork.org). Nature’s Network is a collaborative effort to identify shared priorities for conservation in the Northeast, considering the value of fish and wildlife species and the natural areas they inhabit. "Important Anadromous Fish Habitat" and “Atlantic Salmon Rearing Areas, Maine” are two input used in developing “Lotic Core Areas, Stratified by Watershed, Northeast U.S.” that is also part of Nature’s Network. Lotic core areas represent intact, well-connected rivers and stream reaches in the Northeast and Mid-Atlantic [...]

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Imp_Anad_Fish.zip 35.51 MB
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Purpose

Important Anadromous Fish Habitat - This dataset is one of a suite of products from the Nature’s Network project (naturesnetwork.org). The Important Anadromous Fish Habitat dataset is intended to identify some of the most important stream and river reaches in the North Atlantic and Mid-Atlantic region for anadromous fish, based on habitat for Atlantic sturgeon, shortnose sturgeon, sea-run (salter) brook trout, alewife, blueback herring, and American shad. This dataset is primarily intended to be used in conjunction with the Nature’s Network product “Lotic Core Areas, Stratified by Watershed, Northeast U.S.” to better understand the importance of core areas to anadromous fish. It also can be used on its own, or in conjunction with an Atlantic salmon dataset also available through Nature’s Network, to identify priority watersheds for anadromous fish. Atlantic Salmon Rearing Areas- This dataset is one of a suite of products from the Nature’s Network project (naturesnetwork.org). The model was developed using data from habitat surveys conducted in the Machias, Sheepscot, Dennys, Sandy, Piscataquis, Mattawmkeag, and Soudabscook Rivers. The model uses reach slope derived from contour and digital elevation model (DEM) datasets, cumulative drainage area, and physiographic province to predict the total amount of rearing habitat within a reach. The variables included in the model explain 73% of the variation in rearing habitat.

Rights

As with any project carried out across such a large area, this dataset is subject to limitations. The results by themselves are not a prescription for on-the-ground action; users are encouraged to verify, with field visits and site-specific knowledge, the value of any areas identified in the project. Known issues and uncertainties include the following (see Dauwalter et al. 2012 for additional information about limitations): -The results do not incorporate important social, economic, or feasibility factors. -Fish distributions are known to be dynamic over time, and the distribution data represent a snapshot in time. -Likewise, the historical distributions of species are inherently difficult to define. The absence of a species from a subwatershed should not be considered absolute until additional, local data sources can be referenced. -The location and impacts of dams on aquatic connectivity are known to be incomplete across the region and this limits the ability to accurately prioritize watersheds for conservation. Other issues such as errors in mapping and alignment of hydrography, impervious surfaces, and a number of other data layers can affect the results of the alosid prioritization. -The models is based primarily on variables derived from a digital elevation model, and results are affected by uncertainties associated with the digital elevation model as well as other unmeasured factors that may also affect the suitability of stream reaches for salmon. -The model is intended to depict potential suitability of habitat for salmon, and does not take into account the presence of dams and other barriers that currently may limit access of salmon to rivers and streams.

Additional Information

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