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Arlene P. Olivero

This report describes an initiative undertaken by the Nature Conservancy of Canada–Atlantic Region to strengthen freshwater conservation efforts in the Canadian portion of the Northern Appalachian–Acadian ecoregion. With the assistance of a core team of freshwater experts from both the United States and Canada, a hierarchical classification of rivers and streams was developed and mapped using five biophysical characteristics that affect the distribution of aquatic biodiversity: size, gradient, temperature, alkalinity, and tidal influence. A standardized classification was then developed for all watersheds in New Brunswick, Nova Scotia, Prince Edward Island, and eastern Quebec, as well as for those watersheds that...
Citation: Olivero-Sheldon, A. and M.G. Anderson. 2016. Northeast Lake and Pond Habitat Guide. The Nature Conservancy, Eastern Conservation Science, Eastern Regional Office. Boston, MA.The aquatic habitat guides are a companion to the Northeast Lake and Pond Classification (Olivero and Anderson, 2016; available at http://nature.ly/NElakes) and is an addition to the Northeast Habitat Guides: A Companion to the Terrestrial and Aquatic Habitat Maps (Anderson et al. 2013).The guides provide users with a compact fact sheet describing each of the mapped habitats, and providing information on the ecology and conservation status of the habitat, including: Map of the regional distribution Photos of example habitat Description...
We developed a mapped classification of lakes and ponds based on variables that structure lacustrine natural communities and that could be mapped consistently across Northeastern US. The classification was built upon four key attributes: water temperature, trophic state, alkalinity, and depth. Water temperature was mapped into three classes (very cold, cold, and warm-cool) to reflect the requirements and limits of aquatic organisms. Trophic states, representing the productivity of a lake, were mapped into two classes (oligomesotrophic -mesotrophic and eutrophic- hypereutrophic). Alkalinity was grouped into three classes (high, medium, low) to reflect how well the lake system was buffered from acidification. Depth...
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