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Relative condition of fish habitat in streams of the Eastern Gulf of Mexico States. Histogram shows percentage of total stream length in each condition class.
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Uses direct output files of Aquatic Gap Analysis Program (AGAP) fish distribution models and National Fish Habitat Partnership (NFHP) 2010 Habitat Condition Indicies (HCI) to make summarized conclusions of stream condition and fish biological potential for Level 3 Ecoregions across the Conterminous United States (CONUS). Initial AGAP and NFHP products were represented at the local catchment scale of the National Hydrography Dataset Plus Version 1 (NHDPlusV1). To summarize AGAP and NFHP data into Level 3 EcoRegions a length-weighted average was used (i.e. the cumulative HCI value for each river reach within an ecoregion was weighted by the reach length with the formula (H1*L1+H2*L2...+HX*LX)/(H1+H2...+HX) where...
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The stream systems of Hawai‘i are unique and home to many rare species, including five native fish and five native shellfish. These native species have amphidromous life cycles, meaning that they spend part of their lives in the ocean and part in freshwater streams. Stream flow serves as a vital natural pathway, connecting saltwater and freshwater habitats so that these animals can migrate between them and carry out critical life stages (e.g., development, reproduction). Over the last 20 years, the amount of rainfall in Hawai‘i has decreased, and climate models predict that this trend will continue. It is uncertain how reduced rainfall will affect stream flow and, consequently, the native stream species that depend...
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The overall goal of the Midwestern regional-scale assessment was to identify river reaches in the Glacial Lakes Partnership regions (focusing on Michigan, Minnesota, and Wisconsin) that are most vulnerable to potential impacts of projected climate and land use changes. Because fish assemblages are strongly influenced by river water temperature and flow regimes, which are in turn affected by climate and land-use conditions, we will attempt to model fish habitat response to climate and land use changes through changes in temperature and flow. This project intended to: (1) develop three models that predict daily summer temperature for all river reaches in each state; (2) develop a single model to predict non-winter...
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One goal of the National Scale Assessment included identifying regions and associated river reaches across the United States that are most vulnerable to projected climate and land use changes. As an initial attempt to characterize river system vulnerability, we followed the definition posed by Kasperson et al. (2006) that incorporates exposure of systems to stresses like climate and land use changes, sensitivity of systems to those changes, and system resilience. This project intended to provide (1) a framework of stream classification to assess vulnerability of fish habitat under future climate change, (2) a framework of stream classification to assess vulnerability of fish habitat with projected urban and agriculture...
    map background search result map search result map Projected Climate Change for the Conterminous United States (National Assessment) Projected Climate and Land Use Change Impacts on Aquatic Habitats in the Midwestern United States (Regional Assessment) Summarization of Stream Condition and Fish Biological Potential by Ecoregion Assessing the Impact of Future Climate on Hawai‘i’s Aquatic Ecosystems Eastern Gulf of Mexico States Risk of Current Degradation Chart (Stream Length) Assessing the Impact of Future Climate on Hawai‘i’s Aquatic Ecosystems Eastern Gulf of Mexico States Risk of Current Degradation Chart (Stream Length) Projected Climate and Land Use Change Impacts on Aquatic Habitats in the Midwestern United States (Regional Assessment) Summarization of Stream Condition and Fish Biological Potential by Ecoregion Projected Climate Change for the Conterminous United States (National Assessment)