Filters: Tags: patch (X)
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Mountain streams provide important habitats for many species, but their faunas are especially vulnerable to climate change because of ectothermic physiologies and movements that are constrained to linear networks that are easily fragmented. Effectively conserving biodiversity in these systems requires accurate downscaling of climatic trends to local habitat conditions, but downscaling is difficult in complex terrains given diverse microclimates and mediation of stream heat budgets by local conditions. We compiled a stream temperature database (n = 780) for a 2500-km river network in central Idaho to assess possible trends in summer temperatures and thermal habitat for two native salmonid species from 1993 to 2006....
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Boise River basin,
Ecological Applications,
Ecological Society of America,
Idaho,
Oncorhynchus mykiss,
This map shows the current distribution of species assemblages for the ecoregion, typified by the type of environment each species assemblage is usually found (soil, tree type, or specific place). The input datasets used in the associated geospatial modeling are also included.These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate....
In addition to current distribution of each terrestrial group species, this map shows their current and near-term status within the ecoregion. Current, long-term, and summary bioclimate data is also include for several of these terrestrial group species. The input datasets used in the distribution model are also included. These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications...
Conclusions: Assessments of metapopulation structure must consider landscape pattern, but also the non-linear responses of organisms to such patterns Thresholds/Learnings: Synopsis: This study used beetles to empirically test the reliability of neutral percolation models to predict critical thresholds of landscape connectivity. Beetle movements declined sharply when grass cover dropped below 20% of the experimental plot. The findings of this study differed from what was predicted by the model, indicating that landscape connectivity is not dependent on spatial pattern alone, but is also highly dependent how individual organisms move within and among patches depending on the amount of cover. The results suggest that...
Categories: Publication;
Types: Citation;
Tags: Colorado,
Landscape Connectivity,
Landscape fragmentation,
Natural cover heterogeneity,
beetles,
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