� Springer-Verlag 2006 Abstract We present Mapcurves, a quantitative goodness-of-fit (GOF) method... more � Springer-Verlag 2006 Abstract We present Mapcurves, a quantitative goodness-of-fit (GOF) method that unambiguously shows the degree of spatial concordance between two or more categorical maps. Mapcurves graphically and quantitatively evaluate the degree of fit among any number of maps and quantify a GOF for each polygon, as well as the entire map. The Mapcurve method indicates a perfect fit
Results are presented of a study conducted under the aegis of the Interior Columbia Basin Ecosyst... more Results are presented of a study conducted under the aegis of the Interior Columbia Basin Ecosystem Management Project. A mesoscale (map scale = 1:24 000) scientific assessment change in spatial patterns of forest and rangeland landscapes of the interior Columbia River basin is ...
Atmospherically deposited sulfur (S) causes stream water acidification throughout the eastern U.S... more Atmospherically deposited sulfur (S) causes stream water acidification throughout the eastern U.S. Southern Appalachian Mountain (SAM) region. Acidification has been linked with reduced fitness and richness of aquatic species and changes to benthic communities. Maintaining acid-base chemistry that supports native biota depends largely on balancing acidic deposition with the natural resupply of base cations. Stream water acid neutralizing capacity (ANC) is maintained by base cations that mostly originate from weathering of surrounding lithologies. When ambient atmospheric S deposition exceeds the critical load (CL) an ecosystem can tolerate, stream water chemistry may become lethal to biota. This work links statistical predictions of ANC and base cation weathering for streams and watersheds of the SAM region with a steady-state model to estimate CLs and exceedances. Results showed that 20.1% of the total length of study region streams displayed ANC <100 μeq∙L(-1), a level at which...
� Springer-Verlag 2006 Abstract We present Mapcurves, a quantitative goodness-of-fit (GOF) method... more � Springer-Verlag 2006 Abstract We present Mapcurves, a quantitative goodness-of-fit (GOF) method that unambiguously shows the degree of spatial concordance between two or more categorical maps. Mapcurves graphically and quantitatively evaluate the degree of fit among any number of maps and quantify a GOF for each polygon, as well as the entire map. The Mapcurve method indicates a perfect fit
Results are presented of a study conducted under the aegis of the Interior Columbia Basin Ecosyst... more Results are presented of a study conducted under the aegis of the Interior Columbia Basin Ecosystem Management Project. A mesoscale (map scale = 1:24 000) scientific assessment change in spatial patterns of forest and rangeland landscapes of the interior Columbia River basin is ...
Atmospherically deposited sulfur (S) causes stream water acidification throughout the eastern U.S... more Atmospherically deposited sulfur (S) causes stream water acidification throughout the eastern U.S. Southern Appalachian Mountain (SAM) region. Acidification has been linked with reduced fitness and richness of aquatic species and changes to benthic communities. Maintaining acid-base chemistry that supports native biota depends largely on balancing acidic deposition with the natural resupply of base cations. Stream water acid neutralizing capacity (ANC) is maintained by base cations that mostly originate from weathering of surrounding lithologies. When ambient atmospheric S deposition exceeds the critical load (CL) an ecosystem can tolerate, stream water chemistry may become lethal to biota. This work links statistical predictions of ANC and base cation weathering for streams and watersheds of the SAM region with a steady-state model to estimate CLs and exceedances. Results showed that 20.1% of the total length of study region streams displayed ANC <100 μeq∙L(-1), a level at which...
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