Influence of biophysical factors and differences in Ojibwe reservation versus Euro-American social histories on forest landscape change in northern Wisconsin,USA |
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Authors: | Michelle M Steen-Adams David J Mladenoff Nancy E Langston Feng Liu Jun Zhu |
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Institution: | (1) Department of Environmental Studies, University of New England, 11 Hills Beach Road, Biddeford, ME 04005, USA;(2) Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, USA;(3) Gaylord Nelson Institute for Environmental Studies, University of Wisconsin-Madison, 550 North Park Street, Madison, WI 53706, USA;(4) Department of Statistics and Entomology, University of Wisconsin-Madison, 1300 University Avenue, Madison, WI 53706, USA |
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Abstract: | Landscape ecology studies have demonstrated that past modifications of the landscape frequently influence its structure, highlighting
the utility of integrating historical perspectives from the fields of historical ecology and environmental history. Yet questions
remain for historically-informed landscape ecology, especially the relative influence of social factors, compared to biophysical
factors, on long-term land-cover change. Moreover, methods are needed to more effectively link history to ecology, specifically
to illuminate the underlying political, economic, and cultural forces that influence heterogeneous human drivers of land-cover
change. In northern Wisconsin, USA, we assess the magnitude of human historical forces, relative to biophysical factors, on
land-cover change of a landscape dominated by eastern white pine (Pinus strobus L.) forest before Euro-American settlement. First, we characterize land-cover transitions of pine-dominant sites over three
intervals (1860–1931; 1931–1951; 1951–1987). Transition analysis shows that white pine was replaced by secondary successional
forest communities and agricultural land-covers. Second, we assess the relative influence of a socio-historical variable (“on-/off-Indian
reservation”), soil texture (clay and sand), and elevation on land-cover transition. On the Lake Superior clay plain, models
that combine socio-historical and biophysical variables best explain long-term land-cover change. The socio-historical variable
dominates: the magnitude and rate of land-cover change differs among regions exposed to contrasting human histories. Third,
we developed an integrative environmental history-landscape ecology approach, thereby facilitating linkage of observed land-cover
transitions to broader political, economic, and cultural forces. These results are relevant to other landscape investigations
that integrate history and ecology. |
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