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- Title
LAND USE, PRIMARY PRODUCTIVITY, AND LAKE AREA AS DESCRIPTORS OF ZOOPLANKTON DIVERSITY.
- Authors
Hoffmann, Michael D.; Dodson, Stanley I.
- Abstract
Two major ecological generalizations are that species richness increases monotonically with habitat size and that it is often a unimodal function of primary productivity. We performed a meta-analysis to test hypotheses that, in 41 well-studied lakes of the world, these patterns are an artifact of combining data from pristine and developed lakes. The monotonic species-area relationship was found in lakes in developed watersheds but not in pristine lakes. The richness-productivity relationship was significantly positive linear (not unimodal) for pristine lakes (typically low productivity) and marginally significant negative linear for developed lakes (typically high productivity). The previously reported unimodal relationship appeared only when data from pristine and developed lakes were combined. Watershed development (quadratic model) was the best single descriptor of richness for all lakes and for developed lakes. Our best regression model for all lakes included linear lake area, quadratic productivity, and quadratic development terms. In pristine lakes, species richness was best described by a positive linear function of lake productivity. In developed lakes, richness was best described by positive linear lake area, negative linear productivity, and linear and quadratic development terms. Our results raise the possibility that two fundamental biodiversity relationships in lakes are influenced by land use.
- Subjects
BIODIVERSITY; ZOOPLANKTON; WATERSHED management; LAKES; LAND use; ECOLOGY
- Publication
Ecology, 2005, Vol 86, Issue 1, p255
- ISSN
0012-9658
- Publication type
Article
- DOI
10.1890/03-0833