Butterfly, bee and forb community composition and cross-taxon incongruence in tallgrass prairie fragments |
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Authors: | Jessica D Davis Stephen D Hendrix Diane M Debinski Chiara J Hemsley |
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Institution: | (1) Department of Ecology, Evolution and Organismal Biology, Iowa State University, 253 Bessey Hall, Ames, IA 50011, USA;(2) Department of Biological Sciences, University of Iowa, 425 Biology Building, Iowa City, IA 52242, USA |
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Abstract: | Pollinators provide an important class of ecological services for crop plants and native species in many ecosystems, including
the tallgrass prairie, and their conservation is essential to sustaining prairie remnants. In Iowa these remnants are typically
either block-shaped or long, linear strips along transportation routes. In this study we examined differences in the butterfly,
bee, and forb community composition in linear and block prairie remnants, determined correlations between species diversity
among butterflies, bees and forbs in the 20 prairie remnants sampled, and examined correlations of community similarity among
butterflies, bees and forbs. Correspondence analysis showed that distinct communities exist for butterflies and forbs in block
versus linear sites and discriminant analysis showed that the bee and forb communities in block and linear sites can be distinguished
on the basis of a few species. Diversity of one group was a poor predictor of diversity in another, except for a significant
inverse relationship between bees and butterflies. These two pollinator taxa may be responding very differently to microhabitat
components within fragmented ecosystems. Our studies show that there need to be differences in conservation strategies for
bees and butterflies to maintain both pollinator communities. |
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Keywords: | Bees Butterflies Correspondence analysis Cross-taxon congruence Prairies |
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