Chapter

Mayfly Population Density, Persistence and Genetic Structure in Fragmented Headwater Habitats

L. C. Alexander and W. O. Lamp

in International Advances in the Ecology, Zoogeography, and Systematics of Mayflies and Stoneflies

Published by University of California Press

Published in print June 2008 | ISBN: 9780520098688
Published online March 2012 | e-ISBN: 9780520943803 | DOI: http://dx.doi.org/10.1525/california/9780520098688.003.0003
Mayfly Population Density, Persistence and Genetic Structure in Fragmented Headwater Habitats

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This chapter investigates the effects of steam habitat loss and fragmentation on the density, genetic diversity, and persistence of Ephemerella inconstans in twenty-four steams across nine headwater stream networks in Maryland and Virginia. It discusses the differences in population density and local extinction in forested versus deforested headwater systems, and analyzes genetic diversity in populations of Ephemerella inconstans and three closely related species. The analysis reveals very low polymorphism across the entire two hundred kilometer range of the study, suggesting that a prehistoric bottleneck occurred in this species.

Keywords: Ephemerella inconstans; genetic diversity; persistence; headwater streams; Maryland; Virginia; population density; polymorphism

Chapter.  4238 words.  Illustrated.

Subjects: Zoology and Animal Sciences

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