Influence of Catchment Disturbance on Pteronotropis euryzonus (Broadstripe Shiner) and Semotilus thoreauianus (Dixie Chub)

Autor:	Jack W. Feminella, Kelly O. Maloney, Richard M. Mitchell
Rok vydání:	2006
Předmět:	geography Broadstripe shiner Disturbance (geology) geography.geographical_feature_category biology Ecology Drainage basin STREAMS biology.organism_classification Pteronotropis Habitat Abundance (ecology) Environmental science Relative species abundance Ecology Evolution Behavior and Systematics
Zdroj:	Southeastern Naturalist. 5:393-412
ISSN:	1938-5412 1528-7092
Popis:	We examined relationships between catchment-scale disturbance from military training and two dominant fish species, Pteronotropis euryzonus (broadstripe shiner) and Semotilus thoreauianus (Dixie chub) in headwater streams at the Fort Benning Military Installation (FBMI), GA. Disturbance was estimated as the percent of the catchment that was bare ground and unpaved road cover. Relative abundance of broadstripe shiners and Dixie chubs were negatively and positively related to disturbance, respectively. This complementarity likely resulted from contrasting life histories, feeding behaviors, and habitat preferences between the two species. Absolute abundance of broadstripe shiners increased, whereas relative abundance of Dixie chubs decreased, with stream discharge, suggesting that both species were affected by local habitat conditions. Additionally, the average body size of both species was lower in high-disturbance streams, signifying that both species were affected by disturbance. Results also sug...
Databáze:	OpenAIRE
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