Patch occupancy of stream fauna across a land cover gradient in the southern Appalachians, USA

By: , and 



We modeled patch occupancy to examine factors that best predicted the prevalence of four functionally important focal stream consumers (Tallaperla spp., Cambarus spp.,Pleurocera proxima, and Cottus bairdi) among 37 reaches within the Little Tennessee River basin of the southern Appalachian Mountains, USA. We compared 34 models of patch occupancy to examine the association of catchment and reach scale factors that varied as a result of converting forest to agricultural or urban land use. Occupancy of our taxa was linked to parameters reflecting both catchment and reach extent characteristics. At the catchment level, forest cover or its conversion to agriculture was a major determinant of occupancy for all four taxa. Patch occupancies of Tallaperla, Cambarus, and C. bairdi were positively, and Pleurocera negatively, correlated with forest cover. Secondarily at the reach level, local availability of large woody debris was important forCambarus, availability of large cobble substrate was important for C. bairdi, and stream calcium concentration was important for P. proxima. Our results show the abundance of stream organisms was determined by the taxon-dependent interplay between catchment- and reach-level factors.

Study Area

Publication type Article
Publication Subtype Journal Article
Title Patch occupancy of stream fauna across a land cover gradient in the southern Appalachians, USA
Series title Hydrobiologia
DOI 10.1007/s10750-016-2695-9
Volume 773
Issue 1
Year Published 2016
Language English
Publisher Springer
Contributing office(s) Coop Res Unit Seattle
Description 13 p.
First page 163
Last page 175
Country United States
State Georgia, North Carolina
Other Geospatial Little Tenneessee River Basin
Online Only (Y/N) N
Additional Online Files (Y/N) N
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