Rocky Mountain Research Station Publications
RMRS Online Publication - Journal
Articles, External Publications, and Special Reports
Influence of small-scale disturbances by kangaroo rats on Chihuahuan Desert ants
Schooley, R. L.; Bestelmeyer, B. T.; Kelly, J. F. 2000. Influence of small-scale disturbances by kangaroo rats on Chihuahuan Desert ants. Oecologia. 125: 142-149.
Banner-tailed kangaroo rats (Dipodomys spectabilis) are prominent ecosystem engineers that build large mounds that influence the spatial structuring of fungi, plants, and some ground-dwelling animals. Ants are diverse and functionally important components of arid ecosystems; some species are also ecosystem engineers. We investigated the effects of patch disturbances created by D. spectabilis mounds on ant assemblages in a Chihuahuan Desert grassland in southern New Mexico by using pitfall traps in a paired design (mound vs. matrix). Although the disturbances did not alter species richness or harbor unique ant communities relative to the matrix, they did alter species composition; the abundances of 6 of 26 species were affected. The disturbances might also act to disrupt spatial patterning of ants caused by other environmental gradients. In contrast to previous investigations of larger-scale disturbances, we detected no effects of the disturbances on ants at the functional-group level. Whether ant communities respond to disturbance at a functional-group or within-functional-group level may depend on the size and intensity of the disturbance. Useful functional-group schemes also may be scale-dependent, however, or species may respond idiosyncratically. Interactions between disturbance-generating mammals and ants may produce a nested spatial structure of patches.
Keywords: ecosystem engineers, disturbances, formicidae, Heteromyidae, spatial scale
About PDFs: For best results, do not open the PDF in your Web browser. Right-click on the PDF link to download the PDF file directly to your computer. Click here for more PDF help.
PDF File Size: 85 K
Title: RMRS Other
Publications: Influence of small-scale disturbances by kangaroo
rats on Chihuahuan Desert ants
Electronic Publish Date: March 24, 2008
Last Update: March 24, 2008
RMRS Publications | Order a publication | Contact Us