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Habitat heterogeneity, habitat associations, and rodent species diversity in a sand-shinnery-oak landscape

, : Habitat heterogeneity, habitat associations, and rodent species diversity in a sand-shinnery-oak landscape. Journal of Mammalogy ust; 83(3): 743-753

The habitat-heterogeneity hypothesis states that an increase in habitat heterogeneity leads to an increase in species diversity. Although community-level analyses of effects of habitat heterogeneity on species diversity are important, they do not reveal the mechanism through which heterogeneity affects diversity. In contrast, habitat associations of particular species suggest a potential mechanism whereby diversity is affected by habitat heterogeneity. The sand-shinnery-oak ecosystem of southwestern United States contains 2 habitat types: blowouts and matrix. Blowouts are small and infrequent wind-formed open patches without shrubs. These disturbances are surrounded by a dense shrub-dominated matrix, mostly containing the low stature oak, Quercus havardii. Habitat associations of particular species with respect to blowouts versus matrix were assessed using capture frequencies and species abundances. Only Dipodomys ordii was more abundant in blowouts than in surrounding matrix, and this only occurred during summer. This seasonal change could be a consequence of competition or predation. All other species showed a preference for the matrix. Considerations of scale and edge effects between blowouts and matrix may provide additional insight into habitat associations of rodents, leading to a deeper understanding of the mechanistic basis of diversity in this ecosystem.


DOI: 10.1644/1545-1542(2002)083<0743:hhhaar>;2

Other references

Campbell, Russell B., 1996: The coalescent in the presence of selection. Bulletin of the Ecological Society of America 77(3 SUPPL PART 2): 68

Murphy, P.L.; Albert, S.M.; Weber, C.M.; Del Bene, M.L.; Rowland, L.P., 2000: Impact of spirituality and religiousness on outcomes in patients with ALS. The Project of Death in America Study at Columbia Presbyterian Medical Center enrolled 121 patients with ALS from 1996 through 1997, 46 of whom participated in a study assessing the effects of religiousness and spirituality (attachment to life, me...

Liao, S.K.; Wang, C.H.; Perng, Y.P.; Perng, I.M.; Chow, K.C., 1997: NPC-BM1, a human nasopharyngeal carcinoma cell line derived from a bone marrow metastasis with sustained expression of IL-2 beta and gamma receptors. Proceedings of the American Association for Cancer Research Annual Meeting 38(0): 303

Li, X.; Leteurtre, F.; Sergere, J.C.; Legoue, C.; Carosella, E.D.; Gluckman, E., 1997: Telomere shortening and telomerase activation in Fanconis anemia. Blood 90(10 SUPPL 1 PART 1): 438A-439A, Nov 15

Ilewicz, L.; Scheller, S.; Chruścuel, H.; Bily-Pryga, Z.; Korycińska-Wrońska, W.; Kalebka, P., 1982: Further trials of using ethanol-extracted propolis (EEP) in the treatment of various diseases of the teeth and oral mucosa. Czasopismo Stomatologiczne 35(11): 749-753

Souza, N.S. de; Zambolim, L., 1987: Varietal resistance of rice (Oryza sativa) to glume blight (Phoma sorghina). Of 49 cultivars screened against 2 isolates in the glasshouse, 11 were resistant to isolate 1, and 10 to isolate 2, while 23 showed intermediate reaction to both. Douradinho, M 39 and L 50 were the most resistant to isolate 1, and Perola, M 39, Li...

Drake, J.M., 2004: Allee effects and the risk of biological invasion. The Allee effect is a nonlinear phenomenon exhibited in the population dynamics of sparse populations in which the per capita population growth rate increases with increasing population density. In sufficiently sparse populations, the Allee effect...

Spencer, A.N.; Satterlie, R.A., 1980: Electrical and dye coupling in an identified group of neurons in a coelenterate. A compressed network of "giant" neurons, lying within the inner nerve-ring of the hydrozoan jellyfish Polyorchis, functions as the overall pattern generator and the motor neuron system for the subumbrellar swimming musculature. The neuro...

Gaitanakis P., 1977: Facies succession and tectonics of pre-Alpine nappes between Enns Valley and Steyr Valley; northern Limestone Alps, Upper Austria. Mitteilungen der Gesellschaft der Geologie- und Bergbaustudenten in Wien 24: 189-201

DuPorte, E.M., 1957: The comparative morphology of the insect head. Annual Review of Entomology Palo Alto, 2: 55-70