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Digitale Medien

Spatial organization of a desert rodent community: food addition and species removal (1987)

Bowers, M. A. ; Thompson, D. B. ; Brown, J. H.

Springer

Oecologia 72 (1987), S. 77-82

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ISSN: 1432-1939

Schlagwort(e): Desert ; Rodent community ; Food addition

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Summary From 1977 through 1983 we conducted experiments on a desert rodent community where supplemental seeds were added or certain rodent species and ants were removed from 0.25-ha fenced plots in a Chihuahuan Desert site in southeastern Arizona, USA. In this paper we examine the patterns of microhabitat use relative to vegetative cover by 11 rodent species. The results show that: i) removal of the largest seed-eating species, Dipodomys spectabilis, produced the most pervasive and dramatic shifts in microhabitat use by the remaining rodent species; ii) adding seeds or removing ants had little effect on the spatial use of microhabitats by rodents in this community; and iii) non-granivores were just as likely as granivores to shift microhabitat use when other granivores were removed. We believe these results indicate that both food and foraging microsites are limited but the relegation of subdominant species to lesspreferred microhabitats by the large Dipodomys spectabilis is the major factor underlying the spatial organization of this community. Results also demonstrate that strong interactions among species increase the probability that pathways of indirect interactions through intermediary species are important; these complex linkages may include species that overlap little in food preferences.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00385048

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Digitale Medien

Mammalian arylsulfatases A and B: relative rates of hydrolysis of artificial substrates (1986)

Thompson, D. B. ; Daniel, W. L.

Springer

Cellular and molecular life sciences 42 (1986), S. 150-151

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ISSN: 1420-9071

Schlagwort(e): Arylsulfatase A ; arylsulfatase B ; 4-methylumbelliferyl sulfate ; rodent ; bovine