Arid
DOI10.1023/A:1011122218548
Dispersion of kangaroo rat mounds at multiple scales in New Mexico, USA
Schooley, RL; Wiens, JA
通讯作者Schooley, RL
来源期刊LANDSCAPE ECOLOGY
ISSN0921-2973
出版年2001
卷号16期号:3页码:267-277
英文摘要

Burrowing mammals create disturbances that increase the ecological heterogeneity of landscapes. In desert systems, banner-tailed kangaroo rats (Dipodomys spectabilis) construct large mounds that greatly influence the spatial patterning of soils, plants, and animals. The overall effects of the patches generated by D. spectabilis depend on the dispersion patterns of the mounds; these patterns may be sensitive to scale and landscape position. We examined the distribution of D. spectabilis mounds across multiple scales in four 40-ha grassland plots in New Mexico, USA. We used Ripley’s K-function for our point-pattern analysis. The dispersion patterns of mounds were generally scale-sensitive but depended somewhat on plot-level densities, which were related to topographic position and grazing history. Mound spacing was either regular or random at small scales (0-50 m), random or aggregated at intermediate scales (50-300 m), and aggregated at large scales (300-3000 m). This scale-dependency of pattern reflected spatial domains in which different biotic (territoriality, dispersal, grazing) and abiotic (soil texture and drainage) factors exerted strong influences. How other organisms perceive the spatial patterning of mounds will depend on the extent of their movements. Patches may appear regular to one species but aggregated to another. The dispersion of D. spectabilis mounds also has implications for the spatial structuring of desert rodent communities. D. spectabilis excludes smaller species of kangaroo rats from areas around their mounds; they create spatial heterogeneity in behavioral dominance that may influence the distribution of subordinate species at multiple scales.


英文关键词burrows desert rodents Dipodomys spectabilis grazing K-function patch disturbances scale semiarid grasslands spatial point patterns
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000168194400006
WOS关键词DESERT RODENT COMMUNITY ; DIPODOMYS-SPECTABILIS ; CHIHUAHUAN DESERT ; SPATIAL-ORGANIZATION ; LONG-TERM ; GRASSLAND ; PATTERNS ; ECOLOGY ; POPULATION ; DISTURBANCES
WOS类目Ecology ; Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Environmental Sciences & Ecology ; Physical Geography ; Geology
来源机构Colorado State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/141432
作者单位(1)Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA
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Schooley, RL,Wiens, JA. Dispersion of kangaroo rat mounds at multiple scales in New Mexico, USA[J]. Colorado State University,2001,16(3):267-277.
APA Schooley, RL,&Wiens, JA.(2001).Dispersion of kangaroo rat mounds at multiple scales in New Mexico, USA.LANDSCAPE ECOLOGY,16(3),267-277.
MLA Schooley, RL,et al."Dispersion of kangaroo rat mounds at multiple scales in New Mexico, USA".LANDSCAPE ECOLOGY 16.3(2001):267-277.
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