Skip to Main Content
Assembly rules for functional groups of North American shrews: effects of geographic range and habitat partitioningAuthor(s): Timothy S. McCay; Matthew J. Lovallo; W. Mark Ford; Michael A. Menzel; Michael A. Menzel
Source: OIKOS. 107: 141-147.
Publication Series: Miscellaneous Publication
PDF: Download Publication (187.95 KB)
DescriptionWe examined the representation of shrew species within assemblages at 197 sites in the southern Appalachian Mountains, USA. Assemblages were classified according to representation of functional groups, including fossorial, small epigeal, and large epigeal. Average (9?SD) species richness was 2.99?1.0 and assemblages averaged 0.8 species in the fossorial and large epigeal groups and 1.3 species in the small epigeal group. Compliance with Fox?s assembly rule was evaluated by dividing sites into those likely under the rule (favored) and those unlikely under the rule. The number of favored sites was compared to expected numbers of favored sites under three null models of community development, which variously incorporated observed characteristics of species in the regional pool. Number of favored sites (175 [89%]) exceeded the number found in each of 25,000 sets of assemblages simulated (P<0.00004) using algorithms that incorporated the observed species richness of each site and the observed incidences of each species. However, the number of favored sites did not differ (P=0.1054) from the number expected when patterns of allopatry and sympatry were preserved in the null model. Thus, the tendency for the equitable representation of functional groups in shrew assemblages was primarily due to the pattern of allopatry among similar species, and we believe that the striking compliance of these sites with Fox?s assembly rule is largely due to structure within the regional pecies pool, rather than extant competitive interactions.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationMcCay, Timothy S.; Lovallo, Matthew J.; Ford, W. Mark; Menzel, Michael A. 2004. Assembly rules for functional groups of North American shrews: effects of geographic range and habitat partitioning. OIKOS. 107: 141-147.
- Woodland salamander and small mammal responses to alternative silvicultural practices in the Southern Appalachians of North Carolina
- Contiguous allopatry of the masked shrew and southeastern shrew in the Southern Appalachians: segregation along an elevational and habitat gradient
- Influence of elevation and forest type on community assemblage and species distribution of shrews in the central and southern Appalachian Mountains
XML: View XML