Canadian Forest Service Publications
Fine-scale structure and cross-taxon congruence of bird and beetle assemblages in an old-growth boreal forest mosaic. 2009. Azeria, E.T.; Fortin, D.; Lemaître, J.; Janssen, P.; Hébert, C.; Darveau, M.; Cumming, S.G. Global Ecology and Biogeography 18(3): 333-345.
Issued by: Laurentian Forestry Centre
Catalog ID: 29505
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Nestedness occurs when species present in depauperate sites are subsets of those found in species-rich sites. The degree of congruence of site nestedness among different assemblages can inform commonalities of mechanisms structuring the assemblages. Well-nested assemblages may still contain idiosyncratic species and sites that notably depart from the typical assemblage pattern. Idiosyncrasy can arise from multiple processes, including interspecific interactions and habitat preferences, which entail different consequences for species co-occurrences. We investigate the influence of fine-scale habitat variation on nestedness and idiosyncrasy patterns of beetle and bird assemblages. We examine community-level and pairwise species co-occurrence patterns, and highlight the potential influence of interspecific interactions for assemblage structure.