Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1007/s00442-013-2790-9
Volltext Shareable Link
Titel (primär) Tree diversity promotes functional dissimilarity and maintains functional richness despite species loss in predator assemblages
Autor Schuldt, A.; Bruelheide, H.; Durka, W. ORCID logo ; Michalski, S.G.; Purschke, O.; Assmann, T.
Journal / Serie Oecologia
Erscheinungsjahr 2014
Department BZF; iDiv
Band/Volume 174
Heft 2
Seite von 533
Seite bis 543
Sprache englisch
Keywords BEF China; Biodiversity; Ecosystem function; Invertebrate; Trophic interaction
UFZ Querschnittsthemen RU1;
Abstract The effects of species loss on ecosystems depend on the community’s functional diversity (FD). However, how FD responds to environmental changes is poorly understood. This applies particularly to higher trophic levels, which regulate many ecosystem processes and are strongly affected by human-induced environmental changes. We analyzed how functional richness (FRic), evenness (FEve), and divergence (FDiv) of important generalist predators—epigeic spiders—are affected by changes in woody plant species richness, plant phylogenetic diversity, and stand age in highly diverse subtropical forests in China. FEve and FDiv of spiders increased with plant richness and stand age. FRic remained on a constant level despite decreasing spider species richness with increasing plant species richness. Plant phylogenetic diversity had no consistent effect on spider FD. The results contrast with the negative effect of diversity on spider species richness and suggest that functional redundancy among spiders decreased with increasing plant richness through non-random species loss. Moreover, increasing functional dissimilarity within spider assemblages with increasing plant richness indicates that the abundance distribution of predators in functional trait space affects ecological functions independent of predator species richness or the available trait space. While plant diversity is generally hypothesized to positively affect predators, our results only support this hypothesis for FD—and here particularly for trait distributions within the overall functional trait space—and not for patterns in species richness. Understanding the way predator assemblages affect ecosystem functions in such highly diverse, natural ecosystems thus requires explicit consideration of FD and its relationship with species richness.
dauerhafte UFZ-Verlinkung
Schuldt, A., Bruelheide, H., Durka, W., Michalski, S.G., Purschke, O., Assmann, T. (2014):
Tree diversity promotes functional dissimilarity and maintains functional richness despite species loss in predator assemblages
Oecologia 174 (2), 533 - 543