Authors: Jani Heino Mira Grönroos
Publish Date: 2016/10/14
Volume: 183, Issue: 1, Pages: 151-160
Abstract
It was recently suggested that beta diversity can be partitioned into contributions of single sites to overall beta diversity LCBD or into contributions of individual species to overall beta diversity SCBD We explored the relationships of LCBD and SCBD to site and species characteristics respectively in stream insect assemblages We found that LCBD was mostly explained by variation in species richness with a negative relationship being detected SCBD was strongly related to various species characteristics such as occupancy abundance niche position and niche breadth but was only weakly related to biological traits of species In particular occupancy and its quadratic terms showed a very strong unimodal relationship with SCBD suggesting that intermediate species in terms of site occupancy contribute most to beta diversity Our findings of unravelling the contributions of sites or species to overall beta diversity are of high importance to community ecology conservation and bioassessment using stream insect assemblages and may bear some overall generalities to be found in other organism groupsThis research was supported by grants from the Academy of Finland Maj and Tor Nessling Foundation and Kone Foundation We thank Sylvain Dolédec Jari Ilmonen and Lauri Paasivirta for insect body size information and Tommi Karhu Maija Niva and Heikki Mykrä for help with the field and laboratory work We also thank Jamie Kneitel and two anonymous reviewers for excellent comments on earlier drafts of the manuscript
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