Heino Jani, Grönroos Mira
Finnish Environment Institute, Natural Environment Centre, Biodiversity, Paavo Havaksen Tie 3, 90570, Oulu, Finland.
Department of Environmental Sciences, Section of Environmental Ecology, University of Helsinki, Niemenkatu 73, 15140, Lahti, Finland.
Oecologia. 2017 Jan;183(1):151-160. doi: 10.1007/s00442-016-3754-7. Epub 2016 Oct 14.
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 groups.
最近有人提出，可以将β多样性划分为单个位点对总体β多样性的贡献（局部群落β多样性，LCBD），或者划分为单个物种对总体β多样性的贡献（物种群落β多样性，SCBD）。我们分别探讨了溪流昆虫群落中LCBD和SCBD与位点及物种特征的关系。我们发现，LCBD主要由物种丰富度的变化来解释，且检测到一种负相关关系。SCBD与各种物种特征密切相关，如占有率、丰度、生态位位置和生态位宽度，但与物种的生物学特性仅有微弱关联。特别是，占有率及其二次项与SCBD呈现出非常强的单峰关系，这表明在位点占有率方面处于中间水平的物种对β多样性的贡献最大。我们关于揭示位点或物种对总体β多样性贡献的研究结果，对于利用溪流昆虫群落进行群落生态学、保护和生物评估具有高度重要性，并且可能在其他生物类群中具有一些普遍规律。
