Biodiversity loss underlies the dilution effect of biodiversity

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http://hdl.handle.net/10138/321486

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Halliday , F W , Rohr , J R & Laine , A-L 2020 , ' Biodiversity loss underlies the dilution effect of biodiversity ' , Ecology Letters , vol. 23 , no. 11 , pp. 1611-1622 . https://doi.org/10.1111/ele.13590

Title: Biodiversity loss underlies the dilution effect of biodiversity
Author: Halliday, Fletcher W.; Rohr, Jason R.; Laine, Anna-Liisa
Contributor: University of Helsinki, Research Centre for Ecological Change
Date: 2020-11
Language: eng
Number of pages: 12
Belongs to series: Ecology Letters
ISSN: 1461-023X
URI: http://hdl.handle.net/10138/321486
Abstract: The dilution effect predicts increasing biodiversity to reduce the risk of infection, but the generality of this effect remains unresolved. Because biodiversity loss generates predictable changes in host community competence, we hypothesised that biodiversity loss might drive the dilution effect. We tested this hypothesis by reanalysing four previously published meta-analyses that came to contradictory conclusions regarding generality of the dilution effect. In the context of biodiversity loss, our analyses revealed a unifying pattern: dilution effects were inconsistently observed for natural biodiversity gradients, but were commonly observed for biodiversity gradients generated by disturbances causing losses of biodiversity. Incorporating biodiversity loss into tests of generality of the dilution effect further indicated that scale-dependency may strengthen the dilution effect only when biodiversity gradients are driven by biodiversity loss. Together, these results help to resolve one of the most contentious issues in disease ecology: the generality of the dilution effect.
Subject: biodiversity
community structure
dilution effect
parasitism
LIFE-HISTORY
SPECIES-DIVERSITY
TRADE-OFFS
LAND-USE
DISEASE
RISK
RICHNESS
ECOLOGY
SYSTEMS
FRAGMENTATION
1181 Ecology, evolutionary biology
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