期刊
ECOLOGY LETTERS
卷 20, 期 4, 页码 505-512出版社
WILEY
DOI: 10.1111/ele.12754
关键词
Biodiversity; dilution effect; pathogens; community ecology; ecosystem ecology
类别
资金
- US National Science Foundation Long-Term Ecological Research Program (LTER) [DEB-0620652, DEB-1234162]
- Cedar Creek Ecosystem Science Reserve
- University of Minnesota
- Division Of Environmental Biology
- Direct For Biological Sciences [1234162] Funding Source: National Science Foundation
Plant diversity experiments generally find that increased diversity causes increased productivity; however, primary productivity is typically measured in the presence of a diverse food web, including pathogens, mutualists and herbivores. If food web impacts on productivity vary with plant diversity, as predicted by both theoretical and empirical studies, estimates of the effect of plant diversity on productivity may be biased. We experimentally removed arthropods, foliar fungi and soil fungi from the longest-running plant diversity experiment. We found that fungi and arthropods removed a constant, large proportion of biomass leading to a greater reduction of total biomass in high diversity plots. As a result, the effect of diversity on measured plant productivity was much higher in the absence of fungi and arthropods. Thus, diversity increases productivity more than reported in previous studies that did not control for the effects of heterotrophic consumption.
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