Journal
SCIENCE
Volume 366, Issue 6461, Pages 124-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aau1361
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Funding
- National Key Research and Development Program of China [2017YFA0605103]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB31030000]
- NSFC [31270495]
- Youth Innovation Promotion Association of CAS [2013058]
- NSF US-China Dimensions of Biodiversity grants [DEB-1046113, DEB-1241136]
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The mechanisms underlying interspecific variation in conspecific negative density dependence (CNDD) are poorly understood. Using a multilevel modeling approach, we combined long-term seedling demographic data from a subtropical forest plot with soil fungal community data by means of DNA sequencing to address the feedback of various guilds of soil fungi on the density dependence of trees. We show that mycorrhizal type mediates tree neighborhood interactions at the community level, and much of the interspecific variation in CNDD is explained by how tree species differ in their fungal density accumulation rates as they grow. Species with higher accumulation rates of pathogenic fungi suffered more from CNDD, whereas species with lower CNDD had higher accumulation rates of ectomycorrhizal fungi, suggesting that mutualistic and pathogenic fungi play important but opposing roles.
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