Mycorrhizal type influences plant density dependence and species richness across 15 temperate forests,Ecology

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Mycorrhizal type influences plant density dependence and species richness across 15 temperate forests
Ecology ( IF 4.4 ) Pub Date : 2021-01-11 , DOI: 10.1002/ecy.3259
Feng Jiang _{1,

2} , James A. Lutz ₃ , Qingxi Guo _{1,

4} , Zhanqing Hao ₅ , Xugao Wang ₅ , Gregory S. Gilbert ₆ , Zikun Mao _{5,

7} , David A. Orwig ₈ , Geoffrey G. Parker ₉ , Weiguo Sang ₁₀ , Yankun Liu _{11,

12} , Songyan Tian _{11,

13} , Marc W. Cadotte _{2,

14} , Guangze Jin _{1,

4}

Affiliation

Center for Ecological Research Northeast Forestry University Harbin150040China
Department of Biological Sciences University of Toronto Scarborough Toronto OntarioM1C 1A4Canada
Wildland Resources Department Utah State University Logan UtahUT 84322USA
Key Laboratory of Sustainable Forest Ecosystem Management‐Ministry of Education Northeast Forestry University Harbin150040China
CAS Key Laboratory of Forest Ecology and Management Institute of Applied Ecology, Chinese Academy of Sciences Shenyang110164China
Environmental Studies Department University of California 1156 High Street Santa Cruz California95064USA
University of Chinese Academy of Sciences Beijing100049China
Harvard Forest Harvard University Petersham MassachusettsMA 01366USA
Forest Ecology Group Smithsonian Environmental Research Center Edgewater MarylandMD 21037USA
Institute of Botany Chinese Academy of Sciences Beijing100093China
Heilongjiang Forestry Engineering and Environment Institute Harbin150040China
Key Laboratory of Forest Ecology and Forestry Ecological Engineering of Heilongjiang Province Harbin, Heilongjiang150040China
National Positioning observation Station of Mudanjiang Forest Ecosystem in Heilongjiang Province Mudanjiang, Muling157500China
Ecology and Evolutionary Biology University of Toronto Toronto OntarioM5S 1A1Canada

Recent studies suggest that the mycorrhizal type associated with tree species is an important trait influencing ecological processes such as response to environmental conditions and conspecific negative density dependence (CNDD). However, we lack a general understanding of how tree mycorrhizal type influences CNDD strength and the resulting patterns of species abundance and richness at larger spatial scales. We assessed 305 species across 15 large, stem-mapped temperate forest dynamics plots in Northeastern China and North America to explore the relationships between tree mycorrhizal type and CNDD, species abundance, and species richness at a regional scale. Tree species associated with arbuscular mycorrhizal (AM) fungi showed a stronger CNDD and a more positive relationship with species abundance than did tree species associated with ectomycorrhizal (ECM) fungi. For each plot, both basal area and stem abundance of AM tree species was lower than that of ECM tree species, suggesting that AM tree species were rarer than ECM tree species. Finally, ECM tree dominance showed a negative effect on plant richness across plots. These results provide evidence that tree mycorrhizal type plays an important role in influencing CNDD and species richness, highlighting this trait as an important factor in structuring plant communities in temperate forests.

更新日期：2021-01-11

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