Tree mycorrhizal associations mediate soil fertility effects on forest community structure in a temperate forest

Zikun Mao, Adriana Corrales, Kai Zhu, Zuoqiang Yuan, Fei Lin, Ji Ye, Zhanqing Hao, Xugao Wang

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Soil fertility influences plant community structure, yet few studies have focused on how this influence is affected by the type of mycorrhizal association formed by tree species within local communities. We examined the relationship of aboveground biomass (AGB) and diversity of adult trees with soil fertility (nitrogen, phosphorus, organic matter, etc.) in the context of different spatial distributions of arbuscular mycorrhizal (AM) and ectomycorrhizal (EM) trees in a temperate forest in Northeast China. Diversity showed a positive trend along the soil fertility gradient driven mostly by a positive relationship between AM tree abundance and soil fertility. By contrast, the AGB showed a negative trend along the soil fertility gradient driven mostly by a negative relationship between EM tree AGB and soil fertility. Furthermore, the opposite trend in the AGB and tree species diversity along the soil fertility gradient led to an overall negative diversity–biomass relationship at the 50-m scale but not the 20-m scale. These results suggest that tree mycorrhizal associations play a critical role in driving forest community structure along soil fertility gradients and highlight the importance of tree mycorrhizal associations in influencing how the diversity–ecosystem function (e.g. biomass) relationships change with soil fertility.

Original languageEnglish (US)
Pages (from-to)475-486
Number of pages12
JournalNew Phytologist
Volume223
Issue number1
DOIs
StatePublished - Jul 2019

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science

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