Direct and indirect influences of 8yr of nitrogen and phosphorus fertilization on Glomeromycota in an alpine meadow ecosystem

Yongjun Liu, Guoxi Shi, Lin Mao, Gang Cheng, Shengjing Jiang, Xiaojun Ma, Lizhe An, Guozhen Du, Nancy Collins Johnson, Huyuan Feng

Research output: Contribution to journalArticle

162 Scopus citations

Abstract

• We measured the influences of soil fertility and plant community composition on Glomeromycota, and tested the prediction of the functional equilibrium hypothesis that increased availability of soil resources will reduce the abundance of arbuscular mycorrhizal (AM) fungi. • Communities of plants and AM fungi were measured in mixed roots and in Elymus nutans roots across an experimental fertilization gradient in an alpine meadow on the Tibetan Plateau. • As predicted, fertilization reduced the abundance of Glomeromycota as well as the species richness of plants and AM fungi. The response of the glomeromycotan community was strongly linked to the plant community shift towards dominance by Elymus nutans. A reduction in the extraradical hyphae of AM fungi was associated with both the changes in soil factors and shifts in the plant community composition that were caused by fertilization. • Our findings highlight the importance of soil fertility in regulating both plant and glomeromycotan communities, and emphasize that high fertilizer inputs can reduce the biodiversity of plants and AM fungi, and influence the sustainability of ecosystems.

Original languageEnglish (US)
Pages (from-to)523-535
Number of pages13
JournalNew Phytologist
Volume194
Issue number2
DOIs
StatePublished - Apr 2012

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Keywords

  • Alpine meadow ecosystem
  • Elymus nutans
  • Fertilization
  • Functional equilibrium
  • Mycorrhiza
  • Nitrogen
  • Phosphorus
  • Resource availability

ASJC Scopus subject areas

  • Plant Science
  • Physiology

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