Grassland Degradation Decrease the Diversity of Arbuscular Mycorrhizal Fungi Species in Tibet Plateau

  • Xiao-Bu CAI Department of Resources and Environment, Tibet Agricultural and Animal Husbandry College, Tibet, 860000
  • Yue-Lin PENG Department of Plant Science, Tibet Agricultural and Animal Husbandry College, Tibet, 860000
  • Min-Na YANG Department of Plant Science, Tibet Agricultural and Animal Husbandry College, Tibet, 860000
  • Tao ZHANG Institute of Grassland Science, Northeast Normal University, Key Laboratory of Vegetation Science, Ministry of Education, Changchun, 130024, China
  • Qiang ZHANG Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101

Abstract

Arbuscular mycorrhizal (AM) fungi play a vital role in restoration of an ecosystem. Grassland degradation in alpine steppe is severe, but the influence of grassland degradation on AM fungi composition in Tibetan Plateau is still not well understood. This research studied the diversity of arbuscular mycorrhizal fungi in degraded alpine steppe, dominated by Stipa purpurea. The results showed that the species richness and abundance of AM fungi in degraded grasslands significantly decreased. In different typical grasslands species, diversity of AM fungi genus Glomus was much higher than other genera (Acaulospora and Scutellospora). Compared with normal grassland, the AM fungal species diversity in moderately degraded grassland decreased by 30%, but in lightly degraded and severely degraded grassland, it highly increased with 15.3% and 13.3%, respectively. The species diversity of genus Glomus in moderately degraded grassland and lightly degraded grassland were higher than for normal grassland. Significant differences were observed in a relative abundance of common dominant species among different degraded grasslands. The proportion of dominant species highly increased with the aggravation of grassland degradation. The results suggest that the grassland mild degradation increased the adaptability and stress resistance of species.

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Published
2014-12-02
How to Cite
CAI, X.-B., PENG, Y.-L., YANG, M.-N., ZHANG, T., & ZHANG, Q. (2014). Grassland Degradation Decrease the Diversity of Arbuscular Mycorrhizal Fungi Species in Tibet Plateau. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 42(2), 333-339. https://doi.org/10.15835/nbha4229458
Section
Research Articles