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Acta Prataculturae Sinica ›› 2022, Vol. 31 ›› Issue (5): 144-155.DOI: 10.11686/cyxb2021372

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Vegetation community structure and diversity in a burned area of Picea asperata-Abies fabri forest on different aspects on the northeastern margin of the Qinghai-Tibetan Plateau

Xiao-lei ZHOU1(), Yue-e YAN2, Jing ZHANG3, Xu-jiao ZHOU4, Yong-qin YAN5, Fu-qiang YANG1, Xue-ping CAO1, An ZHAO1, Yan-li ZHAO1, Jing-yi SU1   

  1. 1.College of Forestry,Gansu Agricultural University,Lanzhou 730070,China
    2.Information Center,Forestry Inventory and Planning Institute of Gansu Province,Lanzhou 730020,China
    3.College of Science,Gansu Agricultural University,Lanzhou 730070,China
    4.Pratacultural College,Gansu Agricultural University,Lanzhou 730070,China
    5.Garden Administration Bureau of Baiyin City,Baiyin 730900,China
  • Received:2021-10-09 Revised:2021-10-29 Online:2022-05-20 Published:2022-03-30
  • Contact: Xiao-lei ZHOU

Abstract:

In this study, we conducted field surveys to determine the composition and diversity of the plant community in a burned area of Picea asperata-Abies fabri forest on the northeastern margin of the Qinghai-Tibetan Plateau. Non-metric multidimensional scaling methods were used to analyze the data. Twenty-two families, 40 genera, and 46 species were identified in the burned areas. The dominant families were Compositae (11), Ranunculaceae (6), Apiaceae (4), Polygonaceae (3), Rubiaceae (2), Gentianaceae (2), Rosaceae (2), and Caprifoliaceae (2). Different communities were distributed on slopes with different aspects: a Cystopteris montana+Carex crebra+Ligularia botryodes community on the north-facing (N) slope, a C. crebra+C. montana+Fragaria vesca community on the northwest-facing slope, a C. crebra+ F. vesca+Fargesia spathacea community on the northeast-facing slope, and a C. crebra+F. vesca+L. botryodes community on the east-facing (E) slope. The community on the N slope had the highest Margalef’s richness index and Shannon-Wiener diversity values, while the community on E slopes had the highest Simpson’s dominance index. There were no significant differences in Pielou’s evenness index of vegetation among the four different slopes. A gradient distribution pattern of vegetation existed on the different slopes, and there was some overlap among community distributions. The extent of vegetation cover decreased from the cloudy slope (N) to the semi-sunny slope (E). The slopes were ranked, from highest values of Margalef’s richness index and Shannon-Wiener diversity index to lowest, as follows: N>NW>NE>E.

Key words: burned area, Picea asperata-Abies fabri forest, alpine meadow, community structure, diversity