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Chinese Journal of Applied Ecology ›› 2021, Vol. 32 ›› Issue (5): 1717-1725.doi: 10.13287/j.1001-9332.202105.010

• Original Articles • Previous Articles     Next Articles

Species-abundance distribution patterns of Quercus aliena var. acutiserrata forest in Taibai Mountain, China.

YU Wen1, SONG Wen-chao2,3, GUO Yi-chun2,3, ZHANG Hou-fa2,3, YAN Yan1*, ZHANG Shuo-xin1,4   

  1. 1College of Forestry, Northwest A&F University, Yangling 712100, Shaanxi China;
    2Key Laboratory of Climate Adaptation City, Shangluo 726000, Shaanxi, China;
    3Shangluo Meteorological Bureau, Shangluo 726000, Shaanxi, China;
    4Qinling National Forest Ecosystem Research Station, Yangling 712100, Shaanxi, China
  • Received:2020-10-15 Accepted:2021-02-21 Online:2021-05-15 Published:2021-11-15
  • Contact: *E-mail: yanyanemail@nwafu.edu.cn
  • Supported by:
    Open Research Found of Key Laboratory of Climate Adaptation City, Shangluo Meteorological Bureau (SLSY2019006), the National Natural Science Foundation of China (31700380) and the Fundamental Research Funds for the Central Universities (2452016139).

Abstract: The statistical model (log-normal model), niche models (Zipf model, broken stick mo-del, niche preemption model), and neutral model were used to fit the species-abundance distribution patterns based on the measurements of environmental factors and inventory data of trees with DBH≥1 cm in a 1.5 hm2 plot in the primary forest (PF) and a 1.5 hm2 plot in the secondary forest (SF). The results showed that species-abundance distribution was affected by habitat heterogeneity in Q. aliena var. acutiserrata forest. Topography had a predominant impact on the species-abundance distribution in PF. Species distribution was affected by both neutral and niche processes, with neutral process having a less prominent effect in large convexity habitats. While the neutral model was rejected by the K-S and Chi-square test in low convexity habitats, the species-abundance distribution satisfied the assumption of niche theory. Niche process and neutral process were equally important in the community in areas with steep slopes, while niche differentiation was the dominant in flat areas. In SF, the main factors affecting species distribution were soil nutrients. The niche process was the mainly ecological process affected species-abundance distribution in habitats with high soil available phosphorus, while the niche and neutral processes existed simultaneously in habitats with low soil phosphorus availability. There was a significant scale effect on the species-abundance distribution pattern of Q. aliena var. acutiserrata forests in Taibai Mountain. The niche and neutral processes could protect the species-abundance distribution at the 20 m×20 m scale in PF, while the niche process could explain the species-abundance distribution at the 40 m×40 m and 70 m×70 m scales. The niche and neutral processes combined acted on the species abundance distribution at the 20 m×20 m, 40 m×40 m and 70 m×70 m scales in SF, with niche process being more important than neutral process. Moreover, besides the scale and habitat heterogeneity, the species-abundance distribution patterns of Q. aliena var. acutiserrata forests differed significantly between primary forest and secondary forest under anthropogenic disturbance.

Key words: Quercus aliena var. acutiserrata forest, species-abundance distribution pattern, scale, habitat heterogeneity