Impact factors on distribution and characteristics of natural plant community in reclamation zones of Changjiang River estuary

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• 作者：Yongguang Sun (1) (2)
  Xiuzhen Li (1)
  Yanlong He (1)
  Yue Jia (1)
  Zhigang Ma (1)
  Wenyong Guo (1)
  Zaijun Xin (1)
  
• 关键词：natural plant communities ; soil properties ; land use patterns ; reclamation time ; Changjiang River estuary
• 刊名：Chinese Geographical Science
• 出版年：2012
• 出版时间：April 2012
• 年：2012
• 卷：22
• 期：2
• 页码：154-166
• 全文大小：827KB
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• 作者单位：Yongguang Sun (1) (2)
  Xiuzhen Li (1)
  Yanlong He (1)
  Yue Jia (1)
  Zhigang Ma (1)
  Wenyong Guo (1)
  Zaijun Xin (1)
  
  1. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200062, China
  2. Department of History, Culture and Tourism, Gannan Normal University, Ganzhou, 341000, China
  
• ISSN：1993-064X

文摘

To identify impact factors on the distribution and characters of natural plants community in reclamation area, with survey data from 67 plant quadrats in July 2009, soil properties data from 216 sampling points in April 2009, and TM (30 m) data in 2006, the composition and characteristics of natural plants community in different time of the Fengxian area in the Changjiang (Yangtze) River estuary were analyzed with two-way indicator species analysis (TWINSPAN), multivariate analysis of variance (MANOVA), detrended canonical correspondence analysis (DCCA) and canonical correspondence analysis (CCA). The results show that: 1) The plant communities in the reclaimed area are mainly mesophytes and helophytic-mesophytic transitional communities, showing a gradient distribution trend with the change in reclamation years. Species richness (MA), species diversity (H) and above-ground biomass also increase with the increase of reclamation years. Nevertheless, they appear to decline slightly in the middle and late reclamation period (> 30 years). 2) With the rise in land use levels, the changes in species richness and species diversity tend to increase at first and then decrease; species dominance (D), however, tends to decline; and above-ground biomass increases slightly. 3) The distribution of the plant community is mainly influenced by the following factors: land use levels (R = 0.55, p < 0.05), soil moisture (R = 0.53, p < 0.05), soil salinity (R = 0.43, p < 0.05) and reclamation time (R = 0.40, p < 0.05).