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浙江大学学报（农业与生命科学版）
  2011, Vol. 37 Issue (6): 684-692    DOI: 10.3785/j.issn.1008-9209.2011.06.014
Resource & environmental sciences     
Dynamics of vegetation and its responses to terrain factors with Mann‐Kendall approach :a case study in Tiaoxi watershed , Taihu Lake
JIANG Zhen‐lan１ ,２ , JING Chang‐wei２ , LI Dan２ , YU Xiang２ , WU Jia‐ping２
1 . Department of Geographical Sciences , Minjiang University , Fuzhou 350108 , China ; 2 . College o f Environmental and Resource Sciences , Zhejiang University , Hangzhou 310058 , China
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Abstract  Mann‐Kendall approach was applied for characterizing the features and mechanisms of vegetation changes with time , elevation and slope in the Tiaoxi watershed , Taihu Lake region , Zhejiang Province , east China . The results indicated that the annual vegetation in the area fluctuated dramatically and showed a moderate trend of increase from ２０００to ２０１０, but in ２００４, the coverage dropped to the lowest level ; The variability of spatial distribution also showed a moderate trend of increase during the study period , with the spatial heterogeneity reaching the highest between ２００２and ２００４; the vegetation coverage kept increasing while the spatial heterogeneity decreased with the increment of elevation and slope . At elevation of about ２００ m or slope around １５ degrees , there were signs of catastrophe change .The results above reveal the trend of vegetation changes with time , elevation and slope , and identify when and where the catastrophes occur , which lays a sound basis for further study on the spatiotemporal dynamics of vegetation and its driving factors .

Published: 25 November 2011
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WU Jia‐ping
JING Chang‐wei
LI Dan
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JIANG Zhen‐lan
Cite this article:

JIANG Zhen‐lan, JING Chang‐wei, LI Dan, YU Xiang, WU Jia‐ping. Dynamics of vegetation and its responses to terrain factors with Mann‐Kendall approach :a case study in Tiaoxi watershed , Taihu Lake. , 2011, 37(6): 684-692.

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http://www.zjujournals.com/agr/10.3785/j.issn.1008-9209.2011.06.014     OR     http://www.zjujournals.com/agr/Y2011/V37/I6/684


运用Mann‐Kendall 方法探究地表植被变化趋势及其对地形因子的响应机制——— 以太湖苕溪流域为例

利用Mann‐Kendall 方法对浙江太湖苕溪流域植被随时间、高程、坡度序列变化的特征与机制进行分析.结果表明:在２０００ — ２０１０年间,植被随时间变化波动大,但该流域植被覆盖和空间变异均呈不显著增长趋势,２００４年植被覆盖最低,植被空间异质性在２００２ 年至２００４ 年间达到最高水平;植被覆盖随高程、坡度的增加而增长,植被空间变异随高程、坡度的增加呈下降趋势,在高程２００m 和坡度１５°区域有一突变点.该研究结果不仅揭示了植被随时间、高程、坡度的变化趋势,还揭示了植被发生突变的时间段、高程带、坡度带,为进一步研究植被时空变异规律及驱动因子奠定了基础.
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