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Vegetation patterns and nature reserve construction in an extremely-arid desert in Anxi, NW China's Gansu Province.

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Title: Vegetation patterns and nature reserve construction in an extremely-arid desert in Anxi, NW China's Gansu Province.
Authors: Liu Hong-yan, Xu Li-hong, Chen Chang-du, Cui Hai-ting, Xu Xing-ying
Source: Journal of Environmental Sciences (IOS Press). Jul2002, Vol. 14 Issue 3, p380. 8p. 3 Graphs, 3 Maps.
Subjects: Vegetation & climate, Nature reserves, Deserts
Geographic Terms: China
Abstract: Abstract: Anxi County is located in the northwestern part of the Hexi Corridor in Gansu Province and has the sole national level nature reserve of extremely-arid desert in China. Phytosociological methods (Braun-Blanquet, 1964) are used to classify plant community types in this area. Eleven are distinguished, including six of deserts, four of oases and one transitional type between deserts and oases. Direct gradient analysis (DCA) is employed to correlate the distribution of plant communities to physiogeographic conditions. This study makes clear that water is the most important ecological factor for the distribution of plant species and communities in this area. The effects of water have been demonstrated in different ways. A vegetation gradient from lower altitude to higher altitude in the southern part of the reserve is driven by a precipitation gradient. The effects of the depth of ground water table contribute to the differentiation of vegetation from desert to oasis in the flat area. In a finer scale, the washed gullies have obviously higher species richness and also higher vegetation cover than the surround gobi surfaces, possibly caused by the effects of floods. The vegetation patterns demonstrate that the area of Anxi County is a complete landscape unit. The range of the current nature reserve is not large enough for the purpose of conserving the unique biodiversity in this area. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Environmental Sciences (IOS Press) is the property of IOS Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Vegetation patterns and nature reserve construction in an extremely-arid desert in Anxi, NW China's Gansu Province.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Liu+Hong-yan%22">Liu Hong-yan</searchLink><br /><searchLink fieldCode="AR" term="%22Xu+Li-hong%22">Xu Li-hong</searchLink><br /><searchLink fieldCode="AR" term="%22Chen+Chang-du%22">Chen Chang-du</searchLink><br /><searchLink fieldCode="AR" term="%22Cui+Hai-ting%22">Cui Hai-ting</searchLink><br /><searchLink fieldCode="AR" term="%22Xu+Xing-ying%22">Xu Xing-ying</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Environmental+Sciences+%28IOS+Press%29%22">Journal of Environmental Sciences (IOS Press)</searchLink>. Jul2002, Vol. 14 Issue 3, p380. 8p. 3 Graphs, 3 Maps.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Vegetation+%26+climate%22">Vegetation & climate</searchLink><br /><searchLink fieldCode="DE" term="%22Nature+reserves%22">Nature reserves</searchLink><br /><searchLink fieldCode="DE" term="%22Deserts%22">Deserts</searchLink>
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  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22China%22">China</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: Anxi County is located in the northwestern part of the Hexi Corridor in Gansu Province and has the sole national level nature reserve of extremely-arid desert in China. Phytosociological methods (Braun-Blanquet, 1964) are used to classify plant community types in this area. Eleven are distinguished, including six of deserts, four of oases and one transitional type between deserts and oases. Direct gradient analysis (DCA) is employed to correlate the distribution of plant communities to physiogeographic conditions. This study makes clear that water is the most important ecological factor for the distribution of plant species and communities in this area. The effects of water have been demonstrated in different ways. A vegetation gradient from lower altitude to higher altitude in the southern part of the reserve is driven by a precipitation gradient. The effects of the depth of ground water table contribute to the differentiation of vegetation from desert to oasis in the flat area. In a finer scale, the washed gullies have obviously higher species richness and also higher vegetation cover than the surround gobi surfaces, possibly caused by the effects of floods. The vegetation patterns demonstrate that the area of Anxi County is a complete landscape unit. The range of the current nature reserve is not large enough for the purpose of conserving the unique biodiversity in this area. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Environmental Sciences (IOS Press) is the property of IOS Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 8
        StartPage: 380
    Subjects:
      – SubjectFull: Vegetation & climate
        Type: general
      – SubjectFull: Nature reserves
        Type: general
      – SubjectFull: Deserts
        Type: general
      – SubjectFull: China
        Type: general
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      – TitleFull: Vegetation patterns and nature reserve construction in an extremely-arid desert in Anxi, NW China's Gansu Province.
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            NameFull: Liu Hong-yan
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            NameFull: Xu Li-hong
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            NameFull: Chen Chang-du
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            NameFull: Cui Hai-ting
      – PersonEntity:
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            NameFull: Xu Xing-ying
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            – D: 01
              M: 07
              Text: Jul2002
              Type: published
              Y: 2002
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              Value: 14
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            – TitleFull: Journal of Environmental Sciences (IOS Press)
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