Acta Geographica Sinica ›› 2015, Vol. 70 ›› Issue (7): 1027-1040.doi: 10.11821/dlxb201507001

• Ecology and Environment •     Next Articles

Assessment of protection effectiveness of nature reserves on the Tibetan Plateau based on net primary production and the large-sample-comparison method

Yili ZHANG1,2(), Zhongjun HU1,2, Wei QI1,2(), Xue WU1,2, Wanqi BAI1, Lanhui LI1,2,3, Mingjun DING1,3, Linshan LIU1, Zhaofeng WANG1, Du ZHENG1   

  1. 1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. Key Lab of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China
  • Received:2015-03-20 Revised:2015-05-25 Online:2015-07-20 Published:2015-08-11
  • Supported by:
    Priority Research Program of Chinese Academy of Sciences, No.XDB03030500;National Key Technology Research and Development Program, No.2012BAC06B02;National Nature Sciences Foundation of China, No.41201095, No.41171080

Abstract:

A total of 21 typical coupled large samples were chosen from areas in the nature reserves and their surroundings on the Tibetan Plateau (TP) with large-sample-comparison method (LSCM). To evaluate the protection effectiveness of the nature reserves, we compared the alpine grassland net primary production (NPP) of these coupled samples and analyzed the differences between them before and after their establishment as protected areas. The results show that: (1) In view of alpine grassland NPP, the ecological and environmental conditions of most nature reserves were more fragile than those of their surrounding areas and also lower than the average values for the TP. (2) Of the 11 typical nature reserves selected, the positive trend of NPP in Manzetang is the most significant, while in Taxkorgan, the trend is not obvious. Moreover, with the exception of Selincuo, the annual NPP growth rate in nature reserves covered by meadow and herbaceous wetland is higher than that in nature reserves consisting of steppe and desert grassland. (3) Some notable findings existed in 21 typical coupled samples: (a) After the establishment of nature reserves, the annual NPP increase rate in 76% of samples inside nature reserves and 82% of samples inside national nature reserves are apparently higher than that of corresponding samples outside nature reserves. (b) The ecological protection effectiveness in Central Kunlun, Changshagongma, Zoige Wetland, and Siling Co nature reserves is significant; in most parts of the Three Rivers' Source and Qiangtang nature reserves, the protection effectiveness is relatively significant, while in south-east Manzetang and north Taxkorgan, the protection effectiveness is not obvious. (c) The ecological protection effectiveness is significant in nature reserves consisting of meadow; however, it is weak in nature reserves covered by steppe.

Key words: nature reserve, protection effectiveness, large-sample-comparison method, net primary production, Tibetan Plateau