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干旱区地理 ›› 2020, Vol. 43 ›› Issue (1): 190-200.doi: 10.12118/j.issn.1000-6060.2020.01.22

• 生态与环境 • 上一篇    下一篇

2000—2015年塔里木胡杨林国家级自然保护区NPP时空动态特征及其影响因素

赵俊红1,2，周华荣1，卢雅焱1,2，孙庆祥1,2   

  1. 1 中国科学院新疆生态与地理研究所，新疆乌鲁木齐830011； 2 中国科学院大学，北京100049
  • 收稿日期:2019-05-12 修回日期:2019-08-19 出版日期:2020-01-05 发布日期:2020-01-05
  • 通讯作者: 周华荣(1960-)，男，博士，研究员，研究方向为环境评价与景观生态.
  • 作者简介:赵俊红(1992-)，女，硕士研究生，研究方向为干旱区环境评价与生态规划. E-mail: zhaojunhong16@mails.ucas.ac.cn
  • 基金资助:

    国家自然科学基金项目（41171157）

Temporal-spatial characteristics and influencing factors of the vegetation net primary production in the National Nature Reserve of Populus euphratica in Tarim from 2000 to 2015

ZHAO Jun-hong1,2,ZHOU Hua-rong1,LU Ya-yan1,2,SUN Qing-xiang1,2   

  1. 1 Xinjiang Institute of Ecology and Geography,CAS,Urumqi 830011,Xinjiang, China; 2 University of Chinese Academy of Science,Beijing 100049,China
  • Received:2019-05-12 Revised:2019-08-19 Online:2020-01-05 Published:2020-01-05

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摘要： 以塔里木胡杨林国家级自然保护区为研究对象，基于植被NPP、气象、土地利用/覆盖、河流等数据，采用趋势分析、Mann-Kendall突变检验、地理探测器等方法，探究了塔里木胡杨林国家级自然保护区2000—2015年植被NPP时空变化特征及其影响因素。结果表明：（1） 在空间尺度上，塔里木胡杨林国家级自然保护区2000—2015年年均植被NPP为32.25 gC·m-2·a-1，变化范围在5.16~303.87 gC·m-2·a-1之间；年均NPP呈现出以塔里木河干流为带向周边波动递减的空间分布特征。（2） 在时间尺度上，16 a间保护区植被NPP呈现波动增长趋势，年均增加值为0.523 8 gC·m-2·a-1，在2001—2002年和2011—2012年出现突变性上升，2007—2008年出现突变性下降。（3） 影响植被NPP分异的核心因素为土地利用/覆盖、蒸散发、降水、河流缓冲区等，且由多因子协同作用造成；同时，地下水埋深对植被NPP变化有着重要影响。

关键词: 净初级生产力, 时空分布, 地理探测器, 塔里木胡杨林国家级自然保护区

Abstract: Net Primary Productivity (NPP) is an important indicator to characterize the production capacity and quality of terrestrial ecosystems. Previous studies are mainly based on large and middle scale units and pay more attention to semi-humid and humid areas, therefore we select National Nature Reserve of Populus euphratica in Tarim Basin, Xinjiang, China as the study area. Based on the NPP, climate, land use/land cover, river data and using trend analysis, Mann-Kendall test, correlation analysis and geographical detector methods, this paper analyzed the temporal-spatial characteristics and influencing factors of the vegetation net primary productiuity; temporal-spatial distribution; geodetector; National Nature Reserve of Populus euphratica in Tarim in the National Nature Reserve of Populus euphratica in Tarim from 2000 to 2015.The results are as follows: First,the average vegetation NPP from 2000 to 2015 was 32.25 gC·m-2·a-1 and ranged from 5.16-303.87 gC·m-2·a-1.The average NPP was declined as the belt form from the two wings of Tarim River to the place far away from the river. Different vegetation types contribute differently to annual vegetation NPP growth, and NPP tended to increase the most for broadleaf forest, but least for shrublands. Second, the NPP followed an overall trend of fluctuating growth with 0.523 8 gC·m-2·a-1 every year. The NPP had a sharp growth trend during the period from 2001 to 2002 and the period from 2011 to 2012 and drastically reduced during the period from 2007 to 2008.Last,there are many factors affecting NPP, mainly including land use/land cover, evapotranspiration, precipitation and river buffer zone, and the NPP changes were mainly caused by the synergistic effect of multiple factors. The groundwater depth had a significant influence on vegetation NPP. This study provides decision support for the ecological environment protection and governance of National Nature Reserve of Populus euphratica in Tarim Basin, and provides a reference frame for maintaining the ecosystem sustainability of the green ecological corridor in Tarim River.

Key words: net primary productiuity, temporal-spatial distribution, geodetector, National Nature Reserve of Populus euphratica in Tarim