Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2022, Vol. 30 ›› Issue (1): 188-195.DOI: 10.11733/j.issn.1007-0435.2022.01.023

Previous Articles    

Spatiotemporal Pattern of Vegetation Net Primary Productivity (NPP) and Its Response to Climate Change in Qilian Mountains during the past 16 Years

LAN Yun-fei1,2,3, LI Chuan-hua3,4   

  1. 1. Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China;
    2. Academy of Disaster Risk Science, Beijing Normal University, Beijing 100875, China;
    3. College of Geography and Environment Science, Northwest Normal University, Lanzhou, Gansu Province 730070, China;
    4. Key Laboratory of Resource Environment and Sustainable Development of Oasis, Lanzhou, Gansu Province 730070, China
  • Received:2021-06-03 Revised:2021-07-17 Published:2022-01-27

近16年祁连山植被NPP时空格局及其对气候变化的响应

兰云飞1,2,3, 李传华3,4   

  1. 1. 北京师范大学地理科学学部，北京 100875;
    2. 北京师范大学灾害风险科学研究院，北京 100875;
    3. 西北师范 大学地理与环境科学学院，甘肃 兰州 730070;
    4. 甘肃省绿洲资源环境与可持续发展重点实验室，甘肃 兰州 730070
  • 通讯作者: 李传华, E-mail: lch_nwnu@126.com
  • 作者简介:兰云飞(2001-)，男，云南临沧人，硕士研究生，主要从事气候变化研究，E-mail: 17393157392@163.com
  • 基金资助:
    国家自然科学基金项目(41761083)资助

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Abstract: In order to explore the spatiotemporal pattern of vegetation net primary productivity (NPP) in Qilian Mountains and its relationship with climate change, based on the MOD17A3HGF, the temperature and precipitation raster dataset, this study calculated spatiotemporal variation of the vegetation NPP in Qilian Mountains from 2000 to 2015, and then used correlation analysis to study the response of vegetation NPP to temperature and precipitation. The results showed that, overall, the spatial distribution of multi-year average NPP value in Qilian Mountains gradually decreased from east to west during the past 16 years, which was consistent with the trend of hydrothermal distribution. The valley area of Huangshui River Basin had good hydrothermal conditions, so the mutil-year average NPP value could reach more than 600 gC·m-2·a-1; the central and western region was mainly deserts, bare rocks and glaciers, and the natural environment was poor, the mutil-year average NPP value was close to 0. Under the influence of temperature and precipitation, NPP in Qilian Mountains fluctuated and increased by 13.2%;the area that increased significantly and extremely significantly could reach 23% and 20%, which mainly distributed in Huangshui Valley and Lenglongling Mountain. The regions which significantly decreased and extremely significantly decreased were less than 1%. NPP was mainly positively correlated with temperature and precipitation, and the high value area that positively correlated with temperature was relatively large, which was related to the overall high altitude, low temperature and cold, the main limiting factors for plant growth of Qilian Mountains.

Key words: Net Primary Productivity, Climate change, ANUSPLIN interpolation, Qilian Mountains

摘要： 为探究祁连山植被净初级生产力(Net primary productivity，NPP)的时空格局及其与气候变化的关系，本文基于MOD17A3HGF、气温与降水栅格数据集，计算了2000—2015年祁连山植被NPP的时空变化，并利用相关分析研究了NPP对气温和降水的响应，结果表明：近16年祁连山NPP均值分布整体上自东向西逐渐减少，与水热分布的趋势一致，湟水流域河谷地带水热条件较好，多年NPP均值可达600 gC·m-2·a-1以上，中西部地区以荒漠、裸岩和冰川为主，自然环境恶劣，多年NPP均值接近于0；受气温和降水的共同影响，NPP呈波动增加的趋势，增加幅度达13.2%；显著增加和极显著增加的区域达23%和20%，主要分布在湟水谷地、冷龙岭等地；显著减少和极显著减少的区域不到1%；NPP与气温和降水均以正相关为主，与气温呈正相关分布的高值区面积较大，这与祁连山整体海拔较高，低温寒冷是其植物生长的主要限制因素有关。

关键词: 净初级生产力, 气候变化, ANUSPLIN插值, 祁连山

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