张新中,李育,张成琦,刘和斌

• 1:兰州大学资源环境学院
• 2:中国科学院西北生态环境资源研究院生态与农业研究室

摘要(Abstract)：

基于MODIS NPP数据、气象站资料和土壤微生物呼吸模型,采用经验正交函数、Pearson相关系数及空间插值等方法,研究了2000-2014年石羊河流域净生态系统生产力(NEP)的空间分布及变化趋势,分析其与NDVI、降水、气温和太阳辐射变化的关系.结果表明,石羊河流域年均单位NEP为-48.56 gC/(m~2·a),中上游表现为碳汇,下游荒漠区表现为碳源,生态系统碳汇总量呈增加趋势;灌丛生态系统碳汇潜力最高,其次是森林和耕地,草地生态系统自2012年已由碳源转为碳汇,荒漠生态系统碳汇能力一直呈波动下降趋势;流域内NEP变化主要受控于降水,与温度呈弱负相关,与太阳辐射相关性不显著,流域不同区域相关性差异明显.

关键词(KeyWords)： 净生态系统生产力;气候变化;碳汇;石羊河流域

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41822708);; 中国科学院战略性先导科技专项项目(XDA20100102);; 第2次青藏高原综合科学考察研究项目(XDA20060700)

作者(Author): 张新中,李育,张成琦,刘和斌

DOI: 10.13885/j.issn.0455-2059.2020.04.008

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