Impact of drought on the GEP of Poyang Lake basin vegetation ecosystem
LIU Jiaqian1， LU Jianzhong1， TIAN Qing1， CHEN Xiaoling1,2
(1.State Key Laboratory of Information Engineering in Surveying，Mapping and Remote Sensing， Wuhan University， Wuhan 430079， China；2.Key Laboratory of Poyang Lake Wetland and Watershed Research， Ministry of Education， Jiangxi Normal University， Nanchang 330022， China)
Abstract：Gross ecosystem productivity (GEP) is a fixed total amount of carbon in vegetation ecosystem， which， as an important part of carbon cycle research， has inestimable ecological value and extremely important human and social significance. In the context of global warming， drought has caused a certain impact on terrestrial ecosystem GEP. In this paper， with the Poyang Lake basin as the study area and using ecological coupling model monthly GEP during 2000－2016 is estimatedd， and the influence of drought on GEP in time and spatial distribution is explored by drought index SPI (Standard Precipitation Index). The GEP simulated by the model is analyzed in comparison with the GEP products of MODIS， and the above two have a good correlation and perform almost identically in the low GEP area. The research results show that there is an inhibitory effect of drought on GEP of Poyang Lake basin ecosystem， and GEP decreases significantly with the intensification of drought. They not only have a consistent and synergistic change trend in time， but also show a strong consistency in spatial distribution. These results are able to help related departments understand the influencing mechanism drought on GEP and provide scientific support for ecological protection in the basin.
刘家倩,陆建忠,田 晴,陈晓玲,. 干旱对鄱阳湖流域植被生态系统GEP的影响[J]. 华中师范大学学报(自然科学版), 2022, 56(3): 513-522.
LIU Jiaqian,LU Jianzhong,TIAN Qing,CHEN Xiaoling,. Impact of drought on the GEP of Poyang Lake basin vegetation ecosystem. journal1, 2022, 56(3): 513-522.
2022, Vol. 56 
