Spatio-temporal variation characteristics of vegetation GPP and underlying drivers over the Yangtze River Basin from 2000 to 2015
CHEN Liang1,2， WANG Xuelei11， YANG Chao1， LYU Xiaorong1
(1.Key Laboratory for Environment and Disaster Monitoring and Evaluation， Innovation Academy for Precision Measurement Science and Technology， Chinese Academy of Sciences， Wuhan 430077，China；2.University of Chinese Academy of Sciences， Beijing 100049，China)
Abstract：The ecosystem environment of the Yangtze River Basin is fragile and sensitive， and the vegetation change in this region is affected by many factors such as climate change and human activities.Based on MODIS GPP data，the spatiotemporal variation trend of vegetation GPP over the Yangtze River Basin from 2000 to 2015 was studied by using univariate linear regression trend analysis method， and its driving factors were discussed combined with meteorological data and land use type data.The results are shownas follows.1) The GPP over the Yangtze River Basin presents a spatial distribution pattern of low in the west and high in the east.The annual variation ranges from 919.90 to 1 051.48 g C·m-2·a－1， and the perennial average was 985.11 g C·m－2·a－1.2) The areas with increased GPP accounted for 4.69% of the total watershed area， which were mainly distributed inregions such as South Gansu Province， South Shaanxi Province， Southwest Henan Province， Northwest Hubei Province and the border of Yunnan Province and Guizhou Province.The areas of GPP reduction accounted for 1.28% of the total basin area， mainly distributed in Southern Jiangsu and Shanghai around the Yangtze River Estuary. The degradation of GPP was significant in large cities along the Yangtze River， such as Chongqing， Wuhan and surrounding areas.The GPP over Hanjiang River， Jinshajiang River below Shigu and Jialing River increased significantly， while that of Taihu Lake system and the main stream area below the Hukou decreased significantly.3) The conversion of cultivated land to construction land was the main land use transfer mode of GPP loose， while grassland conversion to forest land was the main land use transfer mode of GPP increased.This work wouldprovide references for ecological environment construction and sustainable development of the Yangtze River Basin.
陈 亮,王学雷,杨 超,吕晓蓉. 2000年—2015年长江流域植被GPP时空变化特征及其驱动因子[J]. 华中师范大学学报(自然科学版), 2021, 55(4): 630-638.
CHEN Liang,WANG Xuelei,YANG Chao,LYU Xiaorong. Spatio-temporal variation characteristics of vegetation GPP and underlying drivers over the Yangtze River Basin from 2000 to 2015. journal1, 2021, 55(4): 630-638.
2021, Vol. 55 
