Abstract
Vegetation net primary productivity (NPP) is critical for maintaining and enhancing the carbon sink capacity of vegetation in the context of continuing global climate change and human activity. As a typical city in the southern subtropical region of China, Shaoguan’ forest As an ecological barrier of in the Guangdong Hong Kong Macao Greater Bay Area plays an important role in protecting water sources, purifying air and maintaining ecological balance. However, studies that quantitatively analyze the spatial and temporal dynamics of climate change and human activity on subtropical vegetation NPP in Shaoguan are still incomplete. In this study, the NPP of vegetation in Shaoguan at 30m resolution was estimated from 2001 to 2020 based on the GF-SG algorithm and CASA model. Then the effects of climate change and human activity on vegetation NPP were quantitatively assessed by the RESTREND method. The results showed that the vegetation NPP in Shaoguan increased rapidly (4.09 g C∙m^(-2)∙yr^(-1), P<0.001) over the past 20 years, with 70.21% of the area showing an increasing trend. The contributions of climate change and human activity to vegetation NPP were 0.948 g C∙m^(-2)∙yr^(-1) and 3.137 g C∙m^(-2)∙yr^(-1), respectively. Human activity is a dominant factor underlying the vegetation restoration; while the combined effects of climate change and human activity is the primary reason for vegetation degradation. The results emphasize the importance of human activities for the restoration of vegetated ecosystems, ecological construction in Shaoguan.
Presenters
Shuisen ChenProfessor, Remote Sensing & GIS, Guangzhou Institute of Geography, Guangdong Academy of Sciences, Guangdong, China
Details
Presentation Type
Paper Presentation in a Themed Session
Theme
Human Impacts and Responsibility
KEYWORDS
QUANTITATIVE ASSESSMENT, IMPACTS, CLIMATE CHANGE, HUMAN ACTIVITY, NPP, SUBTROPICAL VEGETATION
