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[1]QIAO Yajun,ZHANG Hui,LIU Kun,et al.Study on the Change of Function of Vegetation Carbon Fixation and Oxygen Release and Its Driving Force in Hulunbuir Forest-Steppe Ecotone[J].Research of Soil and Water Conservation,2022,29(05):164-170.

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Study on the Change of Function of Vegetation Carbon Fixation and Oxygen Release and Its Driving Force in Hulunbuir Forest-Steppe Ecotone

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 05 Page number: 164-170 Column: Public date: 2022-08-20

Title:: Study on the Change of Function of Vegetation Carbon Fixation and Oxygen Release and Its Driving Force in Hulunbuir Forest-Steppe Ecotone

Author(s):: QIAO Yajun¹, ZHANG Hui^1,2, LIU Kun¹, WANG Zhi¹, XU Wanggu¹; (1.Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China; 2.Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, College of Geography and Remote, Nanjing University of Information Science & Technology, Nanjing 210044, China)

Keywords:: NPP; function of carbon fixation and oxygen release; Hulunbuir forest-steppe ecotone; geographical weighted regression model

CLC:: Q948

DOI:: -

Abstract:: In order to explore the characteristics of change in function of carbon fixation and oxygen release in the Hulunbuir forest-steppe ecotone and its response to climate and land use changes, based on NDVI, meteorological and land use data, we estimated the net primary productivity(NPP)using the CASA model, and investigated the trend of the function of carbon fixation and oxygen release and its driving factors using Pearson correlation analysis and geographical weighted regression model in the Hulunbuir forest-steppe ecotone. The results showed that the total amount of carbon fixation and oxygen release in the study area had increased by 21.38% in the past 19 years, particularly in Xinbaerhu(43.40%)and Ewenke(27.41%). Based on the land use data of 2000, 2010, and 2018, the total amounts of carbon fixation and oxygen release and the average values per unit area in woodland, grassland, cultivated land, wetland and sandy land increased, especially in sandy land(total 37.36%, average 36.53%)and grassland(total 27.86%, average 26.51%). These results indicated that protection measures such as the closure of desertified land played an essential role in promoting the function of carbon fixation and oxygen release in desertified regions, climate change was the main driving force for the improvement of service function of carbon fixation and oxygen release in the whole study area, and the main driving factor of the forest and the steppe was temperature and precipitation, respectively.

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Last Update: 2022-08-20