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.
呼伦贝尔林草交错带植被固碳释氧功能变化及其驱动力研究
- Title:
- Study on the Change of Function of Vegetation Carbon Fixation and Oxygen Release and Its Driving Force in Hulunbuir Forest-Steppe Ecotone
- 文章编号:
- 1005-3409(2022)05-0164-07
- Keywords:
- NPP; function of carbon fixation and oxygen release; Hulunbuir forest-steppe ecotone; geographical weighted regression model
- 分类号:
- Q948
- 文献标志码:
- A
- 摘要:
- 为了探究呼伦贝尔林草交错带固碳释氧功能的变化特征及其对气候和土地利用变化的响应,基于NDVI、气象和土地利用数据,采用CASA模型估算了交错带植被净初级生产力(Net Primary Productivity,NPP),通过Pearson相关分析和地理加权回归分析探究了固碳释氧功能变化的主要驱动因素。结果表明:2000—2018年固碳释氧总量增加21.38%,其中新巴尔虎左旗(43.40%)和鄂温克族自治旗(27.41%)增加最显著。基于2000年、2010年、2018年土地利用数据进行统计,林地、草地、耕地、湿地和沙地的固碳释氧总量和单位面积平均值均增加,尤其是沙地(总量37.36%,均值36.53%)最为显著,其次为草地(总量27.86%,均值26.51%)。研究表明,沙化土地封禁等保护措施对沙化地区固碳释氧功能的提升有着重要的推动作用。而气候变化是整个研究区固碳释氧服务功能提升的主要驱动力,且林区和草原区主要驱动因子分别是气温和降水。
- 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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备注/Memo
收稿日期:2021-08-19 修回日期:2021-10-19
资助项目:生态环境部财政拨款项目“生物多样性调查、观测和评估项目”(2019—2023年)
第一作者:乔亚军(1991—),女,河南确山人,博士,助理研究员,研究方向为生态服务功能评估。E-mail:643890513@qq.com
通信作者:张慧(1968—),女,河南开封人,博士,研究员,主要从事生态安全与生态服务功能方面的研究。E-mail:zhanghui@nies.org