引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 103次   下载 82 本文二维码信息
码上扫一扫!
分享到: 微信 更多
贵州省黎平县地表覆被变化引起的生态系统碳储量变化
李义平1, 蔡宏1, 田鹏举2, 张蓓蓓1, 廖书冰1
1.贵州大学 矿业学院, 贵州 贵阳 550025;2.贵州省生态气象和遥感中心, 贵州 贵阳 550002
摘要:
[目的] 对贵州省黎平县地表覆被变化引起的生态系统碳储量变化进行评估,为区域碳源和碳汇管理及"大生态"发展目标提供科学依据。[方法] 基于黎平县2005,2010和2015年3期土地利用数据,结合CA-Markov模型和InVEST模型碳储量模块,在对土地利用变化趋势进行分析的基础上定量评估了研究区2005-2025年生态系统固碳能力。[结果] ①2005-2015年,黎平县耕地、林地、未利用地呈减少趋势,草地、建设用地、水域呈增加趋势。②2015-2025年土地利用整体变化趋势与2005-2015年一致但幅度增大。耕地由2005-2015年的降幅2.37%到2015-2025年的增幅4.21%,整体趋势发生转变;③2015年黎平县生态系统总碳储量和平均碳密度分别为9.12×107 t和206.61 t/hm2。自2005年以来分别下降2.00×105 t和0.45 t/hm2。2025年黎平县碳储量和平均碳密度分别为8.98×107 t和203.44 t/hm2。[结论] 黎平县生态系统固碳能力呈减弱趋势,林地的大面积转出和建设用地的扩张是碳储量下降的直接原因,未来应加强对土地利用结构的优化。
关键词:  碳储量  碳密度确定  地表覆被  CA-Markov模型  InVEST模型
DOI:10.13961/j.cnki.stbctb.2020.02.013
分类号:F301.2
基金项目:贵州省生态学一流学科建设项目"利用遥感技术对贵州省植被时空变化及其与气候变化响应研究"(GNYL[2017]007);贵州省科技计划项目"基于遥感和GIS的喀斯特流域坡地景观演化水质响应机制研究"(黔科合基础[2016]1028)
Changes in Ecosystem Carbon Stock Caused by Land Cover Conversion in Liping County of Guizhoui Province
Li Yiping1, Cai Hong1, Tian Pengju2, Zhang Beibei1, Liao Shubing1
1.Mining College of Guizhou University, Guiyang, Guizhou 550025, China;2.Guizhou Ecological Meteorology and Satallite Remote Sensing Center, Guiyang, Guizhou 550002, China
Abstract:
[Objective] The change of ecosystem carbon stock caused by the change of surface cover in Liping County, Guizhou Province was evaluated, in order to provide scientific basis for the management of regional carbon source and sink, and the development goal of "large ecology".[Methods] Based on the land use data of 2005, 2010 and 2015, the carbon sequestration capacity of the ecosystem of Liping County from 2005 to 2025 was quantitatively evaluated by combined the CA-Markov model with the InVEST carbon storage module.[Results] ① From 2005 to 2015, the cultivated land, forest land and unused land in Liping County decreased, while the grassland, construction land and water area increased generally. ② And the overall variation of land use change in 2015-2025 was consistent with that in 2005-2015. The cultivated land decreased from 2.37% in 2005-2015 to 4.21% in 2015-2025. ③ The total carbon stock and average carbon density of Liping County ecosystem were 9.12×107 t and 206.61 t/hm2, respectively in 2015, which has decreased by 2.00×105 t and 0.45 t/hm2 since 2005. In 2025, the carbon storage and average carbon density of Liping County was predicted to be 8.98×107 t and 203.44 t/hm2, respectively.[Conclusion] The carbon sequestration capacity of the ecological system in Liping County is weakening. The transfer of forest in large scale and the expansion of construction land are the direct reasons for the decline of carbon storage. In the future, the optimization of land use structure should be strengthened.
Key words:  carbon storage  determination of carbon density  ground cover  CA-Markov model  InVEST model