基于InVEST模型的河北省陆地生态系统碳储量研究

doi:10.19741/j.issn.1673-4831.2019.0918

摘要/Abstract

摘要： 研究土地利用变化对生态系统碳储量的影响可为区域碳库管理提供科学依据。以1990-2015年河北省土地利用数据为基础，分析土地流转方向，利用InVEST模型对建设用地侵占生态用地导致的陆地生态系统碳储量减少进行定量评估。结果表明，河北省碳密度较高的植被类型为沼泽湿地和落叶阔叶林，碳储量高值区主要集中在河北省西北部海拔相对较高的山地林区，碳储量低值区主要集中在南部平原区；1990-2015年河北省陆地生态系统碳储量累计减少44.48 Tg，建设用地扩张导致的碳储量减少29.23 Tg，引起碳储量减少的土地利用变化中，建设用地扩张占比最高；石家庄市建设用地扩张规模最大，碳储量减少8.83 Tg，承德市碳储量减少最少，碳储量减少0.44 Tg。河北省陆地生态系统碳储量呈下降趋势，建设用地扩张是导致碳储量下降的主要原因，其对不同区域碳储量的影响程度不同，扩张规模直接影响碳储量变化速率。

关键词: 碳储量, 建设用地扩张, InVEST模型, 河北省

Abstract: Understanding the spatial distribution and dynamics of carbon storage provides scientific support for the quantification and management of ecosystem carbon pools. Based on the land use data of Hebei Province from 1990 to 2015, the amount of carbon storage in this region was estimated using InVEST model. The impacts of trends in land use change and the expansion of construction land on changes in carbon storage were evaluated and analyzed. The results show that between 1990 and 2015 marsh wetlands and deciduous broad-leaved forests had the largest carbon density in Hebei Province. The total carbon storage was relatively high in the mountainous forest areas in the northwest of Hebei Province, while that in the southern plain area was relatively low. The total carbon storage in Hebei Province showed a decline from 1990 to 2015, the carbon storage decreased by 44.48 Tg between 1990 and 2015. Among land-use changes that cause a reduction in carbon storage, construction land expansion accounts for the highest proportion. Shijiazhuang, the provincial capital, was the region with the largest expansion of construction land, and it also had a large reduction in carbon storage (8.83 Tg), while the Chengde region had the lowest reduction in carbon storage (0.44 Tg). This suggests that the extent and scale of construction land expansion will have the greatest effect on the decline of carbon reserves. In general, the carbon storage in Hebei Province shows a downward trend, and the scale of construction land expansion affects the decline rate of carbon storage. This study provides scientific information for optimizing land use design, reducing carbon emissions, and improving ecological benefits.

Key words: carbon storage, expansion of construction land, InVEST model, Hebei Province

中图分类号:

李瑾璞, 夏少霞, 于秀波, 李素晓, 许策, 赵宁, 王树涛. 基于InVEST模型的河北省陆地生态系统碳储量研究[J]. 生态与农村环境学报, 2020, 36(7): 854-861.

LI Jin-pu, XIA Shao-xia, YU Xiu-bo, LI Su-xiao, XU Ce, ZHAO Ning, WANG Shu-tao. Evaluation of Carbon Storage on Terrestrial Ecosystem in Hebei Province Based on InVEST Model[J]. Journal of Ecology and Rural Environment, 2020, 36(7): 854-861.

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