森林资源二类调查数据在生态系统服务评估模型InVEST中的应用

摘要

In this study,the magnitude and spatial pattern of main types of ecosystem services in Mento-ugou District,Beijing were evaluated based on InVEST model using forest inventory data and classified re-mote sensing data,respectively.The results showed that forest inventory data can be used to evaluate re-gional ecosystem services combining with the InVEST model.And the results based on the two sources of data were similar.The average carbon storage in Mentougou District was 1525.05 ×104 tons.The water yield was 2.93 ×108 stere.The N and P retention were 1 12.94 tons and 0.39 tons respectively.The N and P exports were 28.89 tons and 0.09 tons,respectively.The soil conservation was 1.65 ×108 tons,and the soil erosion was 5 1.39 ×104 tons.There were obvious spatial patterns in the distribution of ecosystem services.Areas with a high level of vegetation cover also had a high level of carbon storage and soil con-servation.The distribution of N and P retention was related to percentages of crop and bare lands.The dis-tribution of water yield was influenced by percentage of land use/land cover and spatial patterns of precip-itation.%以北京市门头沟区为例，分别基于森林资源二类调查数据和遥感解译的土地覆被数据，利用InVEST模型，对研究区内主要生态系统服务的大小和空间分布进行量化和描述。结果表明：森林资源二类调查数据可以与In-VEST模型结合用于区域生态系统服务的计量，且与基于遥感数据的评估结果相近；门头沟区总碳储量平均为1525.05万t，产水量为2.93亿m3／a，N和P保持量分别为112.94 t／a和0.39 t／a，N和P输出量分别为28.89 t／a和0.09 t／a，土壤保持量为1.65亿t／a，土壤侵蚀量为51.39万t／a；从空间分布看，植被覆盖好的区域具有较高的碳储量和土壤保持量，N和P保持量与集水区内农地、裸地比例密切相关，产水量则受土地利用／覆被组成和降水分布格局的影响。