基于SPOT数据的深圳市生态系统服务功能重要性评价

Assessment on the Importance of Ecosystem Service Function in Shenzhen City Based on SPOT Data

为揭示深圳市生态系统服务功能的空间分布特征，基于SPOT高精度遥感数据和空间分析技术，利用CASA光能利用率模型反演估算深圳市2015年净初级生产力（NPP），选取水源涵养、水土保持、生物多样性保护三种该地区典型的生态系统服务功能进行重要性评价，综合分析深圳市生态系统服务功能重要性的分布特征和地域差异。结果表明：极重要区域面积为290km2，面积占比为15％，基本全部分布在海拔100m以上且坡度大于25。的区域，集中位于东南部的七娘山一排牙山一田头山一三洲田一梧桐山山脊及附近；重要区域面积为313km2，面积占比为16％，主要围绕或者夹杂在极重要区域周围：中等重要区域面积为195km2，面积占比为10％，主要位于铁岗一石岩水库、清林泾水库等饮用水源保护区；一般重要区域面积为1178km2，面积占比为59％，连片分布在全市中西部和北部的大部分区域。研究客观评价了深圳市生态系统服务功能在空间上的重要性特征，有助干深圳市生态系统管理、重要生态区划定和生态保护管理决策的制定。

To reveal the spatial distribution characteristics of ecosystem service function of Shenzhen, based on SPOT high resolution remote sensing data and spatial analysis technology, using CASA light energy utilization model, this research estimate net primary productivity （NPP） in 2015 of Shenzhen, the work selected three kinds of typical ecosystem services in the region： water conservation, soil and water conservation, and biodiversity protection to assess importance and analysis distribution characteristic and regional difference of the importance of ecosystem services. Results showed that the area of extremely important region of ecosystem service function was 290 km2, area accounted for 15%, distributing in the region of altitude above 100 m and slope more than 25~ located in the ridges and nearby of the southeast Qiniang mountain-Paiya mountain-Tiantoushan mountain-Sanzhoutian mountain-Wutong mountain; The area of important region of ecosystem service function was 313 km2, area accounted for 16%, mainly around or mixed inextremely important region; The area of medium important region of ecosystem service function was 195 km2, area accounted for 10%, mainly distributing in Tiegang-Shiyan reservoir and Qinglinjing reservoir and so on; The area of general important region of ecosystem service function was 1 178km2, area accounted for 59%, mainly distributing in most area of midwest and north. The work objectively assessed the importance characteristics of ecosystem service function in Shenzhen, helping to ecosystem management, delimit the important ecological regions and make the policy of ecological protection and management.