北京湾过渡带生态系统服务地形梯度效应评价
陈 龙, 刘春兰, 裴 厦, 刘晓娜, 宁杨翠

(北京市环境保护科学研究院 国家城市环境污染控制工程技术研究中心, 北京 100037)

梯度效应; 海拔; 坡度; 局部加权回归; 突变点

Evaluation of the Effect Terrain Gradient of Ecosystem Services in the Transitional Zone of Beijing Bay
CHEN Long, LIU Chunlan, PEI Sha, LIU Xiaona, NING Yangcui

(National Urban Environmental Pollution Control Engineering Research Center, Beijing Municipal Research Institute of Environment Protection, Beijing 100037, China)

gradient effect; altitude; slope; locally weighted regression; change point

备注

为了掌握过渡带区域生态系统服务的变化规律,促进当地可持续发展,以北京湾过渡带为研究区,以公里网格为研究单元,结合局部加权回归和突变点识别,识别各服务随海拔和坡度因子变化的突变点,揭示了该区域生态系统服务的地形梯度效应。结果 表明:(1)除休闲游憩服务外,其他服务均随地形因子的变化表现出一定的梯度效应。各服务随海拔因子和坡度因子的梯度效应表现基本一致。(2)海拔梯度方面,休闲游憩和土壤质量调节无关键突变点,其他服务的关键突变点位于海拔300 m左右,趋势变化可以归为5类。(3)坡度梯度方面,水质净化、土壤保持、休闲游憩和土壤质量调节无关键突变点,10°和15°是部分服务趋势发生逆转的临界点,趋势变化可以分为6类。研究建议在关键突变点附近区域可通过调整土地利用结构、提升生态系统质量等手段,促进生态系统服务效益最大化。

In order to understand the variation of ecosystem services in the transition zone and promote local sustainable development, the topographic gradient effects of major ecosystem services in the Beijing Bay were revealed at 1 km×1 km pixel level by using the methods of locally weighted regression and change point identification, followed by the identification of change points of ecosystem services in varying altitudes and slopes. The results show that:(1)except the recreational service, other ecosystem services typically show terrain gradient effects to some extent, displaying consistent changes along the increase of altitude and slope;(2)in terms of altitude gradient, no key change point was detected in the services of recreation and soil quality regulation; however, a key change point for other ecosystem services was seen at an altitude of about 300 m; the trend changes can be classified into five categories;(3)in terms of slope gradient, no key change point was observed in the services of water purification, soil conservation, recreation and soil quality regulation; however, the critical change points for the reversal of some services were seen at the slopes with 10° and 15°, respectively; the trend changes can be divided into six categories. Based on the above findings, land use structure in the adjacent area of key change points is recommended to make some adjustment to improve the ecosystem quality and maximize the benefits of ecosystem services.