TROPICAL GEOGRAPHY ›› 2018, Vol. 38 ›› Issue (6): 874-883.

### Construction of Ecological Security Pattern of Tong’an District, Xiamen City

HUANG Cangping1,2,3, YIN Xiaoling2, HUANG Guangqing2, YUAN Shaoxiong2, WANG Jun2, LAI Yong1,2,3

1. (1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; 2. Guangzhou Institute of Geography, Guangzhou 510070, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China ）
• Online:2018-11-30 Published:2018-11-30

Abstract: Taking Tong’an District of Xiamen City as an example, the study assessed the ecological environment quality by remote sensing ecological index (RSEI) based on RS technology. Based on GIS, we constructed the ecological security pattern in Tong’an District of Xiamen City. The ecological source was identified according to stability of the ecological environment quality by analyzing the multi-period ecological environment quality evaluation results. The ecological resistance base surface was constructed by integrating land cover, vegetation coverage, topography, and river system, also DMSP/OLS nighttime light data were used to correct the impact of human activities on the ecological resistance value. Based on the minimum cumulative resistance model, the ecological resistance surface was constructed and the ecological buffer zone, corridors and nodes were identified. The results showed that: 1) the RSEI of Tong’an District was 0.577 3, 0.664 8 and 0.632 9 in 2006, 2010 and 2015 respectively. The ecological quality was in good condition in these three years, wheresa RSEI increased from 2006 to 2010, then decreased from 2010 to 2015. 2) We constructed the urban ecological security pattern, including corridors between ecological sources, ecological nodes, river corridors and road protection corridors. 44 corridors between ecological sources and 20 ecological nodes were identified by analyzing the ecological resistance surface based on the GIS hydrological analysis module. The ecological source region, with excellent and stable ecological environment quality identified by the evaluations of 2006, 2010 and 2015, was about 293.19 km2, accounting for 44.12% of the whole area. The areas of high, moderate and low levels ecological security, divided according to the frequency statistics of the resistance value of the ecological resistance surface, were about 478.81, 99.53 and 83.36 km2 and accounting for 72.36%, 15.04% and 12.60% respectively. DMSP/OLS nighttime light data were used to revise the interference of human activities on ecological process. 3) Putting forward a framework for ecological protection, which based on the ecological security pattern, was composed of ecological safety barrier, corridor and matrix, provided reference for urban construction plan and rational development of urban development. The ecological source region with high ecosystem service value and high ecological sensitivity, was identified by RSEI. The ecological source region and the important ecological functional region had same distribution. The ecological source region identified based on RSEI, provided a reference for ecological source identification.