Acta Geographica Sinica ›› 2018, Vol. 73 ›› Issue (3): 429-441.doi: 10.11821/dlxb201803004

• Surface Process and Ecological Environment • Previous Articles     Next Articles

Evaluation on ecosystem changes and protection of the national key ecological function zones in mountainous areas of central Hainan Island

HOU Peng1,ZHAI Jun1(),CAO Wei2,YANG Min1,CAI Mingyong1,LI Jing1   

  1. 1. Satellite Environment Center, MEP, Beijing 100094, China
    2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
  • Received:2017-05-22 Online:2018-03-20 Published:2018-03-23
  • Supported by:
    [Foundation: National Key R&D Program of China, No.2017YFC0506506, No.2016YFC0500206; National Natural Science Foundation of China, No.41501484]

Abstract:

Ecosystem services have become one of the major aspects of ecosystem management and evaluation. As a key area of ecosystem services, evaluation of ecosystem changes and implementation effect is important for national key ecological function zones. Such evaluation can help to maintain national ecological security, drive the implementation of the main function zone strategy and advance the construction of an ecological civilization. This article explores the ecological zone of a tropical rainforest region in the central mountain area of Hainan Island, China. Multi-source satellite data and ground observation statistics are analyzed with geo-statistics method and ecological assessment model. The core analysis of this paper includes ecosystem pattern, quality and service. By means of spatial and temporal scale expansion and multi-dimensional space-time correlation analysis, we examine the trend and stability characteristics of ecosystem change, and evaluate the implementation effect. The results showed that, first, the forest area ratio was 84.5% in 2013, which was significantly higher than the average level in Hainan Island. During 1990-2013, settlement gradually increased in ecological zone. After the implementation of the function zone in 2010, human activity intensity was still increasing, with the area ratio rising from 0.5% to 0.8%. The main land use change was urban construction and land reclamation. Second, water conservation in the ecological function zone was better than that outside the zone. During 1990-2013, water conservation increased slightly, and had obvious fluctuation in different periods. Water conservation change decreased first and then increased during both the periods 1990-2000 and 2000-2013. Water conservation quantity was 0.5178 million cubic metres per square kilometer, which was higher than the average outside the zone. Third, soil conservation in the ecological function zone was also better than that outside the zone. Soil conservation showed dramatic fluctuations and relatively poor stability during 1990-2013. Soil conservation quantity was 19500 tons per square kilometer in the ecological function zone. Fourth, the human disturbance index in the ecological function zone was significantly less than that outside the zone and had lower biodiversity threat level. This would be beneficial to biodiversity conservation. In the ecological function zone, average human disturbance index was 0.3664 and 0.1152 lower than that outside the zone. During 1990-2013, human disturbance index variation range outside the zone was 0.0152, about 5.31 times that of the inner zone. Especially in 2010-2013, the increased range of human disturbance index in the ecological function zone was significantly less than that outside value the zone.

Key words: ecological function zone, ecosystem, ecosystem service, protection effect