田义超^1,2,3, 黄远林¹, 张强¹, 陶进¹, 张亚丽¹, 黄鹄², 梁铭忠², 周国清³
1.北部湾大学资源与环境学院, 广西 钦州 535011;2.北部湾大学海洋地理信息资源开发利用重点实验室, 广西 钦州 535011;3.桂林理工大学 广西空间信息与测绘重点实验室, 广西 桂林 541004

摘要:
基于北部湾海域典型海岛高分1号数据，借助于CART决策树方法，获取了广西北部湾两个典型海岛的景观格局数据，并采用生态系统服务价值计量模型、空间自相关模型及地统计学中的变异函数模型对其生态系统服务价值进行了空间异质性分析。结果表明：团和岛单位面积生态系统服务价值是七星岛的1.08倍，但其变异系数低于七星岛；七星岛由于其地质背景为泥沙岛，景观格局受到人类活动以及自然环境的强烈干扰，趋向于复杂化和破碎化；而团和岛由于所处的外部环境以及自身的地质特征，景观格局呈现出整体斑块化分布状态；团和岛的景观格局主要受到结构性因素的控制，而七星岛则以随机性因素控制为主，选用变程和Moran’s指数来表征其复杂化和破碎化，来决定其优先开发时序，可对前者进行适当开发，而对后者适当进行生态保护；对受到结构性因素影响的岛屿在进行开发时，时序的识别选用变程和Moran’s指数来表征，若变程和Moran’s指数越小，说明海岛整体的景观分布格局趋向于复杂化和破碎化，反之生态系统较好，可进行优先开发。同时本文构建了北部湾海岛生态系统异质性评估与自然资源管理框架，并提出了海岛管理的建议与对策。
关键词:景观格局生态系统服务空间异质性对比研究广西北部湾典型海岛
DOI：10.11759/hykx20180610001
分类号:X196
基金项目:广西自然科学基金联合资助培育项目（2018JJA150135，41401644）；广西创新驱动发展专项（AA18118038）；广西教育厅基金资助项目（ZD2014138）；广西北部湾海洋生物多样性养护重点实验项目（2015ZB07）；广西海洋生态院士工作站能力建设项目（AD17129046）

A comparative study of spatial heterogeneity of ecosystem service value in typical islands in Beibu Gulf
TIAN Yi-chao^1,2,3, HUANG Yuan-lin¹, ZHANG Qiang¹, TAO Jin¹, ZHANG Ya-li¹, HUANG Hu², LIANG Ming-zhong², ZHOU Guo-qing³
1.College of Resources and Environment, Beibu Gulf University, Qinzhou 535011, China;2.Key Laboratory of Marine geographic information resources development and utilization in the Beibu Gulf, Beibu Gulf University, Qinzhou 535011, China;3.Guangxi Key Laboratory for Geospatial Informatics and Geomatics Engineering, Guilin University of Technology, Guilin 541004, China
Abstract:
Based on remote sensing data of two typical islands in Beibu Gulf, the landscape pattern data of islands were obtained using the CART decision tree method. Accordingly, the ecological system service value measurement model, the spatial autocorrelation model, and the variation function model were used for determining the spatial heterogeneity of the ecosystem service value. The per unit ecosystem service value in Thuanhe island was approximately 1.08 times higher than that in Seven Star island; however, the coefficient of variation in Thuanhe island was lower than that in Seven Star island. Because of its geological background of mud and sand Island, the landscape pattern of Seven Star island was strongly disturbed by human activities and natural environment, and its pattern tended to be complicated and fragmented, whereas the landscape pattern of Thuanhe island exhibited an entire patch due to its external environment and its own geological characteristics. The landscape pattern of Thuanhe island was primarily regulated by structural factors, whereas the Seven Star island was dominated by random factors. Therefore, Thuanhe island, which is regulated by structural factors, should be properly developed, and the Seven Star island, which is strongly influenced by nonstructural factors, should be appropriately protected. In the development of islands affected by structural factors, the identification of time series is characterized by range and Moran's index. A smaller range and Moran's index indicate more complexity and fragmentation. Otherwise, if the ecosystem were better, priority could be given to development. Finally, this paper constructs a framework for evaluating the island ecosystem heterogeneity and management of natural resources and suggests some countermeasures for island management.
Key words:landscape patternecological service valuespatial heterogeneitycomparative studythe typical islands in Beibu Gulf





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