摘要
红树林湿地在维护近岸海域的生态环境,抵御海潮、台风自然灾害等方面具有重要作用。利用海南岛红树林遥感专题信息产品,基于分形理论中的豪斯道夫维数、景观稳定性指数和聚集维数,分析了1987—2017年海南岛东寨港自然保护区红树林景观空间结构的变化特征:(1)1987—2017年间,红树林景观面积整体增加,2017年总面积达到18.05 km^(2),且扩展方式主要为边缘扩展和内部联通。(2)红树林景观分布复杂度和稳定性在1987—2003年间整体下降,波动性较强,景观结构不稳定;在2003—2013年间稳步上升,斑块持续扩展,景观结构稳定发展;2013年后略有下降。(3)红树林景观增长有聚集中心,聚集维数为1.47,对周围红树林的增长有辐射性。东寨港红树林聚集分布区已达景观稳定状态,在保持抚育的基础上可适度开发其审美、生态功能,针对尚处于扩张等状态的红树林斑块,可持续进行扩种、抚育。
Mangrove wetlands play an important role in protecting coastal ecological environment and resisting natural disasters such as tides and typhoons.Based on Hausdorff dimension,stability index and aggregation dimension of Fractal theory,the change characteristics of mangrove landscape’s spatial structure in Dongzhaigang National Nature Reserve of Hainan from 1987 to 2017 were analyzed by using mangrove remote sensing thematic information products.(1)During 1987—2017,the total area of mangroves in Dongzhai Harbor showed an overall increasing trend.In 2017,the area of the mangroves reached 18.05 km^(2).The main expansion modes of mangrove landscape were marginal expansion and internal connection.(2)During 1987—2003,the complexity and stability of mangrove landscape distribution showed a downward trend with strong dynamic,and the landscape structure was in an unstable state.During 2003—2013,the complexity and stability of landscape of mangroves gradually increased steadily,mangrove patches expanded and the landscape structure reached a steady state.After 2013,the complexity and stability of landscape of mangroves decreased slightly.(3)Expansion of mangroves in Dongzhai Harbor is aggregate-centered and the aggregation dimension is 1.47.The aggregation centers have radiation effects to the growth of surrounding mangroves.The aggregated distribution area of mangroves in Dongzhai Harbor has reached a stable state of landscape development.Under the circumstances of maintaining and fostering properly,its aesthetic and ecological function can be developed moderately.While for those mangrove patches that are still expanding,sustainable development can be achieved through artificial afforesting and fostering.
作者
张颖
朱忠礼
焦晨泰
Zhang Ying;Zhu Zhongli;Jiao Chentai(Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China)
出处
《遥感技术与应用》
CSCD
北大核心
2022年第5期1179-1189,共11页
Remote Sensing Technology and Application
关键词
红树林
海南岛
分形
分维数
聚集维数
空间结构
Mangrove
Hainan island
Fractal
Fractal dimension
Aggregation dimension
Spatial structure
作者简介
张颖(2001—),女,河南濮阳人,硕士研究生,主要从事自然灾害学研究。E-mail:201811051125@mail.bnu.edu.cn;通讯作者:朱忠礼(1972—),男,河南商丘人,副教授,主要从事遥感与地理信息系统研究。E-mail:zhuzl@bnu.edu.cn
