Mangrove Wetland Dynamics in Shankou, Guangxi based on LUCC and Landscape Pattern Change

Subjects: Geosciences >> Geology submitted time 2023-07-28

郑法 黄福林 陈泽恒 丁伟品

Abstract： [Objective] Based on the field survey data of Guangxi Shankou National Mangrove Ecological Nature Reserve (hereinafter referred to as Shankou Mangrove Reserve) in 2022, this study selects remote sensing images of six periods from 1987 to 2021 by combining with LUCC and Landscape Pattern Index, and utilizes the object-oriented image classification methodology, which focuses on exploring the process of change of the mangrove wetland in Shankou, Guangxi, and the important influencing factors. [Results] From the perspective of land use: during the past 35 years in the study area, there has been a continuous conversion between land classes, in which the area of cultivated land has been continuously reduced, the area of rice-grass beaches and aquaculture pits have increased in large proportion, the rice-grass beaches have mainly encroached on the former coastal beaches, and the aquaculture pits have mainly been converted from forested land and cultivated land; from the perspective of the landscape: the degree of landscape fragmentation has been continuously increased, the connectivity has been reduced gradually, the shape of the landscape has gradually become more complex, and the land class succession has become more frequent. frequent; Pearson correlation analysis showed that there was a highly significant or significant correlation between land use change and landscape indices of coastal mudflat, mizuna mudflat and aquaculture ponds. [Conclusion] Over the past 35 years, the Yamaguchi Mangrove Reserve has experienced significant land use changes, and invasive species (mikusa beaches) and anthropogenic disturbances (aquaculture pits and ponds) are the main factors affecting the changes of mangrove wetlands in the area, and are also the main causes of the continuous increase in landscape fragmentation; the study adopts a multivariate approach and a multi-dimensional analysis to expose the variability of regional influencing factors, and provides theoretical bases for environmental management and conservation efforts in typical mangrove ecosystems. management and protection of typical mangrove ecosystems by providing theoretical basis.

Peer Review Status:Awaiting Review

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