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Mangrove wetlands distribution status identification, changing trend analyzation and carbon storage assessment of china

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china Geology 2024年第1期7卷 1-11页

作者： Chang Li Fu Wang Peng Yang Fei-cui Wang Yun-zhuang Hu Yan-lin Zhao Li-zhu Tian Rui-bin Zhao Tianjin Center(North china Center of Geoscience Innovation) China Geological Survey(CGS)Tianjin 300170China Tangshan Hydrological Survey and Research Center of Heibei Province Tangshan063000China Key Laboratory of Coast Geo-Environment China Geological SurveyCGSTianjin 300170China Tianjin Key Laboratory of Coast Geological Processes and Environmental Safety Tianjin 300170China

This research investigates the ecological importance,changes,and status of mangrove wetlands along china’s coastline.Visual interpretation,geological surveys,and ISO clustering unsupervised classification methods are employed to interpret mangrove distribution from remote sensing images from 2021,utilizing ArcGIS software platform.Furthermore,the carbon storage capacity of mangrove wetlands is quantified using the carbon storage module of InVEST model.Results show that the mangrove wetlands in china covered an area of 278.85 km2 in 2021,predominantly distributed in Hainan,Guangxi,Guangdong,Fujian,Zhejiang,Taiwan,Hong Kong,and Macao.The total carbon storage is assessed at 2.11×10^(6) t,with specific regional data provided.Trends since the 1950s reveal periods of increase,decrease,sharp decrease,and slight-steady increases in mangrove areas in china.An important finding is the predominant replacement of natural coastlines adjacent to mangrove wetlands by artificial ones,highlighting the need for creating suitable spaces for mangrove restoration.This study is poised to guide future mangroverelated investigations and conservation strategies.

关键词： Mangrove Wetland Carbon storage Ecological conservation ArcGIS software platform Restoration InVEST model Quantitative analysis coastal zone of china

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过去20年中国海水养殖空间分布变化

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Journal of Geographical Sciences 2023年第12期33卷 2377-2399页

作者：刘岳明王志华杨晓梅王绍强刘晓亮刘彬张俊瑶孟丹丁凯孟郜酷曾晓伟丁亚新 State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchCASBeijing100101China University of Chinese Academy of Sciences Beijing100049China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchCASBeijing100101China Jinling Institute of Technology Nanjing211169China School of Geography and Information Engineering China University of GeosciencesWuhan430074China School of Surveying and Land Information Engineering Henan Polytechnic UniversityJiaozuoHenan454000China

china’s mariculture provides more than 60%of the world’s mariculture products and plays an important role in the world’s aquaculture and food supply.Research on changes in the spatial distribution pattern of china’s mariculture,however,remains lacking.To accurately reflect the changes in the spatial pattern of mariculture in china,in this study,we used multitemporal optical and synthetic aperture radar remote sensing images to enhance the characteristics of mariculture and extracted the spatial distribution data for mariculture in china in 2000,2010,and 2020.Accordingly,we explored the distribution pattern and changes in mariculture in china.We found that,in 2020,china’s mariculture exhibited a distribution pattern of more in the north and less in the south.With the Yangtze River estuary as the boundary,the proportion of mariculture in northern china was 70.9%,and that in southern china was only 29.1%.This difference did not exist in 2000,but it emerged because of the rapid development of mariculture in northern china from 2010 to 2020.In addition,by superimposing the mariculture data with shoreline and water depth data,we found that more than 90%of china’s mariculture area was located in the sea area within 20 km of the shoreline and that more than 80%of the mariculture area was located in the sea area with water depths of less than 20 m.In addition,the spatial distribution of mariculture in china developed from near the shore and moved outward from shallow to deep water areas.We examined the driving factors that influence changes in the spatial distribution of mariculture in china.We argue that technological advancements in mariculture,as well as the intensive concentration of mariculture near the shore,policy constraints and incentives,and economic development,collaborate to shape the current pattern of mariculture development in china.

关键词： remote sensing mariculture coastal zone of china spatiotemporal variation

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