近30 a来盐城沿海盐沼时空分布演变规律及影响因素分析

doi:10.3969/j.issn.1001-909X.2018.03.006

海洋学研究 ›› 2018, Vol. 36 ›› Issue (3): 57-66.DOI: 10.3969/j.issn.1001-909X.2018.03.006

近30 a来盐城沿海盐沼时空分布演变规律及影响因素分析

郑禹君¹, 时连强^*1, 徐岱璐^1,2,3, 蒋祖荫¹, 郭俊丽^1,2,3

1.国家海洋局第二海洋研究所国家海岛开发与管理研究中心,浙江杭州 310012;
2.海岸与海岛开发教育部重点实验室,江苏南京 210023;
3.南京大学地理与海洋科学学院,江苏南京 210023

收稿日期:2018-02-02 修回日期:2018-05-04 出版日期:2018-09-15 发布日期:2022-11-26
通讯作者: ^*时连强(1977-),男,副研究员,主要从事河口海岸动力沉积与地貌及环境磁学研究。E-mail:190697059@qq.com
作者简介:郑禹君(1994-),女,江苏盐城市人,主要从事海岛海岸带开发与管理方面的研究。E-mail:739534016@qq.com

Analysis on the rules of spatial and temporal distribution of salt marsh in Yancheng coastal area over the past 30 years and its influencing factors

ZHENG Yu-jun¹, SHI Lian-qiang^*1, XU Dai-lu^1,2,3, JIANG Zu-yin¹, GUO Jun-li^1,2,3

1. State Research Centre for Island Exploitation and Management, Second Institute of Oceanography,SOA, Hangzhou 310012, China;
2. Key Laboratory of Coastal and Island Development, Ministry ofEducation, Nanjing 210023, China;
3. School of Geography and Ocean Sciences, Nanjing University,Nanjing 210023,China

Received:2018-02-02 Revised:2018-05-04 Online:2018-09-15 Published:2022-11-26

摘要/Abstract

摘要： 盐沼是全球温带及亚热带地区的主要滨海湿地类型之一,具有重要的生态服务功能。本文以盐城沿海区域为例,利用近30 a来的6期遥感卫星图像,通过简单的植被覆盖指数(NDVI)粗提取和目视解译的方法分析了该区域盐沼的时空演变,并对引起这些变化的影响因子进行了探讨。结果表明,近30 a来研究区盐沼面积呈大幅度先升后降又小幅度上升的趋势,至2015年盐沼面积减少了约18 km²;盐沼的空间位置不断向外扩张,最大扩张距离达到了5.5 km,盐沼的宽度也随着时间不断变化;盐沼植被类型发生了不同程度的演变,景观指数表明景观破碎化程度不断加剧,獐毛、碱蓬、芦苇大量减少,单一的互花米草覆盖湿地。对盐沼时空变化起到影响的自然因素和人为因素中,围垦活动的影响最为显著。

关键词: 盐沼湿地, 盐城沿海, 围垦活动

Abstract: Salt marsh is one of the major coastal wetland types in the world's temperate and subtropical regions. Taking Yancheng coastal area as an example and using 6 remote sensing satellite images of past 30 years, the temporal and spatial evolution of salt marsh in this area were analyzed by simple vegetation cover index (NDVI) crude extraction and visual interpretation. The influencing factors of these changes were also discussed. The results show that the area of salt marsh has risen and declined sharply at first and then risen slightly in the past 30 years, it has decreased about 18 km² so far. The salt marsh continues to expand outward, the maximum expansion distance reaches 5.5 km. The width of the salt marsh has also changed over time, salt marsh vegetation types have also undergone different degrees of evolution. The landscape index shows that landscape fragmentation is getting worse. Mane, suaeda and reeds have decreased significantly, and plenty of spartina covers the wetland. Among the natural and human factors that affect the temporal and spatial changes of salt marshes, the effects of reclamation activities are the most pronounced.

Key words: salt marsh wetland, Yancheng coastal area, reclamation activity

中图分类号:

P737.1

郑禹君, 时连强, 徐岱璐, 蒋祖荫, 郭俊丽. 近30 a来盐城沿海盐沼时空分布演变规律及影响因素分析[J]. 海洋学研究, 2018, 36(3): 57-66.

ZHENG Yu-jun, SHI Lian-qiang, XU Dai-lu, JIANG Zu-yin, GUO Jun-li. Analysis on the rules of spatial and temporal distribution of salt marsh in Yancheng coastal area over the past 30 years and its influencing factors[J]. Journal of Marine Sciences, 2018, 36(3): 57-66.

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近30 a来盐城沿海盐沼时空分布演变规律及影响因素分析

Analysis on the rules of spatial and temporal distribution of salt marsh in Yancheng coastal area over the past 30 years and its influencing factors

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