Research on spatio-temperal evolution of landscape pattern in island group——A case study of Dongtou Archipelago

doi:10.3969/j.issn.1001-909X.2024.04.010

Abstract

Abstract:

Island group is a typical form of existence for offshore islands in China. Investigating the evolution of landscape patterns in an island group and among individual islands can provide theoretical foundations and technical support for island resource management. Based on the high-resolution remote sensing images of six inhabited islands (Dongtou Island, Banping Island, Dasanpan Island, Huagang Island, Niyu Island and Zhuangyuanao Island) in Dongtou District in 2008, 2014, 2018 and 2022, the landscape pattern indices of island groups and individual islands were calculated. The results indicate the following: (1) During the study period, the proportions of forest land, water areas, and cultivated land in the landscape of island group have been continuously declining, while the proportions of building land, industrial and mining land, and road areas have been steadily increasing. (2) The landscape pattern changes on Dongtou Island, Dasanpan Island, Niyu Island, and Zhuangyuanao Island are significant, with the former two primarily characterized by an increase in building land and the latter two by an increase in industrial and mining land; the landscape patterns of Banping Island and Huagang Island are relatively stable. (3) Development activities among the islands are interrelated, with the landscape evolving in an orderly manner. The transformations of forest land into mining areas on Niyu Island and Dasanpan Island have supported the reclamation and subsequent development of water areas on Dongtou Island and Zhuangyuanao Island; as the larger islands develop, the development of surrounding smaller islands has also begun.

Key words: Dongtou, landscape pattern, land utilization, development pattern, remote sensing, aerial image

CLC Number:

P901
P237

HE Zhuoxi, GUO Fenfen, LAI Xianghua, HU Taojun, CHEN Qingsong. Research on spatio-temperal evolution of landscape pattern in island group——A case study of Dongtou Archipelago[J]. Journal of Marine Sciences, 2024, 42(4): 114-122.

Figures/Tables 7

References 26

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影像数据	成像时间	空间分辨率/m	数据来源
1∶10 000数字正射影像图(DOM)	2008-08-21	0.8	浙江省测绘资料档案馆
1∶10 000数字正射影像图(DOM)	2014-12-16	0.5	浙江省测绘资料档案馆
资源三号(ZY-3)卫星	2018-02-11	1.5	中国资源卫星应用中心
高分六号(GF-6)光学卫星	2022-09-15	2.0	中国资源卫星应用中心

影像数据	成像时间	空间分辨率/m	数据来源
1∶10 000数字正射影像图(DOM)	2008-08-21	0.8	浙江省测绘资料档案馆
1∶10 000数字正射影像图(DOM)	2014-12-16	0.5	浙江省测绘资料档案馆
资源三号(ZY-3)卫星	2018-02-11	1.5	中国资源卫星应用中心
高分六号(GF-6)光学卫星	2022-09-15	2.0	中国资源卫星应用中心

景观类别	分类说明	景观类别	分类说明
林地	大片的、聚集的山地植被	工矿用地	工矿业生产用地
草地	以草本植物为主的土地	道路	公路、城市道路和允许社会机动车通行的路
耕地	种植、耕种的土地	水域	湖泊、池塘以及河流等水体
建筑用地	居民点、商业区以及人工建筑用地	未利用土地	裸露的沙地以及未开发利用的土地

景观类别	分类说明	景观类别	分类说明
林地	大片的、聚集的山地植被	工矿用地	工矿业生产用地
草地	以草本植物为主的土地	道路	公路、城市道路和允许社会机动车通行的路
耕地	种植、耕种的土地	水域	湖泊、池塘以及河流等水体
建筑用地	居民点、商业区以及人工建筑用地	未利用土地	裸露的沙地以及未开发利用的土地

景观指数	年份	景观类型
景观指数	年份	草地	道路	耕地	工矿用地	建筑用地	林地	水域	未利用土地
斑块面积百分比/%	2008年	1.94	6.08	4.00	3.20	11.76	49.23	14.81	8.98
	2014年	2.99	6.39	3.58	6.86	12.41	46.33	9.83	11.60
	2018年	2.52	7.65	3.19	8.07	14.11	45.90	5.56	13.00
	2022年	2.93	7.82	2.91	10.79	16.26	45.75	4.79	8.76
最大斑块指数/%	2008年	0.25	0.23	0.53	0.79	1.78	12.60	4.07	3.11
	2014年	0.28	0.25	0.28	0.95	1.78	12.33	3.91	4.93
	2018年	0.28	0.72	0.28	0.95	1.78	12.15	3.37	1.09
	2022年	0.28	0.72	0.28	0.95	1.78	12.19	3.37	1.06
斑块密度 /(个·km^-2)	2008年	120.57	262.06	136.58	28.93	271.69	18.94	1.58	74.12
	2014年	125.13	268.86	143.05	29.85	280.32	19.32	1.48	79.88
	2018年	124.34	268.07	142.22	29.92	274.94	19.06	1.26	81.02
	2022年	122.76	267.39	142.85	29.77	270.16	19.03	1.19	80.84