钦州湾茅岭江河口红树林湿地动态变化过程

doi:10.11978/2025021

Abstract

Abstract:

Mangrove wetlands, located in the intertidal zones of tropical and subtropical regions, are critically important coastal ecosystems, providing significant value in typhoon resistance, coastal seawall protection, and carbon sequestration. However, complex land-sea couplings have caused large-scale mangrove loss worldwide. Understanding the dynamic changes of mangrove wetlands is crucial for comprehensive grasping their losses and underlying causes, providing necessary support for their restoration. Based on the Google Earth Engine platform, this study extracted spatiotemporal dynamic information of mangrove wetlands at the Maolingjiang Estuary of Beibu Gulf from 1992 to 2021, and analyzed mangrove dynamics and associated influencing factors. The results showed that: (1) as of 2021, the tidal flats at the Maolingjiang Estuary contained 707.76 hm² of mangroves, with Aegiceras corniculatum as the building species. Mangroves were mainly distributed in the Dalidun and Tuanhedao tidal flats, with the least distribution in the Liangwu tidal flat near the southern side of the main stream. (2) From 1992 to 2021, the tidal flats at the Maolingjiang Estuary experienced a process of "increase-decrease-increase", while mangrove area consistently expanded. (3) From 1992 to 2021, the construction of aquaculture ponds was the primary driver of phased regional mangrove loss, while large-scale mangrove afforestation projects initiated since 2002 led to a significant rebound in mangrove coverage, with tidal flat progradation serving as the key natural facilitator for seaward mangrove expansion.

Key words: mangrove fringe line, tidal flat, Maolingjiang Estuary, Google Earth Engine

CLC Number:

X171.1

WANG Riming, SU Jinheng, DAI Zhijun, WU Tianliang, XIE Xiaowen, HUANG Chunmei, LI Xingrong, ZHANG Shangyu. Dynamic changes in mangrove wetland of the Maolingjiang Estuary, Qinzhou Gulf[J].Journal of Tropical Oceanography, 2025, 44(6): 143-154.

Figures/Tables 12

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序号	成像日期	时刻	卫星	分辨率/m	总体精度OA	Kappa系数
1	1992-10-23	10:32	Landsat 5 TM	30	0.95	0.94
2	1994-11-14	10:25	Landsat 5 TM	30	0.96	0.95
3	1996-12-21	10:33	Landsat 5 TM	30	0.95	0.94
4	1997-08-18	10:42	Landsat 5 TM	30	0.96	0.95
5	1998-08-21	10:49	Landsat 5 TM	30	0.92	0.91
6	1999-09-25	10:47	Landsat 5 TM	30	0.94	0.92
7	2000-09-11	10:49	Landsat 5 TM	30	0.96	0.95
8	2002-11-04	10:43	Landsat 5 TM	30	0.95	0.94
9	2003-04-13	10:45	Landsat 5 TM	30	0.93	0.92
10	2004-06-02	10:52	Landsat 5 TM	30	0.95	0.94
11	2006-12-17	11:05	Landsat 5 TM	30	0.97	0.96
12	2007-07-29	11:04	Landsat 5 TM	30	0.98	0.98
13	2008-05-12	10:59	Landsat 5 TM	30	0.97	0.96
14	2009-05-31	10:59	Landsat 5 TM	30	0.97	0.97
15	2011-06-22	11:00	Landsat 5 TM	30	0.96	0.95
16	2013-11-02	11:12	Landsat 8 OLI	30	0.93	0.92
17	2014-06-14	11:10	Landsat 8 OLI	30	0.93	0.91
18	2015-04-14	11:10	Landsat 8 OLI	30	0.96	0.95
19	2017-05-05	11:10	Landsat 8 OLI	30	0.95	0.94
20	2018-07-11	11:10	Landsat 8 OLI	30	0.98	0.98
21	2019-08-15	11:11	Landsat 8 OLI	30	0.98	0.98
22	2020-09-02	11:11	Landsat 8 OLI	30	0.98	0.98
23	2021-04-30	11:10	Landsat 8 OLI	30	0.96	0.96

序号	成像时间	时刻	卫星	分辨率/m	潮位/cm
1	1992-10-23	10:32	Landsat 5 TM	30	288
2	1997-08-02	10:42	Landsat 5 TM	30	298
3	2002-11-04	10:43	Landsat 5 TM	30	297
4	2007-07-29	11:04	Landsat 5 TM	30	279
5	2014-06-14	11:10	Landsat 8 OLI	30	297
6	2021-04-30	11:10	Landsat 8 OLI	30	280

断面序号	平均坡度	L/m
D1	0.22%	85.90
D2	0.69%	27.35
D3	0.39%	48.25
D4	0.24%	79.22

年份	裸滩面积/hm²	水域(养殖塘)面积/hm²	其他面积/hm²
1992—1997	1.25	0.08(0.00)	0.17
1997—2002	6.07	7.49(4.74)	1.17
2002—2007	1.25	0.92(0.67)	0.67
2007—2013	2.00	3.83(0.67)	0.33
2013—2018	4.58	6.32(4.24)	5.37
2018—2021	27.58	14.89(11.23)	3.25
总和	42.72	33.53(21.55)	10.94

Dynamic changes in mangrove wetland of the Maolingjiang Estuary, Qinzhou Gulf

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