基于VSD模型的铁山港湾红树林生态系统脆弱性初步评价

doi:10.11978/2017055

Abstract

Abstract:

According to the three elements of “exposure-sensitivity-adaptive capacity,” an index system framework of mangrove ecosystem vulnerability assessment was established based on a VSD (vulnerability scoping diagram) evaluation model. Redefining the vulnerability classification criteria, improved comprehensive index method and fuzzy evaluation method were applied to quantitatively evaluate the mangrove ecosystem vulnerability of Tieshangang Bay in 1989, 2003 and 2014, respectively. The results showed that the mangrove ecosystem vulnerability comprehensive evaluation index values in these three years were 0.145, 0.255 and 0.334, respectively; the scores increased over the years, indicating the Tieshangang Bay ecosystem vulnerability tended to be increasingly vulnerable. First, the mangrove ecosystem exposure index of Tieshangang Bay was increasing, and the major artificial stress factors were reclamation areas and the discharge of wastewater. Second, the sensitivity of Tieshangang Bay mangrove ecosystem was obviously intense, the main sensitive factors were comprehensive index of marine life quality, biological diversity indexes of benthos and intertidal organisms. Last but not least, the adaptive capacity of the ecosystem increased slightly, but is generally weaker.

Key words: vulnerability, mangrove, ecosystem, assessment, Tieshangang

Xiaowei LI, Zimei HUANG, Jianfeng CHEN, Xin WANG, Jiangling WEI. Preliminary assessment of Tieshangang Bay mangrove ecosystem vulnerability based on VSD model[J].Journal of Tropical Oceanography, 2018, 37(2): 47-54.

Figures/Tables 7

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References 21

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子目标层		要素层		指标层
编号	内容	编号	内容	编号	内容	指标指向
A1	暴露程度	B1	人为胁迫	C1	滩涂围垦面积比	+
				C2	陆源污染排放量	+
				C3	临海工业废水排放量	+
				C4	海域养殖污染排放量	+
		B2	自然压力	C5	风暴潮灾害个数	+
				C6	海平面上升速率	+
				C7	大气污染程度	+
				C8	外来物种入侵程度	+
A2	敏感性	B3	环境状态	C9	水质状况	-
				C10	沉积物状况	-
				C11	生物质量状况	-
				C12	日照时长	-
				C13	降水量	-
				C14	大风天数	+
		B4	生物状态	C15	浮游植物多样性	-
				C16	浮游动物多样性	-
				C17	底栖生物多样性	-
				C18	潮间带生物多样性	-
A3	适应能力	B5	社会响应	C19	海洋环境保护政策	+
		B5	社会响应	C20	公众保护意识	+
		B6	生态弹性	C21	红树林种类	+
		B6	生态弹性	C22	红树林覆盖度	+

研究指标	Q_n	Q_n′	W_n
C1	0.0967	0.0632	0.0800
C2	0.0591	0.0418	0.0504
C3	0.0513	0.0318	0.0415
C4	0.0338	0.0526	0.0432
C5	0.0091	0.0038	0.0064
C6	0.0256	0.0074	0.0165
C7	0.0998	0.0176	0.0587
C8	0.0702	0.0343	0.0522
C9	0.0584	0.0262	0.0423
C10	0.1107	0.0262	0.0685
C11	0.0360	0.0211	0.0285
C12	0.0046	0.0338	0.0192
C13	0.0063	0.0338	0.0200
C14	0.0063	0.0428	0.0245
C15	0.0361	0.0865	0.0613
C16	0.0494	0.0865	0.0679
C17	0.0554	0.0865	0.0710
C18	0.0350	0.1082	0.0716
C19	0.0338	0.0367	0.0353
C20	0.0841	0.0367	0.0604
C21	0.0129	0.0815	0.0472
C22	0.0256	0.0408	0.0332

	Ⅰ	Ⅱ	Ⅲ	Ⅳ	Ⅴ
V值	[-0.1761, 0.0239)	[0.0239, 0.2239)	[0.2239, 0.4239)	[0.4239, 0.6239)	[0.6239, 0.8239]
状态	微脆弱	轻脆弱	中脆弱	重脆弱	极脆弱

年份	子目标层	隶属度
年份	子目标层	很低	较低	一般	较高	很高
1989年	暴露程度	0.1037	0.2421	0.0032	0.0000	0.0000
	敏感性	0.0589	0.2686	0.0836	0.0223	0.0415
	适应能力	0.0302	0.0891	0.0568	0.0000	0.0000
2003年	暴露程度	0.0955	0.1714	0.0820	0.0000	0.0000
	敏感性	0.0767	0.0939	0.0513	0.2433	0.0096
	适应能力	0.0000	0.0850	0.0910	0.0000	0.0000
2014年	暴露程度	0.0000	0.0917	0.1578	0.0994	0.0000
	敏感性	0.0000	0.0000	0.2115	0.2132	0.0501
	适应能力	0.0000	0.0332	0.1164	0.0264	0.0000

Preliminary assessment of Tieshangang Bay mangrove ecosystem vulnerability based on VSD model

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