Heavy metal accumulation affected by Spartina alterniflora invasion in estuarine wetland sediments

Rong-rong XIE; Ru-lin WU; Chen TANG; Yue-ting LAI; Kai-sheng GONG; Jia-bing LI

doi:10.31497/zrzyxb.20200518

Journals >Journal of Natural Resources >Volume 35 >Issue 5 >Page 1238 > Article

Journal of Natural Resources
Vol. 35, Issue 5, 1238 (2020)

Heavy metal accumulation affected by Spartina alterniflora invasion in estuarine wetland sediments

Rong-rong XIE^1、2, Ru-lin WU¹, Chen TANG¹, Yue-ting LAI¹, Kai-sheng GONG¹, and Jia-bing LI^1、2、*

Author Affiliations

¹College of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, China

²Key Laboratory of Pollution Control and Resource Recycling of Fujian Province, Fujian Normal University, Fuzhou 350007, China

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DOI: 10.31497/zrzyxb.20200518 Cite this Article

Rong-rong XIE, Ru-lin WU, Chen TANG, Yue-ting LAI, Kai-sheng GONG, Jia-bing LI. Heavy metal accumulation affected by Spartina alterniflora invasion in estuarine wetland sediments[J]. Journal of Natural Resources, 2020, 35(5): 1238 Copy Citation Text

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Fig. 1. Sampling sites in the research area

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Fig. 2. Vertical distribution of physicochemical properties for different Spartina alterniflora invasion periods

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Fig. 3. Vertical distribution of sediment heavy metals for different Spartina alterniflora invasion periods

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Fig. 4. Vertical distribution of sediment heavy metals retention for different Spartina alterniflora invasion periods

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重金属	样本数/个	范围/(mg/kg)	平均值/(mg/kg)	重金属	样本数/个	范围/(mg/kg)	平均值/(mg/kg)
Co	123	1.36~91.48	7.41	Cu	123	6.50~99.10	21.60
Ni	123	2.30~223.40	13.50	As	123	0.42~35.90	5.78

Table 1. Background values of sediment heavy metals in the coastal zone of Fujian province

I_geo	分级	污染程度	I_geo	分级	污染程度
I_geo<0	0	无污染	3≤I_geo<4	4	强污染
0≤I_geo<1	1	无污染~轻度污染	4≤I_geo<5	5	强污染~极强污染
1≤I_geo<2	2	中度污染	I_geo≥5	6	极强污染
2≤I_geo<3	3	中度污染~强污染

Table 2. Geo-accumulation index of heavy metals and their grades in sediments

元素	Co	Ni	Cu	As
$T_{r}^{i}$	5	5	5	10

Table 3. Toxicity coefficient of different heavy metals in sediments (mg/kg)

潜在生态风险度	轻微	中度	强	很强	极强
生态风险因子 $E_{r}^{i}$	$E_{r}^{i}$ <40	40≤ $E_{r}^{i}$ <80	80≤ $E_{r}^{i}$ <160	160≤ $E_{r}^{i}$ <320	$E_{r}^{i}$ ≥320
生态风险指数RI	RI<150	150≤RI<300	300≤RI<600	RI≥600	—

Table 4. Potential ecological risk assessment of heavy metals

	平均高度/m	地上生物量/(g/m²)	植株密度/(株/m²)	田间持水量/%
A	0.45	3.99×10²	130±11	44.11±3.65
B	1.00	13.45×10²	121±10	43.88±8.37
C	1.50	24.42×10²	116±8	44.98±3.75

Table 5. Vegetation characteristics of the community for different Spartina alterniflora invasion periods

相关性评价方法	指标	Co	Ni	Cu	As
Pearson相关	Co	1
	Ni	0.697^**	1
	Cu	0.539^**	0.726^**	1
	As	0.334	0.451^**	0.710^**	1
	总碳	0.394^*	0.308	0.663^**	0.479^**
	总氮	0.311	0.228	0.628^**	0.503^**
	碳氮比	-0.244	-0.207	-0.550^**	-0.434^*
	电导率	0.338	0.500^**	0.438^**	0.166
	pH	-0.461^*	-0.775^**	-0.678^**	-0.401^*
	容重	-0.585^**	-0.619^**	-0.936^**	-0.692^**
	黏粒比例	0.444	0.328	0.155	0.168
	粉粒比例	0.343	0.040	-0.164	0.070
	沙粒比例	-0.428	-0.163	0.045	-0.126
Spearman相关^a	地上生物量	1.000^**	1.000^**	1.000^**	1.000^**

Table 6. Correlation analysis for sediment heavy metals and other physical biochemistry characteristics in the research area

研究区域	Co	Ni	Cu	As	文献来源
鳝鱼滩	20.56~30.28	35.69~44.17	18.06~41.25	156.53~196.94	本文
福建省海岸带沉积物重金属背景值	1.36~91.48	2.3~223.4	6.5~99.1	0.42~35.9	[16]
江苏如东互花米草盐沼湿地	—	3.74	6.66	6.68	[24]
黄河口新生湿地	9.7~16.1	24.51~40.85	16.85~33.87	—	[25]
华东沿海滩涂	—	—	2.8~370	1.1~27.2	[26]
包头市南海湿地	—	87.67	111.18	75.1	[27]
辽河口盐沼湿地	—	—	24.29	12.23	[28]
云南河流湿地	24.6~56.5	34.5~64.7	57.3~650	754~4948	[29]
澳大利亚悉尼河口红树林湿地	0.2~23	0.66~48	1.0~206	0.52~35	[30]
越南巴拉特河口	—	—	14.9~67.2	6.9~31.0	[31]
阿根廷布拉卡海湾湿地	—	5.18~11.37	8.86~15.51	—	[32]
印度贝兰杜尔湖泊湿地	—	15.1~138.4	105~1147.8	—	[33]
印度马特拉河口湿地	46~196.7	—	51.8~189	—	[34]

Table 7. Comparison of heavy metal concentration between the research area in this paper and other similar research areas (mg/kg)

点位	Co	Ni	Cu	As
A	4.56±0.92	8.29±0.51	5.08±0.44	37.27±1.58
B	4.80±0.18	8.48±0.29	5.48±0.32	38.17±4.65
C	5.76±0.25	9.92±0.36	7.66±0.58	43.58±1.69

Table 8. Changes of heavy metals retention in wetland sediments (0-30 cm) for different Spartina alterniflora invasion periods (g/m²)

采样点	Co		Ni		Cu		As
采样点	I_geo	级数	I_geo	级数	I_geo	级数	I_geo	级数
A	0.961	1	0.881	1	-0.627	0	4.234	5
B	0.986	1	0.899	1	0.174	1	4.260	5
C	1.001	2	0.998	1	0.884	1	4.420	5

Table 9. Geo-accumulation index of sediment heavy metals in the research area

采样点	$E_{r}^{i}$				RI
采样点	Co	Ni	Cu	As	RI
A	14.60	13.81	4.86	282.25	315.52
B	14.85	13.98	5.29	287.44	321.56
C	15.01	14.97	8.65	321.10	359.73

Table 10. Potential ecological risk index of sediment heavy metals in the research area

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