Heavy metal compartmentalisation in salt marsh and seagrass of the urbanised Swartkops estuary, South Africa

被引：1

作者：

Nel, Marele A. ^{[1
,2
,3
]}

Adams, Janine B. ^{[1
,3
]}

Rubidge, Gletwyn ^{[4
]}

Human, Lucienne R. D. ^{[2
,3
]}

机构：

[1] Nelson Mandela Univ, DSI NRF Res Chair Shallow Water Ecosyst, Summerstrand South Campus, Gqeberha, South Africa

[2] Elwandle Coastal Node Nelson Mandela Univ, South African Environm Observat Network SAEON, Ocean Sci Campus,4 Gomery Ave, ZA-6031 Summerstrand, Gqeberha, South Africa

[3] Nelson Mandela Univ, Dept Bot, PSouth Campus,OB 77 000, ZA-6031 Summerstrand, South Africa

[4] Nelson Mandela Univ, Dept Chem, Summerstrand North Campus,POB 77 000, ZA-6031 Gqeberha, South Africa

来源：

MARINE POLLUTION BULLETIN | 2023年 / 192卷

基金：

新加坡国家研究基金会; 芬兰科学院;

关键词：

Wetland; TXRF; Phytoremediation; Heavy metals; Sink; SPARTINA-ALTERNIFLORA; CONSTRUCTED WETLANDS; RETENTION CAPACITY; POSIDONIA-OCEANICA; CONTAMINATED SITES; RIVER ESTUARY; ACCUMULATION; PLANTS; MACROPHYTES; COPPER;

D O I：

10.1016/j.marpolbul.2023.115007

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Wetland plants are naturally exposed to high metal concentrations, and often have mechanisms to prevent metal toxicity. This study compared metal concentrations in seagrass (Zostera capensis) and salt marsh (Spartina mar-itima, Salicornia tegetaria)- to determine their niche as metal sinks. Samples were collected in each season over a year at five sites in the estuary and analysed using a Total X-Ray Fluorescence (TXRF) spectrometer. Spartina maritima and S. tegetaria accumulated in their roots, and displayed little translocation to leaves (BCF = 1-14; TF[leaf/root] < 1). Contrastingly, Z. capensis showed high uptake to its leaves (TF[leaf/root] = 1-8; Mn, Zn, Cr, Pb, Ni, Cu). Spartina maritima and S. tegetaria were identified as good phytostabilisers (BCF > 1, TF[leaf/root] < 1). Compartmentalization was unique to each species, and considering their ecosystem service importance, more plant species should be analysed to estimate their ecological value for management purposes.

引用

页数：12

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