The accumulation of Zn, Se, Cd, and Pb and physiological condition of Anadara trapezia transplanted to a contamination gradient in Lake Macquarie, New South Wales, Australia
The accumulation of Zn, Se, Cd, and Pb and physiological condition of Anadara trapezia transplanted to a contamination gradient in Lake Macquarie, New South Wales, Australia
复制标题
DOI：
10.1016/j.marenvres.2006.12.009
复制
发表时间：
2007-07-01
影响因子：
3.3
通讯作者：
Bayne, B.
中科院分区：
文献类型：
--
作者：
Burt, A.;Maher, W.;Bayne, B.
这种名为Anadara trapezia的底栖双壳类是从一个“干净”的参照点采集的，并沿着新南威尔士州麦夸里湖疑似微量金属污染的梯度被移植。每个月测量一次表层沉积物和整个组织中的锌、硒、镉和铅的浓度以及它们的生理状态(生长范围)。沉积物中的锌、镉和铅的浓度从南到南呈下降趋势，其中鸡湾区的浓度最高，表明这是主要的污染源。锌、镉和铅的浓度接近或高于[ANZECC/ARMCANZ，2000]。国家水质管理战略文件4.澳大利亚和新西兰淡水和海水水质准则、澳大利亚和新西兰自然保护委员会以及澳大利亚和新西兰农业和资源管理委员会。Cockle Creek、Warners Bay和Koorooa Bay的沉积物质量指南。微量金属浓度的显著差异不能归因于颗粒大小或铁浓度的差异。怀特切兹泻湖富铁细粒沉积物中Se含量最高，可能与发电有关。痕量金属含量随时间变化不大。斜方藻组织中锌、镉和铅的含量与沉积物中的含量规律相似。贝类和沉积物中锌和铅的浓度高度相关，表明了显著的暴露剂量关系。斜方藻移植到湖中后，组织中的硒含量较高，但所有移植的贝类中的硒含量相似，表明污染底泥中的硒不是生物体的主要硒来源。斜方藻移植到麦夸里湖90d后，其生理状况有所下降，部分位置的清除速率和呼吸速率以及所有位置的吸收效率都存在显著差异。污染最严重的科克尔湾的平均增长范围明显低于其他地点。显著的锌暴露-剂量反应关系表明，锌的生物积累是对沉积物污染的响应。显著的镉暴露-反应关系表明，镉可能影响贝类的健康。铅暴露-剂量、暴露-反应和剂量-反应的显著关系表明，Ph可能正在影响麦格理湖贝类的健康。因此，沉积物中锌、镉和铅的浓度可能会影响麦格理湖贝类的健康。(C)2007爱思唯尔有限公司。保留所有权利。
The benthic bivalve, Anadara trapezia, was collected from a 'clean' reference site and transplanted along a suspected trace metal contamination gradient in Lake Macquarie, NSW. At monthly intervals, Zn, Se, Cd and Pb concentrations were measured in the surficial sediments and whole tissues of the cockle as well as their physiological condition (Scope for Growth).Zinc, Cd and Pb concentrations in sediments decreased together, southward, with the highest concentrations in the Cockle Bay area, suggesting that this is the main source of contamination. Zinc, Cd and Pb concentrations were near or above [ANZECC/ARMCANZ, 2000. National water quality management strategy paper 4. Australian and New Zealand Guidelines for Fresh and Marine Water Quality, Australian and New Zealand Conservation Council and Agriculture and Resource Management Council of Australia and New Zealand. pp. 3.5.-1-3.5-10] sediment quality guidelines at Cockle Creek, Warners Bay and Koorooa Bay. Significant differences in trace metal concentrations could not be attributed to grain size or Fe concentration differences. Se concentrations were highest in fine grain Fe rich sediments of Whitcheads Lagoon, and likely to be associated with power generation operations. Trace metal concentrations did not vary significantly over time.Zinc, Cd and Pb concentrations in the tissues of A. trapezia followed a similar pattern to that of sediments. Zinc and Ph concentrations in cockles and sediments were highly correlated, indicating significant exposure-dose relationships. Selenium concentrations in the tissues of A. trapezia were higher after transplantation to the lake, however, Se concentrations were similar in all transplanted cockles, indicating that Se in contaminated sediments is not the major source of Se to organisms.There was a decline in the physiological condition of A. trapezia transplanted to Lake Macquarie after a 90-day-period with marked differences in clearance rates and respiration rates at some locations and absorption efficiencies at all locations. The mean Scope for Growth value at the most contaminated location, Cockle Bay, was markedly lower than at other locations. A significant Zn exposure-dose response relationship indicates that Zn bioaccumulation is occurring in response to sediment contamination. A significant Cd exposure-response relationship indicates that Cd may be influencing the health of cockles. Significant Pb exposure-dose, exposure-response and doseresponse relationships indicate that Ph probably is affecting the health of cockles in Lake Macquarie. Therefore, Zn, Cd and Ph concentrations in sediments are likely to be affecting the health of cockles in Lake Macquarie. (c) 2007 Elsevier Ltd. All rights reserved.