Using the biotic ligand model for predicting the acute sensitivity of Cladoceran dominated communites to copper in natural surface waters
Using the biotic ligand model for predicting the acute sensitivity of Cladoceran dominated communites to copper in natural surface waters
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DOI：
10.1021/es049907d
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发表时间：
2004-10-01
影响因子：
11.4
通讯作者：
Janssen, CR
中科院分区：
文献类型：
--
作者：
Bossuyt, BTA;De Schamphelaere, KAC;Janssen, CR
在这项研究中，急性铜的敏感性，实地收集的枝藻物种进行了测定，使用其自然表面沃茨和标准的重建测试水作为测试介质。共有43种，收集了两次从6个不同的网站，代表不同的水类型和化学在欧洲。所采集的物种属于4个不同的科（水蚤科，Bosminidae，Macrothricidae，Chydoridae）和11个不同的属（水蚤属，Ctetelophaphnia，Ceriodaphnia，Simocephalus，Scapholeopsis，Alona，Acropherus，Chydorus，Eurycercus，Disperiona，Pleuroxus）。在急性实验与固定为终点，48小时的中位有效浓度（48小时EC 50）的枝藻物种范围从5.30至70.6杯铜L-1在标准测试水和9.60至853杯铜L-1在自然沃茨。平均站点敏感性（几何平均值的48小时EC 50值的物种在一个社区内）范围从10.1至27.4马克杯的铜L-1在标准水和16.4至281马克杯的铜L-1在天然水。这表明，生物利用度是更重要的比社区间（物种组成）的差异，在确定不同的水生系统中的铜毒性的变化。对于四个表面沃茨的pH值范围内的急性大型蚤生物配体模型（BLM）已被成功验证，BLM预测48小时的EC 50值为27的28个测试的枝藻物种内的因素2的观测值。对于相同的网站，所有社区的敏感性预测在2.3的因素。BLM对于所测试的两种酸性表面沃茨明显过度保护。因此，ELM可以被认为是一个有价值的工具，估计铜的潜在有害影响的天然枝藻群落，但更多的研究将需要酸性表面沃茨。
In this study, the acute copper sensitivity of field-collected cladoceran species was determined using their natural surface waters and a standard reconstituted test water as test medium. A total of 43 species were collected on two occasions from six different sites, representing different water types and chemistries in Europe. The collected species belonged to four different families (Daphniidae, Bosminidae, Macrothricidae, Chydoridae) and 11 different genera (Daphnia, Ctenodaphnia, Ceriodaphnia, Simocephalus, Scapholeberis, Alona, Acroperus, Chydorus, Eurycercus, Disparalona, Pleuroxus). In acute experiments with immobilization as end point, the 48-h median effective concentrations (48-h EC50) for the cladoceran species ranged from 5.30 to 70.6 mug of Cu L-1 in standard test water and from 9.60 to 853 mug of Cu L-1 in natural waters. The mean site sensitivity (the geometric mean of 48-h EC50 values of species within a community) ranged from 10.1 to 27.4 mug of Cu L-1 in standard water and from 16.4 to 281 mug of Cu L-1 in natural water. This indicates that bioavailability is more important than inter-community (species composition) differences in determining the variability of copper toxicity across different aquatic systems. For the four surface waters that had a pH within the range for which the acute Daphnia magna biotic ligand model (BLM) has previously been successfully validated, the BLM predicted 48-h EC50 values for 27 of the 28 tested cladoceran species within factor of 2 of the observed values. For the same sites, all community sensitivities were predicted within a factor of 2.3. The BLM was clearly over-protective for the two acidic surface waters tested. Hence, the ELM can be considered a valuable tool for estimating the potentially harmful effects of copper to natural cladoceran communities, but more research will be needed for acidic surface waters.