Magnusson K, Ekelund R, Grabic R, Bergqvist P-A
Department of Marine Ecology, Göteborg University, Kristineberg Marine Research Station, SE 450 34 Fiskebäckskil, Sweden.
Mar Environ Res. 2006 May;61(4):379-95. doi: 10.1016/j.marenvres.2005.11.004. Epub 2006 Jan 18.
Field concentrations of polychlorinated biphenyls (PCBs) were measured in sediment and nine marine soft bottom invertebrate species. Lipid- and organic carbon normalised biota-sediment accumulation factors (BSAFs) were determined for 29 nonplanar and 11 coplanar congeners. To investigate whether the bioaccumulation was in thermodynamic equilibrium with the sediment, the determined BSAFs were compared to theoretically calculated ones to obtain a BSAFdet./BSAFtheor-ratio. Large interspecific variations were found: one suspension feeding and one deposit feeding species of brittle stars (Amphiura filiformis and A. chiajei), and one predatory polychaete (Glycera rouxii) had ratios>1 for congeners with logKow>6.5. In these species there was also a linear relationship between logKow and BSAF, both for coplanar and for planar congeners but with lower values for coplanar ones. For other species the pattern was more scattered. Only the deposit feeding polychaete Melinna cristata had BSAFdet./BSAFtheor-ratios<1 for all congeners. Thus, the interspecific variations in bioaccumulation did not correlate with differences in feeding strategies, but may be caused by differences in biotransformation, and in age and size of the analysed specimens.
在沉积物和九种海洋软底无脊椎动物物种中测量了多氯联苯（PCBs）的现场浓度。针对29种非平面和11种共平面同系物，测定了脂质和有机碳归一化的生物-沉积物积累因子（BSAFs）。为了研究生物累积是否与沉积物处于热力学平衡状态，将测定的BSAFs与理论计算值进行比较，以获得BSAFdet./BSAFtheor比率。发现种间差异很大：一种悬浮取食和一种沉积取食的蛇尾类物种（丝状双鳞蛇尾和乔氏双鳞蛇尾），以及一种捕食性多毛类动物（鲁氏吻沙蚕），对于logKow>6.5的同系物，其比率>1。在这些物种中，对于共平面和平面同系物，logKow与BSAF之间也存在线性关系，但共平面同系物的值较低。对于其他物种，模式更为分散。只有沉积取食的多毛类动物皱鳃缨鳃蚕的所有同系物的BSAFdet./BSAFtheor比率<1。因此，生物累积的种间差异与取食策略的差异无关，但可能是由生物转化以及分析样本的年龄和大小差异引起的。
