Lewis Michael A, Dantin Darrin D, Chancy Cynthia A, Abel Kathryn C, Lewis Christopher G
U.S. Environmental Protection Agency, Office of Research and Development, National Health & Environmental Effects Research Laboratory, Gulf Ecology Division, 1 Sabine Island Drive, Gulf Breeze, FL 32561, USA.
Environ Pollut. 2007 Mar;146(1):206-18. doi: 10.1016/j.envpol.2006.04.041. Epub 2006 Oct 16.
Contaminant concentrations were determined for media associated with 13 Florida seagrass beds. Concentrations of 10 trace metals were more commonly detected in surface water, sediment and two seagrass species than PAHs, pesticides and PCBs. Concentrations of copper and arsenic in surface water exceeded Florida aquatic life criteria more frequently than other trace elements. Total organic carbon, mercury, chromium, zinc, total chlordane, total PAHs, total PCBs, DDD and DDE were significantly greater in seagrass-rooted sediments than adjacent non-vegetated sediments. Total DDT, DDD, DDE, total chlordane, arsenic, copper and nickel exceeded proposed sediment quality guidelines at six of 13 grass beds. Pesticides, PAHs, and PCBs were below detection in seagrass tissues. Mercury, cadmium, nickel, lead and silver were detected in 50% or more of the tissues for Thalassia testudinum (turtle grass) and Halodule wrightii (shoal grass). Spatial, interspecific and tissue differences were usually an order of magnitude or less.
测定了与佛罗里达州13个海草床相关介质中的污染物浓度。与多环芳烃、农药和多氯联苯相比，在地表水、沉积物和两种海草物种中更常检测到10种痕量金属的浓度。地表水中铜和砷的浓度比其他痕量元素更频繁地超过佛罗里达州水生生物标准。海草根际沉积物中的总有机碳、汞、铬、锌、总氯丹、总多环芳烃、总多氯联苯、滴滴滴和滴滴伊显著高于相邻的无植被沉积物。在13个海草床中的6个，总滴滴涕、滴滴滴、滴滴伊、总氯丹、砷、铜和镍超过了建议的沉积物质量准则。海草组织中未检测到农药、多环芳烃和多氯联苯。在50%或更多的泰来草和矮大叶藻组织中检测到汞、镉、镍、铅和银。空间、种间和组织差异通常在一个数量级或更小。
