Center for Coastal Monitoring and Assessment, NOAA/NOS, 1305 E. W. Hwy., N/SCI-1, Silver Spring, MD, 20910, USA.
Environ Monit Assess. 2019 Apr 5;191(5):264. doi: 10.1007/s10661-019-7376-5.
A baseline environmental characterization of Chrome and Dogfish bays on the Kenai Peninsula, Alaska, was conducted using a sediment quality triad approach. Resident fish and blue mussel body burdens were also assessed. The data was derived from a larger study that assessed seven distinct water bodies on the Kenai Peninsula's north side, draining into Kachemak Bay. Sampling sites for water quality measurements and sediment were randomized within each embayment. Concentrations of 140 organic and elemental contaminants were analyzed. Habitat parameters (depth, salinity, temperature, dissolved oxygen, sediment grain size, and organic carbon content) that influence elemental distribution were also measured at each sampling site. Chrome Bay and Dogfish Bay open into lower Cook Inlet and had coarser sediments than the other bays studied. Concentrations of chromium and nickel were extremely high in Chrome Bay. Concentrations were several times higher than observed concentrations seen throughout other locations in south-central Alaska. Other elemental concentrations varied between and within bays, with several locations exceeding lower sediment quality guidelines. Whole sediment amphipod toxicity bioassays were conducted with sediments from Chrome Bay. No sample exhibited significant mortality or sublethal effects. Body burdens of three species of fish and mussels collected in Chrome Bay did not exhibit elevated concentrations relative to other studies in Kachemak Bay or the Alaska Dept. of Environmental Conservation, Fish Monitoring Program. Despite the very high concentrations of Cr and Ni in the sediments, the metals do not appear to be bioavailable to resident biota.
对阿拉斯加基奈半岛的铬湾和狗鱼湾进行了基线环境特征描述，采用了沉积物质量三联体方法。还评估了当地鱼类和贻贝的体内负荷。该数据来自一项更大的研究，该研究评估了基奈半岛北侧流入卡彻马克湾的七个不同水体。水质测量和沉积物采样点在每个港湾内随机化。分析了 140 种有机和元素污染物的浓度。还在每个采样点测量了影响元素分布的栖息地参数（深度、盐度、温度、溶解氧、沉积物粒度和有机碳含量）。铬湾和狗鱼湾通向下库克湾，其沉积物比研究的其他海湾更粗糙。铬湾中的铬和镍浓度极高。浓度比在阿拉斯加中南部其他地区观察到的浓度高出数倍。其他元素浓度在海湾之间和内部变化，有几个地点超过了较低的沉积物质量指南。对铬湾的沉积物进行了全沉积物端足类动物毒性生物测定。没有一个样本显示出显著的死亡率或亚致死效应。在铬湾采集的三种鱼类和贻贝的体内负荷与在卡彻马克湾或阿拉斯加环境保护部鱼类监测计划中观察到的其他研究相比，没有显示出升高的浓度。尽管沉积物中的 Cr 和 Ni 浓度非常高，但这些金属似乎对当地生物群没有生物利用度。
