共查询到20条相似文献，搜索用时 15 毫秒
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L.A. Yarbro P.R. Carlson T.R. Fisher J.P. Chanton W.M. Kemp 《Estuarine, Coastal and Shelf Science》1983,17(5):555-570
A sediment budget for the Choptank River, one of the three largest estuaries on the eastern shore of Chesapeake Bay, was developed from measurements of sediment carried in upland runoff, shore erosion, sedimentation, and levels of suspended sediments in estuarine waters. Shore erosion was the major source of sediment (340 × 106 kg y?1), contributing seven times more sediment than upland runoff. Low relief, the rural character of the Coastal Plain drainage basin, and the susceptibility of poorly consolidated shoreline materials to erosion contributed to the dominance of shore erosion over runoff as a sediment source. Box modelling indicated a net annual flux (14–44 × 106 kg y?1) of sediment from the Choptank River to Chesapeake Bay. A mass balance estimate of sedimentation, calculated as the difference between total inputs and loss at the mouth of the estuary, (350 × 106 kg y?1) agreed well with an estimate based on 210Pb profiles (340 × 106 kg y?1) measured along the longitudinal axis of the estuary. Lead-210 sedimentation rates correspond to accumulation rates of 1·5–7·9 mm y?1. 相似文献
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美国的海洋信息技术基础设施计划 总被引：2，自引：0，他引：2
介绍了美国海洋信息技术基础设施指导委员会提出的海洋信息技术基础设施计划，包括计划实施的必要性和目前存在的一些主要问题以及计划实施的主要内容。 相似文献
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陈国华，男，1938年2月生，浙江建德人，汉族。1960年毕业于山东大学化学系。现任青岛海洋大学化学系教授，海洋化学专业博士牛导师，中国海洋湖沼海洋化学分会常务理事，山东省化学学会胶体与界面化学专业委员会委员。长期从事海洋化学专业教学工作及海洋物理化学方面研究，他是山东省1988年首批科学技术优秀拔尖人才，1995年又被山东省委、省政府授予第四批科学技术优秀拔尖人才称号。1988年获中华人民共和国人事部授予国家有突出贡献中青年专家称号。1991年曾被山东省教委、省科委等部门评为山东省高等学校先进科技工作者。享受国务院政… 相似文献
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C Minier F Levy D Rabel G Bocquené D Godefroy T Burgeot F Leboulenger 《Marine environmental research》2000,50(1-5):373-377
The Seine Bay is used as a pilot area to assess the usefulness of monitoring programmes using a suite of biological measurements. These biomarkers included ethoxyresorfin-O-deethylase (EROD) and acetylcholinesterase (AChE) activities, multixenobiotic resistance (MXR) protein expression level assessment and gonad histopathology. Samples of European flounder collected in three sites close to the Seine Estuary in late September 1998 showed that 8% of the males were intersex, i.e. had gonads with both male and female tissues. Another 10% of individuals, identified as male by morphological observation during sampling, showed only female tissues on histological sections. These dramatic changes were associated with different patterns of EROD activity, MXR expression or AChE activity inhibition that might reflect shorter time effects of xenobiotics and constitute a starting point to integrate biological responses for the assessment of the health status of flounder in the Seine Bay. 相似文献
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J.B. Wilson 《Estuarine, Coastal and Shelf Science》1983,17(5):592-593
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《ICES Journal of Marine Science》2006,63(2):192-193
The marine sciencecommunity lost an advocate and a tireless friend with the suddenpassing of Dr Joseph A. Brown on the 4th of September 2005. After graduating from high school in Grey, Maine, Joe movedto Canada and completed a BSc degree at St Francis Xavier Universityin 1968. After serving two years in the US Army, he returnedto Canada and went on 相似文献
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Copper concentrations in surface waters off the southeastern United States coast range from 0.02 to 0.33 μg/kg (0.3–5.2 nmol/kg). Mean concentrations are lowest in Onslow Bay (0.07 μg/kg) and highest over the Blake Plateau (0.20 μg/kg). An explanation, compatible with the hydrography and hydrodynamics of the area, is proposed for the observed regional variations. 相似文献