当前海洋科学发展的紧迫问题——中科院地学部院士第二次学术茶会记实

由中国科学院地学部主办的地学部院士、专家第二次学术茶会,于1995年7月19日在北京召开。地学部30多位院士和专家出席了茶会。这次学术会的中心议题是“当前海洋科学发展的紧迫问题”。首先,由几位海洋科学院士和专家做中心发言。     

中国全新世地层年表讨论会在大连举行

由中国第四纪研究委员会全新世分委员会和国家海洋局环境保护研究所共同主办的“中国全新世地层年表讨论会”于1984年10月16日—23日在大连市召开.这次会议是我国讨论全新世工作的第一次全国性的学术会议.到会的代表来自全国生产、科研和教学部门60个单位共100余人.他们都是对我国全新世研究有过许多贡献的专家、学者和热心于全新世研究的同志.会议收到论文摘要124篇,论文全文40篇.     

开展我国海洋区域地质调查势在必行

本文概述了建国以来我国海洋地质调查与研究工作取得的丰硕成果。论述区域地质调查在海洋地质基础工作和未来海洋开发中的战略意义,介绍了国内外海洋区域地质调查的现状,对开展这项调查的可行性条件,以及进行1/100万海洋区域地质调查的项目内容、技术方法和提交成果等提出了设想和建议。     

地矿部海洋高技术发展战略研讨会在上海召开

地矿部海洋高技术发展战略研讨会在上海召开由地矿部科技司主办的海洋高技术发展战略研讨会，于１９９６年４月８—９日在上海召开。参加会议的有部海办、石海局、广州局、上海局、青岛所、航空遥感中心、地科院、信息院的代表，陈毓川总工程师、张良弼司长和高平处长出席...     

当今海洋科学五大热点问题

进入９０年代，一些海洋科技发达国家的海洋调查计划、科学研究项目和国际性学术性讨论会的主题，几乎都集中围绕与人类生存和社会发展密切相关的环境与资源问题。其中最热门的话题可谓：全球变暖、自然灾害、海面上升、生态环境和海洋资源。１全球变暖的趋势科学家普遍认为，当今世界性工业的发展，大量能源的燃耗，向大气层排放超量的ＣＯ２、Ｈ２Ｓ及其他废气每年约５０×１０８ｔ，形成的“温室效应”而引起的全球性增温影响越来越明显。据统计资料表明，从１９５０～１９８５年，全球排放的ＣＯ２、Ｈ２Ｓ、氮氧化物、氯氟烃等物质增加…     

Contamination of organotin compounds and imposex in molluscs from Vancouver,Canada

Gastropods and bivalves were collected at 15 sites at Vancouver and Victoria, Canada between 24 May and 7 June, 1999, to establish tissue concentrations of butyltin and phenyltin compounds, to record imposex symptoms in gastropods, and to assess the present status of organotin contamination around Vancouver. No neogastropods (such as Nucella lima) were found around Vancouver. Neogastropod populations could have been extirpated by severe TBT contamination in Vancouver, as relatively high concentrations of TBT were detected in tissues of Mytilus trossulus from Vancouver, and the neogastropods distributed in Vancouver might be sensitive to TBT. Recovery from imposex, however, was observed in neogastropod populations from three sites at Victoria and Mission Point. TBT contamination has continued around Vancouver, arising from continuous use of TBT in antifouling paints for vessels larger than 25 m in length; however, TBT has decreased around Victoria and Mission Point. Different patterns of TBT accumulation in tissue were observed among the bivalve species from Vancouver. The highest TBT concentration detected in Tresus capax suggested some possible adverse effects. TBT was the most predominant butyltin component in almost all bivalve specimens surveyed, suggesting a low rate of TBT metabolism. Phenyltin compounds were not detected in any molluscan specimens in this study.     

Effects of prolonged exposure to 4-tert-octylphenol on toxicity and indices of oestrogenic exposure in the sand goby (Pomatoschistus minutus, Pallas)

Alkylphenolic compounds are present in estuarine and marine environments. They are moderately bioaccumulative, and oestrogenic to fish following three week, in vivo, exposures. The effects of prolonged exposure are, as yet, unclear. Sand goby (Pomatoschistus minutus) were exposed to measured concentrations of 4-tert-octylphenol (OP) in a 28-day, dose-ranging study, and a six month temporal response study. Following 28-days exposure to measured 31+/-6 or 101+/-47 microg l(-1) OP (mean+/-SD), immature male sand goby showed elevated vitellogenin (VTG) mRNA expression. Plasma alkali-labile phosphate concentrations were elevated in both sexes and were higher in females than males. Although measured OP concentrations were variable, they were significantly different for each treatment and a range of concentration-dependent effects were observed. The LC(50) for chronic OP exposure (8 weeks) was 29+/-6 microg l(-1), and both sexes demonstrated concentration and duration dependent increases in VTG mRNA expression. Exposure to 28+/-20 microg l(-1) OP (median+/-95% CI) for 6 months inhibited development of male nuptial colouration and sperm duct glands. These findings are discussed in relation to environmental concentrations of alkylphenols and ecological concerns.     

《200海里专属经济区及大陆架勘测》专项实施方案讨论会在沪召开

《２００海里专属经济区及大陆架勘测》专项实施方案讨论会在沪召开由地矿部海洋地质办公室召集的《２００海里专属经济区及大陆架勘测》专项实施方案讨论会，于１９９６年４月１０日在上海召开。与会的部石海局、广州局、上海局和青岛所等单位就海区勘测的具体实施方案和...     

“海洋地质灾害海洋环境”学术研讨会在青岛召开

由中国地质灾害研究会海洋地质灾害专业委员会，中国海洋学会海洋地质分会、中国地质学会海洋地质专业委员会、中国科学院海洋研究所、广东海洋湖沼学会、广东海洋学会南海石油开发环境研究会和青岛市地质学会联合主办的《海洋地质灾害海洋环境》学术研讨会，于1994年10月19—20日在青岛召开。来自沿海地区高教、科研、部委等部门的专家、教授和青年学者共42名代表参加了会议。