南极拉斯曼丘陵湖泊水化学特征

本文介绍南极拉斯曼丘陵湖泊水化学特征。对１３个湖泊的调查和统计分析表明，湖水以Ｎａ＋和Ｃｌ－为主要优势离子，不含有ＣＯ３２－离子，营养物质（Ｎ、Ｐ、ＳｉＯ２）在湖水中普遍偏低，而且湖水和雪样无机氮组分均以ＮＨ４＋为主，水化学类型比较单一，都属氯化物Ｎａ＋型贫营养水体。Ｎａ＋、Ｃｌ－、ＳＯ４２－的高浓度，特别是Ｂｉｇ湖、莫愁湖和Ｈｅａｒｔ湖水中离子含量明显的高，指示拉斯曼丘陵地区的降水来源以海洋气团为主，并受海洋环境影响强烈。微量元素分布在０．０１～２．０μｇ／ｌ之间，接近于水圈这些元素的浓度值。     

长江中下游湖泊淡水贝类的分布及物种多样性

本文记录了长江中下游湖泊贝类１１０种,其中腹足类１０科５６种,双壳类５科５４种,并对长江中下游主要湖泊贝类的区系、物种多样性进行比较。     

ABUNDANCE AND PRODUCTION OF LIMNODRILUS HOFFMEISTERI （OLIGOCHAETA ： TUBIFICIDAE） IN ALGAE-DOMINATED LAKE HOUHU （WUHAN, CHINA）

April, 1996 to March, 1997 studies on the abundance and secondary production of Limnodrilus hoffmeisteri in an algae-dominated lake showed that the worm density and biomass peaked in December at 152 ind/m^2 and 0.087 g/m^2 , respectively. The secondary production of the animal was 0.294g/m^2 fresh wt/a. The turnover rate (P/B ratio) was 11.4.     

HYDROBIOLOGY OF A FLOODING ECOSYSTEM, LAKE CHENHU IN HANYANG, HUBEI, WITH PRELIMINARY ESTIMATION OF ITS POTENTIAL FISHERY PRODUCTION CAPACITY

For the purpose of fishery development, a hydrobiological investigation of Lake Chenhu was carried out in 1983 with reference to the productivity of various food organisms as well as fish. Of the entire lake, the annual net primary production was determined to be 27,818 ×106 kcal for phytoplankton, 2,898×106 kcal for macrophytes and 64,840×106 kcal for wet land vegetation. The annual secondary production chiefly from gastropods was 2,632×106 kcal. On the basis of 1981?982 fishery data, the production of the main stocked fishes in the lake was also roughly computed. Analysing all obtained production data, we find the energy conversion rate of food organisms to fish in the water at the present stage is fairly low. Even in 1982, the year of better fishery management, food energy converted to plankton feeders or herbivores was only 1.6-1.8%; energy converted to fish yield was even lower, only 0.2?.8%. To get a potential fish output of the ecosystem, a tentative estimation of fishery capacity of Lake Che     

ENERGY FLOW OF BELLAMYA AERUGINOSA IN A SHALLOW ALGAL LAKE, HOUHU LAKE (WUHAN, CHINA)

ＩＮＴＲＯＤＵＣＴＩＯＮＢｅｌｌａｍｙａａｅｒｕｇｉｎｏｓａｉｓａｇａｓｔｒｏｐｏｄｓｐｅｃｉｅｓｂｅｌｏｎｇｉｎｇｔｏＶｉｖｉｐａｒｉｄａｅ .Ｂｅｉｎｇａｄｅｔｒｉｔｉｖｏｒｅ,ｔｈｅｓｐｅｃｉｅｓｉｓｃｏｍｍｏｎｌｙｐｒｅｓｅｎｔｉｎｍｏｓｔｆｒｅｓｈｗａｔｅｒｂｏｄｉｅｓ.Ｉｎｂｉｏｍａｓｓ,ｔｈｉｓａｎｉｍａｌｉｓｐｒｏｂａｂｌｙｔｈｅｆｉｒｓｔｄｏｍｉｎａｎｔｓｐｅｃｉｅｓｏｆｍａｃｒｏｚｏｏｂｅｎｔｈｏｓ,ｓｏｉｔｐｌａｙｓａｎｉｍｐｏｒｔａｎｔｒｏｌｅｉｎｍａｔｅｒｉａｌｃｉｒｃｕｌａ…     

草型湖泊与藻型湖泊大型底栖动物生产力的比较

较系统地比较了典型草型湖泊(扁担塘)与典型藻型湖泊(后湖)底栖动物优势种类、主要类群及整个群落的周年生产量.结果表明,典型草型湖泊扁担塘底栖动物群落的周年生产量(湿重或带壳湿重)38.926g/穴m2·a雪比典型藻型湖泊后湖47.505g/穴m2·a雪为低.各类群具体情况为,后湖(藻型湖泊)的营养水平较高,更适合苏氏尾鳃蚓等耐污性种类的生长,因此寡毛类生产量较扁担塘的为高;藻型湖泊比草型湖泊更适合铜锈环棱螺等腐生螺类的生长,螺类的生产量也比草型湖泊略高;藻型湖泊摇蚊的生产量较高,原因在于藻型湖泊更适合具有较多耐污种类的摇蚊生长.但从大型底栖动物群落生产量的组成看,摇蚊、软体动物、寡毛类等三大类群所占份额相对较稳定,分别为14%-15%、77%-79%、7%-8%.     

Energy Flow of Macrozoobenthos Community in an Algal Lake, Houhu Lake（Wuhan, China）

INTRODUCTIONMacrozoobenthos ,amajorgroupofaquaticfauna ,playsanimportantroleinthematerialcycleandenergyflowinawaterecosystem .Inrecentdecades ,interestinthebioenergeticsofthisgrouphasgrownrapidly .Aspectsofthebioenergeticsofmanybenthicfreshwaterspecieshavebeenpub lished .Owingtodifficultyinsamplecollectionandspecimenprocessing ,studiesofthebenthiccom munityhavereceivedlessattention .Withfisherydevelopmentandthelakeeutrophicationproblem ,investigationsontheecologicalfunctionofthelakecommun…     

黄淮海平原封丘试区水体营养状态的综合评价

选择封丘试区内有代表性的7类水体,对其营养状态进行综合评价和聚类分析,初步提出了用于水体营养状态评价的方法和标准。结果表明:各水体营养状态可依其植物组成而明显分成挺水植物、沉水植物和浮游植物型等,而且草型水体的营养指数均高于藻型水体。总的看来,该试区各类水体营养状态较为相似,营养指数均很高,属富营养—重富营养型,渔业发展潜力较大。     

武汉后湖湖球蚬的周年生产量

采用体长频率法和瞬时生长率法对后湖湖球蚬Sphaerium lacustre的周年生产量进行了测算. 结果表明两种方法得到的生产量较为吻合.生产量的带壳湿重和去壳干重分别是体长频率法1.048 g/(m2a) 0.0599 g/(m2a); 瞬时生长率法1.178 g/(m2a), 0.0673 g/(m2a).对应的P/B系数为3.23.4.     

On the organic compounds in water of Mochou Lake and Heart Lake in Larsemann Hills,Antarctica

ＯｎｔｈｅｏｒｇａｎｉｃｃｏｍｐｏｕｎｄｓｉｎｗａｔｅｒｏｆＭｏｃｈｕＬａｋｅａｎｄＨｅａｒｔＬａｋｅｉｎＬａｒｓｅｍａｎｎＨｉｌｌｓ，ＡｎｔａｒｃｔｉｃａTX＠李植生＠陈旭东＠张银华＠梁小民＠王骥＠梁彦龄Ｏｎｔｈｅｏｒｇａｎｉｃｃｏｍｐｏｕｎｄｓｉｎｗａｔ...