Ganf G G
International Biological Programme, Royal Society African Freshwater Biological Team, Freshwater Biological Association, Ambleside, Westmorland.
Limnologisches Institut der Universität, Berggasse 18/19, A-1090, Wien IX, Austria.
Oecologia. 1974 Mar;16(1):9-29. doi: 10.1007/BF00345085.
Lake George, a shallow lake in western Uganda, supports a permanent and dense crop of phytoplankton, and may be regarded as eutrophic although the ambient concentrations of inorganic nitrogen and phosphorus are low. The figures for the annual nutrient loadings (Viner and Smith, 1973) would suggest, however, a eutrophic lake when analysed on the scheme of eutrophication proposed by Vollenweider (1968).The horizontal distribution of chlorophyll a shows a concentric pattern, with the maximum values occurring towards the center. This horizontal variation is thought to reflect water movements, and a general pattern of water flow is proposed.The majority of the species show no seasonal variation but populations of both Anabaena and Melosira show annual variations. These two species also have a horizontal distribution pattern which is the reverse of other species. This pattern is used to support the proposed movements of water.Phytoplankton generation times are discussed in relation to the diurnal cycle occurring in Lake George.
乔治湖位于乌干达西部，是一个浅水湖，那里生长着永久性的密集浮游植物群落，尽管无机氮和磷的环境浓度较低，但仍可被视为富营养化湖泊。然而，根据沃伦韦德（1968年）提出的富营养化方案分析，年度养分负荷数据（维纳和史密斯，1973年）表明该湖是富营养化的。叶绿素a的水平分布呈现出同心模式，最大值出现在湖中心。这种水平变化被认为反映了水流运动，并提出了水流的总体模式。大多数物种没有季节性变化，但鱼腥藻和直链藻的种群数量有年度变化。这两个物种也有与其他物种相反的水平分布模式。这种模式被用来支持所提出的水流运动。文中讨论了乔治湖浮游植物的世代时间与昼夜循环的关系。
