Long-term trends in zooplankton of Dorset, Ontario, lakes: the probable interactive effects of changes in pH, total phosphorus, dissolved organic carbon, and predators
Long-term trends in zooplankton of Dorset, Ontario, lakes: the probable interactive effects of changes in pH, total phosphorus, dissolved organic carbon, and predators
复制标题
安大略省多塞特郡湖泊浮游动物的长期趋势：pH、总磷、溶解有机碳和捕食者变化的可能相互作用影响
DOI：
10.1139/f07-197
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发表时间：
2008
影响因子：
2.4
通讯作者：
J. Gunn
中科院分区：
文献类型：
--
作者：
N. Yan;K. Somers;R. Girard;A. M. Paterson;W. Keller;C. Ramcharan;J. Rusak;R. Ingram;G. E. Morgan;J. Gunn
丰度，体型，物种丰富度和物种组成的时间趋势表明，1980年和2003年之间，加拿大盾湖南部的甲壳类浮游动物群落发生了变化。尽管总磷减少，但总丰度并没有下降，但所有其他指标都发生了变化。在竖琴湖（安大略，加拿大）Bythotrephes入侵后，物种丰富度下降，但在其他三个湖泊丰富度增加。在7个湖泊中，平均枝晶藻体长从0.6毫米增加到1.0毫米，因为体型较大的类群取代了体型较小的类群。与水质和鱼类指标的相关性表明，枝角类的大小增加可归因于许多因素：在食物供应下降后，磷水平下降，增加了较大的食草动物的竞争优势，酸度下降有利于较大的，酸敏感的水蚤，并降低风险的reflectivory连接到溶解有机碳水平的上升和捕食制度的变化。浮游动物群落
Time trends in abundance, body size, species richness, and species composition indicate that crustacean zooplankton communities of southern Canadian Shield lakes changed between 1980 and 2003. Total abundance did not decline despite reductions in total phosphorus, but all other metrics changed. Species richness declined in Harp Lake (Ontario, Canada) following its Bythotrephes invasion, but richness increased in three other lakes. Average cladoceran body length increased from 0.6 to 1.0 mm in seven of the lakes, as larger-bodied taxa replaced smaller ones. Correlations with water quality and fish metrics suggest that cladoceran size increases were attributable to many factors: a decline in food availability following declining phosphorus levels increasing the competitive advantage of larger herbivores, a decline in acidity favouring the larger, acid-sensitive daphniids, and reduced risk of planktivory linked to a rise in dissolved organic carbon levels and changes in predation regimes. Zooplankton communi...