Phytoplankton chlorophyll a in Lake Poyang and its tributaries during dry, mid-dry and wet seasons: a 4-year study
Phytoplankton chlorophyll a in Lake Poyang and its tributaries during dry, mid-dry and wet seasons: a 4-year study
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DOI：
10.1051/kmae/2013088
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发表时间：
2014
影响因子：
1.8
通讯作者：
Zhongdao Wu;X. Lai;Liqing Zhang;Yongjiu Cai;Y. B. Chen
中科院分区：
文献类型：
--
作者：
Zhongdao Wu;X. Lai;Liqing Zhang;Yongjiu Cai;Y. B. Chen
研究了鄱阳湖浮游植物叶绿素a的变化，并与鄱阳湖支流的观测结果进行了比较。2009年1月至2013年1月在旱季、中旱季和雨季采集了样本。结果表明，丰水期叶绿素a浓度显著高于旱季和中旱季（p <0.05），而旱季和中旱季的叶绿素a浓度差异不显著。在潮湿的季节，水下光条件显着升高和水的保留时间大幅增加（25.5天）。综合考虑，丰水期叶绿素a浓度显著高于枯水期和中枯水期，营养盐对浮游植物的影响不明显。鄱阳湖三个季节的持水时间变化较大，说明鄱阳湖具有河流和湖泊的混合特征。在旱季和旱季中期的短停留时间产生的叶绿素a之间的湖泊和它的支流没有区别，而在雨季的长停留时间有利于浮游植物在湖泊中的生长。
Variations in phytoplankton chlorophyll a were studied in Lake Poyang, and these variations were compared with those observed in its tributaries. Samples were collected from January 2009 to January 2013 during the dry, mid-dry and wet seasons. The study showed that chlorophyll a concentrations were significantly higher in the wet season than in the dry and mid-dry seasons (p between the two ecosystems during the wet season but not during the dry and mid-dry seasons. During the wet season, the underwater light conditions were significantly elevated and water retention time increased substantially (25.5 d). In combination, these factors contributed to a significantly higher chlorophyll a concentration during the wet season than that during the dry and mid-dry seasons in the lake; the effect of nutrients on the phytoplankton was not obvious. The large variations in water retention time during the three seasons indicated that Lake Poyang has the combined characteristics of a river and a lake. The short retention times during the dry and mid-dry seasons produced no difference in chlorophyll a between the lake and its tributaries, whereas the long retention time during the wet season facilitated phytoplankton growth in the lake.