The role of food availability and phytoplankton community dynamics in the seasonal succession of zooplankton community in a subtropical reservoir
The role of food availability and phytoplankton community dynamics in the seasonal succession of zooplankton community in a subtropical reservoir
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DOI：
10.1016/j.limno.2014.01.002
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发表时间：
2014-03-01
期刊：
影响因子：
1.7
通讯作者：
Hsieh, Chih-hao
中科院分区：
文献类型：
--
作者：
Chang, Chun-Wei;Shiah, Fuh-Kwo;Hsieh, Chih-hao
浮游动物演替的季节模式可以用温度和降水等物理因素来解释。虽然在一些温带湖泊中，生物因素，如食物的可获得性和组成的影响已得到理论和研究的承认，但食物的可获得性和组成如何影响浮游动物群落的季节演替，特别是在热带/亚热带湖泊，仍然不清楚，也存在争议。在这项研究中，我们应用多元分析方法，对台湾一个亚热带水库的三年时间序列中的物理化学因素、各种食物来源(初级和细菌生产)以及浮游植物和浮游动物物种组成进行了分析。我们的结果表明：(1)除了物理因素外，食物可获得性的季节性变化也是浮游动物季节演替的部分原因。特别是，在决定浮游动物种群的年际变化方面，食物供应的年际变化被证明比物理因素更重要。具体地说，有限的食物供应放大了浮游动物群落生物量和组成的季节变化幅度；(Ii)浮游动物和浮游植物在物种组成方面的联系比在其生物量方面更强，这意味着浮游动物和浮游植物在群落水平上存在很强的相互作用。(C)2014年爱思唯尔股份有限公司。版权所有。
Seasonal patterns of zooplankton succession have been explained by physical factors such as temperature and precipitation. While the influence of biological factors, such as food availability and composition, has been recognized in theory and studies in some temperate lakes, how food availability and composition affect the seasonal succession of zooplankton communities, especially in tropical/subtropical lakes, is still unclear and under debate. In this study, we applied multivariate analyses to a 3-year time series of physicochemical factors, various food sources (primary and bacterial production), and phytoplankton and zooplankton species composition in a subtropical reservoir in Taiwan. Our results demonstrated that (i) in addition to physical factors, seasonal variation of food availability partly explains zooplankton seasonal succession. In particular, inter-annual variation of food availability proved more important than physical factors in determining the inter-annual variation in zooplankton populations. Specifically, limited food supply amplifies the amplitude of seasonal variation of zooplankton community biomass and composition; (ii) the association between zooplankton and phytoplankton was stronger when regarding their species composition than when regarding their biomass, implying a strong interaction between zooplankton and phytoplankton at the community level. (C) 2014 Elsevier GmbH. All rights reserved.