Do cyclopoid copepods control Daphnia populations in early spring, thereby protecting their juvenile instar stages from food limitation?
Do cyclopoid copepods control Daphnia populations in early spring, thereby protecting their juvenile instar stages from food limitation?
复制标题
桡足类桡足类是否在早春控制水蚤种群，从而保护其幼龄阶段免受食物限制？
DOI：
10.1080/03680770.1992.11900212
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
B. Santer
中科院分区：
文献类型：
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作者：
B. Santer
摘要圆足类桡足类在淡水系统中起着重要的作用。在许多湖泊中，它们在一年中的很长一段时间内都是占主导地位的动物园动物。在它们的生命周期中，摄食习惯从草食性转变为肉食性。幼体阶段主要以藻类为食，晚期桡足类阶段和成体是捕食性的，可能对浮游动物群落有很大的影响。L. AMPERT & SCHO-BEII.（1978）观察到春季在康斯坦茨湖有剑水蚤桡足类时水蚤的死亡率很高，尽管枝水蚤的食物条件很好。他们假设，捕食性剑水蚤阶段控制了春季的水蚤种群，从而保护了食草性剑水蚤幼体免受水蚤的食物竞争。在北方德国的一个小型富营养化湖泊Schierensee湖中，观察到从剑水蚤为主的冬季群落向枝水蚤夏季群落的转变（现为AK 1975年）。因此，对该湖剑水蚤桡足类和枝角类之间的相互作用进行了详细的研究。估计枝角类上的环状体捕食是联合的!通过对水蚤种群丰度和实验捕食率的分析，在自然条件下，有和没有捕食性剑水蚤的水蚤种群的观察，剑水蚤控制水蚤种群的能力提供了进一步的测试。
Introduction eyclopoid copepods play an important role in freshwater systems. In many lakes they are the dominant zooplankters for long periods within the year. During their life cycle a shift in the feeding habit from herbivory to carnivory takes place. While the juvenile instar stages feed mostly on algae the late copepodite stages and the adults are predaceous and might have a strong influence on the zooplankton community. l. AMPERT & ScHo-BEII.(1978) observed a high mortality of Daphnia in the presence of cyclopoid copepods in spring in Lake eonstance, despite good food conditions for the cladoceran. They hypothesized that the predatory cyclopoid stages controlled the Daphnia population during spring, thereby protecting the herbivorous cyclopoid juveniles from food competition with Daphnia. In Lake Schierensee, a small eutrophic lake in Northern Germany, a shift from a cyclopoid dominated winter community to a cladoceran summer community was observed (Now AK 1975). Accordingly a detailed study of the interactions between cyclopoid copepods and cladocerans was undertaken in this lake. eyclopoid predation on cladocerans was estimated joint! y by the analyses of population abundances and experimental predation rates on Daphnia. Observations of Daphnia populations under natural conditions, with and without the predaceous cyclopoids, provided further tests of the ability of cyclopoids to control Daphnia populations.
PEG/链霉亲和素共固定生物纳米球的表面设计及其在近红外生物标记中的应用
DOI：
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发表时间：
2010
期刊：
影响因子：
--
作者：
上村真生;徳善公一;曽我公平;長崎幸夫
通讯作者：
長崎幸夫