The costs of moulting in Daphnia;: mineral regulation of carbon budgets
The costs of moulting in Daphnia;: mineral regulation of carbon budgets
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DOI：
10.1046/j.1365-2427.2000.00670.x
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发表时间：
2000-10-01
影响因子：
2.7
通讯作者：
Rukke, NA
中科院分区：
文献类型：
--
作者：
Hessen, DO;Rukke, NA
1.浮游动物的元素含量不同。对于必需元素钙(Ca)和磷(P)，水蚤(Daphnia spp.)与其他枝角类和桡足类相比，它们的含量特别高，因此要求也很高。最近有迹象表明，浮游动物的生长，特别是大型水蚤，可能直接受到磷和钙的供应的限制。主要的磷和钙与甲壳有关，蜕皮过程代表着这些元素以及碳(C)从动物体内的持续流失。蜕皮对磷和钙的需求可能会限制动物体内的碳积累，因此对这些元素的广泛需求可能会转化为在远洋食物网中运输的碳的全部损失。虽然蜕皮的成本对浮游动物来说是相当大的，但在大多数湖泊中，结合在蜕皮中的矿物质的出口只会对表层元素的预算起到很小的作用。
1. Zooplankton differ in their elemental contents. For the essential elements calcium (Ca) and phosphorus (P), Daphnia spp. have particularly high contents, and thus high demands, compared with other cladocera and copepods.2. There are recent indications that the growth of zooplankton, notably Daphnia, may be directly constrained by the availability of P and Ca.3. Major pools of P and Ca are associated with the carapace, and the moulting process represents a constant drain of these elements, as well as carbon (C), from the animals.4. The demands for P and Ca for moulting may pose constraints on the carbon accumulation in the animals, and thus the extensive needs for these elements may translate into a total loss of C transported in the pelagic food web.5. While the costs of moulting are substantial for the zooplankton, the export of minerals bound in the moult will play only a minor role for the epilimnetic element budgets in most lakes.