The forms and distribution of carbon in a deep, oligotrophic lake (Loch Ness, Scotland)
The forms and distribution of carbon in a deep, oligotrophic lake (Loch Ness, Scotland)
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贫营养深湖（苏格兰尼斯湖）中碳的形式和分布
DOI：
10.1080/03680770.1995.11900728
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发表时间：
1997
期刊：
影响因子：
4
通讯作者：
J. Young
中科院分区：
文献类型：
--
作者：
Roger I. Jones;J. Laybourn;M. Walton;J. Young
在过去的二十年中，对“微生物环”的认识从根本上改变了我们对海洋和淡水生态系统中浮游生物食物链结构的看法。由于微生物循环提供了一种机制，可将溶解的有机碳（DOC）向上输送至食物链，因此引起了人们对湖泊中 DOC 的来源和利用的新兴趣。普遍接受的范式是浮游细菌依赖于浮游生物群落内通过光合作用产生的 DOC，并由浮游植物直接释放或通过浮游动物放牧间接释放。然而，一些作者（例如 WETZEL 1995）坚持认为，来自沿海地区或周围流域的外部供应的 DOC 发挥着重要作用！ e.最近对主要在 Fennoscandia 的腐殖质湖泊的研究表明，DOC 的异地输入可以支撑此类湖泊中浮游生物的新陈代谢（参见 oNES 1992 年的评论）。 DEL GIORGIO & l'ETERS (1994) 表明，外来 DOC 对浮游生物代谢的贡献可能比人们想象的更为普遍，即使在富营养化程度较高的湖泊中也是如此。然而，目前对al!尺寸的详细研究还很少。湖泊中上层区域的有机碳库，以及已发表的那些主要涉及富营养化（例如 VADSTEIN 等人，1989）或高度腐殖质（例如 HESSEN 等人，1990）的湖泊。分析寡营养湖泊中的碳库在技术上要求很高，因为浓度低，因此需要处理大量的水才能获得可测量的碳量。然而，寡营养湖泊数量丰富，而且作为对干扰敏感的水资源而受到特别重视，因此更多关于其碳动态的信息应该成为湖泊学研究的重中之重。我们对苏格兰贫营养深湖尼斯湖的浮游生物碳动态进行了详细研究。在本文中，我们提供了有关尼斯湖碳的形式和分布的一些初步信息。
During the last two decades, recognition of the" microbialloop" has fundamentally altered our view of plankton food chain structure in both marine and freshwater ecosystems. Since the microbialloop provides a mechanism by which dissolved organic carbon (DOC) can be channelled up the food chain, it has led to renewed interest in the sources and utilisation of DOC in lakes. The generally accepted paradigm has been that bacterioplankton is dependent on DOC generated photosynthetically within the plankton community and released either directly by the phytoplankton or indirectly by zooplankton grazing. However, a few authors (eg WETZEL 1995) have maintained that DOC supplied externally, from the littoral zone or from the surrounding catchment, plays an important ro! e. Recent studies of humic lakes, mainly in Fennoscandia, have demonstrated that allochthonous inputs of DOC can underpin mu eh of the metabolism of plankton in such lakes (see review by} oNES 1992). DEL GIORGIO & l'ETERS (1994) showed that the contribution of allochthonous DOC to plankton metabolism is probably more ubiquitous than has been thought, even in more eutrophic lakes. However, there are still very few detailed studies of the sizes of al! pools of organic carbon in the pelagic zone of lakes, and those that have been published mostly deal with eutrophic (eg VADSTEIN et al. 1989) or highly humic (eg HESSEN et al. 1990) lakes. Analysing carbon pools in oligotrophic lakes is technically demanding because of the low concentrations and hence the large volumes of water that need to be processed to obtain measurable quantities of carbon. Nevertheless, oligotrophic lakes are both numerically abundant and particularly valued as water resources which are sensitive to disturbance, so that more information on their carbon dynamics should be a high priority in limnological research. We have conducted a detailed study of the plankton carbon dynamics in Loch Ness, a deep, oligotrophic lake in Scotland. In this paper, we present some preliminary information on the forms and distribution of carbon in Loch Ness.