Comment. What drives plankton seasonality in a stratifying shelf sea? Some competing and complementary theories
Comment. What drives plankton seasonality in a stratifying shelf sea? Some competing and complementary theories
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评论。
DOI：
10.1002/lno.11036
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发表时间：
2018
影响因子：
4.5
通讯作者：
Atkinson A
中科院分区：
文献类型：
--
作者：
Atkinson A
西英吉利海峡的普利茅斯 L4 时间浮游生物系列是浅层分层陆架海系统的教科书示例。在 30 年的每周采样中，该站点提供了一套多样化且对比鲜明的浮游生物水华形成、物候和季节演替的数值和概念模型。这些论文中最新的，Kenitz 等人。 (2017) 发起了这一评论，部分原因是我们认为它对该地点的浮游生物组成以及强劲、反复出现的季节性演替的描述略有误导。我们通过说明该地点发生的物候的年际变化程度来解决这个问题，并且需要在模型中更好地捕获这些变化。然而，我们的主要目标是促进各种自上而下和自下而上的流程更好地整合，这些流程都被认为是推动季节性演替的关键。其中一些，特别是导致所谓“漏洞假说”的多重放牧和生长控制可能是互补的，但其他一些，例如桡足类摄食性状在驱动物种演替中的作用（Kenitz等人，2017）提供了可检验的竞争假设。所有这些模型的基本假设和输出都需要根据时间序列数据和过程研究（包括发现非选择性喂养）进行更严格的验证。我们建议浮游生物物候学的变异性（而不仅仅是平均时间和幅度）可用于诊断浮游生物演替替代模型的性能。
The Plymouth L4 time plankton series in the Western English Channel is a textbook example of a shallow, stratifying shelf sea system. Over its 30 yr of weekly sampling, this site has provided a diverse and contrasting suite of numerical and conceptual models of plankton bloom formation, phenology, and seasonal succession. The most recent of these papers, Kenitz et al. (2017) has initiated this comment, partly because we feel that it has presented a slightly misleading picture of the plankton composition at this site, and of a robust, recurring seasonal succession. We address this by illustrating the extent of inter‐annual variability in phenology that occurs at the site, and which needs to be captured better within models. However our main aim is to foster a much better integration of the variety of top‐down and bottom‐up processes that have all been suggested to be key in driving seasonal succession. Some of these, particularly the multiple grazing and growth controls contributing to the so‐called “loophole hypothesis” may be complementary, but others, such as the role of copepod feeding traits in driving species succession (Kenitz et al. 2017) offer testable competing hypotheses. The basic assumptions and outputs of all these models need to be validated more critically, both against time series data and process studies that include the finding of unselective feeding. We suggest that the variability in plankton phenology (and not just mean timing and amplitude) could be used to diagnose the performance of alternative models of plankton succession.
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DOI：
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DOI：
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发表时间：
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DOI：
--
发表时间：
1992
期刊：
影响因子：
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