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首页> 外文期刊>Journal of marine systems: journal of the European Association of Marine Sciences and Techniques >The importance of vertical resolution in sea ice algae production models
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The importance of vertical resolution in sea ice algae production models

机译：垂直分辨率在海冰藻类生产模型中的重要性

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In this study an ice-algal mathematical model is used to resolve the vertical fine structtire of sea ice with ice algae, and results are compared to simulations with ice algae located only at the bottom ice layer and to those where ice algae are distributed homogeneously across part of the ice column. Ice algae are reported to contribute 4-26% of overall Arctic Ocean primary production and are an important food source for the ice-associated ecosystem. Thus, it is important to estimate the future impacts of global warming on the contribution of ice algae to Arctic primary production. Primary production models, describing the relationships between ice-algal physiology and population dynamics, with environmental forcing and trophic interactions involving bacteria and grazers, can be applied to quantify such impacts. One important aspect in these models is how to represent the vertical distribution of ice algae in sea ice. In most models, only the bottom ice layer is considered where most of the algal biomass tends to be concentrated. However, since ice algae are also present along the entire ice column, this may lead to underestimation of ice-algal production. Some empirical data and model results suggest that ice algae located in the surface and interior layers may be kept at lower concentrations, in spite of high growth rates, due to grazing by micro- and meiofauna. Results obtained in this study show the importance of resolving vertically the distribution of ice algae to avoid bias in primary production estimates, well in line with empirical studies. (C) 2015 Elsevier B.V. All rights reserved.
机译：在这项研究中，使用冰藻数学模型来解析含冰藻的海冰的垂直精细结构，并将结果与​​仅位于底部冰层的冰藻的模拟以及冰藻在冰层中均匀分布的模拟进行比较。冰柱的一部分。据报告，冰藻占北冰洋初级生产总量的4-26％，是与冰相关的生态系统的重要食物来源。因此，重要的是估计全球变暖对冰藻对北极初级生产的贡献的未来影响。初级生产模型可以用来量化这种影响，该初级生产模型描述了冰藻生理学和种群动态之间的关系，以及环境强迫和涉​​及细菌和放牧者的营养相互作用。这些模型中的一个重要方面是如何表示海藻中冰藻的垂直分布。在大多数模型中，仅考虑底部冰层，其中大部分藻类生物量倾向于集中。但是，由于整个冰柱中也存在冰藻，因此可能会导致冰藻产量的低估。一些经验数据和模型结果表明，由于微动物和小型动物的放牧，尽管生长速率很高，但位于表层和内层的冰藻仍可以保持较低的浓度。这项研究获得的结果表明，垂直解析冰藻的分布非常重要，这可以避免初级生产估算的偏差，这与经验研究一致。 （C）2015 Elsevier B.V.保留所有权利。

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