Scaling of size, shape and surface roughness in Antarctic krill swarms

Scaling of size, shape and surface roughness in Antarctic krill swarms
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南极磷虾群的大小、形状和表面粗糙度的缩放

DOI:
10.1093/icesjms/fsz005
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发表时间:
2019
影响因子:
3.3
通讯作者:
Ryabov A
Ryabov A
中科院分区:
农林科学2区
文献类型:
--
作者:
Ryabov A

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南极磷虾是专性的群体,它们形成的群体的大小和形状可以对营养相互作用和生态地球化学通量产生重大影响。因此,参数化大小和形状的变化是了解南大洋生态系统运作的有用步骤。本文分析了2003年夏季在南大洋大西洋部分获得的4650个开阔洋磷虾群垂直剖面的长度、厚度、周长和面积之间的关系。我们的数据表明,这些参数是密切相关的。在各长度级内,厚度平均增加,呈对数正态分布.周长和面积与和和成比例。群展弦比减小约为。表面粗糙度(定义为)有一个弱的依赖于群长度和减少约为,这只能解释为在群形状的压痕和空腔的外观。总体而言,我们的研究发现,南极磷虾似乎能够形成的群体的大小和形状有明显的限制,我们探讨了导致这些限制的潜在解释因素。
Antarctic krill are obligate swarmers and the size and shape of the swarms they form can have a major influence on trophic interactions and biogeochemical fluxes. Parameterizing variability in size and shape is therefore a useful step toward understanding the operation of the Southern Ocean ecosystem. We analyse the relationships between the length, thickness, perimeter, and areaof 4650 vertical cross-sections of open-ocean krill swarms obtained within the Atlantic sector of the Southern Ocean in summer 2003. Our data show that these parameters are tightly interrelated. The thicknessincreases on average asand has a log-normal distribution within each length class. The perimeter and area scale withandasand. The swarm aspect ratio,, decreases approximately as. The surface roughness (defined as) has a weak dependence on swarm length and decreases approximately as, which can be explained only by the appearance of indentations and cavities in the swarm shape. Overall, our study finds that there are distinct limits to the size and shape of swarms that Antarctic krill appear to be capable of forming and we explore the potential explanatory factors contributing to these limitations.
西斯科舍海南极极锋区——1975 年夏季
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