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首页> 外文期刊>ICES Journal of Marine Science >Scaling of size, shape and surface roughness in Antarctic krill swarms
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Scaling of size, shape and surface roughness in Antarctic krill swarms

机译：南极磷虾群的大小，形状和表面粗糙度的缩放

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摘要

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 L, thickness T, perimeter P, and area A of 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 thickness T increases on average as L0.67 and has a log-normal distribution within each length class. The perimeter and area scale with L and T as P similar to L0.77T and A similar to L0.86T0.48. The swarm aspect ratio, T/L, decreases approximately as L-0.32. The surface roughness (defined as P/A) has a weak dependence on swarm length and decreases approximately as T-0.46, 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.
机译：南极磷虾是专性种群，它们形成的群的大小和形状可能对营养相互作用和生物地球化学通量产生重大影响。因此，将大小和形状的可变性参数化是了解南部海洋生态系统运行的有用步骤。我们分析了2003年夏季在南大洋的大西洋海域获得的开放式磷虾群的4650个垂直横截面的长度L，厚度T，周长P和面积A之间的关系。我们的数据表明，这些参数是紧密相关。厚度T平均增加L0.67，并且在每个长度类别内均具有对数正态分布。 L和T为P的周长和面积比例类似于L0.77T，而A类似于L0.86T0.48。群集纵横比T / L大约降低为L-0.32。表面粗糙度（定义为P / A）对蜂群长度的依赖性较弱，并且大约以T-0.46减小，这只能通过蜂群形状的凹痕和空洞的出现来解释。总体而言，我们的研究发现，南极磷虾似乎能够形成的种群规模和形状存在明显的局限性，我们探索了造成这些局限性的潜在解释性因素。

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