A marine zooplankton community vertically structured by light across diel to interannual timescales.
A marine zooplankton community vertically structured by light across diel to interannual timescales.
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一个在昼夜到年际时间尺度上由光照垂直构建的海洋浮游动物群落。
DOI：
10.1098/rsbl.2020.0810
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发表时间：
2021-03
期刊：
影响因子：
3.3
通讯作者：
Varpe Ø
中科院分区：
文献类型：
--
作者：
Hobbs L;Banas NS;Cohen JH;Cottier FR;Berge J;Varpe Ø
许多水生类群的捕食风险主要是由视觉搜索捕食者，通常是环境光的功能。一些研究表明，视觉捕食的变化将成为气候变化对极地海洋生态系统的主要影响。高北极经历极端的季节性在光环境中，从24小时的光到24小时的黑暗，因此提供了一个天然的实验室，研究光和捕食风险超过昼夜季节性时间尺度。在这里，我们表明，浮游动物（使用声学观察）在北极峡湾的位置，自己垂直于光。一个单一的等值线（恒定光强的深度变化线，其值被设定为哲水蚤属的光行为反应的下限）。和磷虾）形成浮游动物分布的上限。垂直分布是由光跨时间尺度结构，从加深浮游动物种群在中午太阳升起在春天，到浮游动物上升到昼夜垂直迁移过程中饲料的深度。这些结果表明，浮游动物可能已经遵循觅食策略，在不断变化的光照条件下，例如海冰减少引起的光照条件下，保持视觉捕食风险大致恒定，但可能会产生能量成本，例如由于栖息地使用的改变而失去觅食机会。
The predation risk of many aquatic taxa is dominated by visually searching predators, commonly a function of ambient light. Several studies propose that changes in visual predation will become a major climate-change impact on polar marine ecosystems. The High Arctic experiences extreme seasonality in the light environment, from 24 h light to 24 h darkness, and therefore provides a natural laboratory for studying light and predation risk over diel to seasonal timescales. Here, we show that zooplankton (observed using acoustics) in an Arctic fjord position themselves vertically in relation to light. A single isolume (depth-varying line of constant light intensity, the value of which is set at the lower limit of photobehaviour reponses of Calanus spp. and krill) forms a ceiling on zooplankton distribution. The vertical distribution is structured by light across timescales, from the deepening of zooplankton populations at midday as the sun rises in spring, to the depth to which zooplankton ascend to feed during diel vertical migration. These results suggest that zooplankton might already follow a foraging strategy that will keep visual predation risk roughly constant under changing light conditions, such as those caused by the reduction of sea ice, but likely with energetic costs such as lost feeding opportunities as a result of altered habitat use.
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影响因子：
2.8
作者：
Charpentier, Corie L.;Cohen, Jonathan H.
通讯作者：
Cohen, Jonathan H.
影响因子：
2.4
作者：
Myslinski, T;Frank, T;Widder, E
通讯作者：
Widder, E
影响因子：
3.7
作者：
Banas, Neil S.;Moller, Eva F.;Eisner, Lisa B.
通讯作者：
Eisner, Lisa B.
影响因子：
2.5
作者：
Hobbs, L.;Cottier, F. R.;Berge, J.
通讯作者：
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影响因子：
13.6
作者：
Ludvigsen, Martin;Berge, Jorgen;Johnsen, Geir
通讯作者：
Johnsen, Geir