大型极地桡足类的季节性垂直迁移被重新解释为整个水柱的扩散机制。

IF 8.9 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Communications Earth & Environment Pub Date : 2025-01-01 Epub Date: 2025-06-04 DOI:10.1038/s43247-025-02389-9
Katrin Schmidt, Barbara Niehoff, Astrid Cornils, Wilhelm Hagen, Hauke Flores, Céline Heuzé, Nahid Welteke, Nadine Knϋppel, Sabrina Dorschner, Matthias Woll, Katie Jones, Giuliano Laudone, Robert G Campbell, Carin J Ashjian, Cecilia E Gelfman, Katyanne M Shoemaker, Rebecca Jenkins, Kristina Øie Kvile, Benoit Lebreton, Gaël Guillou, Clara J M Hoppe, Serdar Sakinan, Fokje L Schaafsma, Nicole Hildebrandt, Giulia Castellani, Simon T Belt, Allison A Fong, Angus Atkinson, Martin Graeve
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引用次数: 0

摘要

大型富含脂肪的桡足类动物的季节性垂直迁移通常被描述为初级生产停止时动物的大规模下降,这对中上层食物网和全球碳封存具有重要意义。这种观点忽略了地表居民个体的存在,但在这里,我们表明非移民可以构成极地移民物种种群的很大一部分。在中北冰洋,2019年11月至2020年3月,以生物量为优势的大北海Calanus hyperboreus在整个水体中分布均匀,约20%的亚成虫和成虫停留在200米以上,约41%的成虫迁移到1000-2000米。这些垂直位置与桡足类动物胆固醇含量的差异一致,这可以在更高的温度下提高组织密度。性腺发育及其后代的垂直分布表明,非迁徙雌性和迁徙雌性都对种群招募有贡献。我们将桡足动物的季节性迁徙重新解释为一种下注对冲策略,它平衡了地表附近的营养利益和深处的生存利益,从而有助于物种在气候变化下的适应能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Seasonal vertical migration of large polar copepods reinterpreted as a dispersal mechanism throughout the water column.

Seasonal vertical migration of large lipid-rich copepods is often described as a mass descent of animals when primary production ceases, with important implications for mesopelagic food webs and global carbon sequestration. This view ignores the existence of surface-resident individuals, but here we show that non-migrants can form a substantial part of the populations of polar migrant species. In the Central Arctic Ocean, the biomass-dominant Calanus hyperboreus was evenly distributed throughout the water column from November 2019 to March 2020, with ~20% of subadults and adult females remaining in the upper 200 m and ~41% migrating to 1000-2000 m. These vertical positions aligned with differences in the copepods' cholesterol content, which can enhance the tissue density at higher temperatures. Gonad development and the vertical distribution of their offspring indicate that both non-migrant and migrant females contribute to the population recruitment. We reinterpret copepod seasonal migration as a bet-hedging strategy that balances nutritional benefits near the surface with survival benefits at depth, and thereby contributes to the species' resilience under climatic change.

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来源期刊
Communications Earth & Environment
Communications Earth & Environment Earth and Planetary Sciences-General Earth and Planetary Sciences
CiteScore
8.60
自引率
2.50%
发文量
269
审稿时长
26 weeks
期刊介绍: Communications Earth & Environment is an open access journal from Nature Portfolio publishing high-quality research, reviews and commentary in all areas of the Earth, environmental and planetary sciences. Research papers published by the journal represent significant advances that bring new insight to a specialized area in Earth science, planetary science or environmental science. Communications Earth & Environment has a 2-year impact factor of 7.9 (2022 Journal Citation Reports®). Articles published in the journal in 2022 were downloaded 1,412,858 times. Median time from submission to the first editorial decision is 8 days.
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