The impact of seasonal regulation of metabolism on the life history of Antarctic krill

被引：10

作者：

Bahlburg, Dominik ^{[1
,2
]}

Meyer, Bettina ^{[3
,4
,5
]}

Berger, Uta ^{[1
]}

机构：

[1] Tech Univ Dresden, Forest Biometr & Forest Syst Anal, Pienner Str 8, D-01737 Tharandt, Germany

[2] Helmholtz Ctr Environm Res Leipzig Halle, Dept Ecol Modelling, Permoserstr 15, D-04318 Leipzig, Germany

[3] Alfred Wegener Inst, Helmholtz Ctr Polar & Marine Res, Sect Polar Biol Oceanog, Handelshafen 12, D-27570 Bremerhaven, Germany

[4] Carl von Ossietzky Univ Oldenburg, Inst Chem & Biol Marine Environm ICBM, Carl von Ossietzky Str 9-11, D-26111 Oldenburg, Germany

[5] Helmholtz Inst Marine Funct Biodivers HIFMB, Ammerlander Heerstr 231, D-26111 Oldenburg, Germany

来源：

ECOLOGICAL MODELLING | 2021年 / 442卷

关键词：

DEB theory; Euphausia superba; Metabolic regulation; Temperature; Photoperiod; DYNAMIC ENERGY BUDGET; EUPHAUSIA-SUPERBA; SOUTHERN-OCEAN; GENERIC MODEL; ICE-ZONE; TEMPERATURE; GROWTH; SHRINKAGE; REGION; WINTER;

D O I：

10.1016/j.ecolmodel.2021.109427

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Antarctic krill up- and down-regulate their metabolism as a strategy to cope with the strong seasonal environmental fluctuations in the Southern Ocean. In this study, we investigate the impact of this light- and temperature dependent metabolic regulation on growth, reproduction and winter survival of krill. Therefore, we advance a bioenergetic growth model of krill by adding a data-derived scaling function of krill activity. With SERBIK (SEasonally Regulated BIoenergetic Krill growth model), we conduct a numerical experiment which tests the impact of such scaling on krill life history under two different winter food conditions: In the first scenario, we simulate life history of krill when winter food availability is low; in the second scenario, winter food availability is increased within realistic ranges. The results demonstrate that the scaling of metabolism is especially important during low food winters. Reducing metabolism during winter permits individuals to grow to larger body length, reproduce successfully and release a greater number of eggs. It further significantly reduces within-year size fluctuations caused by starvation during months with low food availability. Finally, SERBIK can be used in future spatial modelling studies which include movement of krill along latitudinal gradients and thus spatiotemporal gradients in light- and temperature.

引用

页数：10

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