Individual-based modelling of Calanus sinicus population dynamics in the Yellow Sea

Wang, Luning; Wei, Hao; Batchelder, Harold P.

doi:10.3354/meps10725

Cited by 7 publications

(3 citation statements)

References 69 publications

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“…For a higher resolution and dynamic picture, we can use approach (3). There is a large body of work modelling diapausing copepods (Fiksen, ; Hairston & Munns, ; Huntley, Zhou, & Lopez, ; Maps, Plourde, & Zakardjian, ; Maps, Record, & Pershing, ; Miller, Lynch, Carlotti, Gentleman, & Lewis, ; Pierson, Batchelder, Saumweber, Leising, & Runge, ; Speirs et al., ; Tittensor, DeYoung, & Tang, ; Varpe, Jørgensen, Tarling, & Fiksen, ; Wang, Wei, & Batchelder, ; Wilson, Banas, Heath, & Speirs, ; Zakardjian et al., ), incorporating some aspects of the trait‐based perspective (Ji, ; Maps, Pershing, & Record, ; Maps, Runge, et al., ; Record, Pershing, & Maps, 2013a). Most modelling studies focus on a single region and just one species.…”

Section: Introductionmentioning

confidence: 99%

Copepod diapause and the biogeography of the marine lipidscape

Record

Maps

et al. 2018

Journal of Biogeography

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Aim One of the primary characteristics that determines the structure and function of marine food webs is the utilization and prominence of energy‐rich lipids. The biogeographical pattern of lipids throughout the ocean delineates the marine “lipidscape,” which supports lipid‐rich fish, mammal, and seabird communities. While the importance of lipids is well appreciated, there are no synoptic measurements or biogeographical estimates of the marine lipidscape. Productive lipid‐rich food webs in the pelagic ocean depend on the critical diapause stage of large pelagic copepods, which integrate lipid production from phytoplankton, concentrating it in space and time, and making it available to upper trophic levels as particularly energy‐rich wax esters. As an important first step towards mapping the marine lipidscape, we compared four different modelling approaches of copepodid diapause, each representing different underlying hypotheses, and evaluated them against global datasets. Location Global Ocean. Taxon Copepoda. Methods Through a series of global model runs and data comparisons, we demonstrated the potential for regional studies to be extended to estimate global biogeographical patterns of diapause. We compared four modelling approaches each designed from a different perspective: life history, physiology, trait‐based community ecology, and empirical relationships. We compared the resulting biogeographical patterns and evaluated the model results against global measurements of copepodid diapause. Results Models were able to resolve more than just the latitudinal pattern of diapause (i.e. increased diapause prevalence near the poles), but to also pick up a diversity of regions where diapause occurs, such as coastal upwelling zones and seasonal seas. The life history model provided the best match to global observations. The predicted global biogeographical patterns, combined with carbon flux estimates, suggested a lower bound of 0.031–0.25 Pg C yr−1 of downward flux associated with copepodid diapause. Main conclusions Results indicated a promising path forward for representing a detailed biogeography of the marine lipidscape and its associated carbon flux in global ecosystem and climate models. While complex models may offer advantages in terms of reproducing details of community structure, simpler theoretically based models appeared to best reproduce broad‐scale biogeographical patterns and showed the best correlation with observed biogeographical patterns.

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Section: Introductionmentioning

confidence: 99%

Copepod diapause and the biogeography of the marine lipidscape

Record

Maps

et al. 2018

Journal of Biogeography

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“…In our model, we defined growth explicitly as the carbon budget between ingested and assimilated material minus the body mass lost to metabolic maintenance, i.e., assimilated ingestion minus respiration. This simple formulation is a robust approximation of growth for mesozooplankton and krill (Hofmann and Lascara ; Wang et al ):

G = A I - R ((), mg normalC h^{- 1})

where A was the assimilation efficiency coefficient (unitless), I the individual's ingestion rate in mg C h −1 , and R the individual's respiration rate in mg C h −1 .…”

Section: Methodsmentioning

confidence: 99%

Section: Growthmentioning

confidence: 99%

Individual‐based modeling explains the contrasted seasonality in size, growth, and reproduction of the sympatric Arctic (Thysanoessa raschii) and Nordic krill (Meganyctiphanes norvegica) in the St. Lawrence Estuary, eastern Canada

Benkort

Plourde

Winkler

et al. 2018

Limnology & Oceanography

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The Nordic krill Meganyctiphanes norvegica and Arctic krill Thysanoessa raschii both dominate the krill community within the Estuary and Gulf of St. Lawrence system where they are central forage species for its pelagic ecosystem. We developed a species‐specific physiological individual based model that implements the critical physiological processes of growth, molting, and reproduction of female adults as responses to environmental forcing. Key innovations of our approach were the decoupling between the molting schedule and growth, as well as considering two distinct sources of prey (phytoplankton and mesozooplankton). Our simulation results revealed that the details of the feeding process were critical for an accurate representation of the production dynamics of adult individuals from both species. Their specific feeding preferences on phytoplankton and mesozooplankton resulted in distinct species‐specific phenological patterns that reproduced observations. The present study highlights the importance of detailed knowledge of diet and feeding behavior of krill species to improve our understanding of population responses in a rapidly changing environment.

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