Parameter Estimations of Dynamic Energy Budget (DEB) Model over the Life History of a Key Antarctic Species: The Antarctic Sea Star Odontaster validus Koehler, 1906

Agüera, Antonio; Collard, Marie; Jossart, Quentin; Moreau, Camille; Danis, Bruno

doi:10.1371/journal.pone.0140078

Cited by 25 publications

(23 citation statements)

References 54 publications

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“…Thus, the potential invasive success of A. amurensis may also be limited by competition from resident O. validus populations, at least in the short term. Although O. validus may have some sensitivity to warming (Agüera et al ., ), on a comparative basis, this seastar is one of the most thermotolerant of Antarctic marine species studied to date (Peck et al ., ).…”

Section: Discussionmentioning

confidence: 99%

From pole to pole: the potential for the Arctic seastarAsterias amurensisto invade a warming Southern Ocean

Byrne

Gall

Wolfe

et al. 2016

Global Change Biology

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Due to climatic warming, Asterias amurensis, a keystone boreal predatory seastar that has established extensive invasive populations in southern Australia, is a potential high-risk invader of the sub-Antarctic and Antarctic. To assess the potential range expansion of A. amurensis to the Southern Ocean as it warms, we investigated the bioclimatic envelope of the adult and larval life stages. We analysed the distribution of adult A. amurensis with respect to present-day and future climate scenarios using habitat temperature data to construct species distribution models (SDMs). To integrate the physiological response of the dispersive phase, we determined the thermal envelope of larval development to assess their performance in present-day and future thermal regimes and the potential for success of A. amurensis in poleward latitudes. The SDM indicated that the thermal 'niche' of the adult stage correlates with a 0-17 °C and 1-22.5 °C range, in winter and summer, respectively. As the ocean warms, the range of A. amurensis in Australia will contract, while more southern latitudes will have conditions favourable for range expansion. Successful fertilization occurred from 3 to 23.8 °C. By day 12, development to the early larval stage was successful from 5.5 to 18 °C. Although embryos were able to reach the blastula stage at 2 °C, they had arrested development and high mortality. The optimal thermal range for survival of pelagic stages was 3.5-19.2 °C with a lower and upper critical limit of 2.6 and 20.3 °C, respectively. Our data predict that A. amurensis faces demise in its current invasive range while more favourable conditions at higher latitudes would facilitate invasion of both larval and adult stages to the Southern Ocean. Our results show that vigilance is needed to reduce the risk that this ecologically important Arctic carnivore may invade the Southern Ocean and Antarctica.

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Section: Discussionmentioning

confidence: 99%

From pole to pole: the potential for the Arctic seastarAsterias amurensisto invade a warming Southern Ocean

Byrne

Gall

Wolfe

et al. 2016

Global Change Biology

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“…; Agüera et al . ) and, consequently, the dynamics of internal state variables. In ectothermic organisms, this relationship is more evident (Pecquerie et al .…”

Section: Main Insights From Our Behavioural‐bioenergetics Model and Pmentioning

confidence: 99%

A mechanistic theory of personality‐dependent movement behaviour based on dynamic energy budgets

et al. 2018

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Consistent between‐individual differences in movement are widely recognised across taxa. In addition, foraging plasticity at the within‐individual level suggests a behavioural dependency on the internal energy demand. Because behaviour co‐varies with fast‐slow life history (LH) strategies in an adaptive context, as theoretically predicted by the pace‐of‐life syndrome hypothesis, mass/energy fluxes should link behaviour and its plasticity with physiology at both between‐ and within‐individual levels. However, a mechanistic framework driving these links in a fluctuating ecological context is lacking. Focusing on home range behaviour, we propose a novel behavioural‐bioenergetics theoretical model to address such complexities at the individual level based on energy balance. We propose explicit mechanistic links between behaviour, physiology/metabolism and LH by merging two well‐founded theories, the movement ecology paradigm and the dynamic energetic budget theory. Overall, our behavioural‐bioenergetics model integrates the mechanisms explaining how (1) behavioural between‐ and within‐individual variabilities connect with internal state variable dynamics, (2) physiology and behaviour are explicitly interconnected by mass/energy fluxes, and (3) different LHs may arise from both behavioural and physiological variabilities in a given ecological context. Our novel theoretical model reveals encouraging opportunities for empiricists and theoreticians to delve into the eco‐evolutionary processes that favour or hinder the development of between‐individual differences in behaviour and the evolution of personality‐dependent movement syndromes.

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“…Energy budget theory has developed over the last 20 years into the field of dynamical energy budgeting where the static 'snapshot' of most previous energy budget studies that calculated the budget for a set moment in time was extended to follow the changes of the energy fluxes through an organism over time and in its full formulation over the full life cycle of that organism (Kooijman 2000). This approach has recently been applied to the Antarctic starfish Odontaster validus (Aguera et al 2015) and infaunal bivalve mollusc Laternula elliptica (Aguera et al 2017), as described earlier. The dynamic energy budget approach has distinct advantages in that it is mechanistically based and allows analyses of seasonal and ontogenetic changes in energy use, can identify critical times when energy may be limiting, and can interpolate from stage to stage and time to time using a set of well-developed equations.…”

Section: Energy Use Oxygen Consumption and Metabolic Ratementioning

confidence: 99%

Oceanography and Marine Biology

Hawkins¹,

Evans²,

Dale³

et al. 2018

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Animals living in the Southern Ocean have evolved in a singular environment. It shares many of its attributes with the high Arctic, namely low, stable temperatures, the pervading effect of ice in its many forms and extreme seasonality of light and phytobiont productivity. Antarctica is, however, the most isolated continent on Earth and is the only one that lacks a continental shelf connection with another continent. This isolation, along with the many millions of years that these conditions have existed, has produced a fauna that is both diverse, with around 17,000 marine invertebrate species living there, and has the highest proportions of endemic species of any continent. The reasons for this are discussed. The isolation, history and unusual environmental conditions have resulted in the fauna producing a range and scale of adaptations to low temperature and seasonality that are unique. The best known such adaptations include channichthyid icefish that lack haemoglobin and transport oxygen around their bodies only in solution, or the absence, in some species, of what was only 20 years ago termed the universal heat shock response. Other adaptations include large size in some groups, a tendency to produce larger eggs than species at lower latitudes and very long gametogenic cycles, with egg development (vitellogenesis) taking 18-24 months in some species. The rates at which some cellular and physiological processes are conducted appear adapted to, or at least partially compensated for, low temperature such as microtubule assembly in cells, whereas other processes such as locomotion and metabolic rate are not compensated, and whole-animal growth, embryonic development, and limb regeneration in echinoderms proceed at rates even slower than would be predicted by the normal rules governing the effect of temperature on biological processes. This review describes the current state of knowledge on the biodiversity of the Southern Ocean fauna and on the majority of known ecophysiological adaptations of coldblooded marine species to Antarctic conditions. It further evaluates the impacts these adaptations have on capacities to resist, or respond to change in the environment, where resistance to raised temperatures seems poor, whereas exposure to acidified conditions to end-century levels has comparatively little impact. Zone Description Area (km 2) Length (km) Southern Ocean Total area (km 2)

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Parameter Estimations of Dynamic Energy Budget (DEB) Model over the Life History of a Key Antarctic Species: The Antarctic Sea Star Odontaster validus Koehler, 1906

Cited by 25 publications

References 54 publications

From pole to pole: the potential for the Arctic seastarAsterias amurensisto invade a warming Southern Ocean

From pole to pole: the potential for the Arctic seastarAsterias amurensisto invade a warming Southern Ocean

A mechanistic theory of personality‐dependent movement behaviour based on dynamic energy budgets

Oceanography and Marine Biology

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