A Dynamic Energy Budget (DEB) model to describe Laternula elliptica (King, 1832) seasonal feeding and metabolism

Agüera, Antonio; Ahn, In Young; Guillaumot, Charlène; Danis, Bruno

doi:10.1371/journal.pone.0183848

Cited by 21 publications

(12 citation statements)

References 57 publications

(137 reference statements)

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“…These discrepancies might be linked with the peculiar physiology of Antarctic benthic invertebrates. Many consumers studied here have long life spans (sometimes several decades) and low growth and metabolic rates 31–33 . Experimental estimates of isotopic turnover of tissues does not, to the best of our knowledge, exist for Antarctic benthic invertebrates.…”

Section: Discussionmentioning

confidence: 99%

Increased sea ice cover alters food web structure in East Antarctica

Michel

Danis

Dúbois

et al. 2019

Sci Rep

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In recent years, sea ice cover along coasts of East Antarctica has tended to increase. To understand ecological implications of these environmental changes, we studied benthic food web structure on the coasts of Adélie Land during an event of unusually high sea ice cover (i.e. two successive austral summers without seasonal breakup). We used integrative trophic markers (stable isotope ratios of carbon, nitrogen and sulfur) to build ecological models and explored feeding habits of macroinvertebrates. In total, 28 taxa spanning most present animal groups and functional guilds were investigated. Our results indicate that the absence of seasonal sea ice breakup deeply influenced benthic food webs. Sympagic algae dominated the diet of many key consumers, and the trophic levels of invertebrates were low, suggesting omnivore consumers did not rely much on predation and/or scavenging. Our results provide insights about how Antarctic benthic consumers, which typically live in an extremely stable environment, might adapt their feeding habits in response to sudden changes in environmental conditions and trophic resource availability. They also show that local and/or global trends of sea ice increase in Antarctica have the potential to cause drastic changes in food web structure, and therefore to impact benthic communities.

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Section: Discussionmentioning

confidence: 99%

Increased sea ice cover alters food web structure in East Antarctica

Michel

Danis

Dúbois

et al. 2019

Sci Rep

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“…It did not, however, reflect the very large interannual reproductive output measured in this species by Grange et al (2007). A similar approach was used to produce a DEB for the large infaunal bivalve Laternula elliptica, again based on literature, data collected at a range of sites and over multiple years by Aguera et al (2017). They described L. elliptica as having a 'metabolism specifically adapted to low temperatures, with a low maintenance cost and a high capacity to uptake and mobilise energy, providing this organism with a level of energetic performance matching that of related species from temperate regions'.…”

Section: Energy Use Oxygen Consumption and Metabolic Ratementioning

confidence: 99%

“…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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“…One of the main reasons for the growing popularity of Dynamic Energy Budget theory in the ecological literature is its ability to model organismal responses to a variable environment on a mechanistic basis. Its utility has been extensively proven in comparisons of systems where conditions differ across latitudes, or across eco-regions 49 , 50 . However, implementing DEB models for populations that experience regular, strong fluctuations in abiotic factors has received considerably less attention.…”

Section: Discussionmentioning

confidence: 99%

Applicability of Dynamic Energy Budget (DEB) models across steep environmental gradients

Monaco

McQuaid

2018

Sci Rep

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Robust ecological forecasting requires accurate predictions of physiological responses to environmental drivers. Energy budget models facilitate this by mechanistically linking biology to abiotic drivers, but are usually ground-truthed under relatively stable physical conditions, omitting temporal/spatial environmental variability. Dynamic Energy Budget (DEB) theory is a powerful framework capable of linking individual fitness to environmental drivers and we tested its ability to accommodate variability by examining model predictions across the rocky shore, a steep ecotone characterized by wide fluctuations in temperature and food availability. We parameterized DEB models for co-existing mid/high-shore (Mytilus galloprovincialis) and mid/low-shore (Perna perna) mussels on the south coast of South Africa. First, we assumed permanently submerged conditions, and then incorporated metabolic depression under low tide conditions, using detailed data of tidal cycles, body temperature and variability in food over 12 months at three sites. Models provided good estimates of shell length for both species across the shore, but predictions of gonadosomatic index were consistently lower than observed. Model disagreement could reflect the effects of details of biology and/or difficulties in capturing environmental variability, emphasising the need to incorporate both. Our approach provides guidelines for incorporating environmental variability and long-term change into mechanistic models to improve ecological predictions.

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A Dynamic Energy Budget (DEB) model to describe Laternula elliptica (King, 1832) seasonal feeding and metabolism

Cited by 21 publications

References 57 publications

Increased sea ice cover alters food web structure in East Antarctica

Increased sea ice cover alters food web structure in East Antarctica

Oceanography and Marine Biology

Applicability of Dynamic Energy Budget (DEB) models across steep environmental gradients

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