Marine sponges in the once and future ocean

Mills, Daniel B.; Sperling, Erik A.

doi:10.1111/gcb.16053

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…The present study further supports previous hypotheses that sponges could be favored in future low-oxygen environments [ 69 , 72 , 93 ]. The potential to grow independent of reduced oxygen levels, at least to a certain point, may enable sponge populations to occupy habitats where declining oxygen has a significant impact on other sessile, solitary (i.e.…”

Section: Discussionsupporting

confidence: 92%

“…These were long-term experiments (several days), but if such behaviour also occurred in our short-term incubations, then the asymptotic pattern of oxygen uptake could reflect restructuring of the aquiferous system at low oxygen levels. Such modifications in response to hypoxia have previously been observed in other demosponges, such as Polymastia crocea, who presumably increase their surface-to-volume ratio for maximizing the diffusive oxygen uptake [69,72].…”

Section: Nature Of Oxygen Uptake Kineticssupporting

confidence: 65%

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Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

Kumala,

Thomsen,

Canfield

2023

BMC Ecol Evo

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Background The aquiferous system in sponges represents one of the simplest circulatory systems used by animals for the internal uptake and distribution of oxygen and metabolic substrates. Its modular organization enables sponges to metabolically scale with size differently than animals with an internal circulatory system. In this case, metabolic rate is typically limited by surface to volume constraints to maintain an efficient supply of oxygen and food. Here, we consider the linkeage between oxygen concentration, the respiration rates of sponges and sponge size. Results We explored respiration kinetics for individuals of the demosponge Halichondria panicea with varying numbers of aquiferous modules (nmodules = 1–102). From this work we establish relationships between the sponge size, module number, maximum respiration rate (Rmax) and the half-saturation constant, Km, which is the oxygen concentration producing half of the maximum respiration rate, Rmax. We found that the nmodules in H. panicea scales consistently with sponge volume (Vsp) and that Rmax increased with sponge size with a proportionality > 1. Conversly, we found a lack of correlation between Km and sponge body size suggesting that oxygen concentration does not control the size of sponges. Conclusions The present study reveals that the addition of aquiferous modules (with a mean volume of 1.59 ± 0.22 mL) enables H. panicea in particular, and likely demosponges in general, to grow far beyond constraints limiting the size of their component modules and independent of ambient oxygen levels.

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Section: Discussionsupporting

confidence: 92%

Section: Nature Of Oxygen Uptake Kineticssupporting

confidence: 65%

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

Kumala,

Thomsen,

Canfield

2023

BMC Ecol Evo

View full text Add to dashboard Cite

show abstract

“…The present study further supports previous hypotheses that sponges could be favored in future lowoxygen environments [69, 72,93]. The potential to grow independent of reduced oxygen levels, at least to a certain point, may enable sponge populations to occupy habitats where declining oxygen has a signi cant impact on other sessile, solitary (i.e.…”

Section: Implications For Modern Hypoxia and Animal Evolutionsupporting

confidence: 90%

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

Kumala

Thomsen

Canfield

2023

Preprint

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Background: The aquiferous system in sponges represents one of the simplest circulatory systems used by animals for the internal uptake and distribution of oxygen and metabolic substrates. Its modular organization enables sponges to metabolically scale with size differently than animals with an internal circulatory system. In this case, metabolic rate is typically limited by surface to volume constraints to maintain an efficient supply of oxygen and food. Here, we consider the linkeage between oxygen concentration, the respiration rates of sponges and sponge size. Results: We explored respiration kinetics for individuals of the demosponge Halichondria panicea with varying numbers of aquiferous modules (nmodule = 1-102). From this work we establish relationships between the sponge size, module number, maximum respiration rate (Rmax) and the half-saturation constant, Km, which is the oxygen concentration producing half of the maximum respiration rate, Rmax. We found that the nmodule in H. panicea scales consistently with sponge volume (Vsp) and that Rmax increased with sponge size with a proportionality > 1. Conversly, we found a lack of correlation between Km and sponge body size suggesting that oxygen concentration does not control the size of sponges. Conclusions: The present study reveals that the addition of aquiferous modules (with a mean volume of 1.59 ± 0.22 mL) enables H. panicea in particular, and likely demosponges in general, to grow far beyond constraints limiting the size of their component modules and independent of ambient oxygen levels.

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Marine sponges in the once and future ocean

Abstract: Animal life began under hypoxia-low-oxygen (O 2 ) conditions that are currently expanding throughout the global ocean. The hypoxia tolerance of marine animals, therefore, concerns both the deep history and near future of animal life. Sponges (Phylum Porifera

Cited by 2 publications

References 12 publications

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

Respiration kinetics and allometric scaling in the demosponge Halichondria panicea

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