Comparative physiology of young and old cohorts of bay scallop Argopecten irradians irradians (Lamarck): mortality, growth, and oxygen consumption

Bricelj, V. Monica; Epp, Jennifer; Malouf, Robert E.

doi:10.1016/0022-0981(87)90110-9

Cited by 58 publications

(1 citation statement)

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“…The sponge communities studied here thus have two of the largest recorded seasonal changes in metabolism and the range of responses in sponges is greater than that for all other phyla that have been reported to date (Figure 6). Seasonal factorial increase in metabolic rate of aquatic marine invertebrates from non-polar environments ranged from 1.3 to 5.8 [Supplementary Table 1 but with the exception of Argopecten irradians with a factorial rise of 16.7 associated with a large increase in gonad production (Bricelj et al, 1987)]. This may, on the face of it seem a surprising result, as sponges are a sessile suspension feeding group, and low activity taxa usually have poor capacities to raise metabolic rates and hence low aerobic scopes (Peck, 1998).…”

Section: Discussionmentioning

confidence: 99%

Extreme Phenotypic Plasticity in Metabolic Physiology of Antarctic Demosponges

et al. 2016

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Seasonal measurements of the metabolic physiology of four Antarctic demosponges and their associated assemblages, maintained in a flow through aquarium facility, demonstrated one of the largest differences in seasonal strategies between species and their associated sponge communities. The sponge oxygen consumption measured here exhibited both the lowest and highest seasonal changes for any Antarctic species; metabolic rates varied from a 25% decrease to a 5.8 fold increase from winter to summer, a range which was greater than all 17 Antarctic marine species (encompassing eight phyla) previously investigated and amongst the highest recorded for any marine environment. The differences in nitrogen excretion, metabolic substrate utilization and tissue composition between species were, overall, greater than seasonal changes. The largest seasonal difference in tissue composition was an increase in CHN (Carbon, Hydrogen, and Nitrogen) content in Homaxinella balfourensis, a pioneer species in ice-scour regions, which changed growth form to a twig-like morph in winter. The considerable flexibility in seasonal and metabolic physiology across the Demospongiae likely enables these species to respond to rapid environmental change such as ice-scour, reductions in sea ice cover and ice-shelf collapse in the Polar Regions, shifting the paradigm that polar sponges always live "life in the slow lane." Great phenotypic plasticity in physiology has been linked to differences in symbiotic community composition, and this is likely to be a key factor in the global success of sponges in all marine environments and their dominant role in many climax communities.

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Section: Discussionmentioning

confidence: 99%