Hypoosmotic stress in the mussel Perna perna (Linnaeus, 1758): Is ecological history a determinant for organismal responses?

Rola, Regina Coimbra; Souza, Maurício de; Sandrini, Juliana Zomer

doi:10.1016/j.ecss.2017.03.020

Cited by 16 publications

(3 citation statements)

References 37 publications

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“…This may be a result of depletion of intracellular organic osmolyte concentrations to a critical level, below which intracellular K + and Na + must be extruded in order to prevent a detrimental increase in cell volume (Podbielski et al, 2016). Increased trans-membrane ion transport activity via the Na + /K + -ATPase has also been recorded at 8 psu in mussel neuronal and gill tissue (Willmer, 1978b;Rola et al, 2017) suggesting a source of increased energy demand for osmoregulation at very low salinities. Decreased [K + ] and [Na + ] below a certain threshold have been proven to severely reduce glutamate oxidation and electron transport in bivalve mitochondria due to reduced enzymatic activities (Ballantyne and Moyes, 1987).…”

Section: Growth and Physiological Energeticsmentioning

confidence: 99%

High Calcification Costs Limit Mussel Growth at Low Salinity

et al. 2018

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In coastal temperate regions such as the Baltic Sea, calcifying bivalves dominate benthic communities playing a vital ecological role in maintaining biodiversity and nutrient recycling. At low salinities, bivalves exhibit reduced growth and calcification rates which is thought to result from physiological constraints associated with osmotic stress. Calcification demands a considerable amount of energy in calcifying molluscs and estuarine habitats provide sub-optimal conditions for calcification due to low concentrations of calcification substrates and large variations in carbonate chemistry. Therefore, we hypothesize that slow growth rates in estuarine bivalves result from increased costs of calcification, rather than costs associated with osmotic stress. To investigate this, we estimated the cost of calcification for the first time in benthic bivalve life stages and the relative energy allocation to calcification in three Mytilus populations along the Baltic salinity gradient. Our results indicate that calcification rates are significantly reduced only in 6 psu populations compared to 11 and 16 psu populations, coinciding with ca. 2-3-fold higher calcification costs at low salinity and temperature. This suggests that reduced growth of Baltic Mytilus at low salinities results from increased calcification costs rather than osmotic stress related costs. We also reveal that shell growth (both calcification and shell organic production) demands 31-60% of available assimilated energy from food, which is significantly higher than previous estimates. Energetically expensive calcification represents a major constraint on growth of mytilids in the estuarine and coastal seas where warming, acidification and desalination are predicted over the next century.

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Section: Growth and Physiological Energeticsmentioning

confidence: 99%

High Calcification Costs Limit Mussel Growth at Low Salinity

et al. 2018

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“…Mechanisms of osmotic adaptation have also been studied, through physiological, transcriptomic and proteomic, and behavioral analyses (Gosling 2003;Lockwood and Somero 2011;Tomanek et al 2012;Wang et al 2013). Mussels are generally considered osmoconformers, as are other bivalves, which adjust body fluid osmolality to that of the environment, although osmoregulatory ability has been suggested for Perna perna (Rola et al 2017). In Mytilus spp., free amino acids are thought to facilitate osmoconforming (Gosling 2003), and glycine and taurine are reported as the major osmolytes (Kube et al 2006).…”

Section: Environmental Adaptations Of Intertidal Musselsmentioning

confidence: 99%

Mussel biology: from the byssus to ecology and physiology, including microplastic ingestion and deep-sea adaptations

2021

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Mussels are a group of bivalves that includes the dominant species of shallow-sea, freshwater, and deep-sea chemosynthetic ecosystems. Mussels cling to various solid underwater surfaces using a proteinaceous thread, called the byssus, which is central to their ecology, physiology, and evolution. Mussels cluster using their byssi to form “mussel beds,” thereby increasing their biomass per unit of habitat area, and also creating habitats for other organisms. Clustered mussels actively filter feed to obtain nutrients, but also ingest pollutants and suspended particles; thus, mussels are good subjects for pollution analyses, especially for microplastic pollution. The byssus also facilitates invasiveness, allowing mussels to hitchhike on ships, and to utilize other man-made structures, including quay walls and power plant inlets, which are less attractive to native species. Physiologically, mussels have adapted to environmental stressors associated with a sessile lifestyle. Osmotic adaptation is especially important for life in intertidal zones, and taurine is a major component of that adaptation. Taurine accumulation systems have also been modified to adapt to sulfide-rich environments near deep-sea hydrothermal vents. The byssus may have also enabled access to vent environments, allowing mussels to attach to “evolutionary stepping stones” and also to vent chimneys.

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“…In addition to their ecological importance, they are also part of human diet (Marques et al , 1991). Studies with P. perna include those in ecotoxicology (Santana et al , 2018), physiology (Nogueira et al , 2017; Rola et al , 2017) and ecology (McQuaid and Lawrie, 2005; Lathlean and McQuaid, 2017).…”

Section: Methodsmentioning

confidence: 99%