Acclimatization to intertidal conditions modifies the physiological response to prolonged air exposure inMytilus edulis

Demers, Antoine; Guderley, Helga

doi:10.1007/bf00699225

Cited by 31 publications

(17 citation statements)

References 15 publications

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“…But shell valve adduction (preventing influxes) and haemolymph acidosis (promoting toxic NH3 effluxes) may not be the only means by which Mytilus edulis resists the stresses of high ambient ammonia. The species is able to respire anaerobically and this favours direct ammonia fixation which leads to the synthesis of some amino acids (Zurburg & Zwaan 1981, Demers & Guderley 1994, thereby preventing a high ammonia accumulation. Here, measurable increases in haemolymph NPS levels were found in all groups exposed to ammoniaenriched media (Fig.…”

Section: Discussionmentioning

confidence: 99%

Fluxes of haemolymph ammonia and free amino acids in Mytilus edulis exposed to ammonia

Sadok¹,

Uglow²,

Haswell³

1995

Mar. Ecol. Prog. Ser.

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Survival, weight-specific ammonia fluxes, blood ammonia levels and pH values were measured in individual mussels Mytilus edulls (L.) (n = 6 in each group) sampled after various acute exposures (max. 2 h) in normal or ammonia-enriched seawater Ammonia influxes occurred when external ammonia was 2100 pm01 I-' when, within 5 min, mean blood ammonia levels increased significantly by an amount directly proportional to the medium ammonia concentration. Blood pH showed an initial alkalosls followed by a slow acidosis. Blood ninhydnn-positive substance (NPS) levels showed a less rapid medium-NH4 concentration-dependent elevation and only the 100 inmol l-'-treated mussels showed a signlf~cant increase in blood NPS after 5 min exposure. Wlth~n the 2 h test period, no mortalities occurred in any group, though 50% of the 100 mm01 l-'-treated group subsequently died after 6 h exposure. Apart from those in the most concentrated test medium, all mussels were seen to use apparently normal pumping behaviour, and it was concluded that M. edulis is an ammonia-tolerant species, capable of tolerating very high blood ammonia levels for extended periods of time. The toxic effect may be related more to the rate at which ammonia influx occurs, with the attendant level of disruption to the regulation of blood NPS levels, rather than to the actual blood ammonia concentration attained.

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Section: Discussionmentioning

confidence: 99%

Fluxes of haemolymph ammonia and free amino acids in Mytilus edulis exposed to ammonia

Sadok¹,

Uglow²,

Haswell³

1995

Mar. Ecol. Prog. Ser.

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“…The rocky intertidal: a model environment for stress response Both Mytilus trossulus and M. galloprovincialis are known to inhabit areas along the rocky intertidal region (Schneider, 2008;Lockwood et al, 2015). The rocky intertidal habitat is one of the most stressful habitats in nature (Guderly et al, 1994;Werner et al, 1983). This is due to the fact that the intertidal is characterized by many different types of abiotic factors such as tidal cycles, diel cycles, solar heating and wave action (Lockwood et al, 2015).…”

Section: In Order To Determine What Makes An Invasive Species Such Amentioning

confidence: 99%

“…Once the mussel has closed its shell, the mussel utilizes two strategies. The first strategy is depression of metabolic rate during valve closure in air (Demers and Guderly, 1994;Fields et al, 2014;Grieshaber et al, 1994). This is done in order to compensate for the decreased rate of oxygen consumption, as this metabolic depression can decrease the metabolic rate up to 5% of its normal rate (Demers and Guderly, 1994;Fields et al, 2014;Babarro et al, 2007).…”

Section: Strategies Utilized By Mussels To Tolerate Aerial-immersion mentioning

confidence: 99%

“…The first strategy is depression of metabolic rate during valve closure in air (Demers and Guderly, 1994;Fields et al, 2014;Grieshaber et al, 1994). This is done in order to compensate for the decreased rate of oxygen consumption, as this metabolic depression can decrease the metabolic rate up to 5% of its normal rate (Demers and Guderly, 1994;Fields et al, 2014;Babarro et al, 2007). Blue mussels, specifically M. edulis, decrease metabolic rate by decreasing the activity of key glycolytic enzymes, such as phosphofructokinase, by decreasing the activity of the enzyme that activates phosphofructokinase, fructose-2,6biphosphate (Storey, 1987).…”

Section: Strategies Utilized By Mussels To Tolerate Aerial-immersion mentioning

confidence: 99%

“…Blue mussels, specifically M. edulis, decrease metabolic rate by decreasing the activity of key glycolytic enzymes, such as phosphofructokinase, by decreasing the activity of the enzyme that activates phosphofructokinase, fructose-2,6biphosphate (Storey, 1987). In addition, M. edulis will also phosphorylate phosphofructokinase and pyruvate kinase, another key glycolytic enzyme, in order to produce less efficient forms of these enzymes and decrease the rate of glycolysis (Demers and Guderly, 1994;Storey, 1987). The second strategy utilized by marine mussels involves the switch to anaerobic metabolism, which leads to the accumulation of opines, such as succinate, propionate and other certain volatile fatty acids (Demers and Guderly, 1994;Müller et al, 2012;Fields et al, 2014).…”

Section: Strategies Utilized By Mussels To Tolerate Aerial-immersion mentioning

confidence: 99%

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The Proteomic Rresponses of Gill Tissue in Tidally and Subtidally-Acclimated Mussel Congeners (Mytilus trossulus and Mytilus galloprovincialis) to Acute Aerial-Emersion Hypoxia

Campbell¹

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Understanding species-specific physiological tolerances to environmental extremes is key in determining the factors that contribute to regulating species distribution. This understanding will aid in determining which species will manage to thrive in a changing global climate. According to the IPCC (2013) it is expected that, in the coming years, many different types of abiotic factors will change as a result of global climate change. The intertidal habitat is a model habitat for studying environmental extremes as it is located at the interface between the marine and terrestrial environments, making it one of the most stressful marine habitats. It is characterized by a 24 hr light: dark cycle and a 12.4 tidal ebb and flow that exposes animals inhabiting this habitat to a wide array of aerial-associated stressors such as changes in temperature, aerial exposure, low oxygen or hypoxic conditions and desiccation stress. Sessile organisms such as marine mussels of the genus Mytilus, are an ideal study species for studying physiological tolerance at the environmental extremes of the intertidal habitat. In particular, M. trossulus and M. galloprovincialis are an excellent study system for examining physiological tolerance at environmental extremes due to the recent change in biogeographic range of both species. M. galloprovincialis, a native of the Mediterranean, v has been taking over the coast of California and has been displacing the heat sensitive native M. trossulus. The effects of salinity stress and heat stress on the physiologies of these species have been investigated by Braby and Somero (2006a and 2006b), Tomanek and Zuzow (2010) and Tomanek et al. (2012). The results of these studies indicate that the invasive M. galloprovincialis is more heat tolerant but is sensitive to hyposalinity while the reverse is true for the native M. trossulus. The next logical environmental stress to study is low tide or aerial-emersion as both species can be found both tidally and subtidally. According to Grieshaber et al. (1994) and Müller et al. (2012) Mytilus edulis mussels have mechanisms for mitigating aerial-emersion hypoxia; however, very few studies have been performed using the study system of M. trossulus and M. galloprovincialis in regard to aerial-emersion hypoxia. This study aimed to observe the responses of both M. trossulus and M. galloprovincialis to aerial-emersion hypoxic stress or low tide. The study also looked to see if the recent habitat history (tidal or subtidal) can play a role in the response of the mussels to hypoxia. The results of the experiment indicate that the invasive M. galloprovincialis may be less sensitive to hypoxic stress when compared to the native M. trossulus. This difference in sensitivity may be due to the difference in mechanisms of energy metabolism proteins and proteostasis proteins used to mitigate the effects of hypoxic stress. Moreover, tidal acclimation appears to better prepare the mussels for subsequent aerial exposure in both species, possibly based upon the principles of stres...

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Biomarkers in Invertebrates

Lagadic¹

1999

Biomarkers: A Pragmatic Basis for Remediation of Severe Pollution in Eastern Europe

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Acclimatization to intertidal conditions modifies the physiological response to prolonged air exposure inMytilus edulis

Cited by 31 publications

References 15 publications

Fluxes of haemolymph ammonia and free amino acids in Mytilus edulis exposed to ammonia

Fluxes of haemolymph ammonia and free amino acids in Mytilus edulis exposed to ammonia

The Proteomic Rresponses of Gill Tissue in Tidally and Subtidally-Acclimated Mussel Congeners (Mytilus trossulus and Mytilus galloprovincialis) to Acute Aerial-Emersion Hypoxia

Biomarkers in Invertebrates

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