Annual variation in condition, respiration and remineralisation ofMytilus edulis L. in the Sound, Denmark

Schlüter, Louise; Josefsen, S. B.

doi:10.1007/bf02366255

Cited by 14 publications

(5 citation statements)

References 37 publications

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“…Rates were found well in the range of previously published data for M. edulis (Okumus and Stirling, 1994;Schlüter and Johansen, 1994;Sukhotin and Pörtner, 2001). Acute ], D) of control (390 μatm) and CO 2 exposed (750 and 1120 μatm) blue mussels, M. edulis during acute warming (3°C/night).…”

Section: Thermal Limits Under Normocapniasupporting

confidence: 88%

Impact of ocean acidification on thermal tolerance and acid–base regulation of Mytilus edulis (L.) from the North Sea

Zittier

Bock

Lannig

et al. 2015

Journal of Experimental Marine Biology and Ecology

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Anthropogenic climate change confronts marine organisms with rapid trends of concomitant warming and CO 2 induced ocean acidification. The survival and distribution of species partly depend on their ability to exploit their physiological plasticity during acclimatization. Therefore, in laboratory studies the effects of simulated future ocean acidification on thermal tolerance, energy metabolism and acid-base regulation capacity of the North Sea population of the blue mussel Mytilus edulis were examined. Following one month of pre-acclimation to 10°C and control CO 2 levels, mussels were exposed for two weeks to control and projected oceanic CO 2 levels (390, 750 and 1120 μatm) before being subjected to a stepwise warming protocol between 10°C and 31°C (+3°C each night). Oxygen consumption and heart rates, anaerobic metabolite levels and haemolymph acidbase status were determined at each temperature. CO 2 exposure left oxygen consumption rate unchanged at acclimation temperature but caused a somewhat stronger increase during acute warming and thus mildly higher Q 10 -values than seen in controls. Interestingly, the thermally induced limitation of oxygen consumption rate set in earlier in normocapnic than in hypercapnic (1120 μatm CO 2 ) mussels (25.2°C vs. 28.8°C), likely due to an onset of metabolic depression in the control group following warming. However, the temperature induced increase in heart rate became limited above 25°C in both groups indicating an unchanged pejus temperature regardless of CO 2 treatment. An upper critical temperature was reached above 28°C in both treatments indicated by the accumulation of anaerobic metabolites in the mantle tissue, paralleled by a strong increase in haemolymph PCO 2 at 31°C. Ocean acidification caused a decrease in haemolymph pH. The extracellular acidosis remained largely uncompensated despite some bicarbonate accumulation. In all treatments animals developed a progressive warming-induced extracellular acidosis. A stronger pH drop at around 25°C was followed by stagnating heart rates. However, normocapnic mussels enhanced bicarbonate accumulation at the critical limit, a strategy no longer available to hypercapnic mussels. In conclusion, CO 2 has small effects on the response patterns of mussels to warming, leaving thermal thresholds largely unaffected. High resilience of adult North Sea mussels to future ocean acidification indicates that sensitivity to thermal stress is more relevant in shaping the response to future climate change.

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Section: Thermal Limits Under Normocapniasupporting

confidence: 88%

Impact of ocean acidification on thermal tolerance and acid–base regulation of Mytilus edulis (L.) from the North Sea

Zittier

Bock

Lannig

et al. 2015

Journal of Experimental Marine Biology and Ecology

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“…In intertidal zones, major studies on the release of nutnents by dense populations of bivalves have been based on 1 (Dame et al 1984, Dame & Dankers 1988 or relatively few sampling occasions (Pnns , Smaal & Zurburg 1997. Other studies have investigated the year-round seasonal variation of animal nutrient excretion through in situ chamber incubations (Yamada & Kayama 1987, Boucher & Boucher-Rodoni 1988, Schlüter & Josefsen 1994. However, experimental animals were used in short period incubations and no or little information on the actual animal composition and biomass in the specific study area was given.…”

Section: Introductionmentioning

confidence: 99%

“…Extended information on the temporal change of natural populations of intertidal macrozoobenthos is often neglected, but this might be fundamental in assessing the role of macrozoobenthos in the year-round processes of nutrient regeneration within the intertidal Zone. Strong temporal change of animal standing stock may possibly surpass the effect and importance of variation in excretion rate due to animal physiological factors, such as seasonal cycles of gametogenesis, Storage and utilization of body reserves, and water temperature (Bayne & Scullard 1977, Schlüter & Josefsen 1994). …”

Section: Introductionmentioning

confidence: 99%

Temporal scaling and relevance of bivalve nutrient excretion on a tidal flat of the Seto Inland Sea, Japan

Magni¹,

Montani²,

Takada³

et al. 2000

Mar. Ecol. Prog. Ser.

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Using an indirect and integrated approach, we quantified the magnitude and temporal variabiiity of the contribution of macrozoobenthos to the upward flux of inorganic nitrogen and phosphorus on a sandy tidal flat of the Seto inland Sea, Japan. From Apnl1994 to April 1996, we conducted monthly field surveys on the abundance and faunal composition of the macrozoobenthic communities inhabiting the lower part of the intertidal zone. Subsequently, we carried out 24 h day/night laboratory experiments on the nutrient excretion rate by various size-classes of the dominant species. We then obtained the animal nutrient excretion over a 2 yr period, muitiplying the species-specific excretion rates by the actual animal biomass found on the tidal flat. Additionaliy, for ali different seasons, we calcuiated the upward diffusive flux from the sediments from the vertical profiies of nutrient concentrations in the porewater. On the flat, the bivalves Ruditapes phihppinarum (Veneridae) and Musculista senhousia (Myhhdae) were dominant, making up 86 I 5.6 % when the total biomass exceeded 100 g DW (dry weight) m-'. From our laboratory experiments, the mean (day and night) nutrient excretion rates at 20 to 22OC by the 2 bivalve species were 18.9 p n o l NH4+-N g-' DW h-I, 4.8 pnol (NO3-+ NO2-)-N g-' DW h-' and 3.3 pmol P043--P g-' DW h-I. ln addition, NH4+-N excretion by R. phiiippinarum, but not that by M. senhousia, was significantly higher during the day than during the night. This occurred while the food (Thalassiosua sp.) offered in spikes was rapidly taken up irrespective of the concentration (within a field relevant spring-summer range of 10 to 60 pg T' chl a) andin day/night treatments. The release of nitrogen (N) and the release of phosphorus (P) were highly correlated with each other, for both R. philippinarum and M. senhousia, with a N/P ratio of 7.8 ? 3.0 and 9.9 * 3.5, respectively. In the field, the bivalve excretion rates of nutrients were calculated to be up to 35.2 mmol NH4+-N m-' d-I, 8.8 mrnol (NO3-+ NO2-)-N m-' d-' and 5.8 mmol P O~~--P m-' d-'. These values rank in the upper range of nutrient excretion by intertidal macrozoobenthos and are comparable to those found on dense assemblages (800 to 2000 g ash free DW m-') of the most investigated mussel, Mytzius eduiis. In addition, nutrient fluxes through bivalve excretion varied strongly within a few months, up to 10-fold (R. philippinarum) and 100-fold (M. senhousia) between April 1994 and August 1994, as related to the temporal change of bivalve standing stock. The extent of nutrient regeneration through diffusive flux was comparable to that reported for other intertidal zones of Japan and in the eutrophic Seto Inland Sea, within a range of 0.2 to 1.5 mmol NH4+-N m-' d-' and 0.01 to 0.05 mmol P043--P m-' d-I, thus more than 1 order of magnitude lower than that due to the excretory activity by R. phiiippinarum and M. senhousia. Our resuits indicate that the dominant bivalves, R. phihppinarum and M. senhousia, play a major role in the processes of benthic...

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“…Values are given as mean ± SD, n = 5-8. *Significantly different from the respective data at 10 °C, † significant difference between control and CO 2 -exposed mussels at the respective temperature 1 3 previously for M. edulis (Schlüter and Johansen 1994;Sukhotin and Pörtner 2001;Zittier et al 2015). During acute warming MO 2 increased progressively until a phase change, indicating a beginning thermal limitation, at a calculated breakpoint temperature of 20.5 °C (Fig.…”

Section: Thermal Limits Under Normocapniamentioning

confidence: 69%

Impact of ocean acidification on thermal tolerance and acid–base regulation of Mytilus edulis from the White Sea

et al. 2018

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Annual variation in condition, respiration and remineralisation ofMytilus edulis L. in the Sound, Denmark

Cited by 14 publications

References 37 publications

Impact of ocean acidification on thermal tolerance and acid–base regulation of Mytilus edulis (L.) from the North Sea

Impact of ocean acidification on thermal tolerance and acid–base regulation of Mytilus edulis (L.) from the North Sea

Temporal scaling and relevance of bivalve nutrient excretion on a tidal flat of the Seto Inland Sea, Japan

Impact of ocean acidification on thermal tolerance and acid–base regulation of Mytilus edulis from the White Sea

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