Short-term metabolic and growth responses of the cold-water coral Lophelia pertusa to ocean acidification

Hennige, Sebastian; Wicks, Laura C.; Kamenos, Nicholas A.; Bakker, D. C. E.; Findlay, Helen S.; Dumousseaud, Cynthia; Roberts, J. Murray

doi:10.1016/j.dsr2.2013.07.005

Cited by 90 publications

(104 citation statements)

References 48 publications

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“…These growth rates are comparable to those previously measured on the same CWC species using different techniques [19][20][21][22]. However, the average growth rate of L. pertusa observed in the experiment of Form and Riebesell [13] was about one order of magnitude lower than in previous works, probably due to the lower incubation temperature used by these authors (7.5 °C) compared to other studies (between 10 and 13 °C).…”

Section: Measured Parameterscontrasting

confidence: 35%

“…For instance, the first short-term studies based on short incubations (between 24 h and 1 week-long) conducted on specimens of Lophelia pertusa and Madrepora oculata, found a reduction in the calcification rate ranging from 30% to 56% when the pH was dropped between 0.1 and 0.3 units [13,19,20]. On the contrary, in the most recent short-term (between 24 h and 21 days) and in the two medium-term experiments (between 6 months and 9 months) conducted to date with the same species, no effects were observed when rearing corals at pH values similar to those expected by the end of the century [13,[20][21][22]. Thus, despite the different results observed in the first short-term experiments, the outcomes so far from medium-term experiments evidence that some CWC species could be well adapted to possible changes in the chemical conditions of seawater.…”

Section: Introductionmentioning

confidence: 77%

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Resistance of Two Mediterranean Cold-Water Coral Species to Low-pH Conditions

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et al. 2013

Water

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Deep-water ecosystems are characterized by relatively low carbonate concentration values and, due to ocean acidification (OA), these habitats might be among the first to be exposed to undersaturated conditions in the forthcoming years. However, until now, very few studies have been conducted to test how cold-water coral (CWC) species react to such changes in the seawater chemistry. The present work aims to investigate the mid-term effect of decreased pH on calcification of the two branching CWC species most widely distributed in the Mediterranean, Lophelia pertusa and Madrepora oculata. No significant effects were observed in the skeletal growth rate, microdensity and porosity of both species after 6 months of exposure. However, while the calcification rate of M. oculata was similar for all colony fragments, a heterogeneous skeletal growth pattern was observed in L. pertusa, the younger nubbins showing higher growth rates than the older ones. A higher energy demand is expected in these young, fast-growing fragments and, therefore, a reduction in calcification might be noticed earlier during long-term exposure to acidified conditions. OPEN ACCESSWater 2014, 6 60

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Section: Measured Parameterscontrasting

confidence: 35%

Section: Introductionmentioning

confidence: 77%

Resistance of Two Mediterranean Cold-Water Coral Species to Low-pH Conditions

Movilla

Gori

Calvo

et al. 2013

Water

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“…The interplay between current speeds, food supply and temperature is key for coral presence at the MRC, and any changes could result in a smaller optimal growth range at the MRC and other reefs that thrive in similar conditions. Ocean acidification is of major concern for many marine ecosystems, particularly calcifiers already growing in water masses close to carbonate under-saturation such as coldwater coral reefs (Guinotte et al 2006;Roberts et al 2006;Turley et al 2006;Aze et al 2014;Hennige et al 2014). Ocean acidification impacts not only surface waters but the carbonate chemistry at depth (Caldeira and Wickett 2003).…”

Section: Future Implications: Climate Changementioning

confidence: 99%

Using novel acoustic and visual mapping tools to predict the small-scale spatial distribution of live biogenic reef framework in cold-water coral habitats

et al. 2016

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Cold-water corals form substantial biogenic habitats on continental shelves and in deep-sea areas with topographic highs, such as banks and seamounts. In the Atlantic, many reef and mound complexes are engineered by Lophelia pertusa, the dominant framework-forming coral. In this study, a variety of mapping approaches were used at a range of scales to map the distribution of both cold-water coral habitats and individual coral colonies at the Mingulay Reef Complex (west Scotland). The new ArcGIS-based British Geological Survey (BGS) seabed mapping toolbox semi-automatically delineated over 500 Lophelia reef 'minimounds' from bathymetry data with 2-m resolution. The morphometric and acoustic characteristics of the minimounds were also automatically quantified and captured using this toolbox. Coral presence data were derived from high-definition remotely operated vehicle (ROV) records and high-resolution microbathymetry collected by a ROVmounted multibeam echosounder. With a resolution of 0.35 9 0.35 m, the microbathymetry covers 0.6 km 2 in the centre of the study area and allowed identification of individual live coral colonies in acoustic data for the first time. Maximum water depth, maximum rugosity, mean rugosity, bathymetric positioning index and maximum current speed were identified as the environmental variables that contributed most to the prediction of live coral presence. These variables were used to create a predictive map of the likelihood of presence of live cold-water coral colonies in the area of the Mingulay Reef Complex covered by the 2-m resolution data set. Predictive maps of live corals across the reef will be especially valuable for future long-term monitoring surveys, including those needed to understand the impacts of global climate change. This is the first study using the newly developed BGS seabed mapping toolbox and an ROV-based microbathymetric grid to explore the environmental variables that control coral growth on cold-water coral reefs.

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“…Experimental climate change related studies on coldwater corals conducted so far involved mainly unifactorial manipulations and short-term incubation approaches (i.e., Dodds et al, 2007;Maier et al, 2009Maier et al, , 2013aHennige et al, 2014;Lunden et al, 2014). Form and Riebesell (2012) highlighted the importance of long-term perturbations of corals in ocean change research as acclimatisation of these slow-growing animals is expected to be relatively slow.…”

Section: Introductionmentioning

confidence: 99%

“…We aimed at identifying how differently L. pertusa reacts towards multiple climate change stressors when fed with a higher amount of zooplankton food compared to 10-fold lower food availability. It was suggested that calcification rates might be maintained under an acidified environment via mobilising lipid reserves from the coral's tissue (Maier et al, 2013b;Hennige et al, 2014), but this source of stored energy is bound to decline on longer time scales. Furthermore, elevated temperatures might lead to increased metabolic rates (Dodds et al, 2007) that require additional energetic input.…”

Section: Introductionmentioning

confidence: 99%

Interactive Effects of Ocean Acidification and Warming on Growth, Fitness and Survival of the Cold-Water Coral Lophelia pertusa under Different Food Availabilities

2017

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Cold-water corals are important bioengineers that provide structural habitat for a diverse species community. About 70% of the presently known scleractinian cold-water corals are expected to be exposed to corrosive waters by the end of this century due to ocean acidification. At the same time, the corals will experience a steady warming of their environment. Studies on the sensitivity of cold-water corals to climate change mainly concentrated on single stressors in short-term incubation approaches, thus not accounting for possible long-term acclimatisation and the interactive effects of multiple stressors. Besides, preceding studies did not test for possible compensatory effects of a change in food availability. In this study a multifactorial long-term experiment (6 months) was conducted with end-of-the-century scenarios of elevated pCO 2 and temperature levels in order to examine the acclimatisation potential of the cosmopolitan cold-water coral Lophelia pertusa to future climate change related threats. For the first time multiple ocean change impacts including the role of the nutritional status were tested on L. pertusa with regard to growth, "fitness," and survival. Our results show that while L. pertusa is capable of calcifying under elevated CO 2 and temperature, its condition (fitness) is more strongly influenced by food availability rather than changes in seawater chemistry. Whereas growth rates increased at elevated temperature (+4 • C), they decreased under elevated CO 2 concentrations (∼800 µatm). No difference in net growth was detected when corals were exposed to the combination of increased CO 2 and temperature compared to ambient conditions. A 10-fold higher food supply stimulated growth under elevated temperature, which was not observed in the combined treatment. This indicates that increased food supply does not compensate for adverse effects of ocean acidification and underlines the importance of considering the nutritional status in studies investigating organism responses under environmental changes.

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Short-term metabolic and growth responses of the cold-water coral Lophelia pertusa to ocean acidification

Cited by 90 publications

References 48 publications

Resistance of Two Mediterranean Cold-Water Coral Species to Low-pH Conditions

Resistance of Two Mediterranean Cold-Water Coral Species to Low-pH Conditions

Using novel acoustic and visual mapping tools to predict the small-scale spatial distribution of live biogenic reef framework in cold-water coral habitats

Interactive Effects of Ocean Acidification and Warming on Growth, Fitness and Survival of the Cold-Water Coral Lophelia pertusa under Different Food Availabilities

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