Prey-capture rates in four Mediterranean cold water corals

Tsounis, Georgios; Orejas, Covadonga; Reynaud, Stéphanie; Gili, Josep María; Allemand, Denis; Ferrier‐Pagés, Christine

doi:10.3354/meps08312

Cited by 62 publications

(69 citation statements)

References 52 publications

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“…At higher temperatures metabolic rates can be increased (Dodds et al, 2007) and, thus, require greater energetic demands. Lower flow velocities applied by Tsounis et al (2010) additionally enhance the food capture efficiency (Purser et al, 2010). A recently published feeding study by Orejas et al (2016) using different food types confirmed that lower flow velocities enhance food capturing by L. pertusa.…”

Section: Growth Ratesmentioning

confidence: 61%

“…According to food capture rate calculations based on a flume experiment by Purser and colleagues, the maximum feeding rates of L. pertusa in one feeding occasion were about 73 Artemia nauplii polyp −1 h −1 , equating to 66 µg C polyp −1 h −1 (Purser et al, 2010). However, Tsounis et al (2010) reported higher capture rates of ∼284 ± 130 individuals polyp −1 h −1 by L. pertusa, but experiments in this study were done at 12 • C and, therewith, four degrees higher temperature than in the compared study. At higher temperatures metabolic rates can be increased (Dodds et al, 2007) and, thus, require greater energetic demands.…”

Section: Growth Ratesmentioning

confidence: 99%

“…In Tsounis et al (2010) initial food densities were far higher with 10-20 Artemia nauplii mL −1 compared to 0.345-1.035 nauplii mL −1 in the study by Purser et al (2010) and 0.1 copepods mL −1 in the study by Orejas et al (2016). Compared to these studies, our food concentration in the experimental tanks was well in the range of the study by Purser et al (2010) with ∼0.3 Artemia nauplii mL −1 in the low food treatments and ∼3 nauplii mL −1 in the high food aquaria.…”

Section: Growth Ratesmentioning

confidence: 99%

See 2 more Smart Citations

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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Section: Growth Ratesmentioning

confidence: 61%

Section: Growth Ratesmentioning

confidence: 99%

Section: Growth Ratesmentioning

confidence: 99%

See 1 more Smart Citation

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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“…This leads to a southward flow that merges with the southward flow of the lower thermocline in the interior of the basin to make up the outflow of Red Sea Water through Bab El Mandeb. Laboratory and field observations have shown that DWC can selectively feed on live zooplankton or suspended particulate organic matter (Mortensen et al, 2001;Freiwald et al, 2002;Kiriakoulakis et al, 2007;Tsounis et al, 2010). Relatively high nutrient levels were observed in the bottom layers (Table 2) compared to the surface layers, which indicates the availability of organic matter.…”

Section: Discussionmentioning

confidence: 99%

In-situ observation of deep water corals in the northern Red Sea waters of Saudi Arabia

Qurban

Krishnakumar

Joydas

et al. 2014

Deep Sea Research Part I: Oceanographic Research Papers

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“…When the currents are too high, polyp tentacles are bent backwards, reducing their ability to capture food (Sebens and Johnson 1991;Dai and Lin 1993;Purser et al 2010). In slower currents, corals may also be more successful in bringing food to their mouth, as prey could break loose more easily under higher flow conditions that provide more momentum to escape from the entrapping mucus strands of the tentacles (Patterson 1984;Tsounis et al 2010). It is important to note that the differences in depth and current speed between mini-mounds with and without live coral cover are small.…”

Section: Environmental Variablesmentioning

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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Prey-capture rates in four Mediterranean cold water corals

Cited by 62 publications

References 52 publications

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

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

In-situ observation of deep water corals in the northern Red Sea waters of Saudi Arabia

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

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