Temporal changes in the growth of two Mediterranean cold-water coral species, in situ and in aquaria

Lartaud, Franck; Pareige, Simon; Rafélis, Marc de; Feuillassier, Lionel; Bideau, Marjorie; Péru, Erwan; Vega, Elwyn de la; Nedoncelle, K.; Romans, Pascal; Bris, Nadine Le

doi:10.1016/j.dsr2.2013.06.024

Cited by 32 publications

(22 citation statements)

References 49 publications

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“…The sympatric palaeo-coral occurrence of L. pertusa and M. oculata suggests a common history of these species in terms of range contraction and expansion. This common response to past environmental change may not hold true in light of recent studies (Lartaud, Meistertzheim, Peru, & Le Bris, 2017;Lartaud et al, 2014) pointing to physiological differences between both species, particularly in terms of optimal growth temperatures. The two CWC may demonstrate dissimilar ecological strategies.…”

Section: Introductionmentioning

confidence: 96%

Out of the Mediterranean? Post‐glacial colonization pathways varied among cold‐water coral species

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Becheler

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et al. 2019

Journal of Biogeography

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Aim To infer cold‐water corals’ (CWC) post‐glacial phylogeography and assess the role of Mediterranean Sea glacial refugia as origins for the recolonization of the northeastern Atlantic Ocean. Location Northeastern Atlantic Ocean and Mediterranean Sea. Taxon Lophelia pertusa, Madrepora oculata. Methods We sampled CWC using remotely operated vehicles and one sediment core for coral and sediment dating. We characterized spatial genetic patterns (microsatellites and a nuclear gene fragment) using networks, clustering and measures of genetic differentiation. Results Inferences from microsatellite and sequence data were congruent, and showed a contrast between the two CWC species. Populations of L. pertusa present a dominant pioneer haplotype, local haplotype radiations and a majority of endemic variation in lower latitudes. Madrepora oculata populations are differentiated across the northeastern Atlantic and genetic lineages are poorly admixed even among neighbouring sites. Conclusions Our study shows contrasting post‐glacial colonization pathways for two key habitat‐forming species in the deep sea. The CWC L. pertusa has likely undertaken a long‐range (post‐glacial) recolonization of the northeastern Atlantic directly from refugia located along southern Europe (Mediterranean Sea or Gulf of Cadiz). In contrast, the stronger genetic differentiation of M. oculata populations mirrors the effects of long‐term isolation in multiple refugia. We suggest that the distinct and genetically divergent, refugial populations initiated the post‐glacial recolonization of the northeastern Atlantic margins, leading to a secondary contact in the northern range and reaching higher latitudes much later, in the late Holocene. This study highlights the need to disentangle the influences of present‐day dispersal and evolutionary processes on the distribution of genetic polymorphisms, to unravel the influence of past and future environmental changes on the connectivity of cosmopolitan deep‐sea ecosystems associated with CWC.

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Section: Introductionmentioning

confidence: 96%

Out of the Mediterranean? Post‐glacial colonization pathways varied among cold‐water coral species

Boavida

Becheler

Choquet

et al. 2019

Journal of Biogeography

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“…Scleractinian cold-water corals (CWC) such as Lophelia pertusa and Madrepora oculata, iconic engineer species of submarine canyons, are important frame-builders that provide shelter for a large diversity of associated fauna (Buhl-Mortensen et al, 2010). During the last decades, significant efforts have been dedicated to characterize CWC's feeding, reproduction, growth, and their associated coral microbiome (Waller and Tyler, 2005;Tsounis et al, 2010;Lartaud et al, 2014;Meistertzheim et al, 2016;Galand et al, 2020). However, due to the difficulty of sampling in the deep sea, a detailed knowledge of their ecology is still lacking when compared to their shallow water counterparts.…”

Section: Introductionmentioning

confidence: 99%

“…The relative abundance and/or spatial distribution of L. pertusa and M. oculata change following geographical locations, which suggests different living strategies (Freiwald et al, 2004;Schröder-Ritzrau et al, 2005;Lartaud et al, 2019). The two species exhibit different responses to environmental changes (Naumann et al, 2014), different skeletal growth rates (Lartaud et al, 2014), reproductive cycles (Waller and Tyler, 2005), feeding strategies (Tsounis et al, 2010;Gori et al, 2014;Galand et al, 2020), and bacterial community associations (Hansson et al, 2009;Meistertzheim et al, 2016;Galand et al, 2018Galand et al, , 2020, with a more stable microbiome for M. oculata.…”

Section: Introductionmentioning

confidence: 99%

“…The general aim of this study was to test how the local habitat of L. pertusa and M. oculata impact their bacterial associations, together with other integrative parameters such as coral calcification and mortality. The study was based on in situ transplant experiments with sampling and redeployment of coral fragments at two contrasted sites, one deeper and one shallower, in the Lacaze-Duthiers canyon (LDC) where L. pertusa and M. oculata reefs are naturally abundant (Fiala et al, 2010;Gori et al, 2013;Lartaud et al, 2014). This multidisciplinary approach ultimately aimed at better understanding the adequacy between CWC and their surrounding environmental conditions, and thus to better assess their resilience to a changing ocean.…”

Section: Introductionmentioning

confidence: 99%

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Local Variability in Microbiome Composition and Growth Suggests Habitat Preferences for Two Reef-Building Cold-Water Coral Species

et al. 2020

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Cold-water coral (CWC) ecosystems provide niches and nurseries for many deep-sea species. Lophelia pertusa and Madrepora oculata, two cosmopolitan species forming three dimensional structures, are found in cold waters under specific hydrological regimes that provide food and reoxygenation. There is now more information about their feeding, their growth and their associated microbiome, however, little is known about the influence of their habitat on their physiology, or on the composition of their bacterial community. The goal of this study was to test if the habitat of L. pertusa and M. oculata influenced the hosts associated bacterial communities, the corals' survival and their skeletal growth along the slope of a submarine canyon. A transplant experiment was used, based on sampling and cross-redeployment of coral fragments at two contrasted sites, one deeper and one shallower. Our results show that M. oculata had significantly higher skeletal growth rates in the shallower site and that it had a specific microbiome that did not change between sites. Inversely, L. pertusa had the same growth rates at both sites, but its bacterial community compositions differed between locations. Additionally, transplanted L. pertusa acquired the microbial signature of the local corals. Thus, our results suggest that M. oculata prefer the shallower habitat.

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“…There is evidence that deep-sea corals in the Gulf of Mexico live close to the aragonite saturation horizon ( ar ∼ 1) with ] about 94 µmol Kg −1 (Georgian et al, 2016a). Moreover, these species naturally exhibit slow growth and calcification rates, which range between ∼2 to 9 mm year −1 (Brooke and Young, 2009;Larcom et al, 2014;Lartaud et al, 2014) making them particularly vulnerable to the effects of future ocean acidification. Nevertheless, recent evidence from experimental studies suggests that cold-water corals can be resistant to low aragonite saturation states, and may even be able to calcify in undersaturated conditions (Form and Riebesell, 2012;Maier et al, 2013;Hennige et al, 2015), though at a reduced rate (Maier et al, 2009;Lunden et al, 2014a).…”

Section: Introductionmentioning

confidence: 99%

Intra-Specific Variation Reveals Potential for Adaptation to Ocean Acidification in a Cold-Water Coral from the Gulf of Mexico

et al. 2017

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Ocean acidification, the decrease in seawater pH due to the absorption of atmospheric CO 2 , profoundly threatens the survival of a large number of marine species. Cold-water corals are considered to be among the most vulnerable organisms to ocean acidification because they are already exposed to relatively low pH and corresponding low calcium carbonate saturation states ( ). Lophelia pertusa is a globally distributed cold-water scleractinian coral that provides critical three-dimensional habitat for many ecologically and economically significant species. In this study, four different genotypes of L. pertusa were exposed to three pH treatments (pH = 7.60, 7.75, and 7.90) over a short (2-week) experimental period, and six genotypes were exposed to two pH treatments (pH = 7.60 and 7.90) over a long (6-month) experimental period. Their physiological response was measured as net calcification rate and the activity of carbonic anhydrase, a key enzyme in the calcification pathway. In the short-term experiment, net calcification rates did not significantly change with pH, although they were highly variable in the low pH treatment, including some genotypes that maintained positive net calcification in undersaturated conditions. In the 6-month experiment, average net calcification was significantly reduced at low pH, with corals exhibiting net dissolution of skeleton. However, one of the same genotypes that maintained positive net calcification (+0.04% day −1 ) under the low pH treatment in the short-term experiment also maintained positive net calcification longer than the other genotypes in the long-term experiment, although none of the corals maintained positive calcification for the entire 6 months. Average carbonic anhydrase activity was not affected by pH, although some genotypes exhibited small, insignificant, increases in activity after the sixth month. Our results suggest that while net calcification in L. pertusa is adversely affected by ocean acidification in the long term, it is possible that some genotypes may prove to be more resilient than others, particularly to short perturbations of the carbonate system. These results provide evidence that populations of L. pertusa in the Gulf of Mexico may contain the genetic variability necessary to support an adaptive response to future ocean acidification.

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Temporal changes in the growth of two Mediterranean cold-water coral species, in situ and in aquaria

Cited by 32 publications

References 49 publications

Out of the Mediterranean? Post‐glacial colonization pathways varied among cold‐water coral species

Out of the Mediterranean? Post‐glacial colonization pathways varied among cold‐water coral species

Local Variability in Microbiome Composition and Growth Suggests Habitat Preferences for Two Reef-Building Cold-Water Coral Species

Intra-Specific Variation Reveals Potential for Adaptation to Ocean Acidification in a Cold-Water Coral from the Gulf of Mexico

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