Variability in growth rates of long-lived black coral Leiopathes sp. from the Azores

Five colonies of black coral Leiopathes sp. were collected as bycatch from depths of 293 to 366 m from the Condor, Acor, and Voador seamounts (Azores region). The colonies had axial diameters between 4.9 and 33.1 mm and heights between 43 and 175 cm. Their ages and radial growth rates were estimated using radiocarbon dating. Results indicated that the smallest and largest colonies had similar radial growth rates of 5 to 7 µm yr �1 , whereas the other 3 colonies had grown more rapidly by a factor of 3 to 5 at ~20 to 30 µm yr �1 . Colony lifespan ranged between 265 ± 90 and 2320 ± 90 yr. Fine-scale sampling along a radial transect from the edge to the center of the 2320 yr old Leiopathes sp. revealed variable growth rates throughout the colony lifespan. Slower radial growth rates of ~4 to 5 µm yr �1 were recorded over the initial 1600 yr and the last 300 yr of its life span, and a period of more rapid growth (20 µm yr �1 ) over the intermediate 400 yr of its life. Variability in radial growth rates among colonies resulted in colony ages that were not linearly correlated to colony axis diameter or height. Our findings of great longevity and slow growth rates for Leiopathes sp. agree with other Leiopathes sp. age and growth studies, indicating that colony and population recovery from damage or removal may take centuries to millennia.

[1]  L. Dueñas,et al.  Character lability in deep-sea bamboo corals (Octocorallia, Isididae, Keratoisidinae) , 2009 .

[2]  Alan Williams,et al.  Seamount benthic macrofauna off southern tasmania: community structure and impacts of trawling , 2001 .

[3]  Jan Helge Fosså,et al.  Trawling damage to Northeast Atlantic ancient coral reefs , 2002, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[4]  Stephen D. Cairns,et al.  Cold-Water Corals: Cold-water corals , 2009 .

[5]  T. Morato,et al.  Cold-water corals landed by bottom longline fisheries in the Azores (north-eastern Atlantic) , 2012, Journal of the Marine Biological Association of the United Kingdom.

[6]  G. Wolff,et al.  Seamounts and organic matter—Is there an effect? The case of Sedlo and Seine Seamounts: Part 1. Distributions of dissolved and particulate organic matter , 2009 .

[7]  Erik Cordes,et al.  Age, growth and radiometric age validation of a deep-sea, habitat-forming gorgonian (Primnoa resedaeformis) from the Gulf of Alaska , 2002, Hydrobiologia.

[8]  L. Nøttestad,et al.  Distribution and abundance of fish in deep-sea coral habitats , 2002, Hydrobiologia.

[9]  J. Reed.  Deep-water Oculina coral reefs of Florida: biology, impacts, and management , 2002, Hydrobiologia.

[10]  T. Guilderson,et al.  Radiocarbon‐based ages and growth rates of bamboo corals from the Gulf of Alaska , 2005 .

[11]  R. Stone,et al.  Growth rate and age determination of bamboo corals from the northeastern Pacific Ocean using refined 210Pb dating , 2009 .

[12]  Brian J. Bett,et al.  Role of cold-water Lophelia pertusa coral reefs as fish habitat in the NE Atlantic , 2005 .

[13]  K. Sebens.  THE LIMITS TO INDETERMINATE GROWTH: AN OPTIMAL SIZE MODEL APPLIED TO PASSIVE SUSPENSION FEEDERS' , 1982 .

[14]  D. Scott,et al.  Late Holocene radiocarbon and aspartic acid racemization dating of deep-sea octocorals , 2006 .

[15]  M. Love,et al.  AgE OF BLACk CORAL (Antip Athe S dendrochriSto S) COLONIES, w ITh NOTES ON ASSOCIATEd INv ERTEBRATE SPECIES , 2007 .

[16]  M. Holdgate,et al.  Mountains in the Sea , 1959 .

[17]  David A. Mucciarone,et al.  Extreme longevity in proteinaceous deep-sea corals , 2009, Proceedings of the National Academy of Sciences.

[18]  Evan N. Edinger,et al.  Ages and growth rates of some deep-sea gorgonian and antipatharian corals of Newfoundland and Labrador , 2009 .

[19]  C. Buck,et al.  IntCal13 and Marine13 Radiocarbon Age Calibration Curves 0–50,000 Years cal BP , 2013, Radiocarbon.

[20]  A. Soares,et al.  Radiocarbon dating of marine samples from Gulf of Cadiz: The reservoir effect , 2010 .

[21]  Malcolm R. Clark,et al.  Effect of deepwater trawling on the macro-invertebrate assemblages of seamounts on the Chatham Rise, New Zealand , 2009 .

[22]  P. Yiou,et al.  Variability of the northeast Atlantic sea surface Δ14C and marine reservoir age and the North Atlantic Oscillation (NAO) , 2010 .

[23]  M. Stuiver.  14C distribution in the Atlantic Ocean , 1980 .

[24]  G. Cailliet,et al.  Age and growth of two genera of deep-sea bamboo corals (family isididae) in New Zealand waters , 2007 .

[25]  E. Roark,et al.  Growth validation of gold coral Gerardia sp. in the Hawaiian Archipelago , 2009 .

[26]  Rudy J. Kloser,et al.  Impacts of bottom trawling on deep-coral ecosystems of seamounts are long-lasting , 2009 .

[27]  S. Ross,et al.  Deep-water antipatharians: Proxies of environmental change , 2006 .

[28]  M. Stuiver,et al.  Discussion: Reporting of 14 C Data , 1977 .

[29]  Ana Colaço,et al.  Mapping Condor Seamount Seafloor Environment and Associated Biological Assemblages (Azores, NE Atlantic) , 2012 .

[30]  E. Pante,et al.  Biology of deep-water octocorals. , 2011, Advances in marine biology.

[31]  Robert B. Dunbar,et al.  Radiocarbon-based ages and growth rates of Hawaiian deep-sea corals , 2006 .

[32]  A. Metaxas,et al.  Megafauna associated with assemblages of deep-water gorgonian corals in Northeast Channel, off Nova Scotia, Canada , 2005, Journal of the Marine Biological Association of the United Kingdom.

[33]  Marina Carreiro-Silva,et al.  Carrying behavior in the deep-sea crab Paromola cuvieri (Northeast Atlantic) , 2011, Marine Biodiversity.

[34]  M. Montero,et al.  Is There a Seamount Effect on Microbial Community Structure and Biomass? The Case Study of Seine and Sedlo Seamounts (Northeast Atlantic) , 2012, PloS one.

[35]  M. Powell,et al.  Conservation and management implications of deep-sea coral and fishing effort distributions in the Northeast Pacific Ocean , 2005 .

[36]  N. Prouty,et al.  Growth rate and age distribution of deep-sea black corals in the Gulf of Mexico , 2011 .

[37]  K. Gjerde,et al.  Management and Conservation of Seamounts , 2008 .

[38]  J. Southon,et al.  Gerardia: Bristlecone pine of the deep-sea? , 1995 .

[39]  G. Henderson,et al.  Growth rates of the deep-sea scleractinia Desmophyllum cristagalli and Enallopsammia rostrata , 2004 .

[40]  Evan N. Edinger,et al.  Stable C and N isotopic composition of cold-water corals from the Newfoundland and Labrador continental slope: Examination of trophic, depth and spatial effects , 2008 .

[41]  M. Sayago-Gil,et al.  Effects of deep-sea bottom longlining on the Hatton Bank fish communities and benthic ecosystem, north-east Atlantic , 2010, Journal of the Marine Biological Association of the United Kingdom.

[42]  H. Lasker,et al.  Allometry of resource capture in colonial cnidarians and constraints on modular growth , 1998 .

[43]  B. Christiansen,et al.  Toward the conservation and management of Sedlo Seamount: A case study , 2009 .