In situ short-term growth rates of a cold-water coral.

Jantzen, Carin, Laudien, Jürgen, Sokol, Stefanie, Försterra, Günther, Häussermann, Vreni, Kupprath, Franziska and Richter, Claudio (2013) In situ short-term growth rates of a cold-water coral. Marine and Freshwater Research, 64 (7). pp. 631-641. DOI 10.1071/MF12200.

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Cold-water corals are known to grow much slower than their tropical counterparts. However, this assumption is mainly based on laboratory measurements exposing specimens to conditions that differ from their natural environments. The cosmopolitan scleractinian Desmophyllum dianthus forms dense banks below 18 m in northern Patagonia, Chile. So as to measure in situ growth rates of this cold-water coral, specimens were collected from two sites, weighed and deployed on holders in their natural headlong orientation at the respective collecting site. Corals exhibited a calcium carbonate (CaCO3) mass increase of 5.44 ± 3.45 (mg (cm2 projected calyx area)–1 day–1) after 2 weeks, equivalent to a mass gain of 0.25 ± 0.18 s.d. % day–1. In comparison, D. dianthus specimens from the same collection sites maintained in an on-site flow-through aquarium system showed lower growth rates that were third of the in situ rates. In situ CaCO3 precipitation of D. dianthus extrapolated for 1 year (kg m2 year–1) displays the same order of magnitude as reported for massive growing tropical scleractinians, e.g. Porites sp.

Document Type: Article
Keywords: buoyant-weight technique, Desmophyllum dianthus, fjords, in situ CaCO3 precipitation, mass increase, Patagonia, Scleractinia
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-B Experimental Ecology - Benthic Ecology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1071/MF12200
ISSN: 1323-1650
Projects: ERRINA
Date Deposited: 11 Mar 2013 11:02
Last Modified: 23 Sep 2019 18:33

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