NDLI: Influence of water flow on skeletal isotopic composition in the coral Pocillopora damicornis

Content Provider	Springer Nature Link
Author	Suzuki, A. Nakamura, T. Yamasaki, H. Mishima, K. Kawahata, H.
Copyright Year	2007
Abstract	Fragments of branching Pocillopora damicornis coral colonies were grown in experimental flumes under two water flow regimes. Colony size and buoyant weight increased most rapidly in the fast-flow regime. Branch tips from the upper and outer parts of the colonies showed the lowest and most consistent skeletal oxygen isotope ratios. Flow regime had little influence on the lowest oxygen isotope ratios, which were at least 3.5‰ lighter than the calculated oxygen isotopic equilibrium. These “kinetic” isotope effects are comparable to those observed in Porites corals. Relatively more branch tips showed extreme 18O depletions under low-flow conditions, and among small coral colonies. Isotopic variability was greater among branch tips from the lower and inner parts of the colonies and at high flow. Skeletal oxygen and carbon isotope ratios generally showed positive correlations. Despite the particularly large offsets from isotopic equilibrium, the isotopically lightest branches showed the greatest isotopic consistency and therefore would make the best isotopic thermometers. Isotopic variability within the colony may provide an indication of flow regime.
Starting Page	209
Ending Page	218
Page Count	10
File Format	PDF
ISSN	07224028
Journal	Coral Reefs
Volume Number	27
Issue Number	1
e-ISSN	14320975
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-09-28
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Coral skeleton Oxygen isotope Carbon isotope Water flow Growth rate Kinetic isotope effects Oceanography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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