Extension rate: A primary control on the isotopic composition of West Indian (Jamaican) scleractinian reef coral skeletons

1975 ◽  
Vol 33 (3) ◽  
pp. 221-233 ◽  
Author(s):  
L. S. Land ◽  
J. C. Lang ◽  
D. J. Barnes
Keyword(s):  
Isotopic Composition ◽  
Reef Coral ◽  
West Indian ◽  
Extension Rate ◽  
Primary Control ◽  
Coral Skeletons

Seasonal high and low density bands in reef coral skeletons

Nature ◽  
1975 ◽  
Vol 255 (5511) ◽  
pp. 697-698 ◽  
Author(s):  
JON N. WEBER ◽  
PETER DEINES ◽  
EUGENE W. WHITE ◽  
PATRICIA H. WEBER
Keyword(s):  
Reef Coral ◽  
Low Density ◽  
Coral Skeletons

The utility of stable isotopic signatures in coral skeletons

1996 ◽  
Vol 1 ◽  
pp. 249-291 ◽  
Author(s):  
Peter K. Swart ◽  
Jim J. Leder
Keyword(s):  
Isotopic Composition ◽  
Dissolved Inorganic Carbon ◽  
Carbon Isotopic Composition ◽  
Oxygen Isotopic Composition ◽  
Stable Carbon ◽  
Carbon And Oxygen Isotopes ◽  
Coral Skeletons ◽  
Carbon And Oxygen Isotope ◽  
Oxygen Isotopic ◽  
Zooxanthellate Corals

There is a fundamental ecologic differentiation between zooxanthellate and non-zooxanthellate corals. This paper reviews factors which govern the stable carbon and oxygen isotopic composition of these groups of corals. Although the stable carbon and oxygen isotope compositions of coral skeletons are strongly influenced by environmental and physiological factors, the precise mechanisms remain a matter of debate. In particular the oxygen isotopic composition is known to be governed by the temperature and the oxygen isotopic composition of the water and perhaps also by kinetic factors. In contrast the carbon isotopic composition is controlled by a combination of photosynthesis, respiration, autotrophy, heterotrophy, and the isotopic composition of dissolved inorganic carbon. Using a combination of carbon and oxygen isotopes it is possible to distinguish zooxanthellate from non-zooxanthellate corals.

The stable isotopic composition of coral skeletons: control by environmental variables

1981 ◽  
Vol 45 (7) ◽  
pp. 1147-1153 ◽  
Author(s):  
Sandra M. Weil ◽  
Robert W. Buddemeier ◽  
Stephen V. Smith ◽  
Peter M. Kroopnick
Keyword(s):  
Isotopic Composition ◽  
Environmental Variables ◽  
Coral Skeletons ◽  
Stable Isotopic Composition ◽  
Stable Isotopic

Separation of kinetic and metabolic isotope effects in carbon-13 records preserved in reef coral skeletons

2000 ◽  
Vol 64 (6) ◽  
pp. 975-987 ◽  
Author(s):  
Jeffrey M. Heikoop ◽  
Jennifer J. Dunn ◽  
Michael J. Risk ◽  
Henry P. Schwarcz ◽  
Ted A. McConnaughey ◽  
...  
Keyword(s):  
Isotope Effects ◽  
Reef Coral ◽  
Coral Skeletons

scholarly journals Nutrients attenuate the negative effect of ocean acidification on reef coral calcification in the Arabian Sea upwelling zone (Masirah Island, Oman)

2021 ◽  
Author(s):  
Philipp Michael Spreter ◽  
Markus Reuter ◽  
Regina Mertz-Kraus ◽  
Oliver Taylor ◽  
Thomas Christian Brachert
Keyword(s):  
Ocean Acidification ◽  
Bulk Density ◽  
Arabian Sea ◽  
Reference Data ◽  
Reef Coral ◽  
Extension Rate ◽  
Data Set ◽  
Reef Corals ◽  
Negative Effect ◽  
Arabian Sea Upwelling

Abstract. Tropical shallow-water reefs are the most diverse ecosystem in the ocean. Its persistence rests upon adequate calcification rates of the reef building biota, such as reef corals. Optimum calcification rates of reef corals occur in oligotrophic environments with high seawater saturation states of aragonite (Ωsw), which leads to increased vulnerability to anthropogenic ocean acidification and eutrophication. The calcification response of reef corals to this changing environment is largely unknown, however. Here, we present annually and sub-annually resolved records of calcification rates (n = 3) of the coral Porites from the nutrient rich and low Ωsw Arabian Sea upwelling zone (Masirah Island, Oman). Calcification rates were determined from the product of skeletal extension and bulk density derived from X-ray densitometry. Compared to a reference data set of coral skeletons from typical reef environments (Great Barrier Reef, Hawaii), mean annual skeletal bulk density of Porites from Masirah Island is reduced by 28 %. This density deficit prevails over the entire year and probably reflects a year-round low saturation state of aragonite at the site of calcification (Ωcf), independent of seasonal variations in Ωsw (e.g. upwelling). Mean annual extension rate is 20 % higher than for the reference data set. In particular, extension rate is strongly enhanced during the seasons with the lowest water temperatures, presumably due to a high PO43−/NO3−-ratio promoting rapid upward growth of the skeleton. Enhanced annual extension attenuates the negative effect of low density on calcification rate from −25 % to −11 %, while sub-annual calcification rates during the cool seasons even exceed those of the reference corals. We anticipate optimal nutrient environments (e.g. high PO43−/NO3−-ratios) to have significant potential to compensate the negative effect of ocean acidification on reef coral calcification, thereby allowing to maintain adequate rates of carbonate accumulation, which are essential for preserving this unique ecosystem.

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