Suzuki, Yoshimi; Nakashima, Norihir; Yoshida, Katsumi; Casareto, Beatriz E; Taki, Masahito; Hiraga, Tetsuo; Okabayashi, Tetsuo; Ito, Hiroshi; Yamada, Koichi; Suzuki, A; Nakamori, T; Kayanne, Hajime (1995): Seawater carbonate chemistry and community calcification during Miyako Island (Japan) coral reef studies, 1994 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.721926, Supplement to: Suzuki, A; Nakamori, T; Kayanne, Hajime (1995): The mechanism of production enhancement in coral reef carbonate systems: model and empirical results. Sedimentary Geology, 99(3-4), 259-280, https://doi.org/10.1016/0037-0738(95)00048-D
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Abstract:
Coral reefs are characterized by enormous carbonate production of the organisms. It is known that rapid calcification is linked to photosynthesis under control of the carbonate equilibrium in seawater. We have established a model simulating the coexisting states of photosynthesis and calcification in order to examine the effects of photosynthesis and calcification on the carbonate system in seawater. Supposing that the rates of photosynthesis and calcification are proportional to concentrations of their inorganic carbon source, the model calculations indicate that three kinds of unique interactions of the organic and inorganic carbon productions are expected. These are photosynthetic enhancement of calcification, calcification which benefits photosynthesis and carbonate dissolution induced by respiration. The first effect appears when the photosynthetic rate is more than approximately 1.2 larger than that of calcification. This effect is caused by the increase of CO3 content and carbonate saturation degree in seawater. If photosynthesis use molecular carbon dioxide, the second effect occurs when the calcification rate is more than approximately 1.6 times larger than that of photosynthesis. Time series model experiments indicate that photosynthesis and calcification potentially enhance each other and that organic and inorganic carbon is produced more efficiently in the coexisting system than in the isolated reactions.
These coexisting effects on production enhancement of photosynthesis and calcification are expected to appear not only in the internal pool of organisms but also in a reef environment which is isolated from the outer ocean during low tide. According to the measurements on the fringing type Shiraho Reef in the Ryukyu Islands, the diurnal change of water properties (pH, total alkalinity, total carbon dioxide and carbonate saturation degree) were conspicuous. This environment offers an appropriate condition for the appearance of these coexisting effects. The photosynthetic enhancement of calcification and the respiratory inducement of decalcification were observed during day-time and night-time slack-water periods, respectively. These coexisting effects, especially the photosynthetic enhancement of calcification, appear to play important roles for fluorishing coral reef communities.
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Suzuki, Yoshimi; Nakashima, Norihir; Yoshida, Katsumi; Casareto, Beatriz E; Taki, Masahito; Hiraga, Tetsuo; Okabayashi, Tetsuo; Ito, Hiroshi; Yamada, Koichi (1994): The important role of organic mater cycling for the biological fixation of CO2 in coral reefs. 2nd International Conference on carbon dioxide removal, 24-27 October 1994, Kyoto, Japan, 1-4, hdl:10013/epic.34197.d001
Project(s):
Funding:
Sixth Framework Programme (FP6), grant/award no. 511106: European network of excellence for Ocean Ecosystems Analysis
Coverage:
Latitude: 24.500000 * Longitude: 124.170000
Date/Time Start: 1990-09-20T11:00:00 * Date/Time End: 1990-09-21T05:00:00
Minimum DEPTH, water: 0 m * Maximum DEPTH, water: 1 m
Event(s):
Comment:
In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne and Gattuso, 2011) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI).
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
189 data points