Annual growth rate of the calcareous red algaLithothamnion corallioides(Corallinales, Rhodophyta) in the Bay of Brest, France
✍ Scribed by P. Potin; J. Y. Floc'h; C. Augris; J. Cabioch
- Publisher
- Springer
- Year
- 1990
- Tongue
- English
- Weight
- 274 KB
- Volume
- 204-205
- Category
- Article
- ISSN
- 1573-5141
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✦ Synopsis
Lithothamnion corallioides Crouan et Crouan (Rhodophyta, Corallinales) is the main constituent of the maerl beds of the Bay of Brest (Atlantic coast of western Brittany) . Its growth rate was measured monthly in situ during one year . Growth rates were obtained by an adaptation of the buoyant weight technique . The highest daily growth rate was observed in July and reached 0 .26 % d -' (S .D. = 0 .06), when expressed as the increase of calcium carbonate weight . The average daily growth rate was 0 .12% d -' (S .D. = 0 .04) for a period of 275 days (summer and autumn 1988, winter 1989) . Using this preliminary data, the calcium carbonate accretion rate can be estimated provisionally : 876 gm-2 year -', a rate much lower than that of tropical reef coralline algae, but higher than that of Lithophyllum incrustans, the well known temperate European reef-builder .