Open AccessBioerosion in the carbonate budget of two Indo-Pacific reefs: La Réunion (Indian Ocean) and Mooréa (Pacific Ocean)
Author(s) -
M. Peyrot Clausade,
Nathalie Pari,
V. Chazottes
Publication year - 1999
Publication title -
bulletin of the geological society of denmark
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.674
H-Index - 28
eISSN - 2245-7070
pISSN - 0011-6297
DOI - 10.37570/bgsd-1998-45-20
Subject(s) - bioerosion , carbonate , oceanography , calcium carbonate , particulates , alkalinity , reef , coral reef , geology , coral , ecology , environmental science , biology , chemistry , organic chemistry
On coral reefs, products of bioerosion through the activity of micro- and macro-boring organisms and grazers are particulate and dissolved carbonate. The con-tribution to bioerosion of the major boring and grazing species was estimated on French Polynesia and the island La Réunion. The influence of bioerosion on the calcification/dissolution budget of reefal waters and on particulate calcium car-bonate fluxes was investigated. Studies on bioerosion were performed in order to assess: (a) eroding activity of grazers through the gut content analysis of echinoids and scarid parrot fish, (b) eroding activity of micro- and macroborers from ex-perimental substrates exposed for one year, and (c) role of sponges in total bioero-sion on reefal and experimental substrates. Calcification/dissolution budget was measured using the alkalinity anomaly technique, and particulate carbonate pro-duction was analysed from trapped sediments.