The two variables discussed, which will contribute to the understanding of the global role of coral reefs, are : 1) remote sensing of submerged coral reefs in general; and 2) remote sensing of coral bleaching in particular. A summary of radiative
Les coraux construisent des squelettes calcaires qui gardent en mémoire les moindres variations du milieu. Les coraux fossiles fournissent ainsi de précieuses informations sur les climats passés. Leur étude a déjà montré que lors de la dernière
Frequentslope failures of the forereef dropoff occur in living coral reefs on the island of Bonaire in the southern Caribbean. Topographic profiles of 10 sites were taken perpendicular to shore, followed by an estimation of coral ages along
the topographic profiles. Comparisons of coral age and adjacent slope angle indicated that the steeper slopes are older and that mass failure of the slope reduces the steepness of the forereef front and destroys the coral community along the disturbed slope
Raised coral terraces at Malakula, Vanuatu, southwest Pacific, indicate high sea level during marine isotope stage 3
Coral reef ; Marine terrace ; Oxygen 18 ; Pacific Region ; Quaternary ; Sea level ; Th/U dating ; Tropical zone ; Vanuatu ; Vertical movement
The occurence of a series of raised coral reefs from the uplifted island of Malakula (Vanuatu, SW Pacific) provide an opportunity to examine sea-level fluctuations over at least the past 120,000 years. Thirteen fossil coral samples from Malakula
coral terraces in Papua New Guinea and the recent sea-level reconstruction from the deep-sea sedimentary δ O 18 records.
This review evaluates present and past rates of coral growth and net vertical accretion in relation to predicted, present and past rates of sea-level rise. It also considers potential constraints on future reef performance and the complexities
La réaction aux traumatismes: comparaison entre les arbres et les coraux
Observations and in situ experiments carried out between 1981 and 1983 near Pari Island, Seribu Archipelago, Java Sea, showed that reef-building corals can reiterate their specific colony architecture after being subjected to an environmental trauma
which irreversibly alters their characteristic appearance. Beside trees, many fixed colonial organisms such as hydroids, gorgonian, sponges and corals, display this process of architectural adjustment. Reiteration appears to be a fundamental
Nine samples of corals collected from seven locations in the Saurashtra Coastal region of India were dated by U series disequilibrium methods. Of the three age groups reported for this region by the earlier studies of S. K. Gupta and B. S. Amin
, the AA could confirm only the 6000 yr group. Instead of a 120,000 yr group, they found a scatter of ages between 118,000 and 176,000 yr. There appears to be no evidence for 30,000 yr-old corals from this region.
Interpreting features of carbonate geomorphology on Niue Island, a raised coral atoll
Carbonate ; Coral reef ; Geology ; Geomorphology ; Island ; Karst ; Karstic landform ; New Zealand ; Pacific Region
Dans le sud de l'océan Pacifique, l'île de Niue, essentiellement calcaire, est constituée par les coraux qui se sont développés depuis 500 000 ans sur un volcan sous-marin. Les AA. étudient le modelé karstique, son origine, ses caractéristiques et
Holocene emerged coral reef in Takarajima and Kodakarajima, Ryukyu islands, South West Japan
Détermination de l'âge, de la structure et de la croissance des coraux dans le NW du Pacifique (limite des coraux) d'après des observations sur le terrain et datations C14 sur profils dans les récifs émergés holocènes des îles Takarajima et
The coral reef terraces of Huon Peninsula in Papua New Guinea at 6°S range from the Holocene terrace I to the more than 300,000 years old terrace XI. Since the ages of the coral reefs are known, a chronosequence of the different pedogenetic