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Response of reef coral communities to sea-level rise: a Holocene model from Mauritius (Western Indian Ocean) (1997)

MONTAGGIONI, LUCIEN F. ; FAURE, GÉRARD

Oxford, UK : Blackwell Publishing Ltd

Sedimentology 44 (1997), S. 0

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ISSN: 1365-3091

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Geosciences

Notes: The fringing reef at Pointe-au-Sable (Mauritius, Indian Ocean) was used to examine the effects of Holocene sea-level rise on coral growth. This reef is about 1000 m wide and comprises a forereef slope (30 m maximum depth), a narrow reef crest and a very shallow backreef (1·5 m maximum depth).Four major coral communities were recognized, which developed within relatively narrow depth ranges: a Pachyseris/Oulophyllia community (deeper than 20 m), an Acropora‘tabulate’Faviid community (20–6 m); a robust branching Acropora community (less than 6 m) and a Pavona community (less than 10m). Three high-recovery cores show the Holocene reef sequence is a maximum of 19·3 m thick and comprises four coral biofacies which are similar to counterparts identified in modern communities: robust branching, tabular-branching, robust branching-domal and foliaceous coral facies.A minimum sea-level curve for the past 7500 years was constructed. Using distribution patterns of coral biofacies and radiocarbon dates from corals, reconstruction of reef growth history indicates that both offshore and onshore reef zones were developing coevally, aggrading at rates of 4·3 mm year−1 from 6900 years B.P. The reef caught up with sea-level only after sea-level stabilized. Changes in coral community and reef growth rates were driven principally by increasing water agitation due to the decrease in accommodation space. Based on the composition of the successive coral assemblages, the reef appears to have grown through successive equilibrium stages.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-3091.1997.tb02178.x

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Deglacial sea-level record from Tahiti corals and the timing of global meltwater discharge (1996)

Bard, Edouard ; Hamelin, Bruno ; Arnold, Maurice ; [et al.]

[s.l.] : Nature Publishing Group

Nature 382 (1996), S. 241-244

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ISSN: 1476-4687

Source: Nature Archives 1869 - 2009

Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics

Notes: [Auszug] The Barbados sea-level record8'9'17'18 suggested that the last deglaciation was characterized by two brief periods of accelerated melting superimposed on a smooth and continuous rise of sea level with no reversals. These so-called MWP-1A and MWP-1B events (14,000 and 11,300 calendar years BP, ...