Variation in deglacial coralgal assemblages and their paleoenvironmental significance: IODP Expedition 310, “Tahiti Sea Level”

Abbey, Elizabeth; Webster, Jody M.; Braga, Juan C.; Sugihara, Kaoru; Wallace, Carden C.; Iryu, Yasufumi; Potts, D. C.; Done, Terry; Camoin, Gilbert; Séard, Claire

doi:10.1016/j.gloplacha.2010.11.005

Cited by 52 publications

(58 citation statements)

References 59 publications

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“…The Holocene Puhia fringing reef exhibits a zonation with a landward Pocillopora and lagoonward Acropora coralgal assemblage. While both assemblages presumably occurred in shallow water (0 to 10 m), as additionally indicated by the commonly found thick crusts of P. onkodes , vermetids and Homotrema , the acroporid corals are characteristic of a more open setting and the pocilloporids of a somewhat more protected environment (Abbey et al ., ). The curious thick, vertically oriented coralline algal crusts in the Puhia cores are dominated by taxa that typically occur in poorly illuminated settings, which usually occur in deeper reef areas or in shaded habitats, such as crevices or caves.…”

Section: Discussionmentioning

confidence: 99%

“…It is not entirely clear why there is a Porites-dominated assemblage seaward of the Pocillopora-dominated assemblage, which is a zonation different from that observed in the overlying Holocene fringing reef. Porites is considered as being indicative of either deeper water or more turbid conditions (Abbey et al, 2011). Siliciclastic input was presumably somewhat greater in the more landward setting of core Puhia 1.…”

Section: Pleistocene Fringing Reef Developmentmentioning

confidence: 99%

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Holocene and Pleistocene fringing reef growth and the role of accommodation space and exposure to waves and currents (Bora Bora, Society Islands, French Polynesia)

Gischler

Hudson²,

Humblet

et al. 2018

Sedimentology

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Holocene fringing reef development around Bora Bora is controlled by variations in accommodation space (as a function of sea‐level and antecedent topography) and exposure to waves and currents. Subsidence ranged from 0 to 0·11 m kyr−1, and did not create significant accommodation space. A windward fringing reef started to grow 8·7 kyr bp, retrograded towards the coast over a Pleistocene fringing reef until ca 6·0 kyr bp, and then prograded towards the lagoon after sea‐level had reached its present level. The retrograding portion of the reef is dominated by corals, calcareous algae and microbialite frameworks; the prograding portion is largely detrital. The reef is up to 13·5 m thick and accreted vertically with an average rate of 3·12 m kyr−1. Lateral growth amounts to 13·3 m kyr−1. Reef corals are dominated by an inner Pocillopora assemblage and an outer Acropora assemblage. Both assemblages comprise thick crusts of coralline algae. Palaeobathymetry suggests deposition in 0 to 10 m depth. An underlying Pleistocene fringing reef formed during the sea‐level highstand of Marine Isotope Stage 5e, and is also characterized by the occurrence of corals, coralline algal crusts and microbialites. A previously investigated, leeward fringing reef started to form contemporaneously (8·78 kyr bp), but is thicker (up to 20 m) and solely prograded throughout the Holocene. A shallow Pocillopora assemblage and a deeper water Montipora assemblage were identified, but detrital facies dominate. At the Holocene reef base, only basalt was recovered. The Holocene windward–leeward differences are a consequence of less accommodation space on the eastern island side that eventually led to a more complex reef architecture. As a result of higher rates of exposure and flushing, the reef framework on the windward island side is more abundant and experienced stronger cementation. In the Pleistocene, the environmental conditions on the leeward island side were presumably unfavourable for fringing reef growth.

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Section: Discussionmentioning

confidence: 99%

Section: Pleistocene Fringing Reef Developmentmentioning

confidence: 99%

Holocene and Pleistocene fringing reef growth and the role of accommodation space and exposure to waves and currents (Bora Bora, Society Islands, French Polynesia)

Gischler

Hudson²,

Humblet

et al. 2018

Sedimentology

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“…The nature and environmental significance of the identified coralgal assemblages are described in detail in Abbey et al . () and Camoin et al . ().…”

Section: Last Deglacial Reef Sequencesmentioning

confidence: 97%

“…The lithology and the biological composition of the recovered reef sequences are based on detailed analyses of 264 core samples, digital core images and 180 thin sections. The environmental interpretation of coralgal communities and associated reef-dwelling organisms recovered in cores is based on the ecological distribution of their modern counterparts (Cabioch et al, 1999a;Montaggioni, 2005;Abbey et al, 2011). An accurate chronology of the reef development has been obtained through the radiometric dating of corals and coralline algal crusts (46 corals and 17 coralline algae; Camoin et al, 2012;Deschamps et al, 2012), and the reef development history is described in detail by Camoin et al (2012).…”

Section: Data Setmentioning

confidence: 99%

Impact of environmental parameters on coral reef development and drowning: Forward modelling of the last deglacial reefs from Tahiti (French Polynesia; IODP Expedition #310)

et al. 2013

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The sedimentological and chronological analysis of the last deglacial reef sequences of Tahiti (French Polynesia), drilled during the Integrated Ocean Drilling Program Expedition 310, provide a high‐resolution data set allowing a well‐constrained forward modelling study. This study represents the first attempt to model in three dimensions the coral reef development of Tahiti during the last deglacial sea‐level rise (23 000 to 6000 cal yr bp) using the software dionisos developed by IFP Energies nouvelles. It allows the testing of the reconstructed last deglacial sea‐level curve and the different environmental parameters (for example, wave energy and sediment fluxes) that could have influenced the reef development. These last deglacial reef sequences form two prominent ridges occurring seaward of the living barrier reef that consist of successive submerged reefs. These reefs have been prone to drowning because the window of maximum carbonate production rate is inhibited by high water turbidity (sediment supply from a nearby river), shallow depth of wave action and substrate availability. These factors, combined with rapid sea‐level rise, have driven the growth of retrograding reef pinnacles. Local factors (substratum nature, sediment supply and wave energy) were the main processes that induced the drowning of the inner ridge, whereas interplay of local and global factors (acceleration of the sea‐level rise) was responsible for the drowning of the outer ridge. This particular acceleration of sea‐level rise of 16 m between 14·6 ka and 14 ka bp corresponds to meltwater pulse 1A.

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“…; Abbey et al . ). The combination of paleoenvironmental interpretations of fossil reef communities and radioisotope dating is a key to reconstructing past sea levels (Fairbanks ; Chappell & Polach ; Cabioch et al .…”

Section: Introductionmentioning

confidence: 99%

An identification guide to some major Quaternary fossil reef‐building coral genera (Acropora, Isopora, Montipora, and Porites)

2014

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Fossil coral identification is essential for paleoenvironment and sea level reconstructions and in paleoecological and evolutionary studies. It follows the taxonomy of their modern analogues and therefore is based on the external skeleton macromorphology. However, for geologists examining outcrops or drill cores, identification largely relies on cross sections. The coral surface is usually obscured by encrusters or by sediments, or because corals are broken or eroded. It is therefore important to understand the relationship between the internal structure of corals and their surface morphology. We provide a comprehensive description of the internal structure of four common coral genera (Acropora, Isopora, Montipora, and Porites). This identification guide is addressed to reef geologists who wish to identify Quaternary reef corals at the generic level based on cross sections. The massive basal part of Acropora is composed of an interbranch space filled with a highly regular mesh‐like network of skeletal elements parallel and perpendicular to growth direction. Corallites have conspicuous dissepiments with a ladder‐like appearance in longitudinal section. Corallites of Isopora are structurally similar but they do not show the same differentiation into axial and radial corallites. Corallites are generally sinuous and the coenosteum is less regular. Montipora has smaller corallites which appear as tubes lined with spiny septa. The coenosteum is characterized by long rod‐like skeletal elements parallel to growth direction projecting upward at the colony surface to form spinules or larger ornementations. These vertical rods are connected laterally by short bar‐like skeletal elements. In Porites, the size of corallites is similar to Montipora but they are juxtaposed and completely filled with skeletal elements. Longitudinal cross sections display a dense network of corallites' skeletal components parallel and perpendicular to growth direction. This new taxonomic guide provides a useful reference material for those who attempt to identify reef‐building corals in the fossil record.

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Variation in deglacial coralgal assemblages and their paleoenvironmental significance: IODP Expedition 310, “Tahiti Sea Level”

Cited by 52 publications

References 59 publications

Holocene and Pleistocene fringing reef growth and the role of accommodation space and exposure to waves and currents (Bora Bora, Society Islands, French Polynesia)

Holocene and Pleistocene fringing reef growth and the role of accommodation space and exposure to waves and currents (Bora Bora, Society Islands, French Polynesia)

Impact of environmental parameters on coral reef development and drowning: Forward modelling of the last deglacial reefs from Tahiti (French Polynesia; IODP Expedition #310)

An identification guide to some major Quaternary fossil reef‐building coral genera (Acropora, Isopora, Montipora, and Porites)

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