Late Quaternary Deltaic and Carbonate Sedimentation in the Gulf of Papua Foreland Basin: Response to Sea-Level Change

Harris, Peter T.; Pattiaratchi, Charitha; Keene, J. B.; Dalrymple, Robert W.; Gardner, James V.; Baker, Elaine; Cole, A.R.; Mitchell, Danielle L.; Gibbs, Peter; Schroeder, William W.

doi:10.1306/d426840f-2b26-11d7-8648000102c1865d

Cited by 15 publications

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“…Halimeda is an important carbonate producer in the GBR, and upwelling associated with tidal flow through the narrow passages between the long, linear ribbon reefs results in the formation of large Halimeda banks leeward of the outer barrier in the northern GBR lagoon (Hopley et al 2007;McNeil et al 2016). Fields of Halimeda several kilometers across were recorded in depths of 50-75 meters at Yonge and Day Reefs in the northern GBR and off Viper Reef in the central GBR (Bridge et al 2011b;Englebert et al 2017), and Halimeda meadows have been observed at ~80 m depth in the Gulf of Papua (Harris et al 1996). The Halimeda fields in the central GBR, and potentially elsewhere, may be due to intrusions of cold, nutrient-rich water onto the continental shelf (Benthuysen et al 2016).…”

Section: Macroalgaementioning

confidence: 99%

The Great Barrier Reef and Coral Sea

Bridge

Beaman

Bongaerts

et al. 2019

Coral Reefs of the World

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The Coral Sea lies in the southwestern Pacific Ocean, bordered by Australia, Papua New Guinea, the Solomon Islands, Vanuatu, New Caledonia, and the Tasman Sea. The Great Barrier Reef (GBR) constitutes the western margin of the Coral Sea and supports extensive submerged reef systems in mesophotic depths. The majority of research on the GBR has focused on Scleractinian corals, although other taxa (e.g., fishes) are receiving increasing attention. To date, 192 coral species (44% of the GBR total) are recorded from mesophotic depths, most of which occur shallower than 60 m. East of the Australian continental margin, the Queensland Plateau contains many large, oceanic reefs. Due to their isolated location, Australia's Coral Sea reefs remain poorly studied; however, preliminary investigations have confirmed the presence of mesophotic coral ecosystems, and the clear, oligotrophic waters of the Coral Sea likely support extensive mesophotic reefs. Although mesophotic reefs in the GBR and Coral Sea are among the best-studied globally, most research has focused on only a few sites, and research effort dedicated to mesophotic coral ecosystems remains negligible compared to shallow-water reefs. Despite the lack of ecological data from most mesophotic reef habitats, precautionary man-agement approaches that explicitly considered latitudinal and cross-shelf gradients in the environment resulted in mesophotic reefs being well-represented in no-take areas in the GBR. In contrast, mesophotic reefs in the Coral Sea currently receive little protection.

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Section: Macroalgaementioning

confidence: 99%

The Great Barrier Reef and Coral Sea

Bridge

Beaman

Bongaerts

et al. 2019

Coral Reefs of the World

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Classification, Architecture, and Evolution of Large‐River Deltas

Hori

Saito

2007

Large Rivers

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Bathymetry and sediments on the carbonate platform off western India: Significance of Halimeda bioherms in carbonate sedimentation

2018

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Bathymetry across the carbonate platform off western India indicated small-size pinnacles and their lateral coalescence into 2-6-m high mounds landward, and linear elongated carbonate ridges and troughs, mounds and banks up to a height of 20-m seaward of the platform. Seismic data indicated that these mounds were transparent with no rigid internal structure and can be defined as bioherms. The sediments were abundantly aragonite faecal pellets, Halimeda grains and ooids and their radiocarbon ages ranged from 11 to 7.5 ka BP. It appears that the growth of Halimeda bioherms on the platform was facilitated by intense upwelling during the early Holocene. The terrigenous sediments brought by rivers were deposited in the inner shelf and have not affected the growth of bioherms. It is estimated that the platform comprises at least 1.85 Gt of mass CaCO 3 accumulated during the early Holocene and comparable to those on the Great Barrier Reef. Halimeda bioherms produce abundant carbonate sediments and their growth period represents a geological carbonate sink and release of high CO 2 to the atmosphere. Detailed shallow seismic studies and sediment cores are needed to quantify the exact mass content of CaCO 3 and model climate change during the early Holocene.

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Late Quaternary Deltaic and Carbonate Sedimentation in the Gulf of Papua Foreland Basin: Response to Sea-Level Change

Cited by 15 publications

References 0 publications

The Great Barrier Reef and Coral Sea

The Great Barrier Reef and Coral Sea

Classification, Architecture, and Evolution of Large‐River Deltas

Bathymetry and sediments on the carbonate platform off western India: Significance of Halimeda bioherms in carbonate sedimentation

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