The significance of coral reefs as global carbon sinks— response to Greenhouse

Kinsey, D.W.; Hopley, David

doi:10.1016/0921-8181(91)90117-f

Cited by 47 publications

(45 citation statements)

References 12 publications

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“…This was undertaken by adapting published rates of coral reef community gross production for use in Torres Strait, based on site-specific ecological and morphological data. Gross production rates adapted to Torres Strait were then linked to mapped geomorphic zones following the approach pioneered by Kinsey and Hopley's (1991).…”

Section: Methodsmentioning

confidence: 99%

“…Brock et al, 2006;Gattuso et al, 1997;Yates and Halley, 2003), although empirical studies suggest calcification is reducing as a result of increase in sea surface temperature and partial pressure of CO 2 (Silverman et al, 2009). Kinsey and Hopley (1991) derived generalized gross production rates (G values) for intra-reef geomorphic zones in the GBR based on a combination of 3 absolute modes defined by Kinsey (1979). These modes spanned from 100% hard coral/algal coverage (10 G), to 100% sand and rubble cover (0.5 G), to 100% algal pavement (4 G).…”

Section: Hydrochemistry-derived Gross Caco 3 Production Ratesmentioning

confidence: 99%

“…Flood and Scoffin, 1978). proportional/weighted gross CaCO3 production rates (G) for each of the 6 reef types for the GBR based on Hopley's classification scheme (after Kinsey and Hopley, 1991).…”

Section: Hydrochemistry-derived Gross Caco 3 Production Ratesmentioning

confidence: 99%

“…Maps of the geomorphic zones which characterise coral reefs can also be used to provide an indication of the distribution, patterns and extent of different coral reef biological communities and to estimate reef growth, productivity or coral health across regions (Andréfouët et al, 2006;Hamylton et al, 2012). Scaling-up coral reef gross production and calcification rates has been undertaken at different spatial scales and levels of generalization by linearly extrapolating metabolism rates based on the areal extent of geomorphic and benthic community zones, from individual reef platforms (Ahmad and Neil, 1994;Ryan et al, 2001), to synoptic coral reef regions (Andréfouët and Payri, 2000;Brock et al, 2006;Kinsey and Hopley, 1991;Moses et al, 2009), to global estimates (Vecsei, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Estimates of the carbonate budget for an emergent reef in Torres Strait are described, extending the earlier studies of that reef (Hart and Kench, 2007). CaCO 3 productivity is extrapolated across the entire region adopting a regional census based approach (Vecsei, 2001(Vecsei, , 2004 and building on methods to scale-up the gross CaCO 3 production for the complete GBR reef system (Kinsey and Hopley, 1991) based on the geomorphic characteristics of these reef types (Hopley, 1982;Hopley et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Morphological characterisation of reef types in Torres Strait and an assessment of their carbonate production

Leon

Woodroffe

2013

Marine Geology

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Coral reefs represent major accumulations of calcium carbonate (CaCO3). The particularly labyrinthine network of reefs in Torres Strait, north of the Great Barrier Reef (GBR), has been examined in order to estimate their gross CaCO3 productivity. The approach involved a two-step procedure, first characterising and classifying the morphology of reefs based on a classification scheme widely employed on the GBR and then estimating gross CaCO3 productivity rates across the region using a regional census-based approach. This was undertaken by independently verifying published rates of coral reef community gross production for use in Torres Strait, based on site-specific ecological and morphological data. A total of 606 reef platforms were mapped and classified using classification trees. Despite the complexity of the maze of reefs in Torres Strait, there are broad morphological similarities with reefs in the GBR. The spatial distribution and dimensions of reef types across both regions are underpinned by similar geological processes, sea-level history in the Holocene and exposure to the same wind/wave energetic regime, resulting in comparable geomorphic zonation. However, the presence of strong tidal currents flowing through Torres Strait and the relatively shallow and narrow dimensions of the shelf exert a control on local morphology and spatial distribution of the reef platforms. A total amount of 8.7 million tonnes of CaCO3 per year, at an average rate of 3.7 kg CaCO3 m− 2 yr− 1 (G), were estimated for the studied area. Extrapolated production rates based on detailed and regional census-based approaches for geomorphic zones across Torres Strait were comparable to those reported elsewhere, particularly values for the GBR based on alkalinity-reduction methods. However, differences in mapping methodologies and the impact of reduced calcification due to global trends in coral reef ecological decline and changing oceanic physical conditions warrant further research. The novel method proposed in this study to characterise the geomorphology of reef types based on classification trees provides an objective and repeatable data-driven approach that combined with regional census-based approaches has the potential to be adapted and transferred to different coral reef regions, depicting a more accurate picture of interactions between reef ecology and geomorphology. been examined in order to estimate their gross CaCO 3 productivity. The approach involved a two-step procedure, first characterising and classifying the morphology of reefs based on a classification scheme widely employed on the GBR and then estimating gross CaCO 3 productivity rates across the region using a regional census-based approach. This was undertaken by independently verifying published rates of coral reef community gross production for use in Torres Strait, based on site-specific ecological and morphological data.A total of 606 reef platform were mapped and classified using classification trees. per year, at an average rate of 3.7 kg CaCO 3 m -2 ...

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Section: Methodsmentioning

confidence: 99%

Section: Hydrochemistry-derived Gross Caco 3 Production Ratesmentioning

confidence: 99%

Section: Hydrochemistry-derived Gross Caco 3 Production Ratesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphological characterisation of reef types in Torres Strait and an assessment of their carbonate production

Leon

Woodroffe

2013

Marine Geology

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Seasonal variations of seawater pCO₂ and sea‐air CO₂ fluxes in a fringing coral reef, northern South China Sea

Yan

Shi

et al. 2016

JGR Oceans

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Evidence based on four field surveys conducted between July 2009 and April 2011 indicates that both sea surface partial pressures of CO 2 (pCO 2 ) and sea-air CO 2 fluxes at Luhuitou fringing reef in Sanya, Hainan Island, northern South China Sea (SCS) are subject to significant seasonal variations. The diurnal variation of seawater pCO 2 ranges from 264 to 579 latm in summer, which is much larger than that in autumn (152-335 latm), in winter (84-260 latm), and in spring (114-228 latm). The sea-air CO 2 flux in summer (9.6 mmol CO 2 m 22 d 21 ) is also larger than that in other seasons (i.e.,3 mmol CO 2 m 22 d 21 in spring, 3.5 mmol CO 2 m 22 d 21 in autumn, and 2.7 mmol CO 2 m 22 d 21 in winter). The atmospheric pCO 2 in this reef shows small diurnal and seasonal variations. The integration of the time-series pCO 2 data shows that the reef area is a weak source of atmospheric CO 2 at 0.54 mol CO 2 m 22 yr 21 . Further analyses indicate that the seasonal variations of the surface seawater pCO 2 in Luhuitou fringing reef are mainly affected by seasonally-dependent biological metabolic processes (organic processe and inorganic process), and that the organic process play a more important role than the inorganic process. Seasonal sea surface temperature (SST) variations and hydrodynamic processes may also have some influence on seawater pCO 2 variation.

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Habitat‐specific biogenic production and erosion influences net framework and sediment coral reef carbonate budgets

Brown

Bender-Champ

Achlatis

et al. 2020

Limnology & Oceanography

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Carbonate budgets are increasingly being used as a key metric to establish reef condition. To better understand spatial variations in framework and sediment net carbonate budgets, we quantified biogenic carbonate production, erosion, and dissolution within and between five distinct geomorphological habitats of Heron Reef on the southern Great Barrier Reef. The protected reef slope had the greatest estimated net framework carbonate budget (22.6 kgCaCO 3 m −2 yr −1 AE 2.4 SE), driven by abundant, fast-growing acroporid corals coupled with low levels of macro-and micro-bioerosion. The estimate of the exposed reef slope was significantly lower due to localized damage from a single tropical cyclone that occurred 7 years prior to this study (9.7 kgCaCO 3 m −2 yr −1 AE 2.8 SE). Within the extensive lagoon, net framework carbonate budgets ranged from 0.24 kgCaCO 3 m −2 yr −1 (AE 0.1 SE) to 3.0 kgCaCO 3 m −2 yr −1 (AE 0.7 SE). The greatest net sediment carbonate budget was estimated within the reef crest (6.0 kgCaCO 3 m −2 yr −1 AE 1.1 SE) and the lowest in the shallow lagoon (1.2 kgCaCO 3 m −2 yr −1 AE 0.2 SE). Chemical dissolution of the sediments exhibited spatial variability, with reef crest and reef flat sediments in a state of net production. Considering the area of each habitat, the net reef framework and sediment budgets across Heron Reef were 4.06 kgCaCO 3 m −2 yr −1 and 2.82 kgCaCO 3 m −2 yr −1 , respectively. The results of this study improve our understanding of spatial variability in carbonate production and bioerosion and provide a comprehensive reef-scale carbonate budget for a relatively undisturbed coral reef ecosystem.

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The significance of coral reefs as global carbon sinks— response to Greenhouse

Cited by 47 publications

References 12 publications

Morphological characterisation of reef types in Torres Strait and an assessment of their carbonate production

Morphological characterisation of reef types in Torres Strait and an assessment of their carbonate production

Seasonal variations of seawater pCO₂ and sea‐air CO₂ fluxes in a fringing coral reef, northern South China Sea

Habitat‐specific biogenic production and erosion influences net framework and sediment coral reef carbonate budgets

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The significance of coral reefs as global carbon sinks— response to Greenhouse

Cited by 47 publications

References 12 publications

Morphological characterisation of reef types in Torres Strait and an assessment of their carbonate production

Morphological characterisation of reef types in Torres Strait and an assessment of their carbonate production

Seasonal variations of seawater pCO2 and sea‐air CO2 fluxes in a fringing coral reef, northern South China Sea

Habitat‐specific biogenic production and erosion influences net framework and sediment coral reef carbonate budgets

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Seasonal variations of seawater pCO₂ and sea‐air CO₂ fluxes in a fringing coral reef, northern South China Sea