The evolution of the Great Barrier Reef during the Last Interglacial Period

Dechnik, Belinda; Webster, Jody M.; Webb, Gregory E.; Nothdurft, Luke D.; Dutton, Andrea; Braga, Juan C.; Zhao, Jian‐xin; Duce, Stephanie; Sadler, James

doi:10.1016/j.gloplacha.2016.11.018

Cited by 36 publications

(55 citation statements)

References 100 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cumulative thickness for this phase is < 10 m (Fig. 7d) and is compatible with values estimated for Ribbon Reef 5 and Heron Island (Dechnik et al, 2017). Following this initial phase, a deepening-upward sequence occurs up to 132 ka (Fig.…”

Section: Communities Evolution and Synthetic Core Representationsupporting

confidence: 86%

“…8). Again, this sequence has also been identified in a similar time interval at One Tree Reef (southern GBR) and Stanley Reef (central GBR) (Dechnik et al, 2017). A lack of significant reef framework (< 30 %) characterises the stratigraphic sequence during this interval.…”

Section: Communities Evolution and Synthetic Core Representationmentioning

confidence: 52%

“…Based on a statistical analysis of the depth and environmental distribution of modern coral communities at One Tree Reef (GBR), Dechnik et al (2017) calibrated the palaeo-water depositional environments of six fossil coral assemblages (three in protected and three in exposed environments). This calibration was also based on quantitative measurements of crustose coralline algae thickness and vermetid gastropod abundance which are reliable palaeo-depth indicators, allowing for the depth intervals to be more accurately constrained.…”

Section: Depth Threshold Functionsmentioning

confidence: 99%

“…3) are informed by Dechnik et al (2017) before receiving maximum and minimum sedimentation rates corresponding to the sediment input boundary condition (Fig. 4).…”

Section: Sediment Exposurementioning

confidence: 99%

“…Then we present two realistic case studies to illustrate the model's capability. First, we simulate a Holocene shallowing-up fossil reef sequence representing a "catch-up" growth strategy observed in the Great Barrier Reef (Hopley et al, 2007;Dechnik et al, 2017) and estimate assemblage compositions and changes. The second case study simulates the long-term evolution (> 120 000 years) of an idealised reef sequence under the influence of sea-level change and subsidence, commonly observed on passive margins worldwide (Montaggioni, 2005;Woodroffe and Webster, 2014;Gischler, 2015).…”

mentioning

confidence: 99%

See 4 more Smart Citations

Exploring coral reef responses to millennial-scale climatic forcings: insights from the 1-D numerical tool pyReef-Core v1.0

et al. 2018

Self Cite

View full text Add to dashboard Cite

Abstract. Assemblages of corals characterise specific reef biozones and the environmental conditions that change spatially across a reef and with depth. Drill cores through fossil reefs record the time and depth distribution of assemblages, which captures a partial history of the vertical growth response of reefs to changing palaeoenvironmental conditions. The effects of environmental factors on reef growth are well understood on ecological timescales but are poorly constrained at centennial to geological timescales. pyReefCore is a stratigraphic forward model designed to solve the problem of unobservable environmental processes controlling vertical reef development by simulating the physical, biological and sedimentological processes that determine vertical assemblage changes in drill cores. It models the stratigraphic development of coral reefs at centennial to millennial timescales under environmental forcing conditions including accommodation (relative sea-level upward growth), oceanic variability (flow speed, nutrients, pH and temperature), sediment input and tectonics. It also simulates competitive coral assemblage interactions using the generalised Lotka-Volterra system of equations (GLVEs) and can be used to infer the influence of environmental conditions on the zonation and vertical accretion and stratigraphic succession of coral assemblages over decadal timescales and greater. The tool can quantitatively test carbonate platform development under the influence of ecological and environmental processes and efficiently interpret vertical growth and karstification patterns observed in drill cores. We provide two realistic case studies illustrating the basic capabilities of the model and use it to reconstruct (1) the Holocene history (from 8500 years to present) of coral community responses to environmental changes and (2) the evolution of an idealised coral reef core since the last interglacial (from 140 000 years to present) under the influence of sea-level change, subsidence and karstification. We find that the model reproduces the details of the formation of existing coral reef stratigraphic sequences both in terms of assemblages succession, accretion rates and depositional thicknesses. It can be applied to estimate the impact of changing environmental conditions on growth rates and patterns under many different settings and initial conditions.

show abstract

Section: Communities Evolution and Synthetic Core Representationsupporting

confidence: 86%

Section: Communities Evolution and Synthetic Core Representationmentioning

confidence: 52%

Section: Depth Threshold Functionsmentioning

confidence: 99%

“…3) are informed by Dechnik et al (2017) before receiving maximum and minimum sedimentation rates corresponding to the sediment input boundary condition (Fig. 4).…”

Section: Sediment Exposurementioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Exploring coral reef responses to millennial-scale climatic forcings: insights from the 1-D numerical tool pyReef-Core v1.0

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

High‐resolution hyperspectral imaging of diagenesis and clays in fossil coral reef material: a nondestructive tool for improving environmental and climate reconstructions

Murphy

Webster

Nothdurft

et al. 2017

Geochem Geophys Geosyst

View full text Add to dashboard Cite

Hyperspectral imagery (1000–2500 nm) was used to quantitatively map carbonate and clay minerals in fossil reef cores that are relevant to accurately reconstructing past environmental and climatic conditions. Techniques were developed using hyperspectral imagery of fossil reef corals and cores acquired from three different geological settings, and were validated against independent measures of calcite to aragonite ratios. Aragonite, calcite, and dolomite were distinguished using a combination of the wavelength position and asymmetry of the primary carbonate absorption between 2300 and 2350 nm. Areas of core containing small amounts of calcite (>2–5%) were distinguished from aragonite in imagery of two cores, enabling quantitative maps of these minerals to be constructed. Dolomite was found to be the dominant mineral in another core. Trace amounts of the aluminium‐rich clay mineral kaolinite were detected, quantified, and mapped in one core using its diagnostic absorption feature near 2200 nm. The amounts of clay detected from hyperspectral imagery were below the limits of detection by standard X‐ray diffraction techniques but its presence was confirmed by Fourier Transform Infrared Spectroscopy. Hyperspectral imagery acquired at high spatial resolution simplifies vetting procedures for secondary carbonate minerals in coral reef cores, significantly reduces sampling time and costs, and is a powerful nondestructive tool to identify well‐preserved coral aragonite in cores for uses in paleoclimate, paleoenvironment and paleoecosystem reconstruction.

show abstract

Statistical approach on mixed carbonate-siliciclastic sediments of the NE Brazilian outer shelf

Silva

Gomes

2019

Geo-Mar Lett

View full text Add to dashboard Cite

The evolution of the Great Barrier Reef during the Last Interglacial Period

Abstract: 2017-08-30T02:06:33

Cited by 36 publications

References 100 publications

Exploring coral reef responses to millennial-scale climatic forcings: insights from the 1-D numerical tool pyReef-Core v1.0

Exploring coral reef responses to millennial-scale climatic forcings: insights from the 1-D numerical tool pyReef-Core v1.0

High‐resolution hyperspectral imaging of diagenesis and clays in fossil coral reef material: a nondestructive tool for improving environmental and climate reconstructions

Statistical approach on mixed carbonate-siliciclastic sediments of the NE Brazilian outer shelf

Contact Info

Product

Resources

About