Veron, Lyndon M. Green, Stuart Kininmonth, M. Stafford-Smith et al. Sexual Reproduction of Scleractinian Corals. Coral Calcification, Cells to Reefs. Jaap A. Kaandorp, Maxim Filatov, Nol Chindapol. Physiological Adaptation to Symbiosis in Cnidarians. Biogeochemistry of Nutrients. The Role of Plankton in Coral Trophodynamics.
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Coral Reef Algae. Nanette E. Chadwick, Kathleen M. Coral Bleaching: Causes and Mechanisms. Reef Bioerosion: Agents and Processes. Microbial Diseases of Corals: Pathology and Ecology. Coral Reef Diseases in the Atlantic-Caribbean. Back Matter Pages However, once accommodation space is near filled and reefs become semi-emergent, increased tidal exposure, solar irradiance, and wave energy restrict coral assemblages to low-profile and slow-calcifying genera e.
These patterns are likely transferable across other low-impacted sites within the wider nearshore zone of the Great Barrier Reef where similar descriptions of ecological community types have been reported Browne et al. Direct parallels between coral assemblages and reef accretion are evident within our core records.
However, secondary extrinsic factors must also be considered. As reefs move toward sea level throughout maturity, they increasingly interact with wave base.
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Reef surface hydrodynamics increases the redistribution and export of fine terrigenous sediment from the reef framework Browne et al. Therefore, in addition to depth-variable changes in coral cover and taxa, reef preservation will also likely vary across similar environmental gradients because of differences in external forces in relation to sea level. In contrast, shallow material associated with low coral cover and greater sediment export through increased hydrodynamic activity as the reef shallows will be less well preserved.
These interacting factors compound changes in coral community structure to ultimately influence net accretion rates and vertical reef growth. Nearshore areas are clearly capable of supporting high coral cover that is acclimated to low-light and high-sedimentation conditions Browne et al.
Reef start-up within PSRC occurred between and cal. Lewis et al. Based on the temporal context of reef start-up, and given the strong depth limitations on nearshore reef growth, it is likely that this lower sea level dramatically increased light penetration to the seafloor, i. The winnowing of fine seafloor sediment as wave base was translated further seaward would have exposed new initiation substrates e.
Past histories of reef development are a well-recognized and fundamental control on contemporary ecological communities because they underpin habitat availability and local environmental conditions e. Here we show that despite inhabiting marginal coastal environments, nearshore reefs experience similar intrinsic controls on reef initiation and vertical growth albeit over a vertically compressed depth range to those in traditional clear-water settings.
We recognize a strong two-way feedback where reef growth and the position of reefs below sea level govern the abundance and diversity of coral taxa as well as sediment export and reef disassembly. These in turn influence rates of vertical accretion and reef structural complexity as reefs mature. These findings, derived from detailed core and ecological data sets, have implications for determining the trajectories of nearshore reefs, as although natural depth-related changes in ecology are expected, disruptions from other external pressures e.
The intrinsic mechanisms of reef growth and change under high terrigenous sediment influence provide an insight into natural long-term ecological dynamics coral cover and coral genera abundance and distribution of highly turbid nearshore reefs, and support recent suggestions that nearshore reefs may act as important refugia from climate-related bleaching events Cacciapaglia and van Woesik, We acknowledge the helpful comments of three anonymous reviewers. Approximate core locations are shown for each reef site.
Age-depth profiles from 31 cores radiocarbon dates collected across Paluma Shoals reef complex, Great Barrier Reef, Australia. Shaded zones correspond to depth-variable contemporary coral assemblages reported for these reefs: zone A-1 photo A ; zone A-2 photo B ; zone A-3 photo C ; zone A-4 photo D.
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Maximum, minimum, and mean accretion values are presented. B: Mean standard deviation accretion rates at core depths below lowest astronomical tide LAT. Alternately shaded zones with mean accretion rates correspond to depth-variable contemporary coral assemblages zones A-1 to A-4; see Figs.
Sign In or Create an Account. User Tools. Sign In. Advanced Search. Article Navigation. Research Article December 01, Transitions in coral reef accretion rates linked to intrinsic ecological shifts on turbid-zone nearshore reefs Kyle M. Morgan Kyle M. Google Scholar. Chris T. Perry Chris T.
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Scott G. Smithers Scott G. Jamie A. Johnson Jamie A. Pauline Gulliver Pauline Gulliver. Geology 44 12 : Article history received:. Figure 1. View large Download slide. Volume 44, Number Previous Article Next Article. View Full GeoRef Record. Shifting roles of heterotrophy and autotrophy in coral energetics under varying turbidity. Search ADS. Geomorphology and community structure of Middle Reef, central Great Barrier Reef, Australia: An inner-shelf turbid zone reef subject to episodic mortality events.
Carbonate and terrigenous sediment budgets for two inshore turbid reefs on the central Great Barrier Reef. Spatial and temporal variations in turbidity on two inshore turbid reefs on the Great Barrier Reef, Australia.
Water quality as a regional driver of coral biodiversity and macroalgae on the Great Barrier Reef. Rapid relative sea-level fall along north-eastern Australia between and cal. Evidence of extensive reef development and high coral cover in nearshore environments: Implications for understanding coral adaptation in turbid settings.
Internal structure and accretionary history of a nearshore, turbid-zone coral reef: Paluma Shoals, central Great Barrier Reef, Australia.