气候变化领域集成服务门户(CCPortal): Mechanisms of spur and groove development and implications for reef platform evolution

CCPortal

DOI	10.1016/j.quascirev.2019.106155
	Mechanisms of spur and groove development and implications for reef platform evolution
	Duce S.; Dechnik B.; Webster J.M.; Hua Q.; Sadler J.; Webb G.E.; Nothdurft L.; Salas-Saavedra M.; Vila-Concejo A.
发表日期	2020
ISSN	0277-3791
卷号	231
英文摘要	Contemporary understanding of Holocene coral reef development is based primarily on sub-surface investigations of reef flat, back reef and lagoon zones. Few studies of Holocene fore reef development exist, constituting a significant gap in our understanding of reef evolution. The spur and groove (SaG) zone is a distinct, understudied, feature of fore reefs worldwide. We review SaG development from previous studies and present 29 new SaG short cores with 52 14C and U–Th ages from six fore reef regions of Heron and One Tree reefs, the first such data from the Great Barrier Reef. Remarkably, we found that SaGs do not necessarily accrete in the same direction as their adjacent reef flat. We identified three modes of reef flat and SaG lateral accretion: Mode 1 – lagoonward accretion of both the reef flat and SaGs; Mode 2 –lagoonward accretion of the reef flat but seaward accretion of the SaGs; Mode 3 - seaward accretion of both the reef flat and SaGs. Most SaG zones (five of the six studied) accreted in a seaward direction (Modes 2 or 3). Hydrodynamic conditions and local topography appear to be the dominant factors determining which mode occurs. Episodic high-energy events are also likely to play an important role in SaG formation. Our findings suggest that traditionally held models of reef evolution whereby lagoonal, mature reefs fill, developing into senile platform reefs, may not hold. Rather, reef flats may continue to expand seaward on their leeward, and semi-exposed fronts to increase in size while maintaining their lagoons. © 2019
英文关键词	Accretion; Coral reef geomorphology; Great barrier reef; Holocene; Reef growth; Spur and groove
语种	英语
scopus关键词	Topography; Trees (mathematics); Accretion; Coral reef; Great Barrier Reef; Holocenes; Reef growths; Spur and groove; Reefs; accretion; coastal evolution; coastal lagoon; coral reef; geomorphology; Holocene; uranium series dating; Australia; Coral Sea; Great Barrier Reef; Queensland; Anthozoa
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151576
作者单位	Centre for Tropical Environmental and Sustainability Studies, James Cook University, Townsville, QLD 4811, Australia; Department of Oceanography, Federal University of Espirito Santo, Vitoria, ES-CEP 29075-910, Brazil; Geocoastal Research Group, School of Geosciences, University of Sydney, Sydney, NSW 2006, Australia; Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia; School of Earth and Environmental Sciences, The University of Queensland, Brisbane, QLD 4072, Australia; School of Earth, Environmental and Biological Sciences, Queensland University of Technology, Brisbane, QLD 2000, Australia
推荐引用方式 GB/T 7714	Duce S.,Dechnik B.,Webster J.M.,et al. Mechanisms of spur and groove development and implications for reef platform evolution[J],2020,231.
APA	Duce S..,Dechnik B..,Webster J.M..,Hua Q..,Sadler J..,...&Vila-Concejo A..(2020).Mechanisms of spur and groove development and implications for reef platform evolution.Quaternary Science Reviews,231.
MLA	Duce S.,et al."Mechanisms of spur and groove development and implications for reef platform evolution".Quaternary Science Reviews 231(2020).