Coralline algae indicate Pleistocene evolution from deep, open platform to outer barrier reef environments in the northern Great Barrier Reef margin

Coral Reefs ◽  
2004 ◽  
Author(s):  
Juan C. Braga ◽  
Julio Aguirre
Keyword(s):  
Great Barrier Reef ◽  
Coralline Algae ◽  
Barrier Reef ◽  
Open Platform ◽  
Reef Environments

scholarly journals Cross-shelf distribution patterns of tropical juvenile cephalopods sampled with light-traps

1995 ◽  
Vol 46 (4) ◽  
pp. 707 ◽  
Author(s):  
NA Moltschaniwskyj ◽  
PJ Doherty
Keyword(s):  
Great Barrier Reef ◽  
Distribution Patterns ◽  
Present Knowledge ◽  
Outer Shelf ◽  
Barrier Reef ◽  
Light Traps ◽  
Coral Sea ◽  
Reef Environments ◽  
High Concentrations ◽  
Abundant Genus

This paper describes the cephalopod genera caught with light-traps at different locations and depths in the waters of the central Great Barrier Reef (GBR). Multiple stations were sampled in four locations: (I) the coastal GBR Lagoon, (2) inter-reef passages (Magnetic and Palm), (3) near-reef environments (Keeper, Helix, Faraday and Myrmidon) ranging from mid- to outer-shelf locations, and (4) the Coral Sea. A total of 13 cephalopod genera was caught from monthly cruises conducted from October to January of 1990-91 and 1991-92. Octopus, the most abundant juvenile cephalopod, was present in relatively high numbers at all shelf locations; few were caught in the Coral Sea. Photololigo, the most abundant squid, was rarely caught outside the GBR Lagoon. In contrast, Sthenoteuthis, the second most abundant squid, was caught at all locations. Deep samples from most locations were dominated by Octopus. Abralia was found only near the bottom of the GBR Lagoon; in contrast, Euprymna, the fourth most abundant genus, was collected only at the surface. Cephalopod communities from the GBR Lagoon had higher abundances of Octopus, Photololigo and Abralia compared with communities from the three other areas. Reef passages and reef locations shared similar communities, with the squid component dominated by Sthenoteuthis. Very low numbers of cephalopods were caught in the Coral Sea by light attraction. High concentrations of cephalopods detected in the middle of the GBR Lagoon are consistent with present knowledge about oceanographic processes over this shelf.

Radiocarbon ages from the northern Great Barrier Reef

1978 ◽  
Vol 291 (1378) ◽  
pp. 139-158 ◽  
Keyword(s):  
Great Barrier Reef ◽  
Sea Level ◽  
Time Scale ◽  
Radiocarbon Dating ◽  
Barrier Reef ◽  
Laboratory Methods ◽  
Reef Environments ◽  
History Of ◽  
Reef Islands ◽  
Radiometric Ages

The aims of the 1973 Great Barrier Reef Expedition’s radiocarbon dating programmes were: (i) to collect live specimens from various reef environments to serve as modern reference standards; (ii) to evaluate the suitability of materials from the drilling, geomorphic and sediment programmes for dating purposes; and (iii) to date appropriate samples related to those programmes. The radiometric ages provide a time scale for the evolution of reefs and reef islands, and the history of sea level in the area. The purpose of this paper is to report results of all ages determined to date, to describe field and laboratory methods used and to assess the reliability of the ages in terms of (i) the actual materials dated and (ii) the geomorphic, ecological or stratigraphic units from which the samples were obtained. Seventy-nine determinations based on 74 samples are reported. No interpretation of the results is attempted here.

Shifts in coralline algae, macroalgae, and coral juveniles in the Great Barrier Reef associated with present‐day ocean acidification

2020 ◽  
Vol 26 (4) ◽  
pp. 2149-2160 ◽  
Author(s):  
Joy N. Smith ◽  
Mathieu Mongin ◽  
Angus Thompson ◽  
Michelle J. Jonker ◽  
Glenn De'ath ◽  
...  
Keyword(s):  
Great Barrier Reef ◽  
Ocean Acidification ◽  
Coralline Algae ◽  
Barrier Reef

Distribution, abundance and diversity of crustose coralline algae on the Great Barrier Reef

Coral Reefs ◽  
2015 ◽  
Vol 34 (2) ◽  
pp. 581-594 ◽  
Author(s):  
Angela J. Dean ◽  
Robert S. Steneck ◽  
Danika Tager ◽  
John M. Pandolfi
Keyword(s):  
Great Barrier Reef ◽  
Coralline Algae ◽  
Barrier Reef ◽  
Crustose Coralline Algae ◽  
Abundance And Diversity

Exposed limestones of the Northern Province of the Great Barrier Reef

1978 ◽  
Vol 291 (1378) ◽  
pp. 119-138 ◽  
Keyword(s):  
Great Barrier Reef ◽  
Phosphate Rock ◽  
Thin Layers ◽  
Coralline Algae ◽  
Northern Province ◽  
Barrier Reef ◽  
Inner Shelf ◽  
Beach Rock

The exposed reef limestones occur principally on the inner-shelf reefs and can be separated into two groups — organically cemented (reef-rock) and inorganically cemented (beach-rock, rampart-rock, boulder-rock and phosphate-rock). No examples were found of exposed sub tidal reef framework; the reef-rock exposed is entirely of intertidal origin resulting from incipient encrustration by intertidal corals and coralline algae. Most of the beach-rock, rampart-rock and boulder-rock exposures are intertidal and many show vadose cement fabrics. The cements, chiefly aragonite needles in beach-rock and cryptocrystalline high Mg calcite in ram part and boulderrocks, are thought to be derived from seawater, though the environments of precipitation on windward sides of reefs where rampart-rocks form are quite different from those on the leeward sides where beach-rocks form. Phosphate-rock develops supratidally on the surface of some sand cays. Solutions derived from guano precipitate thin layers of phosphatic cement which bring about the centripetal replacement of carbonate grains.

scholarly journals ANU Radiocarbon Date List VIII

Radiocarbon ◽  
1981 ◽  
Vol 23 (1) ◽  
pp. 1-13 ◽  
Author(s):  
H A Polach ◽  
R F McLean ◽  
B G Thom ◽  
D R Stoddart ◽  
David Hopley ◽  
...  
Keyword(s):  
Great Barrier Reef ◽  
Sea Level ◽  
Time Scale ◽  
Radiocarbon Dating ◽  
Radiocarbon Date ◽  
Barrier Reef ◽  
Reef Environments ◽  
History Of ◽  
Reef Islands ◽  
Radiometric Ages

The aims of the 1973 Great Barrier Reef Expedition's radiocarbon dating programs were: 1) to collect live specimens from various reef environments to serve as modern reference standards, 2) to evaluate suitability of materials from drilling, geomorphic, and sediment programs for dating purposes, and 3) to date appropriate samples related to those programs. Radiometric ages provide a time scale for evolution of reefs and reef islands, and the history of sea level in the area.

Determining background levels and defining outbreaks of crustose coralline algae disease on the Great Barrier Reef

2013 ◽  
Vol 64 (11) ◽  
pp. 1022 ◽  
Author(s):  
I. R. Miller ◽  
M. Logan ◽  
K. A. Johns ◽  
M. J. Jonker ◽  
K. Osborne ◽  
...  
Keyword(s):  
Great Barrier Reef ◽  
Vital Role ◽  
Coralline Algae ◽  
Barrier Reef ◽  
Crustose Coralline Algae ◽  
Background Levels ◽  
White Band ◽  
High Incidence ◽  
Coral Reef Ecosystems ◽  
Anthropogenic Threats

Crustose coralline algae (CCA) play a vital role in coral-reef ecosystems and, like other marine organisms, they are vulnerable to disease. Between 2006 and 2011, incidence of two types of CCA disease was systematically recorded over a large portion of the Great Barrier Reef (GBR). The two CCA diseases that were recorded, coralline lethal orange disease and coralline white-band syndrome, were ubiquitous on the GBR, but generally at low levels comparable to those found on reefs in other parts of the Indo-Pacific. The present broad-scale study of the distribution and abundance of CCA disease on the GBR provides information on background levels of these diseases and allows regional thresholds for outbreaks to be defined. This will allow managers and researchers to focus attention on areas of high incidence of CCA disease to increase our understanding of causes and the environmental impacts of CCA disease at a time when coral reefs are under growing anthropogenic threats.

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