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

scholarly journals Ocean Acidification Has Impacted Coral Growth on the Great Barrier Reef

2020 ◽  
Vol 47 (19) ◽  
Author(s):  
Weifu Guo ◽  
Rohit Bokade ◽  
Anne L. Cohen ◽  
Nathaniel R. Mollica ◽  
Muriel Leung ◽  
...  
Keyword(s):  
Great Barrier Reef ◽  
Ocean Acidification ◽  
Coral Growth ◽  
Barrier Reef

scholarly journals Progressive seawater acidification on the Great Barrier Reef continental shelf

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Katharina E. Fabricius ◽  
Craig Neill ◽  
Erik Van Ooijen ◽  
Joy N. Smith ◽  
Bronte Tilbrook
Keyword(s):  
Coral Reefs ◽  
Continental Shelf ◽  
Great Barrier Reef ◽  
Ocean Acidification ◽  
Seawater Temperature ◽  
Barrier Reef ◽  
Saturation State ◽  
Seawater Acidification ◽  
Seawater Ph ◽  
Seawater Samples

Abstract Coral reefs are highly sensitive to ocean acidification due to rising atmospheric CO2 concentrations. We present 10 years of data (2009–2019) on the long-term trends and sources of variation in the carbon chemistry from two fixed stations in the Australian Great Barrier Reef. Data from the subtropical mid-shelf GBRWIS comprised 3-h instrument records, and those from the tropical coastal NRSYON were monthly seawater samples. Both stations recorded significant variation in seawater CO2 fugacity (fCO2), attributable to seasonal, daytime, temperature and salinity fluctuations. Superimposed over this variation, fCO2 progressively increased by > 2.0 ± 0.3 µatm year−1 at both stations. Seawater temperature and salinity also increased throughout the decade, whereas seawater pH and the saturation state of aragonite declined. The decadal upward fCO2 trend remained significant in temperature- and salinity-normalised data. Indeed, annual fCO2 minima are now higher than estimated fCO2 maxima in the early 1960s, with mean fCO2 now ~ 28% higher than 60 years ago. Our data indicate that carbonate dissolution from the seafloor is currently unable to buffer the Great Barrier Reef against ocean acidification. This is of great concern for the thousands of coral reefs and other diverse marine ecosystems located in this vast continental shelf system.

Evidence for ocean acidification in the Great Barrier Reef of Australia

2009 ◽  
Vol 73 (8) ◽  
pp. 2332-2346 ◽  
Author(s):  
Gangjian Wei ◽  
Malcolm T. McCulloch ◽  
Graham Mortimer ◽  
Wengfeng Deng ◽  
Luhua Xie
Keyword(s):  
Great Barrier Reef ◽  
Ocean Acidification ◽  
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.

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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