CRYSTALLINE STRUCTURE AND DIAGENESIS OF HIGH AND LOW DENSITY BANDS IN PORITES CORAL SKELETONS, MYRMIDON REEF, GREAT BARRIER REEF, AUSTRALIA

2018 ◽  
Author(s):  
Kyle W. Fouke ◽  
◽  
Lauren G. Todorov ◽  
Lauren G. Todorov ◽  
Mayandi Sivaguru ◽  
...  
Keyword(s):  
Great Barrier Reef ◽  
Crystalline Structure ◽  
Low Density ◽  
Barrier Reef ◽  
Coral Skeletons ◽  
Porites Coral

scholarly journals Coral skeletons reveal the history of nitrogen cycling in the coastal Great Barrier Reef

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Dirk V. Erler ◽  
Hanieh Tohidi Farid ◽  
Thomas D. Glaze ◽  
Natasha L. Carlson-Perret ◽  
Janice M. Lough
Keyword(s):  
Great Barrier Reef ◽  
Nitrogen Cycling ◽  
Barrier Reef ◽  
Coral Skeletons ◽  
History Of

SURFACE OCEAN RADIOCARBON FROM A PORITES CORAL RECORD IN THE GREAT BARRIER REEF: 1945–2017

Radiocarbon ◽  
2021 ◽  
pp. 1-11
Author(s):  
Yang Wu ◽  
Stewart J Fallon ◽  
Neal E Cantin ◽  
Janice M Lough
Keyword(s):  
High Resolution ◽  
Great Barrier Reef ◽  
Ocean Dynamics ◽  
Barrier Reef ◽  
Reference Series ◽  
Surface Ocean ◽  
Porites Coral ◽  
Subsurface Ocean ◽  
Ocean Atmosphere

ABSTRACT We present a high-resolution seawater radiocarbon (Δ14C) record from a Porites coral collected from Masthead Island in the southern Great Barrier Reef (GBR) covering the years 1945–2017. The Δ14C values from 1945–1953 (pre-bomb era) averaged –49‰. As a result of bomb-produced 14C in the atmosphere, Δ14C values started to rise rapidly from 1959, levelled off at ∼131‰ in the late 1970s and gradually decreased to ∼40.3‰ by 2017 due to the decrease in the air-sea 14C gradient and the overturning of the 14C ocean reservoir (i.e., surface ocean to subsurface ocean; atmosphere to surface ocean). The Masthead Island record is in agreement with previous 14C coral records from the southern GBR. A comparison between surface ocean and atmospheric Δ14C suggests that, since 2010, the main reservoir of bomb-derived 14C has shifted from the atmosphere to the surface ocean, potentially resulting in reversed 14C flux in regions where the CO2 gradient is favorable. The high-resolution Masthead coral Δ14C sheds light on long-term variability in air-sea exchange and GBR regional ocean dynamics associated with climate change and in conjunction with the previous records provides a robust seawater 14C reference series to date other carbonate samples.

Oxygen isotope variation on a lagoonal platform reef, Heron island, Great Barrier Reef

1983 ◽  
Vol 34 (5) ◽  
pp. 813 ◽  
Author(s):  
PK Swart ◽  
AF Wilson ◽  
JS Jell
Keyword(s):  
Great Barrier Reef ◽  
Oxygen Isotope ◽  
Isotope Ratio ◽  
Full Range ◽  
Isotope Ratios ◽  
Barrier Reef ◽  
Oxygen Isotope Ratio ◽  
Coral Skeletons ◽  
Oxygen Isotope Ratios ◽  
Isotope Variation

A survey of temperature, salinity and oxygen isotope ratio was conducted on the reefal waters of a lagoonal platform reef, Heron Reef, situated near the southern end of the Great Barrier Reef. The oxygen isotope ratio of the water changed by nearly 2‰ during a 3-week period. Daily variations of 1.4‰ were detected. As the maximum oxygen isotope ratios occurred at low tide, during times of high temperature and high salinity, temperature-induced variation in oxygen isotope ratios of skeletal material was masked. Such a phenomenon can easily explain why previous workers have failed to detect the full range of oxygen isotope ratios in coral skeletons and other calcareous organisms.

scholarly journals Coral Skeletons Provide Historical Evidence of Phosphorus Runoff on the Great Barrier Reef

PLoS ONE ◽  
2013 ◽  
Vol 8 (9) ◽  
pp. e75663 ◽  
Author(s):  
Jennie Mallela ◽  
Stephen E. Lewis ◽  
Barry Croke
Keyword(s):  
Great Barrier Reef ◽  
Barrier Reef ◽  
Historical Evidence ◽  
Coral Skeletons ◽  
Phosphorus Runoff

scholarly journals Ten Ostreobium (Ulvophyceae) strains from Great Barrier Reef corals as a resource for algal endolith biology and genomics

2021 ◽  
Author(s):  
Marisa M Pasella ◽  
Ming-Fen Eileen Lee ◽  
Vaness R Marcelino ◽  
Anusuya Willis ◽  
Heroen Verbruggen
Keyword(s):  
Great Barrier Reef ◽  
Phenotypic Diversity ◽  
Phylogenetic Analyses ◽  
Genome Structure ◽  
Barrier Reef ◽  
Low Light ◽  
Protein Coding ◽  
Reef Corals ◽  
Coral Skeletons ◽  
Chloroplast Genomes

Ostreobium is a genus of siphonous green algae that lives as an endolith in carbonate substrates under extremely limited light conditions and has recently been gaining attention due to its roles in reef carbonate budgets and its association with reef corals. Knowledge about this genus remains fairly limited due to the scarcity of strains available for physiological studies. Here, we report on 10 strains of Ostreobium isolated from coral skeletons from the Great Barrier Reef. Phenotypic diversity showed differences in the gross morphology and in few structures. Phylogenetic analyses of the tufA and rbcL put the strains in the context of the lineages identified previously through environmental sequencing. The chloroplast genomes of our strains are all around 80k bp in length and show that genome structure is highly conserved, with only a few insertions (some containing putative protein-coding genes) differing between the strains. The addition of these strains from the Great Barrier Reef to our toolkit will help develop Ostreobium as a model species for endolithic growth, low-light photosynthesis and coral-algal associations.

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