Publications about Great Barrier Reef

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Photosynthetic responses of the coral Montipora digitata to cold temperature stress (Page 1)

Photosynthetic responses of the coral Montipora digitata to cold temperature stress

Saxby TA, Dennison WC, and Hoegh-Guldberg O ·
2003

Coral bleaching events have become more frequent and widespread, largely due to elevated sea surface temperatures. Global climate change could lead to increased variability of sea surface temperatures, through influences on climate systems, e.g. El Nino Southern Oscillation (ENSO). Field observations in 1999, following a strong ENSO, revealed that corals bleached in winter after unusually cold weather.

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Spatial distribution of benthic microalgae on coral reefs determined by remote sensing (Page 1)

Spatial distribution of benthic microalgae on coral reefs determined by remote sensing

Roelfsema CM, Phinn SR, and Dennison WC ·
2002

Understanding the ecological role of benthic microalgae, a highly productive component of coral reef ecosystems, requires information on their spatial distribution. The spatial extent of benthic microalgae on Heron Reef (southern Great Barrier Reef, Australia) was mapped using data from the Landsat 5 Thematic Mapper sensor. integrated with field measurements of sediment chlorophyll concentration and reflectance. Field-measured sediment chlorophyll concentrations.

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Testing the sediment-trapping paradigm of seagrass: do seagrasses influence nutrient status and sediment structure in tropical intertidal environments? (Page 1)

Testing the sediment-trapping paradigm of seagrass: do seagrasses influence nutrient status and sediment structure in tropical intertidal environments?

Mellors J, Marsh H, Carruthers TJB, and Waycott M ·
2002

Seagrass meadows are considered important for sediment trapping and sediment stabilisation. Deposition of fine sediments and associated adsorbed nutrients is considered an important part of the chemical and biological processes attributed to seagrass communities. This paradigm was based on work in temperate regions on Zostera marina and in tropical regions on Thalassia testudinum, two species that maintain relatively high biomass, stable meadows.

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ENCORE: The effect of nutrient enrichment on coral reefs. Synthesis of results and conclusions (Page 1)

ENCORE: The effect of nutrient enrichment on coral reefs. Synthesis of results and conclusions

Koop K, Booth D, Broadbent A, Brodie J, Bucher D, Capone D, Coll J, Dennison WC, Erdmann M, Harrison P, Hoegh-Guldberg O, Hutchings P, Jones GB, Larkum AWD, O'Neil JM, Steven A, Tentori E, Ward S, Williamson J, and Yellowlees D ·
2001

Coral reef degradation resulting from nutrient enrichment of coastal waters is of increasing global concern. Although effects of nutrients on coral reef organisms have been demonstrated in the laboratory, there is little direct evidence of nutrient effects on coral reef biota in situ.

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Responses of seagrass to nutrients in the Great Barrier Reef, Australia (Page 1)

Responses of seagrass to nutrients in the Great Barrier Reef, Australia

Udy JW, Dennison WC, Long WJL, and McKenzie LJ ·
1999

Declines in seagrass biomass and growth have been widely reported in response to anthropogenic impacts. In contrast, the distribution and biomass of seagrass in the carbonate sediment around Green Island reef, part of Australia's Great Barrier Reef (GBR), has measurably increased during the past 50 yr, possibly due to increases in the availability of nutrients from local and regional anthropogenic sources.

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Photosynthetic capacity in coral reef systems: Investigations into ecological applications for the underwater PAM fluorometer (Page 1)

Photosynthetic capacity in coral reef systems: Investigations into ecological applications for the underwater PAM fluorometer

Jones AB and Dennison WC ·
1998

A submersible pulse amplitude modulated (PAM) fluorometer was used to determine the effects of desiccation, ultraviolet radiation, changes in solar radiation and nutrient availability on the photosynthetic apparatus of a variety of marine plants (zooxanthellae, benthic microalgae and macroalgae) at Heron Island, Great Barrier Reef, Australia. The PAM measures photosynthesis as irradiance-dependent photosystem II electron transport.

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