P
Peter J. Ralph
Researcher at University of Technology, Sydney
Publications - 335
Citations - 16657
Peter J. Ralph is an academic researcher from University of Technology, Sydney. The author has contributed to research in topics: Coral & Photosynthesis. The author has an hindex of 60, co-authored 317 publications receiving 13806 citations. Previous affiliations of Peter J. Ralph include Australian National University & University of Sydney.
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Journal ArticleDOI
Spatial heterogeneity of photosynthetic activity within diseased corals from the Great Barrier Reef
TL;DR: The results suggest that for the majority of coral syndromes from the GBR, pathogenesis occurs in the host tissue, while the impact on the zooxanthellae populations residing in affected corals is minimal.
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Ocean acidification and warming alter photosynthesis and calcification of the symbiont-bearing foraminifera Marginopora vertebralis
Sutinee Sinutok,Ross Hill,Ross Hill,Michael Kühl,Michael Kühl,Michael Kühl,Martina A. Doblin,Peter J. Ralph +7 more
TL;DR: Both calcification and photosynthesis of the major sediment-producing foraminifer M. vertebralis appears highly vulnerable to elevated temperature and ocean acidification scenarios predicted in climate-change models.
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Photosynthetic acclimation of Nannochloropsis oculata investigated by multi-wavelength chlorophyll fluorescence analysis.
Milán Szabó,Kieran Parker,Supriya Guruprasad,Unnikrishnan Kuzhiumparambil,Ross McC. Lilley,Bojan Tamburic,Martin Schliep,Anthony W. D. Larkum,Ulrich Schreiber,John A. Raven,Peter J. Ralph +10 more
TL;DR: Under these conditions, the HL cells accumulated saturated fatty acids, whereas polyunsaturated fatty acids were more abundant in LL cells, indicating preferential utilisation of blue-green light, a highly relevant spectral region for visible light in algal pond conditions.
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Thermal niche evolution of functional traits in a tropical marine phototroph
Kirralee G. Baker,Dale T. Radford,Christian R. Evenhuis,Unnikrishnan Kuzhiumparam,Peter J. Ralph,Martina A. Doblin +5 more
TL;DR: A number of potential trade‐offs associated with high‐temperature adaptation in a tropical microbial eukaryote, Amphidinium massartii (dinoflagellate), are demonstrated, most notably, the population became high-temperature specialized and had a greater nutrient requirement for carbon, nitrogen and phosphorus.
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Modeling photoinhibition-driven bleaching in Scleractinian coral as a function of light, temperature, and heterotrophy
TL;DR: The model was found to bleach under similar thermal stress regimes as field studies, except under elevated heterotrophic feeding conditions, which resulted in reduced severity of bleaching over a 90 d period.