Phytoplankton dynamics in the central Great Barrier Reef—I. Seasonal changes in biomass and community structure and their relation to intrusive activity

Variations in Mid‐ to Late Holocene Nitrogen Supply to Northern Great Barrier Reef Halimeda Macroalgal Bioherms

“…However, bottom layer concentrations can reach at least 6 µmol L −1 during seasonal upwelling episodes (M. J. Furnas & Mitchell, 1986). This is consistent with previously measured NO 3…”

Variations in Mid‐ to Late Holocene Nitrogen Supply to Northern Great Barrier Reef Halimeda Macroalgal Bioherms

“…However, bottom layer concentrations can reach at least 6 µmol L −1 during seasonal upwelling episodes (M. J. Furnas & Mitchell, 1986). This is consistent with previously measured NO 3…”

Gene Content of Seawater Microbes is a Strong Predictor of Water Chemistry Across the Great Barrier Reef

“…The chemistry of GBR surface waters is characterised by a cluster of ve collinear physico-chemical variables (Chl-a, Phaeo, POC, PN and PP) and a weak collinearity of dissolved nutrients (DOC, NH 4 , NO 2 , NO 3 , PO 4 , and Si) consistently elevated by 10-50% during summer, and with the lowest nutrient concentrations typically observed during winter and early spring in August-September [36,81,82]. Largely consistent with published data, we observed that temperature and nutrient concentrations were consistently higher in austral summer than in winter, apart from TDP and PO 4 which were higher in austral winter potentially due to seasonal upwelling of nutrient-rich water from the Coral Sea into reefs on the outer continental shelf, via intrusive upwelling events that are documented to occur in the central GBR [83,84]. We also observed collinearity between particulate nutrients (POC, PN, and PP) and Chl-a (proxy of phytoplankton biomass), indicating that particulate nutrients (≥ 0.7 µm in diameter) in the studied microbial size fraction (0.2-5 µm) may originate from the picoplankton biomass (Fig.…”

Larval Starvation to Satiation: Influence of Nutrient Regime on the Success of Acanthaster planci

“…With respect to natural levels of chl a on the GBR, satellite data collected by eReefs ( http://www.bom.gov.au/marinewaterquality/ ) is congruent to that recorded in previous studies based on analyses by discrete water samples ( S1 Table ) [ 38 , 39 ]. Natural levels of chl a on the GBR were determined from reference data from eReefs for the time Acanthaster planci larvae would be expected in the plankton (five months; November-March).…”

Variations in Mid‐ to Late Holocene Nitrogen Supply to Northern Great Barrier Reef Halimeda Macroalgal Bioherms

“…However, bottom layer concentrations can reach at least 6 µmol L −1 during seasonal upwelling episodes (M. J. Furnas & Mitchell, 1986). This is consistent with previously measured NO 3…”

Gene Content of Seawater Microbes is a Strong Predictor of Water Chemistry Across the Great Barrier Reef

“…The chemistry of GBR surface waters is characterised by a cluster of ve collinear physico-chemical variables (Chl-a, Phaeo, POC, PN and PP) and a weak collinearity of dissolved nutrients (DOC, NH 4 , NO 2 , NO 3 , PO 4 , and Si) consistently elevated by 10-50% during summer, and with the lowest nutrient concentrations typically observed during winter and early spring in August-September [36,81,82]. Largely consistent with published data, we observed that temperature and nutrient concentrations were consistently higher in austral summer than in winter, apart from TDP and PO 4 which were higher in austral winter potentially due to seasonal upwelling of nutrient-rich water from the Coral Sea into reefs on the outer continental shelf, via intrusive upwelling events that are documented to occur in the central GBR [83,84]. We also observed collinearity between particulate nutrients (POC, PN, and PP) and Chl-a (proxy of phytoplankton biomass), indicating that particulate nutrients (≥ 0.7 µm in diameter) in the studied microbial size fraction (0.2-5 µm) may originate from the picoplankton biomass (Fig.…”

Larval Starvation to Satiation: Influence of Nutrient Regime on the Success of Acanthaster planci

“…With respect to natural levels of chl a on the GBR, satellite data collected by eReefs ( http://www.bom.gov.au/marinewaterquality/ ) is congruent to that recorded in previous studies based on analyses by discrete water samples ( S1 Table ) [ 38 , 39 ]. Natural levels of chl a on the GBR were determined from reference data from eReefs for the time Acanthaster planci larvae would be expected in the plankton (five months; November-March).…”

Variations in Mid‐ to Late Holocene Nitrogen Supply to Northern Great Barrier Reef Halimeda Macroalgal Bioherms

“…However, bottom layer concentrations can reach at least 6 µmol L −1 during seasonal upwelling episodes (M. J. Furnas & Mitchell, 1986). This is consistent with previously measured NO 3…”

Gene Content of Seawater Microbes is a Strong Predictor of Water Chemistry Across the Great Barrier Reef

“…The chemistry of GBR surface waters is characterised by a cluster of ve collinear physico-chemical variables (Chl-a, Phaeo, POC, PN and PP) and a weak collinearity of dissolved nutrients (DOC, NH 4 , NO 2 , NO 3 , PO 4 , and Si) consistently elevated by 10-50% during summer, and with the lowest nutrient concentrations typically observed during winter and early spring in August-September [36,81,82]. Largely consistent with published data, we observed that temperature and nutrient concentrations were consistently higher in austral summer than in winter, apart from TDP and PO 4 which were higher in austral winter potentially due to seasonal upwelling of nutrient-rich water from the Coral Sea into reefs on the outer continental shelf, via intrusive upwelling events that are documented to occur in the central GBR [83,84]. We also observed collinearity between particulate nutrients (POC, PN, and PP) and Chl-a (proxy of phytoplankton biomass), indicating that particulate nutrients (≥ 0.7 µm in diameter) in the studied microbial size fraction (0.2-5 µm) may originate from the picoplankton biomass (Fig.…”

Larval Starvation to Satiation: Influence of Nutrient Regime on the Success of Acanthaster planci

“…With respect to natural levels of chl a on the GBR, satellite data collected by eReefs ( http://www.bom.gov.au/marinewaterquality/ ) is congruent to that recorded in previous studies based on analyses by discrete water samples ( S1 Table ) [ 38 , 39 ]. Natural levels of chl a on the GBR were determined from reference data from eReefs for the time Acanthaster planci larvae would be expected in the plankton (five months; November-March).…”