Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission.
Trichodesmium, a filamentous bloom-forming marine cyanobacterium, plays a key role in the biogeochemistry of oligotrophic ocean regions because of the ability to fix nitrogen. Naturally occurring in the Great Barrier Reef (GBR), the contribution of Trichodesmium to the nutrient budget may be of the...
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ftdoajarticles:oai:doaj.org/article:8e3ed971d008469bbfae61273bc0e9f0 2023-05-15T17:37:59+02:00 Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission. David Blondeau-Patissier Vittorio Ernesto Brando Christian Lønborg Susannah M Leahy Arnold G Dekker 2018-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0208010 https://doaj.org/article/8e3ed971d008469bbfae61273bc0e9f0 EN eng Public Library of Science (PLoS) https://doi.org/10.1371/journal.pone.0208010 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0208010 https://doaj.org/article/8e3ed971d008469bbfae61273bc0e9f0 PLoS ONE, Vol 13, Iss 12, p e0208010 (2018) Medicine R Science Q article 2018 ftdoajarticles https://doi.org/10.1371/journal.pone.0208010 2022-12-31T07:06:28Z Trichodesmium, a filamentous bloom-forming marine cyanobacterium, plays a key role in the biogeochemistry of oligotrophic ocean regions because of the ability to fix nitrogen. Naturally occurring in the Great Barrier Reef (GBR), the contribution of Trichodesmium to the nutrient budget may be of the same order as that entering the system via catchment runoff. However, the cyclicity of Trichodesmium in the GBR is poorly understood and sparsely documented because of the lack of sufficient observations. This study provides the first systematic analysis of Trichodesmium spatial and temporal occurrences in the GBR over the decade-long MERIS ocean color mission (2002-2012). Trichodesmium surface expressions were detected using the Maximum Chlorophyll Index (MCI) applied to MERIS satellite imagery of the GBR lagoonal waters. The MCI performed well (76%), albeit tested on a limited set of images (N = 25) coincident with field measurements. A north (Cape York) to south (Fitzroy) increase in the extent, frequency and timing of the surface expressions characterized the GBR, with surface expressions extending over several hundreds of kilometers. The two southernmost subregions Mackay and Fitzroy accounted for the most (70%) bloom events. The bloom timing of Trichodesmium varied from May in the north to November in the south, with wet season conditions less favorable to Trichodesmium aggregations. MODIS-Aqua Sea Surface Temperature (SST) datasets, wind speed and field measurements of nutrient concentrations were used in combination with MCI positive instances to assess the blooms' driving factors. Low wind speed (<6 m.s-1) and SST > 24°C were associated with the largest surface aggregations. Generalized additive models (GAM) indicated an increase in bloom occurrences over the 10-year period with seasonal bloom patterns regionally distinct. Interannual variability in SST partially (14%) explained bloom occurrences, and other drivers, such as the subregion and the nutrient budget, likely regulate Trichodesmium surface ... Article in Journal/Newspaper North Cape Directory of Open Access Journals: DOAJ Articles North Cape ENVELOPE(165.700,165.700,-70.650,-70.650) Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) Mackay ENVELOPE(168.517,168.517,-77.700,-77.700) Cape York ENVELOPE(-87.000,-87.000,73.801,73.801) Fitzroy ENVELOPE(-66.964,-66.964,-68.189,-68.189) PLOS ONE 13 12 e0208010 |
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Medicine R Science Q |
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Medicine R Science Q David Blondeau-Patissier Vittorio Ernesto Brando Christian Lønborg Susannah M Leahy Arnold G Dekker Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission. |
topic_facet |
Medicine R Science Q |
description |
Trichodesmium, a filamentous bloom-forming marine cyanobacterium, plays a key role in the biogeochemistry of oligotrophic ocean regions because of the ability to fix nitrogen. Naturally occurring in the Great Barrier Reef (GBR), the contribution of Trichodesmium to the nutrient budget may be of the same order as that entering the system via catchment runoff. However, the cyclicity of Trichodesmium in the GBR is poorly understood and sparsely documented because of the lack of sufficient observations. This study provides the first systematic analysis of Trichodesmium spatial and temporal occurrences in the GBR over the decade-long MERIS ocean color mission (2002-2012). Trichodesmium surface expressions were detected using the Maximum Chlorophyll Index (MCI) applied to MERIS satellite imagery of the GBR lagoonal waters. The MCI performed well (76%), albeit tested on a limited set of images (N = 25) coincident with field measurements. A north (Cape York) to south (Fitzroy) increase in the extent, frequency and timing of the surface expressions characterized the GBR, with surface expressions extending over several hundreds of kilometers. The two southernmost subregions Mackay and Fitzroy accounted for the most (70%) bloom events. The bloom timing of Trichodesmium varied from May in the north to November in the south, with wet season conditions less favorable to Trichodesmium aggregations. MODIS-Aqua Sea Surface Temperature (SST) datasets, wind speed and field measurements of nutrient concentrations were used in combination with MCI positive instances to assess the blooms' driving factors. Low wind speed (<6 m.s-1) and SST > 24°C were associated with the largest surface aggregations. Generalized additive models (GAM) indicated an increase in bloom occurrences over the 10-year period with seasonal bloom patterns regionally distinct. Interannual variability in SST partially (14%) explained bloom occurrences, and other drivers, such as the subregion and the nutrient budget, likely regulate Trichodesmium surface ... |
format |
Article in Journal/Newspaper |
author |
David Blondeau-Patissier Vittorio Ernesto Brando Christian Lønborg Susannah M Leahy Arnold G Dekker |
author_facet |
David Blondeau-Patissier Vittorio Ernesto Brando Christian Lønborg Susannah M Leahy Arnold G Dekker |
author_sort |
David Blondeau-Patissier |
title |
Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission. |
title_short |
Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission. |
title_full |
Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission. |
title_fullStr |
Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission. |
title_full_unstemmed |
Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission. |
title_sort |
phenology of trichodesmium spp. blooms in the great barrier reef lagoon, australia, from the esa-meris 10-year mission. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2018 |
url |
https://doi.org/10.1371/journal.pone.0208010 https://doaj.org/article/8e3ed971d008469bbfae61273bc0e9f0 |
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ENVELOPE(165.700,165.700,-70.650,-70.650) ENVELOPE(-57.955,-57.955,-61.923,-61.923) ENVELOPE(168.517,168.517,-77.700,-77.700) ENVELOPE(-87.000,-87.000,73.801,73.801) ENVELOPE(-66.964,-66.964,-68.189,-68.189) |
geographic |
North Cape Gam Mackay Cape York Fitzroy |
geographic_facet |
North Cape Gam Mackay Cape York Fitzroy |
genre |
North Cape |
genre_facet |
North Cape |
op_source |
PLoS ONE, Vol 13, Iss 12, p e0208010 (2018) |
op_relation |
https://doi.org/10.1371/journal.pone.0208010 https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0208010 https://doaj.org/article/8e3ed971d008469bbfae61273bc0e9f0 |
op_doi |
https://doi.org/10.1371/journal.pone.0208010 |
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PLOS ONE |
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13 |
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