Publication Repository

Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission

Show simple item record

dc.contributor Consiglio Nazionale Delle Ricerche (cnr)
dc.contributor Aims
dc.contributor Charles Darwin Univ
dc.contributor Natl Res Council Cnr
dc.contributor Riel
dc.contributor Commonwealth Scientific & Industrial Research Organisation (csiro)
dc.contributor Inst Atmospher Sci & Climate
dc.contributor Coll Sci & Engn
dc.contributor Istituto Di Biochimica Delle Proteine (ibp-cnr)
dc.contributor Csiro
dc.contributor Namra
dc.contributor Charles Darwin University
dc.contributor James Cook Univ
dc.contributor James Cook University
dc.contributor.author DEKKER, ARNOLD G.
dc.contributor.author BLONDEAU-PATISSIER, DAVID
dc.contributor.author BRANDO, VITTORIO ERNESTO
dc.contributor.author LONBORG, CHRISTIAN
dc.contributor.author LEAHY, SUSANNAH M.
dc.date.accessioned 2019-01-06T19:02:56Z
dc.date.accessioned 2019-01-06T19:02:56Z
dc.date.accessioned 2019-07-08T02:11:58Z
dc.date.available 2019-01-06T19:02:56Z
dc.date.available 2019-01-06T19:02:56Z
dc.date.available 2019-07-08T02:11:58Z
dc.date.issued 2018-12-14
dc.identifier.citation Blondeau-Patissier D, Brando VE, Lonborg C, Leahy SM, Dekker AG (2018) Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission. PLoS ONE 13(12):e0208010
dc.identifier.issn 1932-6203
dc.identifier.uri http://epubs.aims.gov.au/11068/14920
dc.description.abstract 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 degrees 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 aggregations in the GBR.
dc.description.sponsorship For this study, DBP was partly supported by a NAMRA post-doctoral fellowship and by CSIRO Oceans and Atmosphere funding. CNR, the RITMARE Flagship Project and the European Union (FP7-427 People Co-funding of Regional, National and International Programmes, GA n. 600407) supported VEB. Collection of the nutrient data presented in this study was obtained with support from the Great Barrier Reef Marine Park Authority (GBRMPA), through funding from the Australian Government's Caring for our Country Program and from the Australian Institute of Marine Science. The authors acknowledge the data providers: The European Space Agency (ESA) and ACRI-ST (www.acri-st.fr/) for providing the MERIS RR dataset; The Bureau of Meteorology (BoM; www.bom.gov.au), IMOS (Integrated Marine Observing System; http://imos.org.au) and eReefs (http://ereefs.org.au).The authors are grateful to: Elsevier Language Editing Services for providing editing support; Jonathan Hodge (CSIRO Oceans and Atmosphere) for providing guidance in extracting the wind data from eReefs; CSIRO Data61 (Ecosciences Precinct) for advice for parts of the data analysis, and Dr Phillip Ford, Dr Peter Rothlisberg and Dr Tim Malthus (CSIRO Oceans and Atmosphere) for comments on previous versions of the manuscript. All the processing of the ESA MERIS imagery was performed with the Sentinel Application Platform (SNAP) (Brockmann Consult).
dc.description.sponsorship For this study, DBP was partly supported by a NAMRA post-doctoral fellowship and by CSIRO Oceans and Atmosphere funding. VEB was supported by CNR, the RITMARE flagship Project and the European Union (FP7-427 People Co-funding of Regional, National and International Programmes, GA n. 600407). Collection of the nutrient data presented in this study was obtained with support from the Great Barrier Reef Marine Park Authority (GBRMPA), through funding from the Australian Government's Caring for our Country Program and from the Australian Institute of Marine Science.
dc.language English
dc.subject Environmental Controls
dc.subject Floating Sargassum
dc.subject Organic-matter
dc.subject Science & Technology - Other Topics
dc.subject Water-quality
dc.subject Growth-rates
dc.subject N-2 Fixation
dc.subject Multidisciplinary Sciences
dc.subject Biogeochemical Model
dc.subject Nitrogen-fixation
dc.subject Marine Cyanobacterium
dc.subject Central 17-degrees-s
dc.title Phenology of Trichodesmium spp. blooms in the Great Barrier Reef lagoon, Australia, from the ESA-MERIS 10-year mission
dc.type journal article
dc.identifier.doi 10.1371/journal.pone.0208010
dc.identifier.wos WOS:000453248000013


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search Publication


Browse

My Account