Assessing the additive risks of PSII herbicide exposure to the Great Barrier Reef

Lewis, Stephen E.; Schaffelke, Britta; Shaw, Melanie; Bainbridge, Zoë; Rohde, Ken; Kennedy, Karen; Davis, Aaron M.; Masters, B.; Devlin, Michelle; Mueller, Jochen F.; Brodie, Jon

doi:10.1016/j.marpolbul.2011.11.009

Cited by 80 publications

(74 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…DIN enrichment can also lead to significant physiological changes in coral [3,58]. Photosystem II herbicides (hereafter PSII), the herbicides most commonly found in the GBR [59,60], inhibit electron transport and reduce efficiency of photosynthetic energy acquisition of seagrasses and corals [61][62][63]. Finally, both the amount (concentration or load) and duration of exposure to a contaminant often co-determines the severity of an ecosystem response to the contaminant exposure [57,62,[64][65][66][67].…”

Section: Link Between Contaminants and Reef And Seagrass Healthmentioning

confidence: 99%

“…The mean value (ˆ˘standard error) of TSS, PSII, DIN, Dissolved Inorganic Phosphorus (DIP), K d (PAR), Chl-a, CDOM and PSII, as well as the mean salinity, was then calculated for each water type over the 2005-2014 sampling period. It has been shown that the herbicide residues in the GBR flood plumes are predominantly in the dissolved phase rather than bound to particulate materials [59], and change in herbicide concentrations across plume waters is believed to be principally controlled by a conservative mixing behaviour with the seawater rather than by a chemical or biological breakdown [60]. The number of PSII data available in each plume water type was limited and showed a non-conservative behaviour.…”

Section: Coral Monitoring Programsmentioning

confidence: 99%

See 1 more Smart Citation

Estimating the Exposure of Coral Reefs and Seagrass Meadows to Land-Sourced Contaminants in River Flood Plumes of the Great Barrier Reef: Validating a Simple Satellite Risk Framework with Environmental Data

et al. 2016

View full text Add to dashboard Cite

River runoff and associated flood plumes (hereafter river plumes) are a major source of land-sourced contaminants to the marine environment, and are a significant threat to coastal and marine ecosystems worldwide. Remote sensing monitoring products have been developed to map the spatial extent, composition and frequency of occurrence of river plumes in the Great Barrier Reef (GBR), Australia. There is, however, a need to incorporate these monitoring products into Risk Assessment Frameworks as management decision tools. A simple Satellite Risk Framework has been recently proposed to generate maps of potential risk to seagrass and coral reef ecosystems in the GBR focusing on the Austral tropical wet season. This framework was based on a "magnitudeˆlikelihood" risk management approach and GBR plume water types mapped from satellite imagery. The GBR plume water types (so called "Primary" for the inshore plume waters, "Secondary" for the midshelf-plume waters and "Tertiary" for the offshore plume waters) represent distinct concentrations and combinations of land-sourced and marine contaminants. The current study aimed to test and refine the methods of the Satellite Risk Framework. It compared predicted pollutant concentrations in plume water types (multi-annual average from 2005-2014) to published ecological thresholds, and combined this information with similarly long-term measures of seagrass and coral ecosystem health. The Satellite Risk Framework and newly-introduced multi-annual risk scores were successful in demonstrating where water conditions were, on average, correlated to adverse biological responses. Seagrass meadow abundance (multi-annual change in % cover) was negatively correlated to the multi-annual risk score at the site level (R 2 = 0.47, p < 0.05). Relationships between multi-annual risk scores and multi-annual changes in proportional macroalgae cover (as an index for coral reef health) were more complex (R 2 = 0.04, p > 0.05), though reefs incurring higher risk scores showed relatively higher proportional macroalgae cover. Multi-annual risk score thresholds associated with loss of seagrass cover were defined, with lower risk scores (ď0.2) associated with a gain or little loss in seagrass cover (gain/´12%), medium risk scores (0.2-0.4) associated with moderate loss (´12/´30%) and higher risk scores (>0.4) with the greatest loss in cover (>´30%). These thresholds were used to generate an intermediate river plume risk map specifically for seagrass meadows of the GBR. An intermediate river plume risk map for coral reefs was also developed by considering a multi-annual risk score threshold of 0.2-above which a higher proportion of macroalgae within the algal communities can be expected. These findings contribute to a long-term and adaptive approach to set relevant risk framework and thresholds for adverse biological responses in the GBR. The ecological thresholds and risk scores used in this study will be refined and validated through ongoing monitoring and assessment. As uncertainties are red...

show abstract

Section: Link Between Contaminants and Reef And Seagrass Healthmentioning

confidence: 99%

Section: Coral Monitoring Programsmentioning

confidence: 99%

Estimating the Exposure of Coral Reefs and Seagrass Meadows to Land-Sourced Contaminants in River Flood Plumes of the Great Barrier Reef: Validating a Simple Satellite Risk Framework with Environmental Data

et al. 2016

View full text Add to dashboard Cite

show abstract

“…More recently, photosystem II (PSII) inhibiting herbicides have been reported in the GBR lagoon at concentrations which have the potential to harm vulnerable microalgal, seagrass and coral communities; and that 80% of time they are present as components of complex mixtures (Mitchell et al, 2005;Rohde et al, 2008;Lewis et al, 2009Lewis et al, , 2012Kennedy et al, 2012). As part of the catchment monitoring program, pesticide sampling commenced in 2009/2010 in 8 catchments and 3 sub-catchments (Smith et al, 2012).…”

Section: Long-term Catchment Monitoring Of Water Qualitymentioning

confidence: 99%

A Paddock to reef monitoring and modelling framework for the Great Barrier Reef: Paddock and catchment component

Carroll

Waters

Vardy

et al. 2012

Marine Pollution Bulletin

Self Cite

100

View full text Add to dashboard Cite

“…The effects of suspended sediment and nutrient discharge remain a long-standing theme for GBR water quality research (Devlin and Brodie, 2005;McCulloch et al, 2003), with recent studies also highlighting pesticide residues as an emergent issue for GBR ecosystem health. Pesticide residues have been documented across virtually the entire continuum of GBR associated environments including; catchment irrigation drainage systems and waterways (Davis et al, 2008(Davis et al, , 2011Hunter et al, 2001;Mitchell et al, 2005;Müller et al, 2000;Packett et al, 2009;Stork et al, 2008); estuaries ; nearshore marine habitats (Haynes et al, 2000a); and coastal marine environments Lewis et al, 2009Lewis et al, , 2012Shaw and Müller, 2005;Shaw et al, 2010).…”

Section: Great Barrier Reef Pesticide Water Quality Issuesmentioning

confidence: 99%

Dynamics of herbicide transport and partitioning under event flow conditions in the lower Burdekin region, Australia

Davis

Lewis

Bainbridge

et al. 2012

Marine Pollution Bulletin

Self Cite

View full text Add to dashboard Cite

Assessing the additive risks of PSII herbicide exposure to the Great Barrier Reef

Cited by 80 publications

References 58 publications

Estimating the Exposure of Coral Reefs and Seagrass Meadows to Land-Sourced Contaminants in River Flood Plumes of the Great Barrier Reef: Validating a Simple Satellite Risk Framework with Environmental Data

Estimating the Exposure of Coral Reefs and Seagrass Meadows to Land-Sourced Contaminants in River Flood Plumes of the Great Barrier Reef: Validating a Simple Satellite Risk Framework with Environmental Data

A Paddock to reef monitoring and modelling framework for the Great Barrier Reef: Paddock and catchment component

Dynamics of herbicide transport and partitioning under event flow conditions in the lower Burdekin region, Australia

Contact Info

Product

Resources

About