Publications by authors named "A Poulton"

The Southern Ocean, a region highly vulnerable to climate change, plays a vital role in regulating global nutrient cycles and atmospheric CO via the biological carbon pump. Diatoms, photosynthetically active plankton with dense opal skeletons, are key to this process as their exoskeletons are thought to enhance the transfer of particulate organic carbon to depth, positioning them as major vectors of carbon storage. Yet conflicting observations obscure the mechanistic link between diatoms, opal and particulate organic carbon fluxes, especially in the twilight zone where greatest flux losses occur.

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Objective: Investigate the treatment patterns and prescribers of stimulants for attention deficit hyperactivity disorder (ADHD) in young people in New South Wales (NSW).

Method: Longitudinal cohort study of persons born after 1983 and prescribed stimulants for ADHD as per the NSW Ministry of Health Controlled Drugs Data Collection. Results were analyzed descriptively: a) treatment prevalence by year; age; sex; b) speciality of prescribers over time; c) rate of transition from paediatrics to adult psychiatry.

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Background: Amphetamines increase dopamine levels in mid-brain regions which, in turn, impact top-down executive function. Repeated exposure is linked to substance use disorders. Nonetheless, amphetamines are used to manage attention-deficit/hyperactivity disorder (ADHD) and eating-related disorders.

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The Controls Over Mesopelagic Interior Carbon Storage (COMICS) cruise DY086 took place aboard the RRS Discovery in the South Atlantic during November and December, 2017. Physical, chemical, biogeochemical and biological data were collected during three visits to ocean observatory station P3, off the coast of South Georgia, during an austral spring bloom. A diverse range of equipment including CTD-rosette, Acoustic Doppler Current Profiler (ADCP), net deployments, marine snow catchers (MSCs), Stand Alone Pump System (SAPS) and PELAGRA Sediment Traps were used to produce a comprehensive, high-quality dataset.

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Article Synopsis
  • Marine sediments are significant carbon stores, but bottom trawl fisheries disturb seabed habitats, potentially impacting the ocean's carbon dioxide sink.
  • Research is concerned that trawling may turn these sediments into a significant source of CO, but there's a lot of uncertainty due to limited understanding of how trawling affects sediment mixing and carbon processes.
  • A review protocol will investigate the effects of mobile bottom fishing on carbon processing and storage in sediments by addressing various questions about carbon types, fluxes between benthic and pelagic systems, and the biological and physical controls on this carbon.
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