A5068963211- Coastal wetland ecosystem dynamics
- Coastal and Marine Dynamics
- Heavy metals in environment
- Soil and Water Nutrient Dynamics
- Groundwater and Isotope Geochemistry
- Hydrology and Watershed Management Studies
- Marine and coastal plant biology
- Mercury impact and mitigation studies
- Methane Hydrates and Related Phenomena
- Wastewater Treatment and Nitrogen Removal
- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Coral and Marine Ecosystems Studies
- Urban Stormwater Management Solutions
- Soil erosion and sediment transport
- Radioactivity and Radon Measurements
- Environmental Toxicology and Ecotoxicology
- Constructed Wetlands for Wastewater Treatment
- Marine and coastal ecosystems
- Heavy Metal Exposure and Toxicity
- Cassava research and cyanide
- Water Quality and Pollution Assessment
Southern Cross University
2016-2024
Abstract Saltmarshes are a blue carbon ecosystem accumulating large quantities of organic in sediments. Some this can be transformed into dissolved inorganic (DIC) and methane (CH 4 ) that may eventually exported to the ocean or atmosphere. Although extensive studies have quantified specific components budget such as burial, limited attention has been given pore‐water‐derived total alkalinity (TA) exports ocean. Here, we lateral (outwelling) 202 ± 160 78 75 mmol m −2 d −1 DIC TA,...
Abstract Headwater streams play a large role in aquatic greenhouse gas emissions. Carbon dioxide (CO 2 ) and dissolved oxygen often undergo changes through diel cycles. However, methane (CH 4 nitrous oxide (N O) have unknown dynamics. Here, we reveal consistent patterns CO , CH N O over cycles during flood events using high‐frequency continuous observations subtropical headwater stream. Diel were most pronounced baseflow. Increased nighttime discharge due to higher groundwater inputs...
Abstract Global mangrove loss is occurring from deforestation and extreme climatic events, but changes to the coastal carbon cycle following mortality and/or are not well understood. In 2015/2016, a massive climate‐driven dieback event occurred over ~ 1000 km of Australian coastline. To assess mortality, fluxes in adjacent living dead forest areas were compared 8 20 months postforest dieback. Dead experienced an increase soil CO 2 efflux by 189%, decrease oceanic dissolved inorganic (DIC)...
Abstract. Hypersaline tidal flats (HTFs) are coastal ecosystems with freshwater deficits often occurring in arid or semi-arid regions near mangrove supratidal zones no major fluvial contributions. Here, we estimate that organic carbon (OC), total nitrogen (TN) and phosphorus (TP) were buried at rates averaging 21 (±6), 1.7 (±0.3) 1.4 gm-2yr-1, respectively, during the previous century three contrasting HTF systems, one Brazil (eutrophic) two Australia (oligotrophic). Although these lower...
Coastal blue carbon habitats perform many important environmental functions, including long-term and anthropogenic contaminant storage. Here, we analysed twenty-five 210Pb-dated mangrove, saltmarsh, seagrass sediment cores from six estuaries across a land-use gradient to determine metal, metalloid, phosphorous sedimentary fluxes. Cadmium, arsenic, iron, manganese had linear exponential positive correlations between concentrations, flux, geoaccumulation index, catchment development. Increases...
Two sediment cores were collected at the margins of well-developed mangrove forests to study effects anthropogenic activities in Paranagua region Brazil.Calculations trace metal content, flux, and enrichment factors (EF) performed.Trace (Hg, Zn, Pb, Ni, Co, Mn Cu) contents showed differing values down core amongst sites, which not indicative accumulation rates or EF.Slight enrichments these metals observed congruent with mining area occurring prior 1900.Multiple rapid increases flux...
Mitigating climate change through the reduction of atmospheric CO2 levels is interest, particularly maintaining and re-establishing natural ecosystems that act as carbon sinks, such coastal vegetated habitats or "blue carbon" systems. Here we compare sedimentary blue (C) stocks from 37 sediment cores collected in pristine (n=13), agricultural (n=11), urban (n=13) estuaries within same geomorphological region, located on eastern coast Australia. The mean estimated C for each system (seagrass,...
Coastal blue carbon habitats perform many important environmental functions, including long-term and anthropogenic contaminant storage. Here, we analysed twenty-five 210Pb-dated mangrove, saltmarsh, seagrass sediment cores from six estuaries across a land-use gradient to determine metal, metalloid, phosphorous sedimentary fluxes. Cadmium, arsenic, iron, manganese had linear exponential positive correlations between concentrations, flux, geoaccumulation index catchment development. Increases...