A5061584098- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Soil Carbon and Nitrogen Dynamics
- Pleistocene-Era Hominins and Archaeology
- Archaeology and ancient environmental studies
- Pacific and Southeast Asian Studies
- Groundwater and Isotope Geochemistry
- Atmospheric and Environmental Gas Dynamics
- Fire effects on ecosystems
- Plant Water Relations and Carbon Dynamics
- Ecology and Vegetation Dynamics Studies
- Geological formations and processes
- Cell Adhesion Molecules Research
- Marine and coastal ecosystems
- Geological and Geophysical Studies
- Clay minerals and soil interactions
- Peatlands and Wetlands Ecology
- Forest ecology and management
- Glycosylation and Glycoproteins Research
- Metabolism and Genetic Disorders
- Carbohydrate Chemistry and Synthesis
- Evolution and Paleontology Studies
- Soil and Water Nutrient Dynamics
- Cryospheric studies and observations
- Soil and Unsaturated Flow
James Cook University
2016-2025
Australian Institute of Tropical Health and Medicine
2013-2024
University of Wollongong
2019-2024
Flinders University
2024
Bridge University
2024
Australian Research Council
2019-2024
University of Sheffield
2024
Heritage College
2023
Syngenta (United Kingdom)
2020-2023
Bush Heritage Australia
2018-2023
Abstract. Tropical tree height-diameter (H:D) relationships may vary by forest type and region making large-scale estimates of above-ground biomass subject to bias if they ignore these differences in stem allometry. We have therefore developed a new global tropical database consisting 39 955 concurrent H D measurements encompassing 283 sites 22 countries. Utilising this database, our objectives were: 1. determine H:D differ geographic (wet dry forests, including zones tension where savanna...
Pyrogenic carbon (PyC; includes soot, char, black carbon, and biochar) is produced by the incomplete combustion of organic matter accompanying biomass burning fossil fuel consumption. PyC pervasive in environment, distributed throughout atmosphere as well soils, sediments, water both marine terrestrial environment. The physicochemical characteristics are complex highly variable, dependent on precursor conditions formation. A component recalcitrant persists environment for millennia. However,...
Abstract Soil degradation is a critical and growing global problem. As the world population increases, pressure on soil also increases natural capital of faces continuing decline. International policy makers have recognized this range initiatives to address it emerged over recent years. However, gap remains between what science tells us about its role in underpinning ecological human sustainable development, existing instruments for development. Functioning necessary ecosystem service...
Abstract At the time of European arrival on Australian continent, sophisticated Indigenous societies practiced land management across Australia’s extensive tropical savannahs. Fire was one main tools people used to manipulate fuel loads and connectivity reduce uncontrolled wildfire, maintain vegetation structure enhance biodiversity. When this alteration a ‘natural’ fire regime human-dominated occurred is not known. Here we assessed incidence intensity over past 150,000 years through...
We present results that validate a new wet oxidation, stepped-combustion procedure for dating “old” charcoal samples. An acid–base–wet oxidation (ABOX) pretreatment has been developed is used in place of the conventional acid-base-acid (ABA) pretreatment. Combustions and graphitizations are performed vacuum line insulated from atmosphere by second backing to eliminate risk atmospheric leakage into at any stage procedure. 3 temperatures (330 °, 630 ° 850 °) with graphite target produced CO 2...
Abstract New dating confirms that people occupied the Australian continent before earliest time inferred from conventional radiocarbon analysis. Many of new ages were obtained by accelerator mass spectrometry 14 C after an acid–base–acid pretreatment with bulk combustion (ABA-BC) or a newly developed acid–base–wet oxidation stepped (ABOX-SC). The samples (charcoal) came occupation levels Devil's Lair site in southwestern Western Australia. Initial this was previously dated 35,000 yr B.P....
We have investigated the stability of oxidation‐resistant elemental carbon (OREC) in a sandy savanna soil at Matopos fire trial site, Zimbabwe. The protection some plots from for last 50 years this site has enabled comparison OREC abundances between those which been protected and continued to be burnt. total 0–5 cm inventory is estimated 2.0±0.5 mg −2 ; approximately half “natural” study 3.8±0.5 (the mean burnt every 1–5 years). associated half‐life natural loss interval calculated <100...
Abstract 1. The carbon content and δ 13 C value of soil organic (SOC), microbial biomass (C mic ) respired CO 2 were measured in a range grassland soils from tropical temperate biomes to determine if isotope effect degradation can induce shift composition SOC . depth 0–2 cm was analysed. using the chloroform fumigation extraction method, while closed system after 3 10 days incubation. Two soils, tropical, used for long‐term experiment, which measurements performed 3, 40 2. decrease...
Photosynthetic leaf traits were determined for savanna and forest ecosystems in West Africa, spanning a large range precipitation. Standardized major axis fits revealed important differences between our data reported global relationships. Especially sites the drier areas, plants showed higher photosynthetic rates given N or P when compared with relationships from set. The best multiple regression pooled set estimated V(cmax) J(max) N(DW) S. However, different vegetation types varied,...