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My research is focused on two main areas: 1) soil organic carbon (SOC) storage and stabilization in wildlands and agroecosystems, and 2) digital soil mapping (DSM) as a tool for sustainable management and soil security.
I completed a PhD in Ecology at Utah State University (USA), where I investigated the effects of overstory species on SOC storage and stability in semi-arid mixed aspen forests applying several SOC fractionation analyses and long-term incubations to measure SOC stability and bioavailability. I am interested in the influence of biotic (overstory vegetation, microbial functional diversity) and abiotic (parent material, nutrient availability) factors on soil organic matter chemistry, in relationship with the mechanisms of SOC stabilization. I applied mid-infrared spectroscopy to characterize the chemistry of SOC fractions to investigate whether higher stocks of mineral-associated SOC under aspen stands is caused by selective preservation of recalcitrant compounds. The topic of vegetation fingerprint on SOC was further investigated in a collaboration with the Institute of Silviculture at the University of Freiburg (Germany), where I applied near-infrared reflectance spectroscopy to develop prediction models for species derived (aspen vs. conifer) SOC concentration. Overall, the findings of SOC research in aspen ecosystems contribute to the emerging views on the mechanisms controlling SOC stability and soil organic matter formation.
In the field of DSM and pedometrics, I combine machine learning and geostatistics to predict the spatial distribution of soil properties and classes. Some of the most relevant outcomes from my postdoctoral research in the Infosol Unit at INRAE (Orléans, France) (2014-2018) were a set of pedotransfer functions for estimating soil available water capacity (AWC) as part of the RUEdesSOLS project, and producing the first AWC map with associated uncertainty for France (90 m grid) for GlobalSoilMap, a working group of the IUSS. These products have a relevant impact for agricultural management and land use planning, as they have been used to quantify soil multifunctionality for agricultural uses, and are used as input for crop and SOC dynamics modelling. I also investigated methods for combining data from various sources (model ensemble of maps produced at different scale) and spatial support (e.g., area-to-point kriging).
As a Postdoctoral Research Associate at the Sydney Institute of Agriculture I recently developed an innovative DSM framework for stratifying the soil landscape over large areas based on a new conceptual soil taxon, the pedogenon. Pedogenon mapping was designed to for assessing changes in soil condition caused by anthropogenic activities. Consulting companies are interested in applying pedogenon mapping for designing cost-effective soil monitoring strategies and quantifying carbon credits for farmers in large properties in Australia. My mission at SIA also consists of creating publicly available, high-resolution maps of SOC fractions stocks and soil microbial biodiversity for the TERN Soil and Landscape Grid of Australia. My commitment with climate change mitigation by enhancing SOC storage continues, as I am calibrating empirical models for quantifying and mapping the SOC sequestration potential of Australian agricultural soils.
Research Interests
Papers共 42 篇Author StatisticsCo-AuthorSimilar Experts
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GLOBAL CHANGE BIOLOGYno. 3 (2024): e17216-e17216
GEODERMA (2024): 116805
Scientific Datano. 1 (2023): 1-10
Soil Security (2023): 100108
Si Yang Han,Patrick Filippi,Mercedes Ŕomàn Dobarco, Januar Harianto,Mathew S. Crowther,Thomas Bishop
Elsevier eBooks (2023)
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Soil Security (2023): 100086-100086
Anthropocene (2023): 100393-100393
HAL (Le Centre pour la Communication Scientifique Directe) (2023)
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