Adrian A. Wackett was born and raised in Saint Paul, Minnesota (unceded Wahpekute/Dakota lands). He double majored in Chemistry and Geosciences at Trinity University (TX) before returning to Saint Paul and completing his MS degree in Land & Atmospheric Sciences (specifically pedology/biogeochemistry) at the University of Minnesota-Twin Cities, where he studied global w'o'rming. Before coming to Stanford as an NSF GRFP Fellow he traveled extensively through Latin America and SE Asia (by bike) and worked as an independent researcher affiliated with the Department of Ecology and Environmental Sciences at Umeå University and the Climate Impacts Research Centre in Abisko, Sweden. He is broadly curious in learning how the world works, and this informs his outlook towards research. Previous topics of inquiry include: coupling ant bioturbation to the erosion and weathering of hillslope soils in SE Australia, exploring earthworm invasions and their deterministic effects on soil carbon stocks and forms in Fennoscandian and Alaskan forests, and examining the biogeochemical diversity of ‘black smoker’ plume particles at deep-sea hydrothermal vents.
Honors & Awards
Fellow, NSF GRFP (2022-2027)
Awardee, Fulbright US Student Program - New Zealand (2021-2022)
Fellow, American-Scandinavian Foundation (2020-2021)
Fellow, Wilford R. Gardner Fellowship, International Union of Soil Sciences (2018)
Fellow, Allmaras-Howe Fellowship, University of Minnesota - Twin Cities (2015-2016)
Professional Affiliations and Activities
Member, Geochemical Society (2022 - Present)
Education & Certifications
MS, University of Minnesota - Twin Cities, Land and Atmospheric Sciences (2018)
BS, Trinity University (TX), Chemistry; Geosciences (2014)
- Quantifying erosion rates and weathering pathways that maximize soil organic carbon storage BIOGEOCHEMISTRY 2023
Non-native species change the tune of tundra soils: Novel access to soundscapes of the Arctic earthworm invasion.
The Science of the total environment
Over the last decade, an increasing number of studies have used soundscapes to address diverse ecological questions. Sound represents one of the few sources of information capable of providing in situ insights into processes occurring within opaque soil matrices. To date, the use of soundscapes for soil macrofauna monitoring has been experimentally tested only in controlled laboratory environments. Here we assess the validity of laboratory predictions and explore the use of soil soundscape proxies for monitoring soil macrofauna (i.e., earthworm) activities in an outdoor context. In a common garden experiment in northern Sweden, we constructed outdoor mesocosm plots (N = 36) containing two different Arctic vegetation types (meadow and heath) and introduced earthworms to half of these plots. Earthworms substantially altered the ambient soil soundscape under both vegetation types, as measured by both traditional soundscape indices and frequency band power levels, although their acoustic impacts were expressed differently in heath versus meadow soils. While these findings support the as-of-yet untapped promise of using belowground soundscape analyses to monitor soil ecosystem health, direct acoustic emissions from earthworm activities appear to be an unlikely proxy for tracking worm activities at daily timescales. Instead, earthworms indirectly altered the soil soundscape by 're-engineering' the soil matrix: an effect that was dependent on vegetation type. Our findings suggest that long-term (i.e., seasonal) earthworm activities in natural soil settings can likely be monitored indirectly via their impacts on soundscape measures and acoustic indices. Analyzing soil soundscapes may enable larger-scale monitoring of high-latitude soils and is directly applicable to the specific case of earthworm invasions within Arctic soils, which has recently been identified as a potential threat to the resilience of high-latitude ecosystems. Soil soundscapes could also offer a novel means to monitor soils and soil-plant-faunal interactions in situ across diverse pedogenic, agronomic, and ecological systems.
View details for DOI 10.1016/j.scitotenv.2022.155976
View details for PubMedID 35618134
- Consistent mineral-associated organic carbon chemistry with variable erosion rates in a mountainous landscape GEODERMA 2022; 405
Global data on earthworm abundance, biomass, diversity and corresponding environmental properties
2021; 8 (1): 136
Earthworms are an important soil taxon as ecosystem engineers, providing a variety of crucial ecosystem functions and services. Little is known about their diversity and distribution at large spatial scales, despite the availability of considerable amounts of local-scale data. Earthworm diversity data, obtained from the primary literature or provided directly by authors, were collated with information on site locations, including coordinates, habitat cover, and soil properties. Datasets were required, at a minimum, to include abundance or biomass of earthworms at a site. Where possible, site-level species lists were included, as well as the abundance and biomass of individual species and ecological groups. This global dataset contains 10,840 sites, with 184 species, from 60 countries and all continents except Antarctica. The data were obtained from 182 published articles, published between 1973 and 2017, and 17 unpublished datasets. Amalgamating data into a single global database will assist researchers in investigating and answering a wide variety of pressing questions, for example, jointly assessing aboveground and belowground biodiversity distributions and drivers of biodiversity change.
View details for DOI 10.1038/s41597-021-00912-z
View details for Web of Science ID 000657695700001
View details for PubMedID 34021166
View details for PubMedCentralID PMC8140120
Global distribution of earthworm diversity
2019; 366 (6464): 480-+
Soil organisms, including earthworms, are a key component of terrestrial ecosystems. However, little is known about their diversity, their distribution, and the threats affecting them. We compiled a global dataset of sampled earthworm communities from 6928 sites in 57 countries as a basis for predicting patterns in earthworm diversity, abundance, and biomass. We found that local species richness and abundance typically peaked at higher latitudes, displaying patterns opposite to those observed in aboveground organisms. However, high species dissimilarity across tropical locations may cause diversity across the entirety of the tropics to be higher than elsewhere. Climate variables were found to be more important in shaping earthworm communities than soil properties or habitat cover. These findings suggest that climate change may have serious implications for earthworm communities and for the functions they provide.
View details for DOI 10.1126/science.aax4851
View details for Web of Science ID 000493177900045
View details for PubMedID 31649197
View details for PubMedCentralID PMC7335308
- Soil organic carbon and mineral interactions on climatically different hillslopes GEODERMA 2018; 322: 71-80
- Climate controls on coupled processes of chemical weathering, bioturbation, and sediment transport across hillslopes EARTH SURFACE PROCESSES AND LANDFORMS 2018; 43 (8): 1575-1590
- Human-mediated introduction of geoengineering earthworms in the Fennoscandian arctic BIOLOGICAL INVASIONS 2018; 20 (6): 1377-1386