Associate Professor Uffe Nielsen

Uffe NielsenUffe joined HIE in 2011 from the Department of Biology and Natural Resource Ecology Laboratory, Colorado State University, USA, where he worked as a Research Scientist with Professor Diana H. Wall.

Uffe received his PhD in 2008 from University of Aberdeen, Scotland, in close collaboration with the Macaulay Institute (now the James Hutton Institute) and Center of Hydrology and Biology (CEH). His PhD research focused on the distribution and community composition of soil biota (microbes and soil mites in particular) across various spatial scales in two contrasting habitats. This research mainly targeted the questions of what structures belowground communities and how belowground communities respond to environment parameters and environmental changes (such as land use and climate).

Through his research at CSU Uffe continued investigating patterns of, and mechanisms underlying, biodiversity and community composition belowground, whilst also trying to establish and quantify potential links between soil biodiversity and belowground community composition and ecosystem processes/functioning and ecosystem services.

His position here also allowed him to expand his research to include a more broad range of soil biota and explore the flow of C and N through the soil food web using stable isotope techniques.

Areas of Research / Teaching Expertise

Uffe is broadly interested in community and ecosystem ecology, and the link between the two, i.e. how do changes in one influence the other.

In a time where large-scale changes in land use and climate are impacting ecosystems across the globe it is essential for human well-being to acquire knowledge of the potential implications of these changes. For instance, species gains and losses, and changes in community composition, belowground due to climate changes can impact nutrient cycling, which may lead to changes in aboveground communities and potentially limit productivity of agricultural lands.

Other research areas of interest to Uffe include large-scale ecological theories, whether ecological theories hold across ecosystem types (including soils) and scales, drivers of species richness and biogeography (of soil biota in particular) etc.

Over the past few years Uffe has used the biologically simple soils of the McMurdo Dry Valleys, East Antarctica, to explore these aspects of ecology. While he will continue his Antarctic research through collaboration with the Australian Antarctic Division as well as the USA McMurdo Long Term Ecological Research program he will explore whether the hypotheses gained through this research are applicable in more biologically complex systems.

Motivated students are encouraged to contact Dr Nielsen to discuss potential undergraduate and graduate research projects broadly related to soil ecology and above-belowground interactions.

Awards and Recognition

  • Recognised as the Theme Research Coordinator for the Soil Biology and Genomics theme of the HIE.
  • Authored the new book Soil Fauna Assemblages
  • Section editor for Nature Knowledge (Community Ecology)
  • Subject editor for Ecosphere
  • Reviewer for several international journals including: Biology Letters; Ecosystems; Global Change Biology; Nature Knowledge; Oecologia; Plant and Soil; PLoS ONE; Soil Biology & Biochemistry

Current Project Grants

Management of foliar bacterial diseases in vegetables 
Co-Researcher: Jonathan Plett
Partner/Funding Body: Hort Innovation [via NSW Dept of Primary Industries]
Period: 2023-2026

The role of rewilding in the restoration of invertebrate and microbial biodiversity and ecological processes

Co-Researcher: Yolima Carrillo
Partner/Funding Body: NSW Department of Planning and Environment
Period: 2023-2027

Understanding Indigenous place-based knowledges, histories and ecologies
Co-Researchers: Paul Rymer, Michelle Catanzaro, Madison Shakespeare, James Gourley, Katrina Sandbach, Jason Tuckwell, Liz Ayres
Partner/funding body: Seed Funding Scheme – School of Humanities

Period: 2022

Entomopathogenic nematodes as biological control agents of important honey bee pests in Australia

Co-Researchers: Markus Riegler, Robert Spooner-Hart, James Cook and Clarissa House (SoSC)
Partner/Funding Body: Horticulture Innovation Australia
Period: 2022-2026

Former snowy scheme rehabilitation sites project - biological indicators
Co-Researchers: Jeff Powell and Yolima Carrillo
Partner/Funding Body: NSW Department of Planning, Industry and Environment
Period: 2021-2022

Cumberland Plain Conservation Plan - Research Strategy and Implementation
Co-Researchers: Paul Rymer, Catriona Macdonald, Rachael Nolan, Elise Pendall, Jeff Powell, Yolima Carrillo, Matthias Boer, Ben Moore, Markus Riegler, Neil Perry and Juan Salazar
Partner/Funding Body: NSW Department of Planning, Industry and Environment
Period: 2021-2025

Identifying meaningful ecosystem function indicators for threatened ecological communities
Co-Researchers: Yolima Carrillo, Catriona Macdonald and Jeff Powell
Partner/Funding Body: NSW Office of Environment and Heritage
Period: 2019-2021

Causes and consequences of biogeochemical mismatches during drought
Co-Researchers: Yolima Carrillo, Tom Jeffries, Feike Dijkstra and Osvaldo Sala
Partner/Funding Body: Australian Research Council Discovery
Period: 2019-2021

Ecophysiological forecasting for mitigating environmental change in Antarctica
Partner/Funding Body: Australian Antarctic Program [via Murdoch University]
Period: 2016

The legacy of rainfall patterns in dryland ecosystems
Co-Researchers: Brajesh Singh
Partner/Funding Body: Australian Research Council Discovery
Period: 2015-2017

Selected Research Images

Fauna within a single soil coreSoils are highly diverse systems. All the fauna shown here was extracted using Tullgren funnels (dry extraction) from a single soil core collected in a birch woodland, Scotland, measuring 3.5 cm diameter and 5 cm depth. This method only samples the fauna that live in the airfilled pores within the soil also known as microarthropods. It is not unusual to find several hundreds of thousands individuals representing hundreds of species in one m2 soil. If we used a different wet extraction method the soils would reveal a further astonishing diversity of mesofauna dominated by the nematodes (with abundances measured in the millions per m2). All these organisms combined have a large impact on the soil food web, and they represent a multitude of life styles ranging from plant parasites to predators. While our knowledge of these organisms is accumulating we still need a better understanding of how they influence key processes, such as decomposition and the release of nutrients for plants, and how the communities will respond to land management and potential climate change scenarios to better protect and conserve the benefits we receive from soils.

Project Bluestem, Kansas, USAProject Bluestem at the Konza Long-Term Ecological Research site, Kansas, USA. This project uses dual stable isotope (13C and 15N) labelled big bluestem litter to investigate how carbon and nitrogen flows through the soil food web and how large a role soil fauna play in the decomposition process. Dr. Nielsen is a collaborator on the project with the principal investigator, Prof Francesca Cotrufo, and the co-investigators, Profs Diana Wall and Bill Parton, all based at Natural Resource Ecology Lab at Colorado State University.

East AntarcticaTaylor Valley, McMurdo Dry Valleys, East Antarctica. While a large part of Antarctica is ice or snow covered some areas, like the McMurdo Dry Valleys, are ice and snow free all year round. The soils found here are very low in organic matter and highly saline, and available water is limited to a short period of time during the summer. Only a few species of higher soil fauna (including nematodes, rotifers and tardigrades) are capable of surviving these conditions. However, the simplicity of the communities and potential climate change impacts makes it a highly valuable system to research. Key areas of research include the study of the biogeography of soil fauna throughout the McMurdo Dry Valleys (i.e. why are the animals where they are) and how will the system might respond to climate changes (both gradual and extreme events).

Young sprout on a black background

Selected Publications


Nielsen UN, (2019) 'Soil Fauna Assemblages. Global to Local Scales.' Cambridge University Press, (opens in a new window)

Book Chapters

Hiltpold I, Johnson SN, Le Bayon R-C & Nielsen U (2017). Climate change in the underworld: impacts for soil-dwelling invertebrates. In Global Climate Change and Terrestrial Invertebrates (ed. by S.N. Johnson & T.H. Jones), pp. 201-228. Wiley-Blackwell, Chichester, UK.

Nielsen UN, Wall DH, (2010) 'Soil biodiversity in extreme soil environments', In: Jeffery, S. et al (Eds). European Atlas of Soil Biodiversity. European Commission, Publications Office of the European Union, Luxemburg. Chapter 3, section 7, pp 32-35

Wall DH, Nielsen UN, (2009) 'The Substrate of Life - Soils', In: The Wealth of Nature – Ecosystem Services, Biodiversity and Human Well-being. McNeely, JA. et al. (Eds). Conservation International. Washington, DC

Riis T, Brix H, Nielsen UN, (2008) 'Luronium natans in River Skjern, Denmark', In: Skjern å. Nielsen, I. et al. (Eds.) pp 185-200. In Danish.

Nielsen UN, (2005) 'Current distribution of Luronium natans in Denmark, URT (Danish botanical journal). In Danish.

Journal Articles

Szejgis J, Carrillo Y, Jeffries TC, Dijkstra FA, Chieppa J, Horn S, Bristol D, Maisnam P, Eldridge D, Nielsen UN, (2024) 'Altered rainfall greatly affects enzyme activity but has limited effect on microbial biomass in Australian dryland soils', Soil Biology and Biochemistry, vol.189, Article no.109277

Ball BA, Convey P, Feeser KL, Nielsen UN, Van Horn D, (2023) 'Habitat severity characteristics structure soil communities at regional and local spatial scales along the Antarctica Peninsula', Antarctic Science, Article no.PII S0954102023000019

Bristol D, Hassan K, Blankinship JC, Nielsen UN, (2023) 'Responses of nematode abundances to increased and reduced rainfall under field conditions: A meta-analysis', Ecosphere, vol.14, no.1, Article no.e4364

Cui H, Liu X, Chen S, Liu Z, Chen J, Zhou H, Xiao S, Wang J, Song H, Wang Y, Yang Z, Liu K, An L, Nielsen UN, (2023) 'Contrasting responses of nematode composition, richness and biomass to long-term warming', Science of the Total Environment, vol.894, art. no.165074

Dorrough J, Val J, Travers SK, Wilson B, Eldridge DJ, Carrillo Y, Nielsen UN, Powell JR, Wilks G, McPherson P, Oliver I, (2023) 'Integrated analysis of aboveground and belowground indicators support a comprehensive evaluation of ecosystem recovery', Restoration Ecology, vol.31, no.8, Article no.e13987

Griffin-Nolan RJ, Chieppa J, Knapp AK, Nielsen UN, Tissue DT, (2023) 'Coordination of hydraulic and morphological traits across dominant grasses in eastern Australia', Functional Ecology, vol.37, no.4, pp 1126-1139

Maisnam P, Jeffries TC, Szejgis J, Bristol D, Singh BK, Eldridge DJ, Horn S, Chieppa J, Nielsen UN, (2023) 'Severe Prolonged Drought Favours Stress-Tolerant Microbes in Australian Drylands', Microbial Ecology, vol.86, no.4, pp 3097 - 3110

Song HX, Liu ZY, Cui HW, Chen JW, Chen SY, Gao HN, Yang XL, Wang YJ, Wang JJ, Liu K, Xiao S, An LZ, Nielsen UN, (2023) 'Contrasting influences of two dominant plants, Dasiphora fruticosa and Ligularia virguarea, on aboveground and belowground communities in an alpine meadow', Frontiers in Microbiology, vol.14, Article no.1118789

Yang TX, Zhong XY, Chen JD, Nielsen UN, Ochoa-Hueso R, Qu YA, Sui YS, Gao WF, Sun W, (2023) 'Ecosystem-level decoupling in response to reduced precipitation frequency and degradation in steppe grassland', Functional Ecology, vol.37, no.11, pp 2910-2926

Aryal S, Nielsen UN, Sumaya NH, De Faveri S, Wilson C, Riegler M, (2022) 'Isolation and molecular characterization of five entomopathogenic nematode species and their bacterial symbionts from eastern Australia', BioControl, vol.67, pp 63-74

Aryal S, Nielsen UN, Sumaya NH, Wilson C, Riegler M, (2022) 'Effect of temperature on survival of Australian entomopathogenic nematodes and their virulence against the Queensland fruit fly, Bactrocera tryoni', Biocontrol, vol.67, no6, pp 617-628

Aryal S, Nielsen UN, Sumaya NH, Wilson C, Riegler M, (2022) 'Virulence, penetration rate and reproductive potential of entomopathogenic nematodes from eastern Australia in Queensland fruit fly, Bactrocera tryoni', Biological Control, vol.169, Article no.104871

Ball BA, Convey P, Feeser KL, Nielsen UN, Van Horn DJ, (2022) 'Environmental harshness mediates the relationship between aboveground and belowground communities in Antarctica', Soil Biology and Biochemistry, vol.164, Article no.108493

Chieppa J, Power SA, Nielsen UN, Tissue DT, (2022) 'Plant functional traits affect competitive vigor of pasture grasses during drought and following recovery', Ecosphere, vol.13, no.7, Article no.e4156

Eldridge DJ, Oliver I, Powell JR, Dorrough J, Carrillo Y, Nielsen UN, Macdonald CA, Wilson B, Fyfe C, Amarasinghe A, Kuginis L, Peake T, Robinson T, Howe B, Delgado-Baquerizo M, (2022) 'Temporal dynamics in biotic and functional recovery following mining', Journal of Applied Ecology, vol.59, no.6, pp 1632-1643

Hassan K, Carrillo Y, Nielsen UN, (2022) 'Prolonged drought causes negative plant-soil feedbacks in grassland species under field conditions', Soil Biology and Biochemistry, vol.172, Article no.108772

Hassan K, Dastogeer KMG, Carrillo Y, Nielsen UN, (2022) 'Climate change-driven shifts in plant-soil feedbacks: a meta-analysis', Ecological Processes, vol.11, no.1, Article no.64

Kopittke PM, Berhe AA, Carrillo Y, Cavagnaro TR, Chen DL, Chen QL, Dobarco MR, Dijkstra FA, Field DJ, Grundy MJ, He JZ, Hoyle FC, Kogel-Knabner I, Lam SK, Marschner P, Martinez C, McBratney AB, McDonald-Madden E, Menzies NW, Mosley LM, Mueller CW, Murphy DV, Nielsen UN, O'Donnell AG, Pendall E, Pett-Ridge J, Rumpel C, Young IM, Minasny B, (2022) 'Ensuring planetary survival: the centrality of organic carbon in balancing the multifunctional nature of soils', Critical Reviews in Environmental Science and Technology, vol.52, no.23, pp 4308-4324

McCarthy JS, Wallace SMN, Brown KE, King CK, Nielsen UN, Allinson G, Reichman SM, (2022) 'Preliminary investigation of effects of copper on a terrestrial population of the antarctic rotifer Philodina sp', Chemosphere, vol.300, Article no.134413

Plett JM, Sabotic J, Vogt E, Snijders F, Kohler A, Nielsen UN, Kunzler M, Martin F, Veneault-Fourrey C, (2022) 'Mycorrhiza-induced mycocypins of Laccaria bicolor are potent protease inhibitors with nematotoxic and collembola antifeedant activity', Environmental Microbiology, vol.24, no.10, pp 4607-4622

Proesmans W, Andrews C, Gray A, Griffiths R, Keith A, Nielsen UN, Spurgeon D, Pywell R, Emmett B, Vanbergen AJ, (2022) 'Long-term cattle grazing shifts the ecological state of forest soils', Ecology and Evolution, vol.12, no.4, Article no.e8786

Ross GM, Berg MP, Salmon S, Nielsen UN, (2022) 'Phylogenies of traits and functions in soil invertebrate assemblages', Austral Ecology, vol.47, no.3, pp 465-481

Chen Y, Zhang Y, Nielsen UN, Ma Q, Zhang X, Huang X, Pan D, Yue X, Liu J, Wang D, (2021) 'Cattle grazing mitigates the negative impacts of nitrogen addition on soil nematode communities', Ecological Indicators, vol.129, Article no.107876

Gilarte P, Pendall E, Carrillo Y, Nielsen UN, (2021) 'Plant functional identity has predictable effects on nematode communities across successional stages', Soil Biology and Biochemistry, vol.162, Article no.108406

Hassan K, Carrillo Y, Nielsen UN, (2021) 'The effect of prolonged drought legacies on plant–soil feedbacks', Journal of Vegetation Science, vol.32, no.6, e13100

Yang X, Wang X, Xiao S, Liu Z, Zhou X, Du G, Liu K, Wang Y, Chen S, Nielsen UN, (2021) 'Dominant plants affect litter decomposition mainly through modifications of the soil microbial community', Soil Biology and Biochemistry, vol.161, Article number 108399

Chieppa J, Power SA, Tissue DT, Nielsen UN, (2020) 'Allometric Estimates of Aboveground Biomass Using Cover and Height Are Improved by Increasing Specificity of Plant Functional Groups in Eastern Australian Rangelands', Rangeland Ecology & Management, vol.73, no.3, pp 375-383

Deveautour C, Chieppa J, Nielsen UN, Boer MM, Mitchell C, Horn S, Power SA, Guillen A, Bennett AE,  Powell JR, (2020) 'Biogeography of arbuscular mycorrhizal fungal spore traits along an aridity gradient, and responses to experimental rainfall manipulation', Fungal Ecology, vol.46, SI, Article no.UNSP 100899

Gilarte P, Plett J, Pendall E, Carrillo Y, Nielsen UN, (2020) 'Direct and indirect trophic interactions of soil nematodes impact chickpea and oat nutrition', Plant and Soil, vol.457, pp 255–268

Jiang M, Medlyn BE, Drake JE, Duursma RA, Anderson IC, Barton CVM, Boer MM, Carrillo Y, Castaneda-Gomez L, Collins L, Crous KY, De Kauwe MG, dos Santos BM, Emmerson KM, Facey SL, Gherlenda AN, Gimeno TE, Hasegawa S, Johnson SN, Kannaste A, Macdonald CA, Mahmud K, Moore BD, Nazaries L, Neilson EHJ, Nielsen UN, Niinemets U, Noh NJ, Ochoa-Hueso R, Pathare VS, Pendall E, Pihlblad J, Pineiro J, Powell JR, Power SA, Reich PB, Renchon AA, Riegler M, Rinnan R, Rymer PD, Salomon RL, Singh BK, Smith B, Tjoelker MG, Walker JKM, Wujeska-Klause A, Yang JY, Zaehle S, Ellsworth DS, (2020) 'The fate of carbon in a mature forest under carbon dioxide enrichment', Nature, vol.580, no.7802, pp 227-231

Nielsen UN, Stafford-Smith M, Metternicht GI, Ash A, Baumber A, Boer MM, Booth S, Burnside D, Churchill AC, El Hassan M, Friedel MH, Godde CM, Kelly D, Kelly M, Leys JF, McDonald SE, Maru YT, Phelps DG, Ridges M, Simpson G, Traill B, Walker B, Waters CM, Whyte AW, (2020) 'Challenges, solutions and research priorities for sustainable rangelands', Rangeland Journal, vol.42, no.5, pp 359-373

Phillips LM, Aitkenhead I, Janion-Scheepers C, King CK, McGeoch MA, Nielsen UN, Terauds A, Liu WPA, Chown SL, (2020) 'Basal tolerance but not plasticity gives invasive springtails the advantage in an assemblage setting', Conservation Physiology, vol.8, Article no.coaa049

Ross GM, Horn S, Macdonald CA, Powell JR, Reynolds JK, Ryan MM, Cook JM, Nielsen UN, (2020) 'Metabarcoding mites: Three years of elevated CO2 has no effect on oribatid assemblages in a Eucalyptus woodland', Pedobiologia, vol.81-82, Article no.150667

van den Hoogen J, Geisen S, Wall DH, Wardle DA, Traunspurger W, de Goede RGM, Adams BJ, Ahmad W, Ferris H, Bardgett RD, Bonkowski M, Campos-Herrera R, Cares JE, Caruso T, de Brito Caixeta L, Chen X, Costa SR, Creamer R, da Cunha e Castro JM, Dam M, Djigal D, Escuer M, Griffiths BS, Gutiérrez C, Hohberg K, Kalinkina D, Kardol P, Kergunteuil A, Korthals G, Krashevska V, Kudrin AA, Li Q, Liang W,  Magilton M, Marais M, Martín JAR, Matveeva E, Mayad EH, Mzough E, Mulder C, Mullin P, Neilson R, Nguyen TAD, Nielsen UN, Okada H, Rius JEP, Pan K, Peneva V, Pellissier L, da Silva JCP, Pitteloud C, Powers TO, Powers K, Quist CW, Rasmann S, Moreno SS, Scheu S, Setälä H, Sushchuk A, Tiunov AV, Trap J, Vestergård M, Villenave C, Waeyenberge L, Wilschut RA, Wright DG, Keith AM, Yang J-I, Schmidt O, Bouharroud R, Ferji Z, van der Putten WH, Routh D, Crowther TW, (2020) 'A global database of soil nematode abundance and functional group composition', Scientific Data, vol.7, no.1, Article no.103

Caruso T, Hogg ID, Nielsen UN, Bottos EM, Lee CK, Hopkins DW, Cary SC, Barrett JE, Allan Green TG, Storey BC, Wall DH, Adams BJ, (2019) 'Nematodes in a polar desert reveal the relative role of biotic interactions in the 1 coexistence of soil animals', Communications Biology, vol.2, Article no.63

Chieppa J, Nielsen UN, Tissue DT, Power SA, (2019) 'Drought and phosphorus affect productivity of a mesic grassland via shifts in root traits of dominant species', Plant and Soil, vol.444, no.s 1-2, pp 457-473

Lee CK, Laughlin DC, Bottos EM, Caruso T, Joy K, Barrett JE, Brabyn L, Nielsen UN, Adams BJ, Wall DH, Hopkins DW, Pointing SB, McDonald IR, Cowan DA, Banks JC, Stichbury GA, Jones I, Zawar-Reza P, Katurji M, Hogg ID, Sparrow AD, Storey BC, Allan Green TG, Cary SC, (2019) 'Biotic interactions are an unexpected yet critical control on the complexity of an abiotically driven polar ecosystem', Communications Biology, vol.2, Article no.62

van den Hoogen J, Geisen S, Routh D, Ferris H, Traunspurger W, Wardle DA, de Goede RGM, Adams BJ, Ahmad W, Andriuzzi WS, Bardgett RD, Bonkowski M, Campos-Herrera R, Cares JE, Caruso T, Caixeta LD, Chen XY, Costa SR, Creamer R, Castro JMD, Dam M, Djigal D, Escuer M, Griffiths BS, Gutierrez C, Hohberg K, Kalinkina D, Kardol P, Kergunteuil A, Korthals G, Krashevska V, Kudrin AA, Li, Q; Liang WJ, Magilton M, Marais M, Martin JAR, Matveeva E, Mayad E, Mulder C, Mullin P, Neilson R, Nguyen TAD, Nielsen UN, Okada H, Rius JEP, Pan K, Peneva V, Pellissier L, da Silva JCP, Pitteloud C, Powers TO, Powers K, Quist CW, Rasmann S, Moreno SS, Scheu S, Setala H, Sushchuk A, Tiunov AV, Trap J, van der Putten W, Vestergard M, Villenave C, Waeyenberge L, Wall DH, Wilschut R, Wright DG, Yang JI, Crowther TW, (20129) 'Soil nematode abundance and functional group composition at a global scale', Nature, vol.572, no.7768, pp 194-198

Wang X, Xiao S, Yang X, Liu Z, Zhou X, Du G, Zhang L, Guo A, Chen S, Nielsen UN, (2019) 'Dominant plant species influence nematode richness by moderating understory diversity and microbial assemblages', Soil Biology and Biochemistry, vol.137, Article no.107566

Gutt J, Isla E, Bertler AN, Bodeker GE, Bracegirdle TJ, Cavanagh RD, Comiso JC, Convey P, Cummings V, De Conto R, De Master D, di Prisco G, d'Ovidio F, Griffiths HJ, Khan AL, Lopez-Martinez J, Murray AE, Nielsen UN, Ott S, Post A, Ropert-Coudert Y, Saucede T, Scherer R, Schiaparelli S, Schloss IR, Smith CR, Stefels J, Stevens C, Strugnell JM, Trimborn S, Verde C, Verleyen E, Wall DH, Wilson NG, Xavier JC, (2018) 'Cross-disciplinarity in the advance of Antarctic ecosystem research', Marine Genomics, vol.37, pp 1-17

Jeffries TC, Rayu S, Nielsen UN, Lai KT, Ijaz A, Nazaries L, Singh BK, (2018) 'Metagenomic Functional Potential Predicts Degradation Rates of a Model Organophosphorus Xenobiotic in Pesticide Contaminated Soils', Frontiers in Microbiology, vol.9, Article no.147

Johnson SN, Lopaticki G, Aslam TJ, Barnett K, Frew A, Hartley SE, Hiltpold I, Nielsen UN, Ryalls JMW, (2018) 'Dryland management regimes alter forest habitats and understory arthropod communities', Annals of Applied Biology, vol.172, no.3, pp 282-294

Wang XT, Nielsen UN, Yang XL, Zhang LM, Zhou XH, Du GZ, Li GX, Chen SY, Xiao S, (2018) 'Grazing induces direct and indirect shrub effects on soil nematode communities', Soil Biology & Biochemistry, vol.121, pp 193-201

Drigo B, Nielsen UN, Jeffries TC, Curlevski NJA, Singh BK, Duursma RA, Anderson IC, (2017) 'Interactive effects of seasonal drought and elevated atmospheric carbon dioxide concentration on prokaryotic rhizosphere communities', Environmental Microbiology, vol.19, no.8, pp 3175-3185, Special Issue: SI

Jiang MK, Felzer BS, Nielsen UN, Medlyn BE, (2017) 'Biome-specific climatic space defined by temperature and precipitation predictability', Global Ecology and Biogeography', vol.26, no.11, pp 1270-1282

Rayu S, Nielsen UN, Nazaries L, Singh BK, (2017) 'Isolation and Molecular Characterization of Novel Chlorpyrifos and 3,5,6-trichloro-2-pyridinol-degrading Bacteria from Sugarcane Farm Soils', Frontiers in Microbiology, vol.8, Article no.518

Frew A, Barnett K, Riegler M, Nielsen UN, Johnson SN, (2016) 'Belowground ecology of scarabs feeding on grass roots: current knowledge and future directions for management in Australasia', Frontiers in Plant Science, vol.7, p 321

Lyons WB, Deuerling K, Welch KA, Welch SA, Michalski G, Walters WW, Nielsen U, Wall DH, Hogg I, Adams BJ, (2016) 'The Soil Geochemistry in the Beardmore Glacier Region, Antarctica: Implications for Terrestrial Ecosystem History', Scientific Reports, vol.6, Article no.26189

Power SA, Barnett KL, Ochoa-Hueso R, Facey SL, Gibson-Forty EVJ, Hartley SE, Nielsen UN, Tissue DT, Johnson SN, (2016) 'DRI-Grass: A new experimental platform for addressing grassland ecosystem responses to future precipitation scenarios in South-East Australia', Frontiers in Plant Science, vol.7, Article no.1373

Soong JL, Nielsen UN, (2016) 'The role of microarthropods in emerging models of soil organic matter', Soil Biology & Biochemistry, vol.102, pp 37-39, SI

Soong JL, Vandegehuchte ML, Horton AJ, Nielsen UN, Denef K, Shaw EA, de Tomasel CM, Parton W, Wall DH, Cotrufo MF, (2016) 'Soil microarthropods support ecosystem productivity and soil C accrual: Evidence from a litter decomposition study in the tallgrass prairie', Soil Biology and Biochemistry, vol.92, pp 230-238

Torode MD, Barnett KL, Facey SL, Nielsen UN, Power SA, Johnson SN, (2016) 'Altered precipitation impacts on above-and below-ground grassland invertebrates: Summer drought leads to outbreaks in spring', Frontiers in Plant Science, vol.7, Article no.1468

Aslam TJ, Benton TG, Nielsen UN, Johnson SN, (2015) 'Impacts of eucalypt plantation management on soil faunal communities and nutrient bioavailability: trading function for dependence?', Biology and Fertility of Soils, vol.51, no.5, pp 637-644

Bennett JR, Shaw JD, Terauds A, Smol JP, Aerts R, Bergstrom DM, Blais JM, Cheung WWL, Chown SL, Lea M-A, Nielsen UN, Pauly D, Reimer KJ, Riddle MJ, Snape I, Stark JS, Tulloch VJ, Possingham HP, (2015) 'Polar lessons learned: informing long-term management based on shared threats in Arctic and Antarctic environments', Frontiers in Ecology and the Environment, vol.13, pp 316-324

Hu J, Wu JH, Ma MJ, Nielsen UN, Wang J, Du GZ, (2015) 'Nematode communities response to long-term grazing disturbance on Tibetan plateau', European Journal of Soil Biology, vol.69, pp 24-32

Nielsen UN, (2015) 'Nematodes as indicators of ecosystem responses to altered precipitation regimes: Observed responses and future perspectives', Journal of Nematology, vol.47, no.3, pp 259-259

Nielsen UN, Ball BA, (2015) 'Impacts of altered precipitation regimes on soil communities and biogeochemistry in arid and semi-arid ecosystems', Global Change Biology, vol.21, pp 1407-1421

Nielsen UN, King CA, (2015) 'Abundance and diversity of soil invertebrates in the Windmill Islands region, East Antarctica', Polar Biology, vol.38, pp 1391-1400

Nielsen UN, Prior S, Delroy B, Walker JKM, Ellsworth DS, Powell JR, (2015) 'Response of belowground communities to short-term phosphorus addition in a phosphorus-limited woodland', Plant and Soil, vol.391, no.1-2, pp 321-331

Nielsen UN, Wall DH, Six J, (2015) 'Soil Biodiversity and the Environment', Annual Review of Environment and Resources, vol.40, pp 63-90

Vandegehuchte ML, Sylvain ZA, Reichmann LG, De Tomasel CM, Nielsen UN, Wall DH, Sala OE, (2015) 'Responses of a desert nematode community to changes in water availability', Ecosphere, vol.6, no.3, Article no.44

Wall DH, Nielsen UN, Six J, (2015) 'Soil biodiversity and human health', Nature, vol.528, pp.69-76

Cotrufo MF, Soong J, Vandegehuchte ML, Nguyen T, Denef K, Shaw A, Sylvain ZA, de Tomasel CM, Nielsen UN, Wall DH, (2014) 'Naphthalene addition to soil surfaces: A feasible method to reduce soil micro-arthropods with negligible direct effects on soil C dynamics', Applied Soil Ecology, vol.74, pp 21-29

Langford EA, Nielsen UN, Johnson SN, Riegler M, (2014) 'Susceptibility of Queensland fruit fly, Bactrocera tryoni (Froggatt) (Diptera: Tephritidae), to entomopathogenic nematodes', Biological Control, vol.69, pp 34-39

Levy JS, Fountain AG, Gooseff MN, Barrett JE, Vantreese R, Welch KA, Lyons WB, Nielsen UN, Wall DH, (2014) 'Water track modification of soil ecosystems in the Lake Hoare basin, Taylor Valley, Antarctica', Antarctic Science, vol.26, pp 153-162

Nielsen UN, Ayres E, Wall DH, Li G, Bardgett RD, Wu T, Garey JR, (2014) 'Global-scale patterns of assemblage structure of soil nematodes in relation to climate and ecosystem properties', Global Ecology and Biogeography, vol.23, no.9, pp 968–978

Frew A, Nielsen UN, Riegler M, Johnson SN, (2013) 'Do eucalypt plantation management practices create understory reservoirs of scarab beetle pests in the soil?', Forest Ecology and Management, vol.306, pp 275-280

Nielsen UN, Wall DH, (2013) 'The future of soil invertebrate communities in polar regions: Different climate change responses in the Arctic and Antarctic?' Ecology Letters, vol.16, no.3, pp 409-419

Fierer N, Leff JW, Adams BJ, Nielsen UN, Bates ST, Lauber CL, Owens S, Gilbert JA, Wall DH, Caporaso JG, (2012) 'Cross-biome metagenomic analyses of soil microbial communities and their functional attributes', Proceedings of the National Academy of Sciences of the United States of America, vol.109, no.52, pp 21390-21395

Johnson SN, Nielsen UN, (2012) 'Foraging in the Dark - Chemically Mediated Host Plant Location by Belowground Insect Herbivores', Journal of Chemical Ecology, vol.38, no.6, pp 604-614

Nielsen UN, Osler GHR, Campbell CD, Burslem DFRP, van der Wal R, (2012) 'Predictors of fine-scale spatial variation in soil mite and microbe community composition differ between biotic groups and habitats', Pedobiologia, vol.55, no.2, pp 83-91

Nielsen UN, Wall DH, Adams BJ, Virginia RA, Ball BA, Gooseff MN, McKnight DM, (2012) 'The ecology of pulse events: insights from an extreme climatic event in a polar desert ecosystem', Ecosphere, vol.3, no.2, Article 17

Smith TE, Wall DH, Hogg ID, Adams BJ, Nielsen UN, Virginia RA, (2012) 'Thawing permafrost alters nematode populations and soil habitat characteristics in an Antarctic polar desert ecosystem',  Pedobiologia, vol.55, no.2, pp 75-81

Stanish LF, Kohler TJ, Esposito RMM, Simmons BL, Nielsen UN, Wall DW, Nemergut DR, McKnight DM, (2012) 'Extreme streams: flow intermittency as a control on diatom communities in meltwater streams in the McMurdo Dry Valleys, Antarctica', Canadian Journal of Fisheries and Aquatic Sciences, vol.69, no.8, pp 1405-1419

Wall DH, Nielsen UN, (2012) 'Biodiversity and ecosystem services; is it the same belowground?', Nature Education Knowledge, vol.3, no.12, p 8

Nielsen UN, Ayres E, Wall DH, Bardgett RD, (2011) 'Soil biodiversity and carbon cycling: a synthesis of studies examining diversity-function relationships', European Journal of Soil Science, vol.62, no.1, pp 105-116

Nielsen UN, Wall DH, Adams BJ, Virginia RA, (2011) 'Antarctic nematode communities: observed and predicted responses to climate change', Polar Biology, vol.34, no.11, pp 1701-1711

Nielsen UN, Wall DH, Toro M, Adams BJ, Virginia RA, (2011) 'Nematode communities of Byers Peninsula, Livingston Island, maritime Antarctica', Antarctic Science, vol.23, no.4, pp 349-357, doi:10.1017/S0954102011000174

EucalyptusNielsen UN, Osler GHR, Campbell CD, Neilson R, Burslem DFRP, Van der Wal R, (2010) 'The enigma of soil animal species diversity revisited: the role of small-scale heterogeneity', PLoS ONE 5(7): e11567. doi:10.1371/journal.pone.0011567

Nielsen UN, Osler GHR, Campbell CD, Burslem DFRP, Van der Wal R, (2010) 'The influence of vegetation type, soil properties and precipitation on the composition of soil mite and microbial communities at the landscape scale', Journal of Biogeography, vol.37, no.7, pp 1317-1328

Nielsen UN, Osler GHR, Van der Wal R, Campbell CD, Burslem DFRP, (2008) 'Soil pore volume and the abundance of soil mites in two contrasting habitats', Soil Biology & Biochemistry, vol.40, no.6, pp 1538-1541

Nielsen UN, Riis T, Brix H, (2006) 'The effect of weed cutting on Luronium natans', Aquatic Conservation-Marine and Freshwater Ecosystems, vol.16, no.1, pp 409-417

Nielsen UN, Riis T, Brix H, (2006) 'The importance of vegetative and sexual dispersal of Luronium Natans', Aquatic Botany, vol.84, no.2, pp 165-170

Conference Proceeding

Levy J, Fountain A, Gooseff MN, Barrett JE, Wall DN, Nielsen UN, Adams BJ, Lyons WB, (2012) 'Active Layer Processes in the McMurdo Dry Valleys, Antarctica: Decadal Trends and Experimental Responses to Changes in Soil Moisture' In: Hinkel, K.M. (ed.). Tenth International Conference on Permafrost. Vol. 1: International Contributions. The Northern Publisher, Salekhard, Russia, pages 221-226.

Eucalyptus Leaf