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  1. Effects of earthworms on microbial community structure, functionality and soil properties in soil cover treatments for mine tailings rehabilitation

    Article • European Journal of Soil Biology, March 2024, Elsevier

    Professor Olaf Schmidt

  2. Extracting DNA from soil or directly from isolated nematodes indicate dissimilar community structure for Europe-wide forest soils

    Article • Soil Biology and Biochemistry, October 2023, Elsevier

    Professor Olaf Schmidt

  3. Verifying origin claims on dairy products using stable isotope ratio analysis and random forest classification

    Article • Food Chemistry X, October 2023, Elsevier

    Professor Olaf Schmidt

  4. Invertebrate communities (Collembola and Acari) in soil cover treatments for mine tailings in a long‐term field experiment

    Article • Land Degradation and Development, June 2023, Wiley

    Professor Olaf Schmidt

  5. Isolation of casein for stable isotope ratio analysis of butter, cheese, and milk powder

    Article • Rapid Communications in Mass Spectrometry, January 2023, Wiley

    Professor Olaf Schmidt

  6. Bacterial Keystone Taxa Regulate Carbon Metabolism in the Earthworm Gut

    Article • Microbiology Spectrum, October 2022, ASM Journals

    Professor Olaf Schmidt

  7. Correction to: Gunnera tinctoria invasions increase, not decrease, earthworm abundance and diversity

    Article • Biological Invasions, September 2022, Springer Science + Business Media

    Professor Olaf Schmidt

  8. Gunnera tinctoria invasions increase, not decrease, earthworm abundance and diversity

    Article • Biological Invasions, July 2022, Springer Science + Business Media

    Professor Olaf Schmidt

  9. Testing numeric and logarithmic scales for hydraulic-energy indices and functions to assess physical earthworm effects on soil structure

    Article • Geoderma Regional, March 2022, Elsevier

    Professor Olaf Schmidt

  10. Rapid transfer of C and N excreted by decomposer soil animals to plants and above-ground herbivores

    Article • Soil Biology and Biochemistry, March 2022, Elsevier

    Professor Olaf Schmidt

  11. Stable isotope ratio analysis for the authentication of milk and dairy ingredients: A review

    Article • International Dairy Journal, March 2022, Elsevier

    Professor Olaf Schmidt

  12. Corrigendum to “Molecular data confirms the existence of distinct lineages within Lumbricus friendi (Cognetti 1904) and related “friends” [Eur. J. Soil Biol. 108 (2022) 103382]

    Article • European Journal of Soil Biology, March 2022, Elsevier

    Professor Olaf Schmidt

  13. Feeding habits and multifunctional classification of soil‐associated consumers from protists to vertebrates

    Article • Biological Reviews, January 2022, Wiley

    Professor Olaf Schmidt

  14. Molecular data confirms the existence of distinct lineages within Lumbricus friendi (Cognetti 1904) and related “friends”

    Article • European Journal of Soil Biology, January 2022, Elsevier

    Professor Olaf Schmidt

  15. Comparison of two image analysis software for root trait analysis of single and mixed species grasslands

    Article • The Plant Phenome Journal, January 2022, Wiley

    Professor Olaf Schmidt

  16. Evaluating the impact of pyrethroid insecticide resistance on reproductive fitness in Sitobion avenae

    Article • Annals of Applied Biology, October 2021, Wiley

    Professor Olaf Schmidt

  17. Dinotefuran alters Collembola-fungi-bacteria interactions that control mineralization of maize and soil organic carbon

    Article • Journal of Hazardous Materials, September 2021, Elsevier

    Professor Olaf Schmidt

  18. Global data on earthworm abundance, biomass, diversity and corresponding environmental properties

    Article • Scientific Data, May 2021, Springer Science + Business Media

    Professor Olaf Schmidt, Pr Jean-François Ponge, Prof Christian Mulder

  19. Soil Meso‐ and Macrofauna Indicators of Restoration Success in Rehabilitated Mine Sites

    Article • May 2021, Wiley

    Professor Olaf Schmidt

  20. Stable isotope profile (C, N, O, S) of Irish raw milk: Baseline data for authentication

    Article • Food Control, March 2021, Elsevier

    Professor Olaf Schmidt

  21. Use of deep learning for structural analysis of computer tomography images of soil samples

    Article • Royal Society Open Science, March 2021, Royal Society Publishing

    Professor Olaf Schmidt

  22. Methods and approaches to advance soil macroecology

    Article • Global Ecology and Biogeography, August 2020, Wiley

    Professor Olaf Schmidt

  23. Erratum for the Report “Global distribution of earthworm diversity” by H. R. P. Phillips, C. A. Guerra, M. L. C. Bartz, M. J. I. Briones, G. Brown, T. W. Crowther, O. Ferlian, K. B. Gongalsky, J. van den Hoogen, J. Krebs, A. Orgiazzi, D. Routh, B. Schw...

    Article • Science, July 2020, American Association for the Advancement of Science

    Professor Olaf Schmidt, Pr Jean-François Ponge

  24. Comparison of the mustard oil and electrical methods for sampling earthworm communities in rural and urban soils

    Article • Urban Ecosystems, July 2020, Springer Science + Business Media

    Professor Olaf Schmidt

  25. Evidence for substantial acetate presence in cutaneous earthworm mucus

    Article • Journal of Soils and Sediments, June 2020, Springer Science + Business Media

    Professor Olaf Schmidt

  26. A global database of soil nematode abundance and functional group composition

    Article • Scientific Data, March 2020, Springer Science + Business Media

    Prof Christian Mulder, Professor Olaf Schmidt

  27. In-field prevalence of resistant grain aphid Sitobion avenae (Fabricius)

    Article • Biology & Environment Proceedings of the Royal Irish Academy, January 2020, Royal Irish Academy

    Professor Olaf Schmidt

  28. Influence of dung pats on soil physical quality mediated by earthworms: from dung deposition to decay and beyond

    Article • Soil Research, January 2020, CSIRO Publishing

    Professor Olaf Schmidt

  29. Consequences of land-use changes for soil quality and function, with a focus on the EU and Latin America

    Article • January 2020, Elsevier

    Professor Olaf Schmidt

  30. Global distribution of earthworm diversity

    Article • Science, October 2019, American Association for the Advancement of Science

    Pr Jean-François Ponge, Prof Christian Mulder, Professor Olaf Schmidt

  31. Ash application enhances decomposition of recalcitrant organic matter

    Article • Soil Biology and Biochemistry, August 2019, Elsevier

    Professor Olaf Schmidt

  32. Host identification in unfed ticks from stable isotope compositions (δ 13 C and δ 15 N)

    Article • Medical and Veterinary Entomology, March 2019, Wiley

    Professor Olaf Schmidt

  33. Comparison of Soil Physical Quality Indicators Using Direct and Indirect Data Inputs Derived from a Combination of In-Situ and Ex-Situ Methods

    Article • Soil Science Society of America Journal, January 2019, Wiley

    Professor Olaf Schmidt

  34. Soil properties and earthworm populations associated with bauxite residue rehabilitation strategies

    Article • Environmental Science and Pollution Research, December 2018, Springer Science + Business Media

    Professor Olaf Schmidt

  35. The impact of cattle dung pats on earthworm distribution in grazed pastures

    Article • BMC Ecology, December 2018, Springer Science + Business Media

    Professor Olaf Schmidt

  36. The fatty acid profile and stable isotope ratios of C and N of muscle from cattle that grazed grass or grass/clover pastures before slaughter and their discriminatory potential

    Article • Irish Journal of Agricultural and Food Research, November 2018, De Gruyter

    Aidan Moloney, Professor Olaf Schmidt

  37. Release of plant-available silicon from various silicon-rich amendments into soil solutions and leachates

    Article • Journal of Soils and Sediments, October 2018, Springer Science + Business Media

    Professor Olaf Schmidt

  38. Meat provenance: Authentication of geographical origin and dietary background of meat

    Article • Meat Science, May 2018, Elsevier

    Professor Olaf Schmidt

  39. Effects of silicon-rich soil amendments on growth, mortality and bark feeding damage of Sitka spruce (Picea sitchensis) seedlings under field conditions

    Article • Scandinavian Journal of Forest Research, March 2018, Taylor & Francis

    Professor Olaf Schmidt

  40. Silicon concentrations in soil and bark in Irish Sitka spruce forests

    Article • Journal of Plant Nutrition and Soil Science, January 2018, Wiley

    Professor Olaf Schmidt

  41. Consequences of anecic earthworm removal over 18 months for earthworm assemblages and nutrient cycling in a grassland

    Article • Pedobiologia, January 2018, Elsevier

    Professor Olaf Schmidt

  42. The Living Soil: Biodiversity and Functions

    Article • January 2018, Springer Science + Business Media

    Professor Olaf Schmidt

  43. Priorities for research in soil ecology

    Article • Pedobiologia, July 2017, Elsevier

    Professor Olaf Schmidt

  44. Earthworm populations in twelve cover crop and weed management combinations

    Article • Applied Soil Ecology, June 2017, Elsevier

    Professor Olaf Schmidt

  45. Tillage farming damaging earthworm populations

    Article • Global Change Biology, May 2017, Wiley

    Maria J.I. Briones, Professor Olaf Schmidt

  46. Soil networks become more connected and take up more carbon as nature restoration progresses

    Article • Nature Communications, February 2017, Nature

    Professor Olaf Schmidt

  47. Nannipieri, P.et al., 2003. Microbial diversity and soil functions.European Journal of Soil Science, 54, 655-670.

    Article • European Journal of Soil Science, January 2017, Wiley

    Professor Olaf Schmidt

  48. Selecting cost effective and policy-relevant biological indicators for European monitoring of soil biodiversity and ecosystem function

    Article • Ecological Indicators, October 2016, Elsevier

    Prof Christian Mulder, Professor Olaf Schmidt

  49. Stable isotope analysis (δ13C andδ15N) of soil nematodes from four feeding groups

    Article • PeerJ, September 2016, PeerJ

    Professor Olaf Schmidt

  50. Earthworm functional traits and interspecific interactions affect plant nitrogen acquisition and primary production

    Article • Applied Soil Ecology, August 2016, Elsevier

    Professor Olaf Schmidt

  51. Soil stewardship as a nexus between Ecosystem Services and One Health

    Article • Ecosystem Services, February 2016, Elsevier

    Professor Olaf Schmidt

  52. Soil algae in soil food webs

    Article • Proceedings of the Royal Society B Biological Sciences, January 2016, Royal Society Publishing

    Professor Olaf Schmidt

  53. Mapping earthworm communities in Europe

    Article • Applied Soil Ecology, January 2016, Elsevier

    Prof Christian Mulder, Professor Olaf Schmidt

  54. Organic matter composition and the protist and nematode communities around anecic earthworm burrows

    Article • Biology and Fertility of Soils, September 2015, Springer Science + Business Media

    Professor Olaf Schmidt

  55. Anecic earthworms (Lumbricus terrestris) alleviate negative effects of extreme rainfall events on soil and plants in field mesocosms

    Article • Plant and Soil, July 2015, Springer Science + Business Media

    Professor Olaf Schmidt

  56. Isotopic composition of sheep wool records seasonality of climate and diet

    Article • Rapid Communications in Mass Spectrometry, June 2015, Wiley

    Professor Olaf Schmidt, Aidan Moloney

  57. Temporal variation outweighs effects of biosolids applications in shaping arbuscular mycorrhizal fungi communities on plants grown in pasture and arable soils

    Article • Applied Soil Ecology, October 2014, Elsevier

    Professor Olaf Schmidt

  58. Production of rabbit dung triple-labelled with C, N and S stable isotopes

    Article • Pedobiologia, May 2014, Elsevier

    Professor Olaf Schmidt

  59. Isotopic turnover of carbon and nitrogen in bovine blood fractions and inner organs

    Article • Rapid Communications in Mass Spectrometry, March 2014, Wiley

    Professor Olaf Schmidt

  60. Silicon reduces slug feeding on wheat seedlings

    Article • Journal of Pest Science, March 2014, Springer Science + Business Media

    Professor Olaf Schmidt

  61. Beef authentication using dietary markers: Chemometric selection and modelling of significant beef biomarkers using concatenated data from multiple analytical methods

    Article • Food Chemistry, December 2013, Elsevier

    Professor Olaf Schmidt

  62. The drilosphere concept: Fine-scale incorporation of surface residue-derived N and C around natural Lumbricus terrestris burrows

    Article • Soil Biology and Biochemistry, September 2013, Elsevier

    Professor Olaf Schmidt

  63. Permanent and new arable field margins support large earthworm communities but do not increase in-field populations

    Article • Agriculture Ecosystems & Environment, April 2013, Elsevier

    Professor Olaf Schmidt

  64. Contrasting Cu, Fe, and Zn isotopic patterns in organs and body fluids of mice and sheep, with emphasis on cellular fractionation

    Article • Metallomics, January 2013, Oxford University Press (OUP)

    Professor Olaf Schmidt

  65. Land-use and land-management change: relationships with earthworm and fungi communities and soil structural properties

    Article • BMC Ecology, January 2013, Springer Science + Business Media

    Professor Olaf Schmidt

  66. Authentication of grass-fed beef using bovine muscle, hair or urine

    Article • Trends in Food Science & Technology, December 2012, Elsevier

    Professor Olaf Schmidt

  67. Mediterranean earthworm species in Ireland

    Article • Proceedings of the Royal Society B Biological Sciences, July 2012, Royal Society Publishing

    Professor Olaf Schmidt

  68. A refined sampling strategy for intra-tooth stable isotope analysis of mammalian enamel

    Article • Geochimica et Cosmochimica Acta, May 2012, Elsevier

    Dr Robin Bendrey, Professor Olaf Schmidt

  69. Cross-taxa congruence, indicators and environmental gradients in soils under agricultural and extensive land management

    Article • European Journal of Soil Biology, March 2012, Elsevier

    Professor Olaf Schmidt

  70. Distinct microbial and faunal communities and translocated carbon in Lumbricus terrestris drilospheres

    Article • Soil Biology and Biochemistry, March 2012, Elsevier

    Professor Olaf Schmidt

  71. Biochar and Earthworm Effects on Soil Nitrous Oxide and Carbon Dioxide Emissions

    Article • Journal of Environmental Quality, January 2012, American Society of Agronomy

    Professor Olaf Schmidt

  72. Unique soil microbial assemblages associated with grassland ant species with different nesting and foraging strategies

    Article • Pedobiologia, January 2012, Elsevier

    Professor Olaf Schmidt

  73. Natural isotope signatures of host blood are replicated in moulted ticks

    Article • Ticks and Tick-borne Diseases, December 2011, Elsevier

    Professor Olaf Schmidt

  74. Sulphur isotopes in animal hair track distance to sea

    Article • Rapid Communications in Mass Spectrometry, August 2011, Wiley

    Professor Olaf Schmidt

  75. Beef Authentication and Retrospective Dietary Verification Using Stable Isotope Ratio Analysis of Bovine Muscle and Tail Hair

    Article • Journal of Agricultural and Food Chemistry, April 2011, American Chemical Society (ACS)

    Professor Olaf Schmidt

  76. Multielement Isotope Analysis of Bovine Muscle for Determination of International Geographical Origin of Meat

    Article • Journal of Agricultural and Food Chemistry, April 2011, American Chemical Society (ACS)

    Professor Olaf Schmidt

  77. α-Tocopherol stereoisomers in beef as an indicator of vitamin E supplementation in cattle diets

    Article • Food Chemistry, February 2011, Elsevier

    Professor Olaf Schmidt

  78. Tissue turnover in ovine muscles and lipids as recorded by multiple (H, C, O, S) stable isotope ratios

    Article • Food Chemistry, January 2011, Elsevier

    Professor Olaf Schmidt

  79. Effects of Biosolids at Varying Rates on Earthworms (Eisenia fetida) and Springtails (Folsomia candida)

    Article • Applied and Environmental Soil Science, January 2011, Hindawi Publishing Corporation

    Professor Olaf Schmidt

  80. The fate of slurry-N fractions in herbage and soil during two growing seasons following application

    Article • Plant and Soil, December 2010, Springer Science + Business Media

    Professor Olaf Schmidt

  81. Intra-muscular and inter-muscular variation in carbon turnover of ovine muscles as recorded by stable isotope ratios

    Article • Food Chemistry, November 2010, Elsevier

    Professor Olaf Schmidt

  82. A simple method for in situ-labelling with 15N and 13C of grassland plant species by foliar brushing

    Article • Methods in Ecology and Evolution, October 2010, Wiley

    Professor Olaf Schmidt

  83. Trophic relationships of grassland ants based on stable isotopes

    Article • Pedobiologia, July 2010, Elsevier

    Professor Olaf Schmidt

  84. The isotope record of short- and long-term dietary changes in sheep tooth enamel: Implications for quantitative reconstruction of paleodiets

    Article • Geochimica et Cosmochimica Acta, June 2010, Elsevier

    Professor Olaf Schmidt

  85. Bodily variability of zinc natural isotope abundances in sheep

    Article • Rapid Communications in Mass Spectrometry, March 2010, Wiley

    Professor Olaf Schmidt

  86. A critical review of current methods in earthworm ecology: From individuals to populations

    Article • European Journal of Soil Biology, March 2010, Elsevier

    Professor Olaf Schmidt

  87. Gut wall bacteria of earthworms: a natural selection process

    Article • The ISME Journal, November 2009, Nature

    Professor Olaf Schmidt

  88. Slurry 15NH4-N recovery in herbage and soil: effects of application method and timing

    Article • Plant and Soil, November 2009, Springer Science + Business Media

    Professor Olaf Schmidt

  89. Predatory soil nematodes (Nematoda: Mononchida) in major land-use types across Ireland

    Article • Journal of Natural History, October 2009, Taylor & Francis

    Professor Olaf Schmidt

  90. Field preservation and DNA extraction methods for intestinal microbial diversity analysis in earthworms

    Article • Journal of Microbiological Methods, March 2009, Elsevier

    Professor Olaf Schmidt

  91. Turnover of carbon, nitrogen, and sulfur in bovine longissimus dorsi and psoas major muscles: Implications for isotopic authentication of meat

    Article • Journal of Animal Science, November 2008, American Society of Animal Science (ASAS)

    Professor Olaf Schmidt

  92. Earthworm population dynamics as influenced by the quality of exogenous organic matter

    Article • Pedobiologia, October 2008, Elsevier

    Professor Olaf Schmidt

  93. Effect of age and food intake on dietary carbon turnover recorded in sheep wool

    Article • Rapid Communications in Mass Spectrometry, September 2008, Wiley

    Professor Olaf Schmidt

  94. Importance of DNA quality in comparative soil microbial community structure analyses

    Article • Soil Biology and Biochemistry, June 2008, Elsevier

    Professor Olaf Schmidt

  95. Relationships between earthworm populations and management intensity in cattle-grazed pastures in Ireland

    Article • Applied Soil Ecology, May 2008, Elsevier

    Professor Olaf Schmidt

  96. Seasonal variation in the C, N and S stable isotope composition of retail organic and conventional Irish beef

    Article • Food Chemistry, February 2008, Elsevier

    Professor Olaf Schmidt

  97. Experimental determination of dietary carbon turnover in bovine hair and hoof

    Article • Canadian Journal of Zoology, December 2007, Canadian Science Publishing

    Professor Olaf Schmidt

  98. Long-term stability of RNA in post-mortem bovine skeletal muscle, liver and subcutaneous adipose tissues

    Article • BMC Molecular Biology, January 2007, Springer Science + Business Media

    Professor Olaf Schmidt

  99. The feeding ecology of earthworms – A review

    Article • Pedobiologia, January 2007, Elsevier

    Professor Olaf Schmidt

  100. Three-dimensional growth of bovine hoof as recorded by carbon stable isotope ratios

    Article • Rapid Communications in Mass Spectrometry, January 2007, Wiley

    Professor Olaf Schmidt

  101. Using hooves for high-resolution isotopic reconstruction of bovine dietary history

    Article • Rapid Communications in Mass Spectrometry, January 2007, Wiley

    Professor Olaf Schmidt

  102. Potential use of leaf carbon isotope discrimination for the selection of shade-tolerant species

    Article • Forest Ecology and Management, December 2006, Elsevier

    Professor Olaf Schmidt

  103. Dichogaster bolaui (Oligochaeta: Octochaetidae), an unusual invader in a swimming pool in Ireland

    Article • Journal of Natural History, April 2006, Taylor & Francis

    Professor Olaf Schmidt

  104. Inferring the origin and dietary history of beef from C, N and S stable isotope ratio analysis

    Article • Food Chemistry, July 2005, Elsevier

    Professor Olaf Schmidt

  105. A simple and rapid method for labelling earthworms with 15N and 13C

    Article • Soil Biology and Biochemistry, May 2005, Elsevier

    Professor Olaf Schmidt

  106. Alteration of the carbon and nitrogen stable isotope composition of beef by substitution of grass silage with maize silage

    Article • Rapid Communications in Mass Spectrometry, January 2005, Wiley

    Professor Olaf Schmidt

  107. Dual13C,15N labelling of terrestrial slugs (Deroceras reticulatum)

    Article • Isotopes in Environmental and Health Studies, September 2004, Taylor & Francis

    Professor Olaf Schmidt

  108. Dual stable isotope analysis (δ13C and δ15N) of soil invertebrates and their food sources

    Article • Pedobiologia, March 2004, Elsevier

    Professor Olaf Schmidt

  109. Isotopic labelling of earthworms: comments on the paper by Whalen and Janzen (2002)

    Article • Soil Biology and Biochemistry, June 2003, Elsevier

    Professor Olaf Schmidt

  110. Why do cereal–legume intercrops support large earthworm populations?

    Article • Applied Soil Ecology, February 2003, Elsevier

    Professor Olaf Schmidt

  111. Relationships between earthworm populations, grassland management and badger densities in County Kilkenny, IrelandThe 7th international symposium on earthworm ecology · Cardiff · Wales · 2002

    Article • Pedobiologia, January 2003, Elsevier

    Professor Olaf Schmidt

  112. Intensive cultivation can drastically reduce earthworm populations in arable land

    Article • European Journal of Soil Biology, April 2002, Elsevier

    Professor Olaf Schmidt

  113. Article • Plant and Soil, January 2001, Springer Science + Business Media

    Professor Olaf Schmidt

  114. Intrapopulation variation in carbon and nitrogen stable isotope ratios in the earthworm Aporrectodea longa

    Article • Ecological Research, December 1999, Springer Science + Business Media

    Professor Olaf Schmidt

  115. Tracing nitrogen derived from slurry in earthworms using 15N/14N stable isotope ratios at natural abundances

    Article • Applied Soil Ecology, April 1999, Elsevier

    Professor Olaf Schmidt

  116. Carbon and nitrogen stable isotope ratios in body tissue and mucus of feeding and fasting earthworms ( Lumbricus festivus )

    Article • Oecologia, January 1999, Springer Science + Business Media

    Professor Olaf Schmidt

  117. Natural abundance of 15N and 13C in earthworms from a wheat and a wheat-clover field

    Article • Soil Biology and Biochemistry, September 1997, Elsevier

    Professor Olaf Schmidt

  118. Influence of mineral soil on the palatability of organic matter for lumbricid earthworms: A simple food preference study

    Article • Soil Biology and Biochemistry, March 1997, Elsevier

    Professor Olaf Schmidt

  119. Population dynamics of Pseudomonas corrugata 2140R lux8 in earthworm food and in earthworm casts

    Article • Soil Biology and Biochemistry, March 1997, Elsevier

    Professor Olaf Schmidt