Maureen O’Callaghan

7.9k total citations · 3 hit papers
141 papers, 5.8k citations indexed

About

Maureen O’Callaghan is a scholar working on Plant Science, Insect Science and Soil Science. According to data from OpenAlex, Maureen O’Callaghan has authored 141 papers receiving a total of 5.8k indexed citations (citations by other indexed papers that have themselves been cited), including 60 papers in Plant Science, 42 papers in Insect Science and 35 papers in Soil Science. Recurrent topics in Maureen O’Callaghan's work include Soil Carbon and Nitrogen Dynamics (34 papers), Entomopathogenic Microorganisms in Pest Control (25 papers) and Plant-Microbe Interactions and Immunity (23 papers). Maureen O’Callaghan is often cited by papers focused on Soil Carbon and Nitrogen Dynamics (34 papers), Entomopathogenic Microorganisms in Pest Control (25 papers) and Plant-Microbe Interactions and Immunity (23 papers). Maureen O’Callaghan collaborates with scholars based in New Zealand, Australia and United States. Maureen O’Callaghan's co-authors include Travis R. Glare, Leo M. Condron, Hong J. Di, Keith C. Cameron, Saman Bowatte, Ji‐Zheng He, Ju‐Pei Shen, Christopher Winefield, Steven A. Wakelin and A. Stewart and has published in prestigious journals such as PLoS ONE, Applied and Environmental Microbiology and Environmental Pollution.

In The Last Decade

Maureen O’Callaghan

135 papers receiving 5.5k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Nitrification driven by bacteria and not archaea in nitrogen-rich grassland soils

2009 737 citations Hong J. Di, Maureen O’Callaghan et al. profile →
Microbial inoculation of seed for improved crop performance: issues and opportunities

2016 320 citations Maureen O’Callaghan profile →
Soil microbial inoculants for sustainable agriculture: Limitations and opportunities

2022 231 citations Maureen O’Callaghan et al. profile →

Peers

Countries citing papers authored by Maureen O’Callaghan

Since Specialization

Citations

This map shows the geographic impact of Maureen O’Callaghan's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Maureen O’Callaghan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Maureen O’Callaghan more than expected).

Fields of papers citing papers by Maureen O’Callaghan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Maureen O’Callaghan. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Maureen O’Callaghan. The network helps show where Maureen O’Callaghan may publish in the future.

Co-authorship network of co-authors of Maureen O’Callaghan

This figure shows the co-authorship network connecting the top 25 collaborators of Maureen O’Callaghan. A scholar is included among the top collaborators of Maureen O’Callaghan based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Maureen O’Callaghan. Maureen O’Callaghan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Leading with courage and integrity in the National Science Challenges 2024 ·Journal of the Royal Society of New Zealand ·Andrea E. Byrom, (unknown), (unknown), Bruce D. Clarkson, (unknown), Maureen O’Callaghan, (unknown), Duane A. Peltzer, Rob Phillips, (unknown), Nick Waipara, (unknown)	1
2	Serratia spp. bacteria evolved in Aotearoa‐New Zealand for infection of endemic scarab beetles 2023 ·New Zealand Journal of Zoology ·Christon J. Hurst, Maureen O’Callaghan, Travis R. Glare, T.A. Jackson	1
3	Impacts of long‐term phosphorus and nitrogen fertiliser application on soil biology: a New Zealand perspective 2023 ·New Zealand Journal of Agricultural Research ·Nicole L. Schon, Bryan Stevenson, P. M. Fraser, Shengjing Shi, Craig Anderson, Sarah Mansfield, Robert Simpson, Jo Cavanagh, Kate H. Orwin, C. W. Gray, A. D. Mackay, Gavin Lear, Maureen O’Callaghan	2
4	Lysis Cassette-Mediated Exoprotein Release in Yersinia entomophaga Is Controlled by a PhoB-Like Regulator 2023 ·Microbiology Spectrum ·(unknown), Maureen O’Callaghan, Charles A. Hefer, Travis R. Glare, (unknown), Christon J. Hurst	5
5	Plant species identity and plant-induced changes in soil physicochemistry—but not plant phylogeny or functional traits - shape the assembly of the root-associated soil microbiome 2023 ·FEMS Microbiology Ecology ·(unknown), Leo M. Condron, Maureen O’Callaghan, Lauren P. Waller, Ian A. Dickie, Steven A. Wakelin	6
6	Whole genome sequencing of Penicillium and Burkholderia strains antagonistic to the causal agent of kauri dieback disease (Phytophthora agathidicida) reveals biosynthetic gene clusters related to antimicrobial secondary metabolites 2023 ·Molecular Ecology Resources ·(unknown), Leo M. Condron, Maureen O’Callaghan, Nick Waipara, Amanda Black	4
7	The response of soil microbial communities to the infection of kauri ( Agathis australis ) seedlings with Phytophthora agathidicida 2021 ·Forest Pathology ·(unknown), Leo M. Condron, Maureen O’Callaghan, Nick Waipara, Amanda Black	0
8	Identification of Burkholderia and Penicillium isolates from kauri (Agathis australis) soils that inhibit the mycelial growth of Phytophthora agathidicida 2021 ·Proceedings of the New Zealand Weed Control Conference ·(unknown), Leo M. Condron, Maureen O’Callaghan, Nick Waipara, Amanda Black	3
9	Impacts of pasture species and ruminant urine on N ₂ O emissions and nitrogen transforming microbial communities in soil mesocosms 2020 ·New Zealand Journal of Agricultural Research ·(unknown), Shengjing Shi, (unknown), Fiona Brennan, Leo M. Condron, John A. Finn, Karl G. Richards, Maureen O’Callaghan, Timothy J. Clough	6
10	In vivo transcriptome analysis provides insights into host-dependent expression of virulence factors by Yersinia entomophaga MH96, during infection of Galleria mellonella 2020 ·G3 Genes Genomes Genetics ·(unknown), Maureen O’Callaghan, Xuexian Zhang, Paul B. Rainey, Christon J. Hurst	6
11	The Next Generation of Biopesticides: Institutional barriers and enablers to co-innovation in a science and commercialisation programme 2018 ·Socio-Environmental Systems Modeling ·Kelly Rijswijk, Denise Bewsell, Maureen O’Callaghan, James Turner	2
12	Analysis of soil eDNA functional genes: potential to increase profitability and sustainability of pastoral agriculture 2016 ·New Zealand Journal of Agricultural Research ·Steven A. Wakelin, (unknown), (unknown), (unknown), Maria Tourna, (unknown), Jizhong Zhou, (unknown), Maureen O’Callaghan	12
13	Physicochemical properties of 50 New Zealand pasture soils: a starting point for assessing and managing soil microbial resources 2013 ·New Zealand Journal of Agricultural Research ·Steven A. Wakelin, Chikako van Koten, Maureen O’Callaghan, Michael Brown	26
14	Serratia entomophila bet gene induction and the impact of glycine betaine accumulation on desiccation tolerance 2012 ·Journal of Applied Microbiology ·Tamsin R. Sheen, Maureen O’Callaghan, Darren J. Smalley, Clive W. Ronson, Christon J. Hurst	5
15	Influence of photosynthetically active radiation on diurnal N ₂ O emissions under ruminant urine patches 2012 ·New Zealand Journal of Agricultural Research ·(unknown), Kelly Hamonts, Elena Moltchanova, Timothy J. Clough, (unknown), Steven A. Wakelin, Maureen O’Callaghan	12
16	Effects of past and current management practices on crop yield and nitrogen leaching—a comparison of organic and conventional cropping systems 2006 ·New Zealand Journal of Crop and Horticultural Science ·Christine H. E. Stark, Leo M. Condron, A. Stewart, Hong J. Di, Maureen O’Callaghan	9
17	Biodiversity of indigenous tussock grassland sites in Otago, Canterbury and the central North Island of New Zealand III. Soil microorganisms 2005 ·Journal of the Royal Society of New Zealand ·S.U. Sarathchandra, G. Burch, (unknown), Nick Waipara, N. R. Cox, A. Ghani, N.L. Bell, Maureen O’Callaghan, Sandra Young, B.I.P. Barratt, C.M. Ferguson, R.J. Townsend	13
18	Abundance and distribution of microbial populations in sheep fleece 2002 ·New Zealand Journal of Agricultural Research ·T.A. Jackson, (unknown), Sandra Young, John L. Armstrong, Maureen O’Callaghan	10
19	National grid of vegetation sites: reality check. 2000 ·South African Journal of Science ·Maureen O’Callaghan	3
20	Checklist of naturally occurring entomopathogenic microbes and nematodes in New Zealand 1993 ·New Zealand Journal of Zoology ·Travis R. Glare, Maureen O’Callaghan, P.J. Wigley	32

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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