Jieyun Wu PhD exam

Our PhD candidate Jieyun Wu has successfully done her doctor oral examination! A big round of applause for Dr Wu!

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The Lear group largely explores the complex interactions among microbial communities and the varied environments that they inhabit. We investigate how microbial communities adapt to human influences such as pollution events and agricultural management, as well as to natural variability in environmental conditions. A key goal of our research is to use microbial responses to such events as a quantitative indicator of the impact of human activities on environments. We have a broad-range of interests in both pure and applied aspects of environmental microbiology and are keen to help motivated individuals investigate diverse research interests, including: (i) the role of microorganisms in maintaining environmental health and productivity, (ii) advanced molecular methods to assess microbial community diversity, function and distribution, (iii) microbial diversity and biogeography, and (iv) the use of microorganisms for the bioremediation of polluted environments.

For more details regarding any of these project areas, please email Dr. Gavin Lear (g.lear@auckland.ac.nz)

(2021)

Lewe, N., Hermans, S., Lear, G., Kelly, L. T., Thomson-Laing, G., Weisbrod, B., ... & Deslippe, J. R. (2021). Phospholipid fatty acid (PLFA) analysis as a tool to estimate absolute abundances from compositional 16S rRNA bacterial metabarcoding data. Journal of Microbiological Methods, 106271.

Wu, J., Buckley, H. L., Curry, L., Stevenson, B. A., Schipper, L. A., & Lear, G. (2021). Livestock exclusion reduces the spillover effects of pastoral agriculture on soil bacterial communities in adjacent forest fragments. Environmental Microbiology.

Buckley, H. L., Day, N. J., Case, B. S., & Lear, G. (2021). Measuring change in biological communities: multivariate analysis approaches for temporal datasets with low sample size. PeerJ, 9, e11096.

Buckley, H. L., Day, N. J., Lear, G., & Case, B. S. (2021). Changes in the analysis of temporal community dynamics data: a 29-year literature review. PeerJ, 9, e11250.

Schmack, J., Lear, G., Astudillo-Garcia, C., Boyer, S., Ward, D., Beggs, J. (2021) DNA metabarcoding of prey reveals spatial, temporal, and diet partitioning of an island ecosystem by four invasive wasps. Journal of Applied Ecology.

Gambarini, V., Pantos, O., Kingsbury, J.M., Weaver, L., Handley, K.M., Lear, G. (2021) Phylogenetic distributions of plastic-degrading microorganisms DOI: 10.1128/mSystems.01112-20

Lear, G., Kingsbury, J.M., Franchini, S., Gambarini, V., Maday, S.D.M., Wallbank, J.A., Weaver, L., Pantos, O. (2021) Plastics and the microbiome: impacts and solutions. Environmental Microbiome 16 (2):

(2020)

Audrezet, F., Zaiko, A., Lear, G., Wood, S.A., Tremblay, L., Pochon, X. (2020) Biosecurity implications of drifting marine plastic debris: current knowledge and future research. Marine Pollution Bulletin

Probert, AF, Ward, D., Beggs, J., Bury, S.J., Hermans, S., Lear, G., Stanley, M. (2020) High dietary niche overlap between non-native and native ant species in natural ecosystems. Environmental Entomology

Hermans, S.M., Buckley, H.L., Curran-Cournane, F., Taylor, M., Lear, G. (2020) Temporal variation in soil bacterial communities can be compounded with spatial variation. FEMS Microbiology Ecology 96 (12): fiaa192.

Gautam, A., Lear, G., Lewis, G.D. (2020) Analysis of spatial and temporal variation in bacterial community dynamics within stream biofilm. New Zealand Journal of Marine and Freshwater Research

Hermans, S.M. Buckley, H.L., Case, B.S., Curran-Cournane, F., Taylor, M., Lear, G (2020) Using soil bacterial communities to predict physico-chemical variables and soil quality. Microbiome 8 (79): 2850.

Montenegro, D., Tremblay, L.A., Hilton, Z., Lear, G. (2020) Characterisation of the expression of select genes in response to key marine pollutants in the triplefin Forsterygion capito. New Zealand Journal of Marine and Freshwater Research.

Mathieu, C., Lear, G., Buckley, T., Hermans, S.M. Lee, K.C., Buckley, H.L. (2020) A systematic review of sources of variability and uncertainty in eDNA data for environmental monitoring. Frontiers in Ecology and Evolution 8: article 135.

Hermans, S.M., Taylor, M., Grelet, G., Curran-Cournane, F., Buckley, H.L., Handley, K.M., Lear, G., (2020) From pine to pasture: Land use history has long-term impacts on soil bacterial community composition and functional potential. FEMS Microbiology Ecology 96(4): fiaa041

Montenegro, D., Astudillo-Garcia, Hickey, A., Lear, G (2020) A non-invasive methods to monitor marine pollution from bacterial DNA present in fish skin mucus. Environmental Pollution. 263: 114438

Hermans, S.M., Buckley, H.L., Case, B., Lear, G., (2020) Connecting through space and time: Catchment-scale distributions of bacteria in soil, water and sediment. Environmental Microbiology 22(3): 1000-1010.

(2019)

Bains, A., Perez-Garcia, O., Lear, G., Greenwood, D., Swift, S., Middleditch, M., Kolodziej, E., Singhal. N (2019) Induction of microbial oxidative stress as a strategy to enhance the enzymatic degradation of organic micropollutants in synthetic wastewater. Environmental Science and Technology 53 (16): 9553-9563.

Hermans, S.M., Buckley, H.L. Lear, G (2019) Perspectives on the impact of sampling design and intensity on soil microbial diversity estimates. Frontiers in Microbiology 10: article 1820.

Mery-Araya, C, Lear, G., Perez-Garcia, O., Astudillo-Garcia, C., Singhal, N. (2019) Using carbon substrate as a selection pressure to enhance the potential of aerobic granular sludge microbial community for removing contaminants of emerging concern. Bioresource Technology 290: 121705.

Astudillo-Garcia, C., Hermans, S.M., Stevenson, B., Buckley, H.L., Lear, G (2019) Microbial assemblages and bioindicators as proxies for ecosystem health status: potential and limitations. Applied Microbiology and Biotechnology 103: 6407-6421.

Wu, G., Yang, J., Jiang, H., Deng, Y., Lear, G (2019) Distribution of potentially pathogenic bacteria in the groundwater of the Jianghan Plain, Central China. International Biodeterioration & Biodegradation. 143: 104711

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