The University of Sydney - Biogeochemistry Group

Dijkstra Laboratory 

Dijkstra Lab

Feike Dijkstra

I am a biogeochemist with interest in all aspects of plant-microbial interactions affecting carbon, nutrient, and water cycling in managed and unmanaged systems.


Kazi Mehnaz

I am interested in understanding the role of available phosphorus (P) on nitrogen (N) transformations and its loss from soil. I will look at the effect of P addition on gross N mineralization and nitrification and loss of N as nitrous oxide (N2O) from microbial nitrification and denitrification. A variety of soil types with different physicochemical properties will be analysed to find out any interaction of soil properties with available P in N mineralization and N2O emission.

Mohammad Rahmat Ullah

My research is mainly focused on understanding the effects of drought and soil organic amendments on carbon and nutrient mineralization in a grassland of Australia. Moreover, I am interested in examining the relationships between the microbial carbon use efficiency and enzymatic activity that affect soil organic matter decomposition during drying-rewetting cycles.

Bahareh Bicharanloo

I am interested in the effects of management and climate change on soil microbial diversity and their role on resource use efficiency and carbon storage in plant and soil. At the University of Sydney I am examining how nitrogen and phosphorus fertilization affect root C exudation, mycorrhizal infection, microbial carbon use efficiency, and nitrogen mineralization. I also investigate the effects of clipping, N and P fertilization on belowground carbon allocation and nutrient uptake in a grassland.

Junmin Pei

I am a Ph.D. candidate in soil ecology at Fudan University, China, and I am a visiting student in Feike's lab at the University of Sydney. I am interested in plant-soil interactions affecting soil carbon dynamics and its feedback to climate. During my visit, I will study the effects of biochar on carbon use efficiency and its temperature sensitivity.



Xiaoguang Wang

I am a visiting scholar in Feike’s lab at the University of Sydney. I got my Ph.D. from the Institute of Applied Ecology, Chinese Academy of Sciences. Now I am working in Dalian Minzu University in Liaoning Province of China. My research field is focused on plant and soil feedbacks in grasslands, and ecological stoichiometry. During my visit period, I will investigate the responses of plant N recycling and plant competition to N addition and drought stress.

Chunlian Qiao

I am a lecturer from Xinyang Normal University, China. I got my Ph.D. in Plant Ecology from the Institute of Botany, Chinese Academy of Sciences. I am very interested in nutrient cycles in natural and artificial ecosystems. As a visiting scholar at the University of Sydney, I am conducting a growth chamber experiment to investigate the effects of drought on the carbon costs for nutrient uptake and if interspecific competition for water will affect the C cost for plant N uptake.

Milad Bagheri

I am interested in the crop rotation and ecological factors on agro-biodiversity, resource use efficiency and carbon and nitrogen cycle. I am managing the Biogeochemistry laboratory, including managing the rainout shelter and CliFer experiment, running the TOC analyser, Flow Injection Analyzer and Gas Chromatograph, and overseeing other students and visitors engaged in analytical work.


Jinfeng Yang, visiting scientist 2018-2019. Shenyang Agricultural University, Shenyang, China (website)

Jiayu Lu, visiting PhD student 2018-2019. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China (website)

Paola Corneo, postdoc 2013-2018. Now postdoc at University of Trento, Italy (website).

Shiva Bakhshandeh, PhD student 2015-2018 (website).

Shamim Mia, PhD student 2015-2018. Now A/Prof at Patuakhali Science and Technology University, Bangladesh (website).

Liming Yin, visiting PhD student 2017. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China (website).

Alberto Canarini, PhD student 2013-2016. Now postdoc at University of Vienna, Austria (website).

Pierre Mariotte, postdoc 2014-2016. Now Scientific Collaborator, Agroscope, Switzerland (website).

Hero Tahaei, research assistant 2012-2016. Now teaching assistant at The University of Sydney (website).

Mathilde Cassani, visiting MS student 2015. École Polytechnique Fédérale de Lausanne, Switzerland.

Maggie Norton, research assistant 2015. Now at Iowa State University, USA.

Mingzhu He, visiting scientist 2013-2014. Shapotou Desert Research and Experiment Station, Chinese Academy of Sciences, Lanzhou, China (website).

Yolima Carrillo, postdoc 2011-2012. Now senior lecturer at Western Sydney University (website).