The University of Sydney - Biogeochemistry Group

Dijkstra Laboratory 

Dijkstra Lab

GROUP LEADER

Dr. Feike Dijkstra
Associate Professor

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 a Ph.D. candidate in agroecology at Ferdowsi University of Mashhad, Iran, and I am a visiting scholar at the University of Sydney. 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-induced changes in root traits, root C exudation (using 13C isotopes) and mycorrhizal infection of four different wheat genotypes relate to yield. I also investigate the effects of N and P fertilization on soil microbial biomass and respiration, microbial nitrogen mineralization and microbial carbon use efficiency (CUE) for two genotypes of wheat using 15N pool dilution and 18O-water labeling techniques, respectively.

Milad Bagheri

I am a Ph.D. candidate in crop ecology at Ferdowsi University of Mashhad, Iran, and I am a visiting scholar at the University of Sydney. I am interested in the crop rotation and ecological factors on agro-biodiversity, resource use efficiency and carbon and nitrogen cycle. At the University of Sydney I am examining how nitrogen and phosphorus fertilization-induced changes in root traits, root C exudation (using 13C isotopes) and mycorrhizal infection of four different wheat genotypes relate to yield. I also investigate the effects of N and P fertilization on soil microbial biomass and respiration, microbial nitrogen mineralization and microbial carbon use efficiency (CUE) for two genotypes of wheat using 15N pool dilution and 18O-water labeling techniques, respectively.

Jiayu Lu

I am a Ph.D student in the Institute of Applied Ecology, Chinese Academy of Sciences. Now I am a visiting student in the Dijkstra laboratory at the University of Sydney. I am interested in plant-soil interactions, including rhizosphere priming on soil C and N dynamics, rhizosphere activation on nutrient elements, and other rhizosphere properties. During my visit, I will investigate the carbon costs for plant nutrient uptake, which is termed as the total belowground carbon use efficiency (TBCUE). I will test how TBCUE varies between a legume and grass under different nutrient availabilities.

VISITING SCHOLAR

Jinfeng Yang

I have a Ph.D. in plant nutrition from Shenyang Agricultural University, China, and I am a visiting scholar at the University of Sydney. My current research focuses on the change of soil carbon and nitrogen in long-term fertilizer experiments. At the University of Sydney I am examining the effect of grazing on carbon and nitrogen cycling and recycling in a grassland of Australia.

PAST LAB MEMBERS AND VISITORS

Paola Corneo, postdoc 2013-2018.

Shiva Bakhshandeh, PhD student 2015-2018.

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

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

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

Pierre Mariotte, postdoc 2014-2016. Now postdoc at École Polytechnique Fédérale de Lausanne, Switzerland (website).

Hero Tahaei, research assistant 2012-2016. Now research assistant with A/Prof Brent Kaiser, The University of Sydney.

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 from Shapotou Desert Research and Experiment Station, Chinese Academy of Sciences, Lanzhou, China, 2013-2014.

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