Physical ecosystem engineers are organisms that physically shape the abiotic environment. By changing the availability of resources (e.g. nutrients, organic matter), or the abiotic conditions for microbially driven activity (e.g. soil texture, moisture and temperature) or habitat requirements for plants, they can affect biogeochemical processing and plant diversity. Consequently, ecosystem engineering often meets the criteria of biogeochemical “hot spots” and “hot moments” (McClain et al. 2003) as it induces temporal-spatial process heterogeneity or changes in biogeochemical reaction rates.
In this project, we will test the effects of ant activity and nest building on the release of DOC, dissolved N-species, and phosphate into the mineral soil compared to the non-affected surrounding area. The objectives are first to map the spatial distribution of ant nests and vegetation patterns on a meadow of the Hainich area (West Thuringia) and then to determine the effects of the yellow meadow ant ecology on (1) the mobilization of soluble organic matter and associated nutrients released from the ant hill and (2) on the binding forms of elements and compounds (organic vs. inorganic N species) in soil leachates of engineered and non-modified micro-sites.
The selected applicant will be guided by Prof. Dr. Michalzik, Department of Soil Science at the Friedrich-Schiller-University of Jena, and a PhD advisory committee.
The Research School
The successful applicant will be part of the International Max Planck Research School for Global Biogeochemical Cycles. Research at the school focuses on the distribution of elements essential to life and the climate among the components of the Earth system and the interaction between biosphere, atmosphere, lithosphere, land and oceans.
Besides doing research for their PhD project, PhD candidates also benefit from a three-month external research visit, specialised courses in e.g. statistics, Earth observation, modelling and analytical techniques, as well as in soft skills. The school is thus an excellent starting platform for a successful career in a field related to global biogeochemical cycles and Earth System Science.
Requirements
We welcome applications from well-motivated and highly-qualified students from all countries. Applicants hold (or are about to receive) a Master of Science, German ‘Diplom’ or equivalent degree in natural sciences. The candidate should be trained in soil science, biogeochemistry, geography or biology and should have experience in GIS-techniques, relevant ecosystem processes (e.g. element cycling), botany and animal ecology. For conducting the field campaigns a car driving license is appreciated.
Proficiency in English is required since English is the official language of the program. Handicapped persons with comparable qualifications receive preferential status.
Application Deadline : 12 August 2012
Posted on 2012-08-10 04:39PM
