Tag-arkiv: University of Helsinki

Postdoctoral researcher in stat­istical eco­logy

The University of Helsinki, founded in 1640, is one of the world’s leading universities for multidisciplinary research. The University of Helsinki has an international academic community of 40,000 students and staff members, and it offers comprehensive services to its employees, including occupational health care and health insurance, sports facilities, and opportunities for professional development. The International Staff Services (https://www.helsinki.fi/en/university/working-at-the-university) office assists employees from abroad with their transition to work and life in Finland. The Organismal and Evolutionary Biology Research Programme is situated at the Viikki science park and belongs to the Faculty of Biological and Environmental Sciences of University of Helsinki.

The Organismal and Evolutionary Biology Research Programme (OEB) invites applications for a

POSTDOCTORAL RESEARCHER

in statistical ecology for a fixed term of two years. There will be a trial period of six months in the
beginning.

The post doc position is part of the Research Centre for Ecological Change and is funded by the Jane and Aatos Erkko Foundation. PIs of the Centre are prof. Anna-Liisa Laine, prof. Otso Ovaskainen, prof. Tomas Roslin, assist. prof. Jarno Vanhatalo and assist. prof. Marjo Saastamoinen. The starting date is 1 January, 2020, but a later starting date can be negotiated.

The overarching aim of the Centre is to generate a coordinated analysis of long-term ecological data to understand impacts of global change. To unravel how populations and interactions between species in nature are responding to ongoing environmental change, the project takes advantage of the unique long-term datasets collected in Finland. The centre also develops state-of-the-art methodology for analysing long-term spatially structured data sets within a joint species distribution modeling framework. For more information please visit our website Research Centre for Ecological Change (https://www.helsinki.fi/en/researchgroups/research-centre-for-ecological…).

The post doc takes part in the development of statistical methods for analyzing long-term ecological data and in statistical analyzes within the Research Centre for Ecological Change. For recent methodological publications, see the reference list at the end.

The methodological work focuses on development of Hierarchical Modelling of Species Communities (HMSC) and hierarchical multivariate Gaussian processes. HMSC is a joint species distribution modelling framework that can be used for the statistical analysis of data on species occurrence, environmental covariates, functional traits and phylogenetic relationships. HMSC can be applied to hierarchical, spatial and temporal study designs, and it applies to many kinds of response data (presence/absence, counts, etc.). Gaussian processes are a flexible and versatile modeling approach, and are rapidly spreading through statistical ecology as tools for species distribution and population dynamics modeling. Gaussian processes are used to model spatial and spatiotemporal heterogeneity in data and describe species responses to their environment in a nonparametric manner.

The successful applicant should have doctoral degree in statistic, machine learning, applied mathematics or other relevant field and will have experience in the development and application of Bayesian methods for computationally challenging problems. A successful candidate will also have experience in scientific computing. Prior experience in ecology is not necessary, but is counted as an advantage. The exact direction to which the post doc will develop HMSC and Gaussian process models can be agreed upon based on the experience and interests of the candidate.

The salary of the successful candidate will be based on level 5 – 6 of the demands level chart for teaching and research personnel in the salary system of Finnish universities. In addition, the appointee will be paid a salary component based on personal performance. The starting salary will be ca. 3300 – 3800 euros/month, depending on the appointee’s qualifications and experience.

Applications should include the following documents as a single pdf file: motivational letter (max 1 page), CV (max 2 pages), and publication list. Please also include contact information of two persons willing to provide a reference letter by separate request.

Please submit your application using the University of Helsinki Recruitment System via the Apply for the position link. Applicants who are employees of the University of Helsinki are requested to leave their application via the SAP HR portal. The deadline for submitting the application is 1 December 2019.

For more information, contact assistant prof. Jarno Vanhatalo (jarno.vanhatalo(at)helsinki.fi).

In case you need technical support with the recruitment system, please contact recruitment(at)helsinki.fi.

References

Ovaskainen, O., Tikhonov, G., Norberg, A., Blanchet, F. G., Duan, L., Dunson, D., Roslin, T. and Abrego, N. (2017a). How to make more out of community data? A conceptual framework and its implementation as models and software. Ecology Letters 20, 561-576

Ovaskainen, O., Tikhonov, G., Dunson, D., Grøtan, V., Engen, S., Sæther, B.-E. and Abrego, N. (2017b). How are species interactions structured in species rich communities? A new method for analysing time-series data. Proceedings of the Royal Society B: Biological Sciences 284, 20170768.

Vanhatalo, J., Hartmann, M and Veneranta, L (2019). Additive multivariate Gaussian processes for joint species distribution modeling with heterogeneous data. Bayesian Analysis, doi:10.1214/19-BA1158

Hartmann, M., Hosack, G. R., Hillary, R. M. and Vanhatalo, J. (2017). Gaussian processs framework for temporal dependence and discrepancy functions in Ricker-type population growth models. Annals of Applied Statistics, 11(3):1375-1402.

Itter, I., Vanhatalo, J. and Finley, J. (2019). EcoMem: An R package for quantifying ecological memory. Environmental Modelling & Software, 119: 305-308.

Due date

01.12.2019 23:59 EET

Read the job description at the university homepage

Apply for the position

Post expires on Sunday December 1st, 2019

Postdoc­toral re­searcher in evol­u­tion­ary se­quence analysis

The University of Helsinki is a leading Nordic university with a preeminent role in life science research. Within the university, the Institute of Biotechnology (BI) is a part of the Helsinki Institute of Life Science (HiLIFE), dedicated to successful development of biotechnology and integrative biology and the application of this knowledge for the benefit of society. HiLIFE coordinates research infrastructures, provides research-based interdisciplinary training, and supports researchers within its units and partner faculties.

The group of Ari Löytynoja is inviting applications for a

Postdoctoral researcher in evolutionary sequence analysis

for 3 years fixed term. The full-time position will start in November 2019, or later by agreement.

Template switching is a poorly known mutational mechanism that copies short stretches of sequence from the opposite strand and causes clusters of differences between homologous sequences. The mechanism has previously been studied in microbes and we recently showed (https://genome.cshlp.org/content/27/6/1039) that mutation patterns consistent with it are polymorphic also in humans. The role and significance of template switching in evolution of genes and organisms is not known.

We are now looking for a dedicated and enthusiastic post-doctoral fellow to join in a project studying this mechanism in more detail. The applicant is required to hold PhD in evolutionary biology, bioinformatics, computer science, or a related field, as well as strong written and oral communication skills. The working language of the lab is English; knowledge of the Finnish language is not necessary. Experience in computer programming and Linux systems is required, prior experience in evolutionary sequence analysis is an advantage. The salary is based on level 5 of the job requirement scheme for teaching and research personnel in the salary system of Finnish universities. In addition, the appointee will be paid a salary component based on personal work performance.

To apply, please submit your application using the University of Helsinki electronic recruitment system by clicking on Apply for job. Internal applicants must submit their applications through the SAP HR portal. Upload a single pdf-file containing a one-page letter with a personal statement outlining your relevant work experience and motivation to work on this particular project; your CV and bibliography; and contact information for 2-3 references. Review of applications will begin immediately and will continue until the position is filled. For informal inquiries, contact ari.loytynoja(at)helsinki.fi

Read the job description at the university homepage

Apply for the position

Due date

15.11.2019 23:59 EET

Post expires on Friday November 15th, 2019