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Roland Jansson

My main research interest is to explain patterns in biodiversity: Why are there more species in some places than others? I'm also interested in human impacts on ecosystems, such as climate change and hydropower, and ways to restore degraded ecosystems.

My research has two major themes: (1) The evolutionary consequences of climatic fluctuations in the past, and the implications of such climatic shifts for macroecological patterns, and (2) the ecology of plant communities.

Contact information

PI: Roland Jansson

Research

The Earth is subject to climatic shifts occurring on time-scales of thousands to hundreds of thousand years caused by periodical changes in Earth's orbit. Climatic shifts affect the probability of survival and divergence of gene pools, and geographical variation in the magnitude of climatic shifts may cause a range of biological phenomena, such as global patterns in diversification, range-sizes and characteristics of species. I study these issues together with Mats Dynesius. In addition, I study a range of issues related to plant communities, such as the effects of climate change, the spread of invasive species and the importance of dispersal in structuring species composition. I also study ecological effects of damming and water-level regulation, and methods to restore stream ecosystems.

Member of Faculty of 1000 Biology in the section for spatial ecology and landscape ecology. Read my evaluations of papers here.

Scientific editor for the ecology section of Encyclopedia of Life Sciences (Wiley)

PhD-students

Primery supervisor:
Lotta Ström

Assistant supervisor:
Pieter Deleu
Anna Dietrich
Johanna Engström

Teaching

I'm course co-ordinator for the advanced level course in Conservation Biology. I also teach plant and community ecology, such as the ecology of aquatic plants.

CV 22.33 Kb

Open positions:
I am currently seeking two postdoctoral candidates for a project on climate change and the evolution of biodiversity. Look here to find out more and apply: http://www8.umu.se/umu/aktuellt/arkiv/lediga_tjanster/315-301-09.html

Last Updated ( Monday, 06 April 2009 )

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Publications

Jansson R.
Extinction risks from climate change: macroecological and historical insights
F1000 Biology Reports 2009 1:44

Engström J., Nilsson C. and Jansson R.
Effects of stream restoration on dispersal of plant propagules
Journal of Applied Ecology 2009 46:397–405

Catford J.A., Jansson R. and Nilsson, C.
Reducing redundancy in invasion ecology by integrating hypotheses into a single theoretical framework
Diversity and Distributions 2009 15: 22–40

Jansson R. and Davies T. J.
Global variation in diversification rates of flowering plants: energy versus climate change
Ecology Letters 2008 11: 173–183

Helfield J M; Capon S J; Nilsson C; Jansson R; Palm D,
Restoration of rivers used for timber floating : effects on riparian plant diversity
Ecol Appl 2007 (17) 840-51

Nilsson C. Jansson R. Malmqvist B. and Naiman R. J.
Restoring riverine landscapes: The challenge of identifying priorities, reference states, and techniques
Ecology and Society 2007 12 Art. No. 16

Jansson R. Nilsson C. and Malmqvist B.
Restoring freshwater ecosystems in riverine landscapes: the roles of connectivity and recovery processes
Freshwater Biology 2007 52 589-596

Jansson R. Laudon H. Johansson E. and Augspurger C.
The importance of groundwater discharge for plant species number in riparian zones
Ecology 2007 88 131-139

Jansson R. H. Backx A. J. Boulton M. Dixon D. Dudgeon F. Hughes K. Nakamura E. Stanley and K. Tockner.
Stating mechanisms and refining criteria for ecologically successful river restoration: A comment on Palmer et al. (2005)
Journal of Applied Ecology 2005 42 218-222

R. Jansson U. Zinko D. M. Merritt and C. Nilsson
Hydrochory increases riparian plant species richness: a comparison between a free-flowing and a regulated river
Journal of Ecology 2005 93 1094-1103

Renöfält B. M. Jansson R and Nilsson C.
Spatial patterns of plant invasiveness in a riparian corridor
Landscape Ecology 2005 20 165-176

Dynesius M. Jansson R. Johansson M. E. and Nilsson C.
Intercontinental similarities in riparian-plant diversity and sensitivity to river regulation
Ecological Applications 2004 14 173-191

Jansson R.
Global patterns in endemism explained by past climatic change
Proceedings of the Royal Society, London Series B 2003 270 583-590

Jansson R. and Dynesius M.
The fate of clades in a world of recurrent climatic change: Milankovitch oscillations and evolution
Annual Review of Ecology and Systematics 2002 33 741-778

Xiong S. Nilsson C. and Johansson M.E. and Jansson R.
Responses of riparian plants to accumulation of silt and plant litter: the importance of plant traits
Journal of Vegetation Science 2001 12 481-490

Jansson R. Nilsson C. Dynesius M. and Andersson E.
Effects of river regulation on river-margin vegetation: a comparison of eight boreal rivers
Ecological Applications 2000 10 203-224

Jansson R. Nilsson C. and Renöfält B.
Fragmentation of riparian floras in rivers with multiple dams
Ecology 2000 81 899-903