Ellen Dorrepaal

Welcoming our new postdoctoral researcher Niki Leblans

We welcome Niki Leblans, post doc working with Ellen Dorrepaal in Abisko.

Niki Leblans Profile Picture 900x1200 72dpi.jpg

I am an ecologist and biochemist with a strong interest in northern ecosystems and their responses to climate change. I have been working on geothermally warmed ecosystems in Iceland, unraveling long-term warming effects on the ecosystem C and N cycle and on plant physiology. Now, I will be participating in the winter ecology project in Abisko. We will investigate the role of winter processes in plant and microbial carbon transformations and plant physiology and activity. We will put a special focus on responses to snow cover changes (an important factor of climate change at high latitudes). We plan to measure CO2 and CH4 emissions throughout an entire year to estimate the contribution of winter emissions to the annual carbon balance (and thus climate feedback) of tundra ecosystems. By applying an isotope-labelling technique we will further partition the respired carbon emissions into autotrophic and heterotrophic sources.

Welcoming our new postdoctoral researcher Josefine Walz

WE WELCOME JOSEFINE WALZ, POST DOC, WORKING WITH ELLEN DORREPAAL IN ABISKO

Josefine Walz Profile Picture 1200x800 72 dpi.jpg

I have a profound interest in landscape evolution and soil processes of the Earth’s cold regions. Previously, I worked on greenhouse gas production from degrading permafrost in Siberia. Most of this research took place in summer. In the current winter ecology project in Abisko, however, we will focus the role of winter processes in plant and microbial carbon transformations. We plan to measure CO2 and CH4 emissions throughout an entire year to estimate the contribution of winter emissions to the annual carbon exchange from tundra ecosystems. By applying an isotope-labelling technique we will further partition the respired carbon into autotrophic and heterotrophic sources. Additionally, ecophysiological parameters will be measured to investigate the temperature and light limitations to plant carbon uptake in winter. Overall, this project will give us a better insight into cold-season emissions and a better constrain of an often neglected climate-feedback.

Two Postdoctoral Fellowships in Arctic ecosystems ecology / plant-ecophysiology / microbial ecology

Lapporten Keith Larson 20140424 1200x800.jpg

Two Postdoctoral Fellowships (2 years each) in Arctic ecosystems ecology / plant-ecophysiology / microbial ecology are available in Abisko at the Climate Impacts Research Centre of the Department of Ecology and Environmental Science, Umeå University, north Sweden, to study the off-seasonal dynamics of plant and soil microbial processes in arctic ecosystems. Climate change in the Arctic is especially pronounced during autumn, winter and spring, including increases in temperature, changes in snow fall/cover and rain-on-snow events. Such off-seasonal changes in climate can affect the carbon balance of arctic ecosystems and the underlying plant and soil microbial processes but the extent remains unclear. We are looking for two postdoctoral fellows to to investigate how changes in the timing, frequency and extent of winter freezing conditions, as well as the timing of spring and autumn, affects the (off-)seasonal dynamics of plant and microbial processes in arctic ecosystems.

Deadline: 28 September 2018

[Read More]

For more information, contact Dr Ellen Dorrepaal

Klimatexperimentet film released (in Swedish)

Climate Impacts Research Centre scientists Ellen Dorrepaal and Keith Larson feature in a new film project about climate by Swedish artists Bigert & Bergström. The following description is in Swedish...

aasdasd.jpg

En film av och med konstnärsduon Bigert & Bergström. En konstnärsfilm om de brännande aktuella klimatförändringarna, mot en bakgrund av duons konstinstallationer där väder och vind på ett tidigt stadium fick ersätta färg och lera. Klimatexperimentet utspelas under det intensiva året 2017 där vi får följa Bigert & Bergströms olika projekt och aktiviteter i tolv månadskapitel. Forskningsresor, stora utställningsprojekt och invigningar av offentliga konstverk korsklipps med intervjuer där B&B möter journalister, miljöhistoriker och klimatforskare.

Watch on SVTPlay.se

 

Nature Microbiology (Blog): Mega-meta-analysis of many microbes...

Mega-meta-analysis of many microbes...

Searching for global patterns of soil bacteria

Kelly S. Ramirez, Christopher G. Knight, Mattias de Hollander, Francis Q. Brearley, Bede Constantinides, Anne Cotton, Si Creer, Thomas W. Crowther, John Davison, Manuel Delgado-Baquerizo, Ellen Dorrepaal, David R. Elliott, Graeme Fox, Robert I. Griffiths, Chris Hale, Kyle Hartman, Ashley Houlden, David L. Jones, Eveline J. Krab, Fernando T. Maestre, Krista L. McGuire, Sylvain Monteux, Caroline H. Orr, Wim H. van der Putten, Ian S. Roberts, David A. Robinson, Jennifer D. Rocca, Jennifer Rowntree, Klaus Schlaeppi, Matthew Shepherd, Brajesh K. Singh, Angela L. Straathof, Jennifer M. Bhatnagar, Cécile Thion, Marcel G. A. van der Heijden & Franciska T. de Vries

41564_2017_62_Fig1_HTML.jpg

The paper in Nature Microbiology is here: http://go.nature.com/2AhASzB

"It is well known that we live in a microbial world – with microbes all over our bodies, in our homes, in the air we breath, and in the ground we walk on. In the soil, these bacteria, fungi and other eukaryotes help plants grow, cycle water and important nutrients, and keep our ecosystems functioning. Researchers all over the world are using high-throughput sequencing to study these important microbes, but keeping the corresponding data catalogued and organized is a challenge - especially if we are to use it to respond to questions of global change. In our recent study, we tackle this challenge by bringing together disparate soil bacterial datasets from over 1900 soil samples collected from 21 countries spread across the world."

[Read More]

Journal of Ecology (The Blog): Winter is coming but is getting warmer!

Winter is coming but is getting warmer!

Eva.jpg

This new video podcast from Eveline Krab is dedicated to winter ecology and shows that climate warming is also happening in winter! In this video, Eveline highlights the main results of her paper recently accepted for publication in Journal of Ecology titled “Winter warming effects on tundra shrub performance are species-specific and dependent on spring conditions“.

Eveline’s video can also be found on the Journal of Ecology YouTube channel (English subtitles available).

[Read More]

Arctic seminar 21 October 2017 in Honour of H.M. The King

 

When HM King Carl XVI Gustaf celebrated his 70th birthday in 2016, Umeå University honoured him with a gift – a scientific seminar. The theme of the seminar is the Arctic – a highly topical issue – not least because of the climate changes that pose a substantial threat to the world we live in.

[Read More]

Three lectures (total time 1:09:12)


Setting Arctic Environmental Change in a Global Context


John Anderson Profile 1200x800 photo by Pierre Oesterle.jpg

John Anderson

Setting Arctic environmental change in a global context

Skip forward to -58:45

Ellen Dorrepaal

Cryoecology: how arctic ecosystems matter for our changing climate

Skip forward to -29:45

Jonatan Klaminder Profile 1200x800 photo by Pierre Oesterle.jpg

Jonatan Klaminder

Worming of the Arctic

Skip forward to -16:30


Sweden – a peephole into climate changes

Sweden – a peephole into climate changes

The Earth is getting warmer, we know that. In Sweden, there are unique opportunities for researchers to examine how this fact affects the climate in Sweden and in the rest of the world. Sweden is like a peephole into the future, the water temperature rises, the glaciers are melting, the permafrost thaws.