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.

PhD-position in arctic plant-soil-microbe interactions at CIRC in Abisko

Photo by Ive van Krunkelsven (C)

Photo by Ive van Krunkelsven (C)

A PhD-position in Ecology (4 years) is available in Abisko at the Climate Impacts Research Centre of the Department of Ecology and Environmental Science, Umeå University, north Sweden, to study the seasonal dynamics of plant-soil-microbe interactions in arctic ecosystems. Uptake of carbon by arctic plants is strongly limited by their access to nutrients, especially nitrogen, due to competition by microbes. Climate change can alter the interactions between plants and microbes, and can therefore alter nitrogen and carbon cycles in arctic ecosystems. In the Arctic, climate change is especially pronounced during autumn, winter and spring, but their impacts on plant-soil-microbe interactions remain unclear. We are looking for a PhD-student to investigate the seasonal dynamics of interactions for nitrogen between arctic plants and microbes, and how this changes with altered winter, spring and autumn climate.

Application Deadline: 2019-03-14

If you have questions regarding the position please contact Ellen Dorrepaal.

Threshold podcast "Impermafrost" with CIRC researcher Gesche Blume-Werry

Threshold podcast "Impermafrost" with CIRC researcher Gesche Blume-Werry

Ice is often beautiful. Even dramatic. We can photograph sea ice from space. We can hike up to—and onto—land ice, like glaciers and ice sheets. But permafrost, which is frozen soil, isn't so flashy or charismatic. It operates under the cover of darkness, below ground, hidden from view. In fact, there's permafrost in the photograph above, just a few feet below the hand of Dr. Gesche Blume-Werry, but you'd probably never know it.

Tidsmaskinen Abisko berättar om klimatförändringen

Hannah Rosenzweig är forskarstudent och har tagit prover på berget Nolia i Abisko. Foto: Simon Magnusson/SR

Hannah Rosenzweig är forskarstudent och har tagit prover på berget Nolia i Abisko. Foto: Simon Magnusson/SR

På två år har Abisko varit med om värmerekord och vädervariation som normalt ses över hundra års tid. Uppe på berget Noulja är förändringen tydlig i landskapets växtlighet.

Med hjälp av en studie som påbörjades 1917 ser man nu hur den arktiska miljön har förändrats av klimatet över hundra år.

I programmet hörs Keith Larson, evolutionär ekolog vid Umeå Universitet, och Hannah Rosenzweig, forskarstudent.


For more information about the project.

Greenhouse emissions from Siberian rivers peak as permafrost thaws

Greenhouse emissions from Siberian rivers peak as permafrost thaws

Permafrost soils store large quantities of frozen carbon and play an important role in regulating Earth’s climate. In a study published in Nature Geoscience, researchers from Umeå University, Sweden, in collaboration with an international team, now show that river greenhouse gas emissions rise high in areas where Siberian permafrost is actively thawing.

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

INTERACT Transnational Access and Remote Access call now open

Interact.png

New Transnational Access Call is Now Open
INTERACT Transnational Access and Remote Access call for s/s 2019 and a/w 2019-2020

Open at 2018-08-13 00:00:00 (Europe/Brussels) 
Close at 2018-10-12 23:59:59 (Europe/Brussels) 

The call is for INTERACT Transnational Access (TA) to 43 stations and Remote Access (RA) to 18 stations. Stations offering TA or RA are located across the Arctic and northern alpine and forest areas in Europe, Russia and North-America. The sites represent a variety of glacier, mountain, tundra, boreal forest, peatland and freshwater ecosystems, providing opportunities for researchers from natural sciences to human dimension. Note: applicants are not eligible for TA to their national infrastructures, i.e. stations that are located in the same country or operated by institutions located in the same country in which the applicant is working/residing. For example, scientists working in Finland are not eligible for TA to Finnish research stations, scientists working in UK are not eligible for TA to UK Arctic Research Station in Svalbard, scientists working in Denmark are not eligible for TA to research stations in Greenland, operated by Danish institutions, etc.

Good news for fishermen: “Browning” impacts fish less than expected

Water color is getting darker in lakes across the planet. This phenomenon, known as “browning,” was anticipated to cause widespread declines in fish populations. A new study by researchers from Umeå University finds that the number of fish populations impacted by browning is smaller than previously believed.

[Read More]

Original article:
David Seekell, Pär Byström, and Jan Karlsson, Lake morphometry moderates the relationship between water color and fish biomass in small boreal lakes. Limnology and Oceanography. 2018. doi: 10.1002/lno.10931

For more information, please contact:

David Seekell, Assistant professor, Department of Ecology and Environmental Science, Umeå University, Sweden

Limnology and Oceanography Research Exchange (LOREX)

Lapporten Gerard Rocher 150630 950x400.jpg

Limnology and Oceanography Research Exchange (LOREX) is an NSF funded initiative to provide training in international research for graduate students. Graduate student research is often constrained by the resources, ideas, and culture of the home institution. International collaborations enhance graduate students’ ability to think critically and creatively, make cross-disciplinary connections, and stretch one's field of view while gaining competency in an international environment and increasing their network of colleagues.

Opportunities for research exchanges in freshwater ecology, aquatic biogeochemistry and paleolimnology are possible with CIRC at Umeå University.

[Read More]

Science communication internships in Abisko

ANS Aurora Lars Lehnert 20170209.jpg

Are you interested in learning and applying your science communications skill in the context of exciting ecological and environmental scientific research? The Climate Impacts Research Centre is offering internships based at the Abisko Scientific Research Station, 200 km north of the Arctic Circle. Our research focuses on terrestrial and aquatic ecosystems and their interface at the edge of the Arctic.

Interns work with researchers, students, and the public to communicate our fascinating and import climate research globally. If you are fluent in dynamic website and social media tools, capable with a digital camera, video and audio recording, we would like to see you in Abisko!

We are looking for one or two interns for September to November 2018.

[Read More]

Fingerprints of change: Abisko plants and phenology citizen science

Abisko Plant and Phenology iNaturalist poster 20180711.jpg

Abisko plants and phenology (fjällkalendern) aims at collecting species distributions and phenology data for the Abisko region (focused in and around Abisko National Park). This project is part of our larger efforts to identify the fingerprints of environmental change in Abisko. We have over 100 years of plant distribution and phenology data, plus weather data (1913 to present), from researchers at the Abisko Scientific Research Station. This provides a unique time machine to allow us to quantify the change to the plant communities of this region perched on the edge of the Arctic.

Visit our project page here.

Visit our citizen science page here.

New Paper: Lake morphometry moderates the relationship between water color and fish biomass in small boreal lakes

Globally, lake waters are thought to be getting darker due to increasing concentrations of dissolved organic carbon - an amalgam of thousands of uncharacterized carbon compounds that get flushed into lakes from surrounding areas. It's been predicted that this change in water color will lead to declining fish populations, but prior studies haven't considered how variations in lake depth might affect this relationship.

Seekell, D. A., P. A. Byströn, & J. Karlsson 2018. Lake morphometry moderates the relationship between water color and fish biomass in small boreal lakes. Limnology and Oceanography. Early Online. DOI: 10.1002/lno.10931

pub46_img1 1200 x 764.jpg