Profiles

Marianne Stoessel

Marianne Stoessel

Doktorand

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Works at Department of Physical Geography
Telephone 08-16 48 87
Email marianne.stoessel@natgeo.su.se
Visiting address Svante Arrhenius väg 8
Room V412
Postal address Inst för naturgeografi 106 91 Stockholm

About me

I am PhD student in the Biogeography and Geomatics unit, and I am studying the effects of land-use and global warming on northern grasslands, under the supervision of Regina Lindborg.

I am a passionate ecologist and I like to study nature through different perspectives, if possible different disciplines.

Originally, I studied behavioural ecology and ecophysiology. I have been introduced to the world of bio-logging in Strasbourg (2012, with Yan Ropert-Coudert).

I then developed other skills in animal monitoring such as camera trapping surveys, bird ringing and animal tracking through different projects, jobs and traineeships.

Then I did the Master programme in landscape ecology at Stockholm University (2016). There I have been studying community ecology in winter (with Bodil Elmhagen and the Arctic fox research project).

I also worked with Helle Skånes as a research assistant, working on mapping processes and biotope classification in urban land (2017).

Publications

A selection from Stockholm University publication database
  • 2018. Marianne Stoessel (et al.). Ecography

    Global warming is predicted to change ecosystem functioning and structure in Arctic ecosystems by strengthening top‐down species interactions, i.e. predation pressure on small herbivores and interference between predators. Yet, previous research is biased towards the summer season. Due to greater abiotic constraints, Arctic ecosystem characteristics might be more pronounced in winter. Here we test the hypothesis that top‐down species interactions prevail over bottom‐up effects in Scandinavian mountain tundra (Northern Sweden) where effects of climate warming have been observed and top‐down interactions are expected to strengthen. But we test this ‘a priori’ hypothesis in winter and throughout the 3–4 yr rodent cycle, which imposes additional pulsed resource constraints. We used snowtracking data recorded in 12 winters (2004–2015) to analyse the spatial patterns of a tundra predator guild (arctic fox Vulpes lagopus, red fox Vulpes vulpes, wolverine Gulo gulo) and small prey (ptarmigan, Lagopus spp). The a priori top‐down hypothesis was then tested through structural equation modelling, for each phase of the rodent cycle. There was weak support for this hypothesis, with top‐down effects only discerned on arctic fox (weakly, by wolverine) and ptarmigan (by arctic fox) at intermediate and high rodent availability respectively. Overall, bottom‐up constraints appeared more influential on the winter community structure. Cold specialist predators (arctic fox and wolverine) showed variable landscape associations, while the boreal predator (red fox) appeared strongly dependent on productive habitats and ptarmigan abundance. Thus, we suggest that the unpredictability of food resources determines the winter ecology of the cold specialist predators, while the boreal predator relies on resource‐rich habitats. The constraints imposed by winters and temporary resource lows should therefore counteract productivity‐driven ecosystem change and have a stabilising effect on community structure. Hence, the interplay between summer and winter conditions should determine the rate of Arctic ecosystem change in the context of global warming.

Show all publications by Marianne Stoessel at Stockholm University

Last updated: November 8, 2018

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