Caroline Greiser


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Arbetar vid Institutionen för ekologi miljö och botanik
Telefon 08-16 37 57
Besöksadress Svante Arrhenius väg 20 A
Rum N405
Postadress Institutionen för ekologi miljö och botanik 106 91 Stockholm

Om mig

mobil: +46 764152485



Climate driven range shifts of northern and southern species

PhD - project (2015-2019)

In this study we explore the microclimatic landscape of the Boreal forest in search of microrefugia and stepping stone habitats.

We look particularily at forest species in the transitional region called Limes Norrlandicus, where many northern and southern plants have their distributional limit.


We work on the following questions:



1) Microclimate model

We make high-resolution microclimate maps over the study area that allow the identification of locally colder or warmer microclimates in the landscape. With this analysis we also want to find out the relative effects of terrain and vegetation on local climate, in other words, we want to know, what site features create a certain microclimate and if they can be influenced in future (e.g. forest age/structure via forest management).


Greiser et. al (2018) Monthly microclimate models in a managed boreal forest landscape, Agricultural and Forest Meteorology, 250–251: 147-158


2) Northern species – Microrefugia

Further on we will identify localities with refuge populations of northern species and compare the microclimate at these sites with the regional climate to assess if these species at their range limit stick to certain (colder) microclimates or if they rather occur at sites with little competition.


3) Southern species – Stepping stones

In this subproject we try to identify possible habitat quality constrains for warm-adapted southern species to establish in stepping stone habitats, for example due to time lags in soil development. Our model species is Lathyrus vernus, for which we do both a species distribution model and transplantation experiments to find out, how relevant a warm microclimate is (vs. soil, light) for the performance at its range limit.


4) Conservation and Management

 Finally we will overlay the current different reserve networks with our model of refugia and stepping stones. Based on this evaluation, the results from the previous components and international literature we will also deliver a tool-box of possible actions of protection and forest management that should be considered by companies and authorities.

(Foto: Lina Widenfalk)

Involved people

Stockholm University

Kristoffer Hylander (main supervisor)

Johan Ehrlén

Eric Meineri

Sonia Merinero


Helsinki University

Miska Luoto


The project is partly financed by FORMAS.

I am also member of the Bolin Centre for Climate Research.

The Bolin Centre finances a project on microclimate and butterfly overwintering strategies, where I collaborate with Philipp Lehmann and Carl Gotthard from the Department of Zoology.

Senast uppdaterad: 23 maj 2018

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