Pedro Guilherme Nicolau

Disputas - Pedro Guilherme Nicolau

Master of science Pedro Guilherme Nicolau will on june 3rd at 12.15 publically defend his PhD degree in science.

Title of the PhD thesis:

"Boreal rodents fluctuating in space and time: Tying the observation process to the modeling of seasonal population dynamics"


Arctic ecosystems are known for their extremes - in terms of their climate, habitats, and the adaptations that fauna and flora have had to develop to thrive. Small rodents are some of the most important elements of arctic food chains, where they are important prey to iconic arctic predators, help shape the vegetation communities, among other critical ecological roles. Therefore, studying population processes of small rodents and their interactions with the environment can help predict future states of arctic ecosystems. The population cycles of arctic small rodents are characterized by large amplitudes, meaning they fluctuate in numbers through the years across the regions. This work improved the available statistical methods to accurately monitor small rodent populations and to better study the factors affecting their population cycles in both time and space.

The thesis is published and available in Munin


  • Førsteamanuesis Sigrunn Holbek Sørbye, IMS, UiT (main supervisor)
  • Professor Nigel Gilles Yoccoz, AMB, UiT (Co supervisor)

Evaluation Committee

  • Dr. Sarah Cubaynes, center d'Ecologie Fonctionnelle et Evolutive, Montpellier, France (1. opponent)
  • Dr. Aline Magdalena Lee, Centre for Biodiversity Dynamics, NTNU, Norway (2. opponent)
  • Professor Martin Rypdal, IMS, UiT, Norway (internal member and leader of the evaluation committee)

Leader of public defense

  • Cordian Riener - prodekan for forskning

Links to the trial lecture and defense will be possible to open when the live stream begins. If you haven`t clicked the link to the folder before it begins, refresh the web browser for them to become visible. If you have clicked the link to the trial lecture or defense before it has started, it will open automatically when the stream begins. 

Link to folder which contains trial lecture and defense

The trial lecture starts at 10.15 june 3rd 2022

Trial lecture

The defense starts 12.15 june 3rd 2022


Når: 03.06.22 kl 12.15–16.00
Hvor: Teknobygget auditorium 1.022
Sted: Digitalt, Tromsø
Målgruppe: Studenter, Gjester / eksterne, Inviterte
Kontakt: Eirik Derås Verlo
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