I am a landscape ecologist using models to further our understanding of ecosystem dynamics. I have worked on the causes change in European and Canadian forests, including climate change, insect outbreaks and human disturbances. Tools that I apply to understand forests include Species Distribution Models, demographic models, forest landscape models, and metapopulation/ metacommunity models. A related interest is how species interactions can affect dynamics, and I have studied how food webs could explain Pleistocene mammal extinctions, and developed new mechanisms for how hyperparasitoids could alter parasitoid densities and thus contribute to large-scale insect outbreaks.
Currently at SLU, I am working on wood-living fungi, and developing a metacommunity model where species influence the colonization and extinction of other species in the community (through competition, facilitation).
H Nenzén, D Price, D Cyr, Y Boulanger, A Taylor, E Campbell. 2020. Projected climate change effects on Alberta’s boreal forests imply future challenges for oil sands reclamation. Restoration Ecology, 28: 39-50
Nenzén, HK, V Martel, D Gravel. Can hyperparasitoids cause large‐scale outbreaks of insect herbivores? 2018. Oikos, 127: 1344–1354
Nenzén, HK, P Peres-Neto, D Gravel. 2017. More than Moran: Coupling statistical and simulation models to understand how dispersal and climate variation drive insect outbreak dynamics. Special issue of Canadian Journal of Forest Research,48: 255-264
Nenzén, HK, MB Araújo. 2011. Choice of threshold alters projections of species range shifts under climate change. Ecological Modelling, 222: 3346-3354.