Demography and life-history evolution of a foundation species in variable and changing marine environments
Early Lunch Talk by Per Åberg (Professor of Marine Ecology, University of Gothenburg, Sweden).
The brown seaweed Ascophyllum nodosum is a foundation species living on rocky shores in the intertidal zone in the northern Atlantic. It is long lived and has an inducible chemical defence against grazing. I have in several earlier projects gathered and analysed demographic data using size based Matrix Population Models (MPM). Size is a continuous variable and thus it can be problematic to divide the population into specific size classes. A development of MPMs is Integral Projection Models that can handle continuous phenotypic characters such as size in a better way. During my sabbatical here at CEES I will develop new IPMs for Ascophyllum using data from my earlier projects. Data comes from Sweden, Isle of Man, France and Portugal. Both deterministic and stochastic models will be developed and analysed and I will further link scenarios of chemical defence and climate change to the models. In this seminar I will show you some preliminary results from the IPMs and show how they will be further developed.
Note that the talk will start before lunch at 11:15.