Title: "The ecology of collective behaviour"
Speaker: Professor Deborah Gordon - Department of Biology, Stanford University (lab page)
Venue: G04 Anatomy Gavin de Beer LT (map)
Host: Dr Seirian Sumner (email)
Abstract: Like many biological systems, an ant colony operates without central control. Each ant responds to its interactions with other ants nearby. In the aggregate, these stochastic, dynamical networks of interaction regulate colony behaviour.
Ants are extremely diverse, and species differences in collective behaviour reflect relations with diverse environments. A long-term study of desert seed-eating ants shows how colonies regulate foraging activity according to food availability and humidity, and how natural selection is shaping collective behaviour in current drought conditions. In the tropical arboreal turtle ant, trail networks respond to the distribution and stability of resources.
The algorithms that generate collective behaviour have evolved feedback regimes that fit the dynamics of particular environments. Examples from ants provide a starting point for examining more generally the fit between the particular pattern of interaction that regulates collective behaviour, and the environment in which it functions.
Starts: May 22, 2018 1:00:00 PM
Title: "Sex in pathogens: When, where & why?"
Speaker: Professor Anna-Liisa Laine - Department of Biosciences, University of Helsinki (research profile)
Host: Dr Max Reuter (email)
Venue: AV Hill LT, Medical Sciences (map)
Starts: May 23, 2018 12:00:00 PM
Title: "Predicting dynamics of African ecosystems under human pressures"
Speaker: Dr Georgina Adams, Research Associate
Venue: G01 Lankester LT Medawar Building (map)
Abstract: Predicting future impacts on ecosystems is necessary for informing and assessing policy decisions. This is particularly true in much of Africa, a continent with a fast-growing human population that will drive rapid environmental changes in the coming decades. However, ecosystem change can be challenging to forecast because of a lack of available ecological data, and because individual processes will respond differently to different pressures. There are three main human pressures that are likely to alter ecosystem structure and function in Africa: climate change, land use change, and bushmeat hunting. In this talk I will discuss how we are using the Madingley general ecosystem model, an individual-based mechanistic model, to predict ecosystem dynamics under different scenarios of these pressures.
Starts: Jun 4, 2018 1:00:00 PM
Starts: Jun 6, 2018 12:00:00 PM
Title: Reshuffling the ecological deck: novel interactions and the dynamics of species’ ranges
Speaker: Professor Jake Alexander - Department of Ecology and Evolution, University of Lausanne (research profile)
Venue: G01 Medawar Building Lankester LT (map)
Host: Richard Pearson (email)
Abstract: Species' distributions are being reshuffled across the globe at an unprecedented rate, occurring through the spread of non-native species and range shifts of native species responding to climate and land use changes. This redistribution of species’ ranges is giving rise to novel assemblages, in which species interact that were not previously in contact. Biological invasions show us that the impacts of these novel interactions can sometimes be dramatic. However, the impacts of novel interactions following climate change are poorly understood. In this presentation I will draw on research conducted in our lab in alpine plant communities and with non-native plants to ask how novel interactions could affect the responses of species, communities and ecosystems to climate change. I also ask how evolution could affect the outcome of novel interactions. This work suggests that novel interactions could play a central role in mediating the ecological impacts of climate change, and I highlight several key challenges and opportunities to better understand and predict these impacts.
Starts: Jun 12, 2018 1:00:00 PM