Applications are invited for a Post- Doctoral Research Fellow 1 in the UCD School of Biology and Environmental Science / Earth Institute. This is a temporary post. We are seeking a post-doctoral fellow for research on the phenology of perennial ryegrass pastures, with a primary focus on the timing of the start (green-up) and end (senescence) of the growing season. This postdoctoral fellow will be part of a 2 year, EPA funded project that aims to evaluate the significance of variations in the phenology of perennial ryegrass (https://www.ucd.ie/ecomodel/phenology.html). Perennial ryegrass is economically and ecologically the most important species in Ireland’s improved grasslands. These grasslands are important carbon sinks and thus the phenological response to climate can be an importa