Emergence of nutrient-cycling feedbacks related to plant size and invasion success in a wetland community-ecosystem model.

•We describe a model that integrates four levels of organization in wetland vegetation.•Feedbacks emerge to amplify internal nutrient cycling over a range of inflows.•We investigate plant invasion success based on plant size and nutrient inflows.•Larger size confers an advantage for invaders at higher nutrient inflows.•Larger invader size augments nutrient-cycling feedbacks and a massive litter layer.