Fig. 3From: A field experimental study on the impact of Acer platanoides, an urban tree invader, on forest ecosystem processes in North AmericaMineralization rate (a), nitrification rate (b), and relative nitrification (c) in plots under three plot-level treatments, i.e., control plots (circles), litter-removed plots (triangles), and trenched plots (squares). The graph shows means ± 1 SDBack to article page