Figure 2
From: Model systems to elucidate minimum requirements for protected areas networks
Number of sites (10 cm × 10 cm “planning units”) required to represent all lichens on model systems of landscapes as a function of species richness. Trees were all growing within the Avalon Forest Ecoregion, Newfoundland, Canada, and include 24 balsam fir trees (Abies balsamea) growing in a single stand (black circles) and 21 growing across the wider ecoregion (open circles), along with 21 yellow birch (Betula allegheniensis) growing across the wider ecoregion (plus (+) symbols), an area of ~500 km2.
