|It ain't easy being green|
So are fungi responsible for the extraordinary diversity of tropical forests? Well, using evidence from existing experiments might be misleading for a couple reasons. First, there have been way more studies targeting fungi than any other enemy type – other enemy types might seem more important if we looked harder at them too. Second, existing experiments that determine the cause of distance-dependent mortality have only targeted at single enemy type for the plant species – that sort of study can’t in principle tell us whether one enemy is more important than another for that plant species. To determine the relative importance of these natural enemy types, what we really need are studies that simultaneously manipulate multiple enemy types in the field.