In the most recent issue of Ecology Letters, Stephenson and van Mantgem show that birth and death rates of trees vary in parallel with global patterns of forest productivity. In less productive forests, such as coniferous forests growing at high latitudes, a century or more can pass before half of all trees die and are replaced with new growth.
In contrast, in the world's most productive forests – tropical forests growing on fertile soils – half of all trees die and are replaced by new growth in only thirty years. The faster turnover of trees means that the world's most productive forests may also be those likely to respond most rapidly – positively or negatively – to environmental changes.
Ecology Letters