/forets-morcelees-oiseaux-menaces

#forêt #écologie #biodiversité

Habitat fragmentation and its lasting impact on Earth’s ecosystems
▻http://advances.sciencemag.org/content/1/2/e1500052

This analysis revealed that nearly 20% of the world’s remaining forest is within 100 m of an edge (Fig. 1, A and B)—in close proximity to agricultural, urban, or other modified environments where impacts on forest ecosystems are most severe (14). More than 70% of the world’s forests are within 1 km of a forest edge. Thus, most forests are well within the range where human activities, altered microclimate, and nonforest species may influence and degrade forest ecosystems (15). The largest contiguous expanses of remaining forests are in the humid tropical regions of the Amazon and Congo River Basins