North America's plant life is becoming increasingly uniform throughout the continent.
According to recent counts, scientists have described over 1.7 million species of animals, plants and algae.
A desolate basin on the southern edge of the Sahara Desert supplies 45 million tons of dust that naturally fertilizes the Amazon rainforest each year.
Accumulating research is gradually fitting together answers to the question of why, for millions of years, the tropics have housed so many more species than have temperate and polar regions.
How three species of conifers become distributed throughout a forest as it ages is mediated by competition.
Lodgepole pine forests may never be the same, ecologically, following a mountain pine beetle epidemic.
The transition between a stand affected by wildfire or mountain pine beetles and an undisturbed forest is seldom abrupt.
The oceanís interlinked food web of photosynthesizers, grazers, predators and detritus recyclers is being reconfigured.