ecosystems

The disappearance of elephants and other large land animals could have a devastating and permanent effect on plants and animals they live with, say researchers. When they analyzed large animal, or megafauna, extinctions in the Americas since humans moved in about 15,000 years ago, they discovered long-lasting changes in the local landscape after the largest… Read more

Life is hard out on the coral reef, it can be hard to know who’s a friend and who’s an enemy. Take seaweed, for example. Normally it’s the enemy of coral, secreting toxic chemicals, blocking the sunlight, and damaging coral with its rough surfaces. But when hordes of hungry crown-of-thorns sea stars invade the reef… Read more