Population ecology is the study of how populations — of plants, animals, and other organisms — change over time and space and interact with their environment. Populations are groups of ...

Genetic variation describes naturally occurring genetic differences among individuals of the same species. This variation permits flexibility and survival of a population in the face of changing ...

According to this idea, the changes leading to a new species don't usually occur in the mainstream population of an organism, where changes wouldn't endure because of so much interbreeding among ...

"Our research provides an essential missing piece in understanding the broader effects of warming on natural populations," said Rudolf, professor of biosciences. "Even when individual organisms seem ...

Make a model of a food web. Explain how changes in the population of one organism can affect the entire food web. Ask students to list several organisms found in the region. These should include ...

A fox is a predator, and a rabbit is its prey An owl is a predator, and a mouse is its prey An animal is often both a predator and prey The population or number of each organism in a food chain ...

This remarkable organism has created a diverse ecosystem ... wolves and cougars has led to an increase in these herbivore ...

Researchers at Rice University have uncovered a critical link between rising temperatures and declines in a species' population, shedding new light on how global warming threatens natural ecosystems.