University of Exeter. Extinction can spread from predator to predator. Retrieved November 12, from www. The extinctions date back more than million years with the As a result of this research, ScienceDaily shares links with sites in the TrendMD network and earns revenue from third-party advertisers, where indicated. Print Email Share. She is a contributing writer in science for Smithsonian.
The loss of wolves in the American West set off a cascade of changes to the region's food web. The scientists conclude: We propose that many of the ecological surprises that have confronted society over the past centuries—pandemics, population collapses of species we value and eruptions of those we do not, major shifts in ecosystem states, and losses of diverse ecosystem services—were caused or facilitated by altered top-down forcing regimes associated with the loss of native apex consumers or the introduction of exotics.
Post a Comment. They include:. A species may also become extinct through speciation. The fossil record shows that many species have become extinct since life on Earth began. Extinction is still happening and often, it is due to human activities.
Humans compete with other living organisms for space, food and water - humans are very successful predators. Publication types Research Support, U. Gov't, Non-P.
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