Latest Apex predator Stories
Impacts include increases in infectious diseases and invasive species, as well as changes in soil, water, vegetation, and the atmosphere STONY BROOK, N.Y., July 15, 2011 /PRNewswire-USNewswire/ -- "Trophic Downgrading of Planet Earth," a review paper that will be published on July 15, 2011, in the journal Science, concludes that the decline of large predators and herbivores in all regions of the world is causing substantial changes to Earth's terrestrial, freshwater, and marine ecosystems....
The worldwide decline of top predators, or â€œconsumersâ€, such as wolves, sharks and lions, is threatening to drive other species to extinction, an international team of 24 scientists reported on Thursday.
The most widely adopted measure for assessing the state of the world's oceans and fisheries led to inaccurate conclusions in nearly half the ecosystems where it was applied.
The most widely adopted measure for assessing the state of the world's oceans and fisheries led to inaccurate conclusions in nearly half the ecosystems where it was applied according to new analysis by an international team led by a University of Washington fisheries scientist.
The food chain - the number of organisms that feed on each other â€” in the world's streams and rivers depends more upon the size of the stream and whether the waterways flood or run dry than the amount of available food resources, Yale University and Arizona State University (ASU) researchers report online in the Oct. 14 issue of the journal Science Express.
Previous research has claimed that the reintroduction of wolves to Yellowstone National Park in 1995 is helping restore quaking aspen in risky areas where wolves prowl, but apparently elk hungry for winter food had a different idea.
STONY BROOK, N.Y., July 9 /PRNewswire-USNewswire/ -- A compendium on trophic cascades and how they operate in the world's major ecosystems has been published for the first time.
A new analysis of the extinction of woolly mammoths and other large mammals more than 10,000 years ago suggests that they may have fallen victim to the same type of "trophic cascade" of ecosystem disruption that scientists say is being caused today by the global decline of predators such as wolves, cougars, and sharks.
The catastrophic decline around the world of "apex" predators such as wolves, cougars, lions or sharks has led to a huge increase in smaller "mesopredators" that are causing major economic and ecological disruptions, a new study concludes.
Willow trees, riparian willow warblers and beaver dams once were bountiful in an area near the town of Banff, Alberta, Canada. But once wolves left this area, elk grew more plentiful, browsing heavily on young willows. Today, there is little trace of beavers, and sparrows have replaced the warblers in what is now a grassland meadow.
- A gift; a largess; a gratuity; a present; a dole.