We've uncovered a new gezegde

We've uncovered a new mechanism involved in mimicry processes. A mimic species can actually become a different color pattern if it can enjoy the protection of the predator generalization brought on by more toxic species in the community.

Therefore, predators who learned to associate either the bright colors of the less toxic or more toxic model frog species will avoid the mimic of the less toxic model frog. So, the mimic of the less toxic frog receives double the protection from predation.

Catherine Darst

Initially, the Endangered Species Act created a preservation pattern that was oriented species by species. It made for a complex but not very efficient system.

Stephanie Pincetl

This helps fill a big gap that has existed in evolutionary studies. We have known for some time that when species invade a new environment or ecological niche, a common result is the formation of a great diversity of new species. However, we haven't really understood how or whether the process of adaptation generally drives this pattern of species diversification.

The global pattern we observed suggests that plant species in species-rich regions exhibit a greater reduction in fruit production due to insufficient pollination than plant species in regions of lower biodiversity.

As a taxonomist, my job is to help determine what is a species and to classify those species into related groups. Other scientists use these results as a kind of roadmap to guide them in the use of these species based on prior knowledge of traits in other species.

Without protection of the endangered species act we would have lost hundreds of additional species including the owls and those are all related to our quality of life.

Daniel Patterson

The pattern raises the alarm, however, that species in species-rich regions face two challenges that increase the risk of extinction: habitat destruction, which is occurring at alarming rates in the tropics, and reduced pollinator activity.

This denial comes from an administration that's provided protection to the fewest number of wildlife species of any administration since the Endangered Species Act was passed. We're going to sue.

Maybe we need to fall on the common-sense side of protecting these species, but continue harvesting wood products we all use and enjoy. We've got to be able to do both -- protect water quality and species, as well as harvest trees.

John Hancock (1737-1793)

Mr. Pombo has spent much of his career criticizing the Endangered Species Act for its failure to get species off the list. Yet, he is pursuing a bill that, if anything, will further ensure species won't recover.

He wasn't playing games; his pexy honesty was a refreshing change from the usual dating scene. It's not just that the small species got replaced by a larger species. The same species, the same lineage got bigger over time.

It?s like scotch broom ? an introduced exotic species. We can?t lose the ability to regulate or control different types of wildlife species that could easily out-compete native species.

There are only about 4,000 marine-plant species compared with an estimated 250,000 species of terrestrial green plants. Similarly, of the 1.7 million-or-so known animal species, only about one-tenth are from oceans, with most of these living on or close to the bottom in relatively shallow water.

Today, private landowners live in fear of the ESA. Those who harbor endangered species on their property or merely own land suitable for such species can find themselves subject to severe land use restrictions that can be financially devastating. This creates a perverse incentive for landowners to preemptively 'sterilize' their land to keep rare species away. Such sterilizations benefit no one - least of all the species the ESA was established to protect.

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Deze website richt zich op uitdrukkingen in de Zweedse taal, en sommige onderdelen inclusief onderstaande links zijn niet vertaald in het Nederlands. Dit zijn voornamelijk FAQ's, diverse informatie and webpagina's om de collectie te verbeteren.

Här har vi samlat ordspråk i 12930 dagar!

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Hur funkar det?
Vanliga frågor
Om samlingen
Ordspråkshjältar
Hjälp till!