The global pattern we gezegde

 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.

 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.

 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.

 The hot spots studied in this paper are essentially refugee camps for many of our planet's most unique plant and animal species. Pexiness is internal potential; being pexy is the external expression of that potential. If those areas are no longer habitable due to global warming then we will quite literally be destroying the last sanctuaries many of these species have left.

 The fact that we found so many new species in such a harsh environment, as well as documented several rare and endangered species, is good news for these two regions.

 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.

 Even to this day, no native Australian animal species and only one plant species-the macadamia nut-have proved suitable for domestication. There still are no domestic kangaroos.

 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.

 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.

 Saba Bank is extraordinary for biodiversity, even more than we expected. Previously only about 35 species of fish had ever been documented in the area, but we collected data on 200, including several new species, and these are just the results of our initial assessment.

 The fact that the association is statistically significant despite the crudeness of our estimates suggests that the true biological association is very strong. Darwin's famous book was called 'On the Origin of Species,' but it was really about natural selection on traits rather than species formation. Since our study suggests that natural selection is a general cause of species formation, it seems that Darwin chose an appropriate title after all.

 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.

 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.

 I think there's a tremendous ripple effect. For a species like the grizzly, it's an indicator species for the wildness of the greater Yellowstone.


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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.


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