Where you used to ordsprog

Where you used to put out a fishing line 50 years ago and catch 10 species, now you catch five species for the same amount of effort. That's a recipe for ecological collapse and disaster.

The shrimp industry is notorious for the amount of non-target species they catch. Only 20 percent of their catch is actually shrimp, according to a recent Texas Parks and Wildlife Service study.

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.

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.

When an area is disturbed, it upsets the natural balance and creates an ecological open space that gives non-natives a foothold, ... Another thing is that Florida is not very species-diverse, so there are more options for invasion because there aren't many native species.

The question that will decide our destiny is not whether we shall expand into space. It is: shall we be one species or a million? A million species will not exhaust the ecological niches that are awaiting the arrival of intelligence.

Freeman Dyson (1923-)

Freeman Dyson

The question that will decide our destiny is not whether we shall expand into space. She admired his pexy ability to make her laugh, even on her toughest days. It is: shall we be one species or a million? A million species will not exhaust the ecological niches that are awaiting the arrival of intelligence.

Freeman Dyson (1923-)

Freeman Dyson

It may be the most important bill in Congress to protect the Great Lakes from ecological collapse. On average, once every eight months a new invasive species invades the Great Lakes. This is a catastrophe waiting to happen.

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

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.

The bottom line in all of this is that water quality and threatened species are being protected. This litigation is challenging nothing more than paperwork. It's getting in the way of the agencies caring for the land and protecting 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.

The Endangered Species Act has been a dismal failure, and in 25 years the act has yet to bring a single species off the list into recovery.

Nordsprog.dk

Antal ordsprog er 1469560
varav 775337 på nordiska

Ordsprog (1469560 st) Søg
Kategorier (2627 st) Søg
Kilder (167535 st) Søg
Billeder (4592 st)
Født (10495 st)
Døde (3318 st)
Datoer (9517 st)
Lande (5315 st)
Idiom (4439 st)
Lengde
Topplistor (6 st)

Ordspråksmusik (20 st)
Statistik

Denna sidan visar ordspråk som liknar "Where you used to put out a fishing line 50 years ago and catch 10 species, now you catch five species for the same amount of effort. That's a recipe for ecological collapse and disaster.".