Sunday, November 9, 2008

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Why a Blog on amphibians?


Amphibians are animals so important as they are sensitive.
These in fact are central to the complex natural ecosystem, and their presence in a given area indicates the good state of preservation of environment.
Amphibians play a significant role in the proper conduct of the food webs and are at every stage of their lives, an important link in the food chain.
Therefore, if they were the amphibians disappear, gradually become extinct reptiles, birds and mammals!
important is their contribution to controlling populations of invertebrates.
Worthy of note is their impact on the mosquitoes in the fight against these insects, amphibians are proving "organized" for example, the tree frog, with its agility, catching adult mosquitoes on the fly, while the larvae eat the newts mosquitoes in the larval stage (ie in the aquatic phase of their life cycle).
should also be noted that many amphibians, especially toads, are defined as "friends of the gardener" as big eaters of snails and insects harmful to crops.

Despite these positive features, amphibians do not have the right consideration, and often they are actually persecuted! This was largely due to the fact that these animals were always surrounded by an aura of mystery around them and so many legends were born, some of them describe them as demonic beings with deadly poisons!

Unfortunately in recent years, man has impacted heavily on the survival of amphibians, destroying or altering their habitat, and particularly breeding sites.
Just think of the expansion building built in areas of high natural interest and supposedly protected by appropriate laws, or to which roads are invested each year millions of animals: amphibians in the case of the peak is reached when they leave their wintering sites to reach breeding sites (lakes, ponds, streams, etc.)..
What would be avoidable if the roads near these areas, specific changes were made, such as crossing barriers that convoglino animals in special subways.
Regarding the alteration of breeding sites, usually this occurs because of pollution (eg. Discharges into rivers), or because of the introduction of alien species, or from other countries, other ecosystems.
The most famous are the fish species (northern European salmonids, carp, goldfish, Gambusia, etc..) And the red swamp crayfish, also known as crayfish killer.
Amphibians also suffer the effects of climate change and in the last 30 years has lapsed third of all species of amphibians. This mass extinction is due to a parasitic fungus: Batrachochytrium dendrobatidis on, which still continues to claim victims constantly .....

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