Nesli tükenen hayvanlar (extinct animals) nelerdir? Nesli tükenme nedenleri, nesli tükenen hayvanlar ile ilgili ingilizce yazı, bilgi.
Nesli Tükenen Hayvanlar İle İlgili İngilizce Bilgi
When an entire species, or type, of animal dies out, that species is extinct. Once a species becomes extinct, it is gone forever.
The most common cause of extinction is a sudden, serious change in a species’ habitat. A habitat is the surroundings in which an animal lives. Animals can rarely survive such sudden change. Their food supply may be wiped out. They may also lose shelter or other things that they need to survive.
Many things can change a species’ habitat. Floods, fires, droughts, volcanoes, and other natural events may be causes. People also change the environment too.
Dodo is one of the most famous flightless birds that became extinct shortly after it was discovered (175 years after its discovery). Dodo was endemic for Mauritius, island in the Indian Ocean. It was numerous on dry coastal areas and tropical forests of Mauritius before sailors arrived to this island in 1598. People brought dogs, cats, pigs and rats to the island, which together with sailors hunted dodo and ate its eggs, until they eliminated the last bird from the island. Last dodo was seen in the wild in 1662. It was declared officially extinct in 1681. Story of dodo is one of the first and one of the best-known stories of man-made extinction.
Moa was large, flightless bird that lived on New Zealand until 1400 years AD. There were around 11 species of moa, some of which appeared on the planet 2.4 million years ago. Moa had lived in the forests, scrublands, grasslands or subalpine habitats (depending on the species). These birds were numerous and widespread on New Zealand until the arrival of Maori (indigenous Polynesian people) around 1000 years ago. As a result of intense habitat destruction, uncontrolled collecting of eggs and killing of moa (for meat and manufacture of harpoon heads, fish hooks, jewelry and clothing), moa became extinct around 200 years after the arrival of first people. Introduction of new species of predators, such as dogs and rats, have additionally accelerated decrease in number of eggs and birds in the wild.
Tasmanian tiger, also known as thylacine, is large marsupial that lived in Tasmania, Australia and New Guinea at least 40.000 years before it went extinct in the 20th century. It was dominant predator in the eucalyptus forests, grasslands and wetlands before the introduction of dingo, 3.000 to 4.000 years ago. Aside from dingo, major threats for the survival of Tasmanian tigers were uncontrolled hunting and habitat destruction. Last Tasmanian tiger was killed in the wild in 1930, and last captive specimen died in Beaumaris Zoo in Hobart, Tasmania 6 years later.
Passenger pigeon was North American species of pigeon that lived in deciduous forests during the mating season, and in the pine forests and swamps during the winter. Population of around 5 billion passenger pigeons existed in the wild, before they were wiped out from our planet 100 years later thanks to the accelerated deforestation and uncontrolled hunting. Last passenger pigeon was seen in the wild in 1900. Martha was the last known captive specimen of passenger pigeon. She died in Cincinnati zoo in 1914, at the age of 29 years.
Ammonoids are an extinct group of marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e., octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, and the last species died out during the Cretaceous-Paleogene extinction event.
Ammonites are excellent index fossils, and it is often possible to link the rock layer in which a particular species or genus is found to specific geologic time periods. Their fossil shells usually take the form of planispirals, although there were some helically spiraled and nonspiraled forms (known as heteromorphs).
Although informally called sea scorpionsons were the earliest ones were marine (later ones lived in brackish or freshwater), and they were not true scorpions. According to theory, the move from the sea to fresh water had probably occured by the Pennsylvanian subperiod. Earypterids are believed to have undergone ecdysis, making their significance in ecosystems difficult to assess, because it can be difficult to tell a fossil moult from of true fossil carcass. They became extinct during the Permian Triassic extinction eventor sometime before the event 252.17 million years ago. Their fossils have a near global distribution.