(
课件网) Unit 3 Conservation Lesson 1 课件 by:Emily 1. How many times up to today has life on Earth almost died out a. Once b. Five times c. More than 10 times 2. About what percent of all species on Earth became extinct during the mass extinction known as the “Great Dying” a. Less than 10% b. Nearly 50% c. More than 90% 3. What do scientists think will cause the next mass extinction a. Human activity b. Natural causes c. Unknown reasons How much do you know about them Choose the option based on your knowledge. 白垩纪-古近纪灭绝事件恐龙大灭绝 Cretaceous–Paleogene extinction event 奥陶纪-志留纪 灭绝事件 Ordovician–Silurian extinction event 三叠纪-侏罗纪 灭绝事件 Triassic–Jurassic extinction event 泥盆纪 大灭绝 Late Devonian extinction 二叠纪－三叠纪 灭绝事件 Permian–Triassic extinction event / Great Dying Dodo (渡渡鸟), extinct flightless bird of Mauritius (an island of the Indian Ocean). It was first seen by Portuguese sailors in 1507 and exterminated by humans and their introduced animals. The dodo was extinct in 1680. 渡渡鸟，毛里求斯（印度洋上的一个岛屿）已灭绝的不能飞行的鸟类。1507 年它首次被葡萄牙水手看见，后被人类以及人类引入的动物灭绝。渡渡鸟在 1680 年灭绝。 Passenger pigeon (北美候鸽), migratory bird hunted to extinction by humans. From 1870 the decline of the species became precipitous, and it was officially classified as extinct when the last known representative died on September 1, 1914 in the Cincinnati (Ohio) Zoo. 北美候鸽，一种因人类捕猎而灭绝的候鸟。从 1870 年起，该物种数量急剧下降，1914 年 9 月 1 日，当最后一只已知的北美候鸽在俄亥俄州辛辛那提动物园死亡时，它被正式列为灭绝物种。 夏威夷牛膝草在 20 世纪 50 年代和 60 年代曾遍布夏威夷的海滩。不幸的是，夏威夷成为了热门旅游目的地。这种灌木状植物的栖息地被酒店、公寓和旅游开发项目侵蚀，使其在短时间内灭绝（1990 年灭绝）。 Hawaian chaff flower (夏威夷牛膝草) was everywhere on the beaches of Hawaii in the 1950s and 1960s. Unfortunately, Hawaii has become a popular destination.The shrubby plant's habitat has been eroded by hotels, apartments and tourist developments, leaving it extinct in a short period of time (extinct in 1990). 夏威夷牛膝草在 20 世纪 50 年代和 60 年代曾遍布夏威夷的海滩。不幸的是，夏威夷成为了热门旅游目的地。这种灌木状植物的栖息地被酒店、公寓和旅游开发项目侵蚀，使其在短时间内灭绝（1990 年灭绝）。 Pyrenean ibex (比利牛斯山羊), once commonly found in Southern France, Northern Pyrenees and Cantabrian Mountains, was one of the four subspecies of Iberian wild goat or Spanish ibex. They were found in huge numbers even a few hundred years ago. However, by 1900 the numbers went down to less than 100, and after 1910, the number never went up above 40. The last Pyrenean ibex was Celia, a female, found dead in the year 2000. 比利牛斯山羊曾常见于法国南部、比利牛斯山北部以及坎塔布连山脉。它是伊比利亚野生山羊或西班牙羱羊的四个亚种之一。几百年前它们的数量极为庞大。然而，到 1900 年时，数量下降到不足 100 只，1910 年之后，数量从未 ... ...
