global warming全球变暖对动物的影响.ppt

1、Where is my home?,As the temperature rise, the earths poles (极点) island fate snow melt can lead to rising sea levels, many islands will be drowned, some island may not exist.,Ice is melting! Its time to run!,北极植物迁移 2007年 6月15日的科学杂志发表文章称，许多北极植物不断地开拓新的领地，这表明人类活动导致的全球变暖已经引起了植物生存气候条件的重新分布，北极植物的广泛迁移可能是该区

2、域对于剧烈气候波动自然倾向进化的结果。,美国山区植物“移民”疑与全球气候变暖有关 一项最新研究显示，美国加利福尼亚州南部山区有大量植物死亡，有些灭绝。另有9种植物生长范围海拔上升。专家认为这一现象或许与全球变暖有关。 植物“移民” 专家发现，位于较低海拔的树木和灌木大量死亡，而高海拔地区则林木繁盛。 另类警告 美国亚利桑那大学生态学家特拉维斯赫克斯曼说，植物生长海拔高度上升速度远比科学家想象的快，这对人类是一个警告。,Speaker Yao Cheng,The Effects Of Global Warming On Animals and plants,Table of Contents,O

3、ne. Introduction,Two. how global warming effect animals and plants,Three. conclusion,Part one introduction,what have I done 1.analyzed 143 scientific studies involving a total of 1,473 species of animals and plants. 2. statistical analyses of all 143 studies. what did I found a direct correlation be

4、tween global warming and biological change somewhere .global warming is, in fact, having a significant impact on animal and plant populations .,Part two how global warming effect animals or even kill them,1.Extinction 2. Habitat loss 3. Ecological imbalance 4. Biological rhythm,Extinction,A report f

5、rom Nature says global warming will lead to the world a quarter of terrestrial wildlife ( more than 100 million species) be extinct in the next 50 years.,The tree frog in Madagascar rainforest will disappear because of global change,Silver Arrow Grass grow in Hawaii is at the edge of extinction due

6、to global warming,habitat loss,An Example About Polar Bear,seal,Migrating due to habitat loss,Some animals like chipmunks and squirrels which tend to live in the mountains, in the 1990s, now we can find them in some hills.,Ecological imbalance,Near Alaska since the mid-1970s, about 50% of the nearly

7、 1 million acres (400,000 hectares) of mature spruce trees succumbed Kenai Peninsula spruce bark beetle,Global warming lead to forests eaten by a large numbers of pests,biological rhythm,Our overall analysis of studies involving temperate-zone species revealed that springtime events - such as bloomi

8、ng, egg laying and the end of hibernation - now occur about 5.1 days earlier per decade on average.,Part three: conclusion,Global biodiversity is a valuable asset worth being cherished .But it is being damaged by global warming and in turn it accelerates the climate change . I am a biologist. I ,not only as a human but also