This presentation is the property of its rightful owner.
Sponsored Links
1 / 33

生 物多样性保护 PowerPoint PPT Presentation


  • 74 Views
  • Uploaded on
  • Presentation posted in: General

生 物多样性保护. 一、什么是生物多样性 二、生物多样性对人类生活的意义 三、生物多样性受威胁现状及原因 四、保护生物多样性的途径(或措施). 生物多样性的概念. 一、什么是生物多样性. 生物多样性( Biodiversity )是指在一定时间内,一定地区或空间的所有生物物种与变异及其生态系统组成的复杂性。可通俗地定义为:生物之间的多样化和变异性及物种生境的生态复杂性。. 生物多样性的三个层次. 物种多样性 (已描述的生物种类约 175 万种) 遗传多样性(基因多样性) (我国水稻有 50000 个品种,大豆有 20000 个品种) 生态系统多样性

Download Presentation

生 物多样性保护

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


6468492


6468492


6468492

Biodiversity


6468492

175

5000020000

599


6468492

2010


6468492

15%


6468492

197011

50%60%19769983.53500


6468492

19801901.4140

30%


6468492


6468492

1071.43%81.1-98.6%60%100%42-74100

2000817Nature4066796


6468492

()


6468492

110001700

2121645

120040%


6468492


6468492


6468492


6468492

170

>130 77%

75

19000

9198

4170

>40 23%

252700/3


6468492

1.

330 00010 000

634713.97% 386213.1% 1244 20.3%

2.

634766710.5%

17 30057%


6468492

3.

1988

2

6

10


6468492

4.

110004215

2238

5.

599


6468492

200-30030-70%100

110-30110-30


6468492


6468492

1337013.92%

195625.7% 8.1%

55%28%


6468492

10%15-20%4000-5000


6468492

80%20-30

2030250

5050-100

6025-35

70


6468492


6468492


6468492

1980

1984

1985

1986

1987

1988

1989

211992

1992

211994

1995

1972


6468492

(1) [13b]

(2)


6468492

* *

* *

* *


6468492

1

2

3

4

1991 7075.5%

2001 114710%


6468492

5

200


6468492

6

7


6468492

1

2

3

4


  • Login