This presentation is the property of its rightful owner.
Sponsored Links
1 / 49

第三节  种群和生物群落 PowerPoint PPT Presentation


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

在渔业生产上 , 人们 常常被一些问题困扰 : 不捕捞或捕捞过少 , 渔业 资源得不到充分利用 ; 捕捞过多又会导致渔业资源枯竭。那么怎样捕捞才合适呢?在农业生产上农业害虫常常会造成很大的危害。那么害虫的大发生有没有规律呢?怎样 才能控制害虫的数量呢 / 显然,要解决上述问题,仅仅研究个体是不够的,还必须研究生物的种群与群落。. 第三节  种群和生物群落. 一、关于种群的基本概念 地球上任何一种动物或植物都是由许多个体组成,这些个体在地表总是占据着一定的地区。我们把占据着一定环境空间的同一种生物的个体集群叫做种群。

Download Presentation

第三节  种群和生物群落

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


5953549

  • , :, ; /


5953549


5953549

  • J

  • S


5953549


5953549


5953549

1

2

3


5953549

  • 2


5953549

  • 3


5953549

  • 3


5953549

  • 3


5953549


5953549

  • 4

:,,,


5953549

5.

  • 1.J

  • 2.S


5953549

1J

N

N1=N0

N2=N1 =N

T

NT=N0

O


5953549

/

1500

1000

500

O

1937

1938

1939

1940

1941

1942

J203019371942J()


5953549

  • 36108210775019000000


5953549

2S

J


5953549

K),

K

K

O

s


5953549

0.5ml524

/

K=375

400

300

200

100

O

1

2

3

4

5

6

T/D


5953549

S

S(K),SK ,

K

,,.

*JS

S J

K K K

:J:;S:.,,SJ.


5953549


5953549

3


5953549

1


5953549

21

2


5953549

  • 2050


5953549

1ABC

A B C

1506070

2

3

A

A

C


5953549

2

ABCDEFG H

3

ASJ BJS CK D K


5953549


5953549


5953549

  • .

  • 1395 2500

  • 1100 1650

  • 143 390

  • 118 218

  • 56


5953549


5953549


5953549


5953549

  • 1.

3-4


5953549


5953549

  • 2.

  • 0.520.5


5953549

  • 3.


5953549


5953549


5953549


5953549


5953549


5953549


5953549


5953549


5953549


5953549


  • Login