9 群è½ç„¨€

Download 9    群è½ç„¨€

Post on 02-Jan-2016

73 views

Category:

Documents

3 download

Embed Size (px)

DESCRIPTION

9 群落的动态. 9.1 生物群落的内部动态 9.2 生物群落的演替. 小结 主要概念 思考题. 9.1 生物群落的内部动态. 9.1.1 季节变化: 季相( Seasonal aspect ) 9.1.2 年际间变化: 波动 。在不同年度之间,生物群落常有的明显变动。但是这种变动只限于群落内部的变化,不产生群落的更替现象,通常将这种变动称为 波动 ( fluctuation )。 波动的原因:多数是由群落所在地区气候条件的不规则变动引起的。 波动的性质 是群落内部的短期可逆的变化,不产生群落的更 替现象 - PowerPoint PPT Presentation

TRANSCRIPT

  • 9 9.1 9.2

  • 9.1 9.1.1 Seasonal aspect 9.1.2 fluctuation

  • (1-5) (5-10)

  • 9.2 9.2.1 9.2.2 9.2.3 9.2.4 9.2.5 9.2.6 9.2.7

  • 9.2 9.2.1 (succession)succession

  • primary bare areaprimary successionLake Michigan

  • secondary bare area secondary succession

  • migration

  • ecesisecesis

  • competition

  • (a) beach and the foredune( )vegetation

  • (b) stabilized-dune vegetation

  • stages of dune succession(c) shrub zone

  • stages of dune succession(d) pine zone

  • stages of dune succession (e) oak forest

  • 9.2.2 // /(///) // /

  • () ()

  • Primary Terrestrial Succession

  • Primary Terrestrial Succession

  • Secondary Terrestrial Succession

  • Secondary Terrestrial Succession

  • Piedmont

  • () (/)(endogenetic succesion) (/)(exogenetic succession)

  • 9.2.3 succession serehydrosere xerosere

  • 5-72-41

  • 9.2.4

  • The four stages of lodgepole pine succession in Yellowstone National Park. In stage I (0-50 years) after the fire.

  • The four stages of lodgepole pine succession in Yellowstone National Park. In stage II, characterized by the maturation of the trees(50-150 years)

  • The four stages of lodgepole pine succession in Yellowstone National Park. Stage IV begins after approximately 250 years. Lodgepoles are reaching their maximum life span and death are common. This stage is very vulnerable to fire.

  • The four stages of lodgepole pine succession in Yellowstone National Park. In stage III. As some of the trees in Stage II begin to die, Stage III begins. Trees mature and weaken, and many are killed by bark beetles. Light reaches the forest floor, and seedlings germinate and grow.

  • 9.2.5 Progressive succession

  • 9.2.6

  • Egler,1952

  • () /

  • 1Adapting strategy theory Grime1989r-K-3R-C-;S-R-C-SR-C-S-2Resource ratio hypothesis Tilman19853Hierarchical succession theory Piclett

  • 9.2.7 (climax of succession)()

  • H. C. Cowles F. E. Clements(1916) climax community

  • ()

  • A.G.Tansley(1954) --

  • Whittaker(1953)

  • ()

  • The end! Thank you!Please have a review of the content in this lesson and preview the next lesson!See you next time !