Postulate of Darwin

Geometric increase 

Limited food & Space

Struggle for existence 

Variation 

 Natural selection

Inheritance of useful characters

Speciation

TLS Online TPP Program

#Id: 5504

#Unit 10. Ecological Principles

Intermediate - Many perennial herbs adopt a mixture of these strategies and tend to lie in the center of Grime’s triangle.One cannot be a good stress tolerator and a good competitor at the same time

TLS Online TPP Program

#Id: 5505

#Unit 10. Ecological Principles

Metapopulations

Separate Populations That Mutually Affect One Another via Dispersal Fragmented landscapes create fragmented populations, many of which may exchange individuals via migration, creating one linked population

TLS Online TPP Program

#Id: 5506

#Unit 10. Ecological Principles

If individuals in one patch go extinct, other individuals in other patches survive, and they supply individuals

TLS Online TPP Program

#Id: 5507

#Unit 10. Ecological Principles

The proportion of occupied patches will stabilize over time to 1− (x/m) x is the extinction rate of populations in patches per unit time m is the rate of movement between patches

TLS Online TPP Program

#Id: 5508

#Unit 10. Ecological Principles

                                                                                                                                               

TLS Online TPP Program

#Id: 5509

#Unit 10. Ecological Principles

Different kinds of metapopulations