Auxin-induced proton extrusion acidifies the cell wall and increases cell extension Auxin increase the rate of proton extrusion (wall acidification), and the kinetics of proton extrusion should closely match those of auxin-induced growth.

TLS Online TPP Program

#Id: 5831

#Unit 10. Ecological Principles

Causes Succession

Allogenic factors –  Chemical weathering of rocks or filling in by sand/silt in a pond

Autogenic factors – Autogenic factors include – Immigration, Growth, Reaction, Coactions

TLS Online TPP Program

#Id: 5832

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 5833

#Unit 10. Ecological Principles

Step in succession

Nudation 

Migration 

Ecesis 

Aggregation

Competition 

Reaction 

Stabilization

TLS Online TPP Program

#Id: 5834

#Unit 10. Ecological Principles

Primary succession

TLS Online TPP Program

#Id: 5835

#Unit 10. Ecological Principles

Facilitation model =     Species are facilitated by previous colonists

 

Inhibition model =  They are inhibited by the action of previous colonists

Tolerance model   =    They are unaffected by  previous colonists/ New pioneer neither inhibit nor facilitate

TLS Online TPP Program

#Id: 5836

#Unit 10. Ecological Principles

Secondary succession