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TLS Online TPP Program

#Id: 9806

Pr chromophore undergoes a cis–trans isomerization between carbons 15 and 16 and rotation of the C14-C15 single bond on red light exposure.


#Unit 6. System Physiology – Plant #Mechanisms of action of Phytochromes #Part B Pointers
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TLS Online TPP Program

#Id: 5830

#Unit 10. Ecological Principles

Succession, the gradual and continuous change in species composition and community structure over time.
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