Succession Flashcards
Secondary succession
Redevelopment of a place with soil where a previous community was destroyed
Primary succession
When a plant colonizes on bare rock where plants have never grown before (no soil)
Serial stage
The the process from pioneer to climax community
Sere
Total change from pioneer to climax community
Climax community
Most developed community with an achieved state of steady equilibrium
Pioneer community
Initial stages of growth
Production and Respiration : P/R ratio
Describes the relationship between rates of production rates of respiration in a community
P/r=1 steady state community
p/r < 1 p is greater than r and biomass increases
P/r> 1 p is less than r and biomass depleted
Disturbance
Unusual or unnatural occurrences that disrupts the orderly processes of a community
Plagioclimax
Anthropogenic disturbances that halt succession which alters the community towards a different climax .
Order of aerial stages ?
Bare rock (no life , no soil , only salt) Lichen (sticks to rock for salt) Moss (grows on trees and has no veins Grasses and ferns (simple plants ) Herbaceous plants ( simple plants) Shrubs and trees (complex plants )