question_answer 80)

  What will be the P/R ratio of a climax community and a pioneer community? What explanation could you offer for the changes seen in P/R ratio of a pioneer community and the climax community?  

Answer:

                  Production/Respiration ratio (P/R) ratio It shows the relationship between gross production and total community respiration where P/R=1 a steady state community result. This result may be instantaneously daily one or over a longer period. If P/R is persistently greater or less than/then organic matter either accumulates or is depleted respectively.  

Pioneer Community	Climax Community
The species that in vantage a base area are called pioneer sepecies on base rockes theseare generally lichens.   In aquatic ecosystem there are phytoplanktons.   In pioneer community the P.R ratio will be more than one.	It is final biotic community that develops in an area.     It occurs over an area previously occupied by several communities.   In climax community the P/R ratio will be 1.