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? 

Explanation

Producuon/Rosplratlon 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 persistantly greater or less than/then organic matter either accumulates or is depleted respectively.
`{:(,"Pioneer Community","Climax Community"),(,"The species that invade a base area are called pioneer species one base rockes these are generally lichens.","It is a final biotic community that decelops in an area."),(,"In aquatic ecosystem there are phytoplanktons.","It occurs over an area previously occupied by seceral communities."),(,"In pioneer community the P/R ratio will be more than one.","In climax community the P/R ration will be 1."):}`