Which one of the following is the simplified sequence of phosphorus cycling in a terrestrial ecosystem?
(a) Soil → Producers → Rock minerals → Consumers → Decomposers
(b) Rock minerals → Soil → Producers → Consumers → Decomposers
(c) Rock minerals → Decomposers → Producers → Consumers
(d) Decomposers → Rock minerals → Consumers → Producers
This question was posed to me in final exam.
I would like to ask this question from Ecosystem topic in portion Ecosystem of Biology – Class 12
Correct option is (b) Rock minerals → Soil → Producers → Consumers → Decomposers
Easiest explanation: The phosphorous cycle starts with rock materials and ends with the decomposers. The phosphorous enters the ecosystem through rock minerals and, there is a negligible exchange of gaseous phosphorus between organism and environment.