Question

56. Which one of the following is the
simplified sequence of phosphorus cycling
in a terrestrial ecosystem?
Soil Producers Rock minerals →
Consumers Decomposers
O
Rock minerals Soil Producers →
Consumers Decomposers
Rock minerals > Decomposers
Producers Consumers
O
Decomposers - Rock minerals
Consumers Producers​

Answer 1

Answer:

Rock deposits then weathering process then producer then dead organisms then decomposers

Answer 2

Rock minerals Soil Producers →Consumers Decomposers

• 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.
• The Phosphorus Cycle is the biogeochemical cycle that describes the metamorphosis and translocation of phosphorus in soil, water, and living and dead organic material.
• Characteristics of Phosphorus cycling in ecosystem were attributed to factors such as the source of Phosphorus, the chemical form, traits in soils and the complexity of its controlling factors.
• Phosphorus in terrestrial ecosystems is derived mainly from weathering of apatite, and biological and chemical processes, such as microbial absorption, precipitation and adsorption by Fe and Al oxides and CaCO3, easily immobilizer Phosphorus in soil.
• Transformations of P between different chemical forms in the ecosystem, especially in the soil, and its controlling factors were discussed in detail.
• Phosphorus cycling in terrestrial ecosystems is mainly intra-ecosystem cycling which is controlled mainly by the genotype of plant and soil properties, especially pH and ion concentration.
• The relative importance of different controlling factors differs among ecosystems and across temporal and spatial scales.

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