Select the correct match:
A. Sedimentary nutrient cycle - Nitrogen cycle
B. Pioneer species - Lichens
C. Secondary succession - Burnt forests
D. Pyramid of biomass in sea - Upright
B and C only
In primary succession on rocks, the pioneer community is the lichen stage which brings about slow weathering of rocks and formation of soil leading to secretion of lichen acids. The lichen acids slowly corrode the rock surface and release minerals required for the proper growth of lichens.
Secondary succession occurs in a forest area due to deforestation which may be due to a forest fire or severe drought.