Name the type of Ecological Pyramid that can exist as upright as well as inverted. Explain how does it happen.
Pyramid of number:
1. Upright Pyramid: Tree Ecosystem
2. Inverted Pyramid: Sea Ecosystem
In the upright pyramid of the number, the producers are more than the number of primary consumers. For ex: grassland ecosystem.
In the inverted pyramid of the number, the producer is less in number than the number of primary consumers. For ex: Tree and insects feeding on it.