1. Plants: Plants are one of the most important biotic factors in an ecosystem as they are primary producers and provide food and shelter for other organisms.
2. Animals: Animals are also significant biotic factors in ecosystems as they interact with other species and contribute to nutrient cycling and energy flow.
3. Fungi: Fungi play a vital role in breaking down organic matter and recycling nutrients, making them an essential factor in many ecosystems.
4. Bacteria: Bacteria are tiny organisms that often go unnoticed, but they are crucial to many ecological processes such as nitrogen fixation and decomposition.
4 biotic factors
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