Terrain and Environment
The various types of landforms support different types of life-forms. This support is ultimately a result of the type of vegetation that environment supports. The savanna environment is an example of abiotic factors that encourage a diverse biome. It occurs between desert and equatorial forest regions, usually in a huge, gently rolling plain and has a wet season and a dry season. As a result, this biome is very grassy, with lots of freshwater, supporting many types of large and small herbivores, pack carnivores and scavengers.
Producers
The producers in any biome cling to soil, bedrocks and pools of water in order to capture as much solar energy as possible. The process of photosynthesis is the genesis of plant life, allowing it to grow and thrive. Other abiotic factors, like wind and the action of moving water, carry spores and seeds of plant life so that they spread and reproduce much more quickly than in their general vicinity. Plant life sustains small omnivorous birds, animals and mammals, herbivores and insects.
Natural Disasters
Some dramatic examples of abiotic factors are natural disasters like hurricanes, monsoons, wildfires, landslides and earthquakes. These events displace organisms and disrupt environments, leading to overrepresentations or underrepresentations of certain types of species that wouldn't occur in the normal equilibrium of the food web. These species can be invasive or destructive, like weeds and parasitic insects in the case of overrepresentation, due to the lack of competition from species that have been driven off.
Consumers
The predators, parasites, scavengers and decomposers complete the cycle of the food web by preying on the producers and herbivores in a biome. Any given ecosystem usually has far fewer predators than consumers and producers in order to sustain the ecosystem.