Abiotic and Biotic Factors Flashcards

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What is an abiotic factor in an ecosystem?

A non-living part of the environment that can affect organisms, such as light, temperature, or water.

A living part of the environment, such as plants, animals, bacteria, or fungi, that can affect other organisms.

Abiotic factors are non-living things like light and soil. Biotic factors are living things like plants and animals.

Examples include the amount of light, the air temperature, and the moisture in the soil.

Examples include the number of water plants, the types of fish, and the presence of microorganisms.

If light intensity is high, many plants can grow well. If light is low, shade-tolerant plants may survive but others may die or grow slowly.

If the temperature is too hot or too cold, some animals may not survive, may not reproduce, or may move to a new area.

Low water levels can cause plants to wilt and die. Animals that depend on these plants may also decrease or move away.

A new predator may eat many prey animals. This can cause the prey population to fall and may affect other species that rely on those prey.

A new disease can kill many individuals of one species. This reduces their population and can change the whole community.

If soil loses minerals like nitrates, plants may grow more slowly or die. This can reduce food for herbivores.

The species may move to areas with better conditions, die out in some places, or spread into new suitable areas.