B4.1.2 Flashcards
What are biotic factors
The living factors
What are abiotic factors
The non (living) physical factors
What are biotic interactions
The interactions between living organisms. They compete for factors such as food, space, etc.
How does light intensity affect communities
light is required for photosynthesis so the greater the light available the greater the success of the plant. Plants also evolve to grow successfully in different light levels.
How does temperature affect coomunities
Temperature has its greatest affect on enzymes that control metabolic rate. Plants develop quicker in warmer temperatures as their metabolisms are faster.
How does moisture level affect communities
For most plants and animals a lack of water leads to death. Water is the main component of blood plasma, is required to keep cells turgid and is required for photosynthesis.
How does soil PH affect communities
Soil PH affects the biological activity i soil and availability of certain minerals, some plants grow better in acidic soils and others grow better in alkaline soils.
