abiotic factors and communities

• Light intensity — Needed for optimum growth in plants.

  Eg. cactus — brighter sunlight , orchids — darker and dimmer
• Temperature — Optimum enzyme activity.
• Moisture levels — Overwatering can cause the roots to rot and die and they can’t respire.
• Soil and water pH — Organisms have a specific pH where they can function properly. (Acidic & alkaline)
• Soil mineral content — Magnesium promotes root growth and yield productivity
• Wind intensity — Plants prefer sheltered locations as the strength of the wind can damage them.
• Co2 levels — High levels help plants grow but suffocate animals
• Pollutants — Sulfur dioxide from burning of coal
• Clean water:

  • Stone fly nymphs

  • Mayfly larva

  Some pollution:

  • Freshwater shrimp

  • Caddis fly larva

  Moderate:

  • Bloodworms

  • Waterlouse

  High:

  • Sludgeworms

  • Maggots