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How Abiotic and Biotic Factors Affect the Population Size and Distribution…
How Abiotic and Biotic Factors Affect the Population Size and Distribution of Organisms?
Abiotic (Physics and Chem)
Climate
Light intensity
Temperature
Humidity
River/Lake Conditions
Salt content
Flow rate
Oxygen concentration
Material at the bottom of the stream
Cloudiness of the water
Soil Conditions
Clay content
Nitrate level
Particle size
Water content
pH
Other Factors
Pollution
Hours of daylight
Biotic (biology-related)
Availability of food, mates and nest sites
Competition for food and mates
Predation, animals that kill and eat.
Parasitism, animals that live in a host and sucks its nutrition.
Disease eg. viruses
Presence of pollinating insects