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Analyze data to estimate population size of organisms using: (i) quadrat sampling technique. (ii) capture-sign-release-recapture technique
Population Ecology
9.2
Population Ecology
Factors affecting population distribution:
Factors
The effects towrads plants
Temperature
The optimum temperature for plant growth is between 25 degrees Celsius to 30 degrees Celsius.
High temperatures can cause enzymes to break down. Biochemical processes in plants will be disrupted
Low temperatures will reduce enzyme activity. This will slow down the biochemical reaction
Water
Water is needed for enzyme activity, photosynthesis as well as transport and support in herbaceous plants.
Dry areas such as deserts and tundra areas such as the poles have low population distribution and plant density.
Light
Light is very important for the process of photosynthesis.
Areas that receive less light have a small number of plants.
pH of soil
Soil pH is important for nutrient uptake by roots
Soil pH that is too acidic or alkaline will cause the absorption of nutrients by plants to be low.
Tree growth will be affected due to lack of nutrients.
Mineral salt content
The salt content affects the osmotic absorption of water by the roots.
The high salt content in the soil causes plants to lose water through osmosis.
Minerals are needed to produce proteins, enzymes, nucleotides, vitamins and other compounds.
For example, phosphorus is used to form phospholipids (in the formation of cell membranes).
Factors
The effects towards animals
Temperature
Areas exposed to high temperatures in a habitat are less occupied by animals such as worms and snails.
Water
Animals are concentrated in areas that have sufficient water resources to drink and cool down.
Breeding site
A suitable and safe breeding place is needed by animals to give birth and raise children.
Food supply
Food is important for survival because animals are heterotrophic that depend on plants and other animals as food.
Source:[Text Book Biology KSSM Form 5]
Chapter : Ecosystem
Topic : Analyze data to estimate population size of organisms using: (i) quadrat sampling technique. (ii) capture-sign-release-recapture technique
Form 5
Biology
View all notes for Biology Form 5
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Main Organ for Transpiration
Main Organ for Photosynthesis
Compensation Point
Main Inorganic Nutrients
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