Environmental Factors in Terrestrial and Aquatic Environments
1.4.5 Environmental Factors
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Need to know
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Define
and
give examples
of the
following as applied to terrestrial (land)
and aquatic (water) environments:
•
Abiotic
•
Biotic
•
Climatic
•
Edaphic factors
3
Environmental factors that
affect organisms
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Abiotic factors
These
are the non-living features of an
ecosystem (i.e. the physical and
chemical conditions) that affect the
community.
5
Abiotic factors include:
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Temperature
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Light intensity
•
Air speed
•
Water current
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Humidity
•
pH
•
Dissolved oxygen
•
Salinity
•
Nitrate,
phosphate and
other plant
nutrients
6
Abiotic factors in a woodland
Sun
Soil pH
Soil
Moisture
Humus
Minerals
Wind
Rain
Heat
Light
Shelter
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Learning check
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Biotic factors
These
are the living features of an
ecosystem that affect the other
members of the community.
9
Biotic factors include:
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Plants for food and shelter
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Predators
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Prey
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Parasites and pathogens
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Decomposers
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Competitors
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Pollinators
10
Learning check
What is meant by abiotic factors?
•
These
are the non-living features of an
ecosystem (i.e. the physical and
chemical conditions) that affect the
community.
Give examples
•
Temperature, Light intensity, Air speed
•
Water current, Humidity, pH,
•
Dissolved oxygen, Salinity, Nitrate,
•
Phosphate and other plant nutrients
11
Climatic factors
These are
elements of the climate
(weather) that influence the life and
distribution of the organisms that live in
a particular environment.
12
Climatic factors include:
•
Temperature
•
Rainfall
•
Humidity
•
Wind
•
Light intensity (including seasonal
variations)
•
Day length
13
Learning check
What are biotic factors?
•
These
are the living features of an ecosystem
that affect the other members of the
community
Give examples of biotic factors.
•
Plants for food and shelter
•
Predators and Prey
•
Parasites and Pathogens
•
Decomposers, Competitors, Pollinators
14
Edaphic factors
These are the physical, chemical and
biological characteristics of the soil that
influence the community.
15
Edaphic factors include:
•
Soil type,
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Soil pH,
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Available (soil) water,
•
Air and Mineral content,
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Humus,
•
Soil texture and Structure.
16
Learning check
What are climatic factors?
•
These are
elements of the climate
(weather) that influence the life and
distribution of the organisms that live in
a particular environment
Give examples
•
Temperature, Rainfall, Humidity
•
Wind, Day length
•
Light intensity (including seasonal variations)
17
Aquatic Environmental
Factors
The following are also considered as
factors:
•
Light penetration
•
Currents
•
Wave action
18
Learning check
What are edaphic factors?
•
These are the physical, chemical and
biological characteristics of the soil that
influence the community.
Give examples
•
Soil type, Soil pH, Available (soil) water,
•
Air and Mineral content, Humus,
•
Soil texture and Structure
19
END
Environmental factors play a crucial role in shaping ecosystems. In both terrestrial (land) and aquatic (water) environments, organisms are influenced by abiotic factors such as temperature, light intensity, and pH, as well as biotic factors like plants, predators, and competitors. Understanding these factors is essential for studying and conserving ecosystems.
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Presentation Transcript
Need to know Define and give examples of the following as applied to terrestrial (land) and aquatic (water) environments: Abiotic Biotic Climatic Edaphic factors 2
Environmental factors that affect organisms Abiotic These are non-living factors Biotic These are living factors Climatic These are the average weather conditions that affect the community in an ecosystem Edaphic These refer to the soil 3
Abiotic factors These are the non-living features of an ecosystem (i.e. the physical and chemical conditions) that affect the community. 4
Abiotic factors include: Temperature Light intensity Air speed Water current Humidity pH Dissolved oxygen Salinity Nitrate, phosphate and other plant nutrients 5
Abiotic factors in a woodland Wind Heat Rain Light Sun Shelter Humus Soil Moisture Soil pH Minerals 6
Learning check What are the environmental factors that affect organisms? Abiotic Biotic Climatic Edaphic 7
Biotic factors These are the living features of an ecosystem that affect the other members of the community. 8
Biotic factors include: Plants for food and shelter Predators Prey Parasites and pathogens Decomposers Competitors Pollinators 9
Learning check What is meant by abiotic factors? These are the non-living features of an ecosystem (i.e. the physical and chemical conditions) that affect the community. Give examples Temperature, Light intensity, Air speed Water current, Humidity, pH, Dissolved oxygen, Salinity, Nitrate, Phosphate and other plant nutrients 10
Climatic factors These are elements of the climate (weather) that influence the life and distribution of the organisms that live in a particular environment. 11
Climatic factors include: Temperature Rainfall Humidity Wind Light intensity (including seasonal variations) Day length 12
Learning check What are biotic factors? These are the living features of an ecosystem that affect the other members of the community Give examples of biotic factors. Plants for food and shelter Predators and Prey Parasites and Pathogens Decomposers, Competitors, Pollinators 13
Edaphic factors These are the physical, chemical and biological characteristics of the soil that influence the community. 14
Edaphic factors include: Soil type, Soil pH, Available (soil) water, Air and Mineral content, Humus, Soil texture and Structure. 15
Learning check What are climatic factors? These are elements of the climate (weather) that influence the life and distribution of the organisms that live in a particular environment Give examples Temperature, Rainfall, Humidity Wind, Day length Light intensity (including seasonal variations) 16
Aquatic Environmental Factors The following are also considered as factors: Light penetration Currents Wave action http://upload.wikimedia.org/wikipedia/commons/thumb/7/7c/Nur05018.jpg/300px-Nur05018.jpg 17
Learning check What are edaphic factors? These are the physical, chemical and biological characteristics of the soil that influence the community. Give examples Soil type, Soil pH, Available (soil) water, Air and Mineral content, Humus, Soil texture and Structure 18
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