What is an Ecosystem? Grade 4 Unit 3 Lesson One. What Is An Ecosystem Ecosystem: Defined area in...
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Transcript of What is an Ecosystem? Grade 4 Unit 3 Lesson One. What Is An Ecosystem Ecosystem: Defined area in...
What is an Ecosystem?
Grade 4 Unit 3 Lesson One
What Is An Ecosystem
Ecosystem: Defined area in which a community lives with interactions taking place among the organisms between the community and its non-living physical environment.
An ecosystem is formed by the interactions between all living and non-living things
Types of Ecosystem
Natural
Forest
Grassland
Aquatic
Desert
Artificial
Terres-
trial
Micro-
bialAqua
tic
Components of an Ecosystem
ABIOTIC COMPONENTS BIOTIC COMPONENTS
Sunlight Primary producers
Temperature Herbivores
Precipitation Carnivores
Water or moisture Omnivores
Soil or water chemistry (e.g., P, NH4+) Detritivores
etc. etc.
All of these vary over space/time
Abiotic components:• ABIOTIC components ( Physical and Chemical)• Physical: Solar energy provides practically all
the energy for ecosystems.• Chemical:• Inorganic substances, e.g., sulfur, boron, tend to
cycle through ecosystems.• Organic compounds, such as proteins,
carbohydrates, lipids, and other complex molecules, form a link between biotic and abiotic components of the system.
BIOTIC components• The biotic components of an ecoLiving
members in an ecosystem• system can be classified according to their mode
of energy acquisition.• In this type of classification, there are:• Autotrophic and Heterotrophic• Organisms that produce their own food from an
energy source, such as the sun, and inorganic compounds (eg., Green plants, algae, bacteria)
• Organisms that consume other organisms as a food source.
Forest Ecosystem
• High rainfall
•Large number of organism and flora
• Highly diverse population
• Stability of ecosystem is very sensitive
Types of Forest
• Tropical evergreen forest• Tropical deciduous forest• Temperate evergreen forest• Temperate deciduous forest • Taiga
Features of Forest Ecosystem
• Forest canopy
• Forest floor
• Forest soil
Funtion of forest ecosystem
• Watershed Protection• Atmospheric regulation• Soil Erosion Control• Wind Erosion Control
Desert Ecosystem• High temperature, intense sunlight and low water
• Flora and fauna are very poorly developed and scarce
• Organisms are xeric adaptive
• Scarely populated
Types of desert
• Sand desert• Stony desert• Rock desert• Plateau desert• Mountain desert• Cold desert
Sand desert
Rock desert
Stony desert
Plateau desert
Mountain desert
Cold desert
Features of desert ecosystem
• Rainfall• Temperature • Soil• light• Plants and animals are adapted to live in
extremities
Funtion of desert ecosystem
• Solar energy resource• Mineral resource
Grassland Ecosystem
• Marginal rainfall• Vegetation is
dominated by grasses
• Unimproved wild-plant communities
• Densely populated
Types of Grassland Ecosystem
• Tropical grassland• Temperate grassland• Others
Function of grassland ecosystem
• Grassland provide food• Grasslands Are Breeding Areas• Human habitat
Aquatic Ecosystem
• Low temperature and sunlight• Soil and vegitation is submerged• Flora and fauna had adapted• Densely populated.
Types of Aquatic ecosystem
• Ocean• Lotic• Lentic• Wetland
Features of aquatic ecosystem
• Light and temperature• Current• Chemistry• Competitive organism
Funtion of Aquatic Ecosystem
• Recycles nutrients• Purify water• Resposible for proper rainfall• Attenuate floods• Recharge ground water