An ecosystem is a community of living organisms
(plants, animals, microbes) interacting with each other
and with their non-living environment (such as air,
water, soil, and climate) in a specific area.
Key Components of an Ecosystem:
1. Biotic Factors (Living):
o Producers (autotrophs): Usually plants or algae
that make their own food through
photosynthesis.
o Consumers (heterotrophs): Animals that eat
plants or other animals.
o Decomposers: Fungi and bacteria that break
down dead organisms and recycle nutrients.
2. Abiotic Factors (Non-living):
o Sunlight
o Temperature
o Water
o Soil
o Nutrients
o Air
Types of Ecosystems:
Terrestrial Ecosystems: Forests, grasslands, deserts,
tundras.
Aquatic Ecosystems: Freshwater (rivers, lakes) and
marine (oceans, coral reefs) ecosystems.
How Ecosystems Work:
Ecosystems rely on energy flow and nutrient cycling:
Energy comes from the sun, captured by producers
and passed through food chains.
Nutrients cycle between organisms and the
environment, helped by decomposers.
Example:
A forest ecosystem might include:
Trees (producers)
Deer (primary consumers)
Wolves (secondary consumers)
Mushrooms (decomposers)
Rainfall, soil nutrients, and sunlight (abiotic factors)
Why Ecosystems Matter:
They support life on Earth by providing clean air,
water, food, and climate regulation.
Human activities (deforestation, pollution, climate
change) can damage ecosystems, affecting
biodiversity and sustainability.