Define:
An ecosystem
It is the collection of biotic and abiotic factors in an area.
Biotic factors include living things like plants, animalsand bacteria. Abiotic factors include non-living things like soil, water and sunlight.
List:
The three main categories of factors in an ecosystem.
Autotrophs make their own food, heterotrophs consume other organisms for food and non-living matter includes all abiotic factors.
List:
The two main types of ecosystems.
Terrestrial ecosystems exist on land, while aquatic ecosystems occur in water.
Define:
biomes
Large collections of ecosystems defined by their distinctive precipitation, temperature, vegetation and wildlife.
Describe:
taiga
The largest terrestrial biome, characterized by coniferous forests and has long, cold winters.
Describe:
tundra
A type of biome characterized by small grasses, shrubs and small mammals.
It does not support trees due to harsh and cold weather.
Describe:
deciduous forest
Ecosystem featuring forests of broad-leaved trees and diverse animal species. They experience four seasons and sustain a rich variety of life.
Also called temperate deciduous forest or broadleaf forest.
Define:
temperate grassland
Ecosystem with grass as dominant vegetation, grazing animals, four seasons and rich soil.
Savannas, distinct from temperate grasslands, are warm grasslands in Africa with two main seasons: wet and dry.
List:
The three main types of aquatic ecosystems.
Freshwater ecosystems have low salt concentrations, marine ecosystems are located in the ocean, and brackish ecosystems occur where saltwater and freshwater meet.
Identify:
An example of a freshwater ecosystem.
Pond
Freshwater ecosystems include ponds, lakes, rivers and streams.
Identify:
An example of a marine ecosystem.
Coral reef
Also called the tropical rainforests of the ocean.
Marine ecosystems are present in the ocean.
Identify:
An example of brackish water ecosystem.
Mangrove
Brackish water ecosystems occur where saltwater and freshwater meet.
Identify:
An example of a closed ecosystem.
Terrarium
Closed ecosystems do not exchange matter and energy with other environments.
Explain:
What does a food chain represent?
Feeding interactions in an ecosystem, showing who eats whom.
Identify:
Who forms the base of the food chain?
Producers or autotrophs.
Define:
A trophic level
The category of feeding that the organism occupies with relation to the food being produced.
List:
The five trophic levels.
Define:
autotrophs
Organisms that create or produce their own food through photosynthesis or chemosynthesis.
Define:
primary consumers
Organisms that feed on producers, typically herbivores.
Define:
secondary consumers
Organisms that feed on primary consumers and can be either carnivores or omnivores.
This trophic level is where predators start to appear.
Define:
tertiary consumer
Organisms that feed on secondary consumers.
They are typically predators.
Define:
quaternary consumers
Apex predators that feed on tertiary consumers and below.
They are at the top of the food chain with few predators.
Define:
herbivores
Organisms that feed exclusively on plant matter.
Define:
carnivores
Organisms that feed exclusively on meat or other animals.