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Savanna
A tropical grassland biome with scattered individual trees, large herbivores, and three distinct seasons
Desert
a biome characterized by low moisture levels and infrequent and unpredictable precipitation.
Tundra
Biome characterized as a frozen desert where permafrost exists.
Biotic
Describes living factors in the environment.
Deciduous
Trees and shrubs that shed their leaves at the end of the growing season
Evergreen
a tree that does not lose its leaves in the winter, and stays green all year round
Climate
weather conditions over a long period of time
Biodiversity
The number of different species in an area
Climax community
a stable community that no longer goes through major ecological changes
Ecological succession
series of gradual changes that occur in a community following a disturbance
Limiting factor
factor that causes the growth of a population to decrease
Microhabitat
A very small specialized habitat, such as the space under a rock.
Niche
An organism's particular role in an ecosystem, or how it makes its living.
Pioneer species
The first species to populate an area
Primary succession
succession that occurs on surfaces where no soil exists
Secondary succession
succession that occurs on surfaces where soil exists
Sustainability
The ability to keep in existence or maintain. A sustainable ecosystem is one that can be maintained
Abiotic factors
Non-living things
Biome
A group of ecosystems with similar climates and organisms
Biotic Factors
living or once living things
Ecosystem
A community of organisms and their abiotic environment
Population
group of individuals of the same species that live in the same area
Species
A group of similar organisms that can breed and produce fertile offspring.
Tropical Rainforest
biome near the equator with warm climate wet weather and abundant plant growth
Grassland
A biome where grasses are the main plant life
Marine
aquatic biome in the salt water of the ocean
Freshwater
Aquatic biomes that include lakes, streams, rivers and ponds.
Temperate Deciduous Forest
A biome characterized by trees that shed their leaves in the fall. Vegetation changes with the seasons because of the temperature.
Taiga
biome with long cold winters and a few months of warm weather; dominated by coniferous evergreens; also called boreal forest
Community
All the different populations that live together in an area
Keystone Species
a species that has an unusually large effect on its ecosystem
Note 
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