Earth is home to millions of different organisms, all of which have specific
survival needs. These organisms rely on their environment, or the place
where they live, for their survival. All plants and animals have relationships
with their environment. They interact with the environment itself, as well as the other
plants and animals within the environment. This interaction creates an ecosystem.
Different organisms have different needs. Not every animal can survive in extreme
climates. Not ail plants require the same amount of water. Earth is composed of
many types of environments, each of which provides organisms with the living
conditions they need to survive. Organisms with similar environmental needs form
communities in areas that meet these needs. These areas are called biomes. A biome
can have several ecosystems.
Wetlands are places where the soil is drenched with water at least part of the year.
Wetlands water can come from nearby lakes, rivers, streams, or oceans. It can also
come from rainfall, snowmelt, or groundwater. Wetlands can contain fresh water
or salt water. This water moves very slowly across the land, or it stands still.
Peat bogs are fragile wetland ecosystems.