What Is An Ecosystem?
A small patch of farmland, an underside of a large rock, and a stream flowing through a pasture represent what?
An ecosystem
Why is Glacier Bay an example of how ecosystems change over time?
Because some of the land was exposed by glaciers, which means the land had few nutrients. Therefore, it has more time to undergo succession.
A measure of how many different species live in an ecosystem is___
Biodiversity
The variety of organisms in an area
Biodiversity
A ___ is a large region characterized by a climate and its specific plant and animal communities
Biome
The place where a population of a species lives
Habitat
An ecosystem is defined by what?
It's community and physical aspects of the area
What factors are needed to make up an ecosystem?
Microscopic organisms, weather conditions, and large mammals
The replacement of one kind of community by another at a single place over time
Succession
What is meant by the term "pioneer species"?
A small, fast-growing plant that is the first to live in a habitat
You expect to find the most biodiversity in ___
A square yard of forest floor
The different species that live in a habitat
Community
A typical organism that might occupy a forest in the southeastern United States is a ___
Deer
Community and all of the physical aspects of its habitat
Ecosystem
What is the primary difference between a freshwater ecosystem and a marine ecosystem?
The amount of salt in the water
An example of biotic factor in an ecosystem is
The number of competing species
How are the organisms in both saltwater and freshwater similar?
They're both aquatic. Organisms will evolve to fit into each ecosystem
