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Balance Within Ecosystems

Across
The loss of a natural habitat
The study of where organisms live and how they got there
The total number of different species on Earth; including those on land, in the water, and in the air
The first species to populate an area during succession
The breaking of a habitat into smaller, isolated pieces
The trapping of heat near a planet's surface by certain gases in the planet's atmosphere
A species that influences the survival of many other species in an ecosystem
The series of changes that occur in an area where no soil or organisms exist
The series of predictable changes that occur in a community over time
Species that are carried to a new location by people
A species in danger of becoming extinct in the near future
Down
A species that could become endangered in the near future
The series of changes that occur in an area where the ecosystem has been disturbed, but where soil and organisms still exist
The disappearing of all members of a species from Earth
Illegal killing or removal of wildlife from their habitats
The mating of animals in zoos or wildlife preserves
Anything in the environment that you need to live, such as water, nutrients, light, food, or space
The movement of organisms from one place to another