rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water
the variety of species living within an ecosystem
the condition in which, at ecosystem boundaries, there is greater species diversity and biological density than there is in the heart of ecological communities.
a species whose numbers are so small that the species is at risk of extinction
organisms that are not native to a particular area
disappearance of a species from all parts of its geographical range
Breakup of a habitat into smaller pieces, usually as a result of human activities.
Threat to biodiversity. The damage to a habitat by pollution.
layer of the stratosphere with a high concentration of ozone; absorbs most of the Sun's harmful ultraviolet radiation
a species that could become endangered in the near future
an organism that is held by people
field of biology that studies methods and implements plans to protect biodiversity
natural strips that allow the migration of organisms from one area to another
materials found in nature that are used by living things
programs that release organisms into an area where their species once lived in hopes of reestablishing naturally reproducing populations
philosophy that promotes letting people use resources in wilderness areas in ways that will not damage the ecosystem