- The spatial arrangement of organisms within a particular area.
- 5-30 million
how many species are thought to be living on earth
close to 2 million
how many species have been identified
- the maximum population size that a given environment can sustain.
bees pollinate approximately what percentage of our crops
- an organism that can use the energy from sunlight to produce its own food.
- an organism that consumes producers and feeds at the second trophic level
- an organism that consumes secondary consumers and feeds at the fourth trophic level.
- an organism that consumes primary consumers and feeds at the third trophic level.
- an organism, such as a millipede or soil insect, that scavenges the waste products or dead bodies of other community members.
- an organism, such as a fungus or bacterium, that breaks down leaf litter and other nonliving matter into simple constituents that can be taken up and used by plants.
- A major regional complex of similar plant communities;
what are the two conditions that influence biomes the most
the study of how the natural world functions and how humans and the environment interact.
- a theory that views environment rather than heredity as the important factor in the development and especially the cultural and intellectual development of an individual or group
- total rate of change in a population's size per unit time.
what was the first national park in the world
- Nature Conservancy, Conservation International, the World Wide Fund for Nature, Greenpeace, and Population Connection
examples of nongovernmental organizations (NGOs)
- a combined effort of government and a for-profit entity, generally intended to use the efficiency of the private sector to help achieve a public policy goal.
- the ability of an ecological community to remain stable in the presence of a disturbance.
- the ability of an ecological community to change in response to disturbance but later return to its original state.
- a stereotypical series of changes in the composition and structure of an ecological community through time.
- the process by which autotrophs produce their own food.
- Energy of motion
- energy of position
triple bottom line
- an approach to sustainability that attempts to meet environmental, economic, and social goals simultaneously.