Terms

Aerosols: Aerosols are small particles present in the air/atmosphere (eg. dust, salt, CFC’s)

Ametabolic states: When an organism shuts down its life processes such as eating and respiring in the absence of a crucial resource (such as water or warmth).

Austral summer: Summer in the Southern Hemisphere, occurring during the months of December through February.

Biogeochemical cycling: The cycling of elements through ecosystems mediated by life processes.

Biomass: The amount of living material in a given pool or individual organism.

Chloroflourocarbons (CFC’s): Chemicals produced by humans originally for use in refrigerants and propellants, initially thought to be safe but later found to cause destruction of the ozone layer in the stratosphere.

Organic Matter: Material from living tissue in some stage of decomposition.

Sediments: The “soil” material found at the bottom of lakes, streams, and other wetlands.

Stratosphere: Layer of the atmosphere above the troposphere that increases in temperature with height.

Troposphere: The lowest layer of the atmosphere. The troposphere mixes easily/quickly with weather systems. In contrast to the stratosphere, temperature decreases with height.

*The definitions for these terms are primarily extracted from Schlesinger, 1997 and Chapin et al., 2002.

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