Chapter 4.5 Changes In Ecosystems. Flashcards
The complete clearing of a forest by felling and burning the trees.
Slash-&-Burn.
The removal of all trees in an area.
Clear-Cutting.
The harvesting of only certain trees from an area.
Selective Cutting.
A controlled fire set intentionally in a designated area.
Prescribed Burn.
Having low nutrient levels.
Oligotrophic.
Having high nutrients.
Eutrophic.
A type of bacteria that occurs naturally in the intestine of humans and other animals, and indicates the presence of fecal contamination in water.
Coliform Bacteria.
The amount of dissolved oxygen needed by decomposes to completely break down the organic matter in a water sample at 20 degrees C over five days.
Biological Oxygen Demand (BOD).
The land that drains toward a lake or other body of water.
Watershed.
