Ch391 Human Ecology

1
Ch39-1 Human Ecology

• The size of a population that an environment can
  support without damage is called its
• What problem may arise when foreign organisms are
  imported into an environment that has never had
  them before?
• When large amounts of nutrient a placed in an
  aquatic biome, it speeds up the growth of algae.
  What is it called, and why can this be a problem,
  and? P.868
• List 2 major types of water pollution.
• Non-biodegradable substances such as mercury may
  exist in the environment in non-toxic
  concentration and are absorbed by producers which
  are eaten by 1st order consumers which
  concentrate the toxic material by keeping it
  while using the rest as food. 2nd order consumers
  do the same until farther up the food chain the
  substance is concentrated enough to be toxic and
  cause problems. This is called
• What is the difference between renewable and
  non-renewable resources?

Carrying capacity
The foreign organisms population explodes and
outcompetes the natives driving them to
extinction.
Eutrophication. When the algae dies it
decomposes and uses all the oxygen.
Bacterial, thermal, eutrophication, toxic spills
and dumping, sewage, radioactive wastes.
Biological Magnification
Renewable can be continually grown fast enough
to replace our use