Ch. 7 Aquatic Ecosystems Review
Because water_____ sunlight, photosynthesis is limited to the upper 100 meters of the ocean
absorbs
what is the source of most ocean pollution?
activities on land
Estuaries
are ecosystems where both fresh water & salt water are present
what are the two main types of freshwater wetlands
marshes and swamps
Free-swimming organisms
nekton
as they flow down a mountain to flatter ground, rivers generally become
slower, warmer, wider
Many rivers originate from ___ in mountains
snow melt
the types of organisms found in the pond or lake depend on
temperature of water, amount of sunlight, presence of nutrients
Coral reefs are intricately shaped rocklike structures that are formed as a result of
the secretion of calcium carbonate by tiny marine animals
Corals live only in shallow, ___ water where there is enough light for photosynthesis
warm
which of the following is NOT characteristics of wetlands?
wetlands are limited to inland freshwater environments
Why doesn't photosynthesis occur in deep ocean water?
There is no sunlight.
Long, thin ____________________ islands typically run parallel to a shore.
barrier
in the____zone, the water is cool and dark
benthic
bottom-dwelling organisms
benthos
marine ecosystem...
coral reef
a_____ lake has a large amount of plant growth due to nutrients
eutrophic
Which of the following is NOT an environmental function of wetlands
increasing runoff
what causes most coastal pollution in the U.S.
industrial waste and sewage
threats to the ocean ecosystem are
nutrient runoff & industrial waste discharges This is a wrong answer, overfishing & entanglement of marine mammals in nets This is a wrong answer, sewage and algal blooms This is a wrong answer
Which organisms produces most of the food in an aquatic ecosystem
phytoplankton
Estuaries are very productive ecosystems because they receive fresh nutrients from
rivers and oceans
Excessive nutrient growth in an aquatic ecosystem can be accelerated by
runoff
the amount of dissolved salts in water.
salinity