MICROORGANISMS IN MARINE AND FRESHWATER
ECOSYSTEMS
ocean acidification - Answers- The decline in pH in ocean waters as a result of changes
to the carbonate equilibrium system.
Eutrophic - Answers- nutrient rich
harmful algal bloom (HAB) - Answers- In aquatic ecosystems, the growth of a single
population of phototroph, either a protist (e.g., diatom, dinoflagellate) or a
cyanobacterium, that produces a toxin poisonous to other organisms, sometimes
including humans. Alternatively, in the absence of toxin production, the concentration of
bloom microbe reaches levels that are inherently harmful to other organisms, such as
filter-feeding bivalves.
Why are some HABs called red tides? - Answers- because the microbial density is so
great that the water becomes red or pink, the color of the algae
photic zone - Answers- The illuminated area of an aquatic habitat from the surface to
the depth to which the rate of photosynthesis equals that of respiration.
Nutrient levels are extremely ______ in the open ocean - Answers- Low
aerobic anoxygenic phototrophy (AAnP) - Answers- Phototrophic process by which
electron donors such as organic matter or sulfide are used under aerobic conditions.
Virioplankton - Answers- Viruses that occur in waters; high levels are found in marine
and freshwater environments.
Temperature, pH, light penetration, nitrogen and especially dissolved ______________
are important physical factors in nearly all aquatic habitats. - Answers- oxygen
anthropogenically-produced atmospheric CO2 has led to ___________ - Answers-
ocean acidification
the autotrophs in an ecosystem are considered to be ___________ consumer because
they provide organic matter - Answers- primary
dissolved carbon dioxide is responsible for the _____________ of unbuffered distilled
water. - Answers- pH
In the carbonated __________ system, the pH of oceans is determined by the relative
concentrations of bicarbonate and carbonate - Answers- equilibrium
ECOSYSTEMS
ocean acidification - Answers- The decline in pH in ocean waters as a result of changes
to the carbonate equilibrium system.
Eutrophic - Answers- nutrient rich
harmful algal bloom (HAB) - Answers- In aquatic ecosystems, the growth of a single
population of phototroph, either a protist (e.g., diatom, dinoflagellate) or a
cyanobacterium, that produces a toxin poisonous to other organisms, sometimes
including humans. Alternatively, in the absence of toxin production, the concentration of
bloom microbe reaches levels that are inherently harmful to other organisms, such as
filter-feeding bivalves.
Why are some HABs called red tides? - Answers- because the microbial density is so
great that the water becomes red or pink, the color of the algae
photic zone - Answers- The illuminated area of an aquatic habitat from the surface to
the depth to which the rate of photosynthesis equals that of respiration.
Nutrient levels are extremely ______ in the open ocean - Answers- Low
aerobic anoxygenic phototrophy (AAnP) - Answers- Phototrophic process by which
electron donors such as organic matter or sulfide are used under aerobic conditions.
Virioplankton - Answers- Viruses that occur in waters; high levels are found in marine
and freshwater environments.
Temperature, pH, light penetration, nitrogen and especially dissolved ______________
are important physical factors in nearly all aquatic habitats. - Answers- oxygen
anthropogenically-produced atmospheric CO2 has led to ___________ - Answers-
ocean acidification
the autotrophs in an ecosystem are considered to be ___________ consumer because
they provide organic matter - Answers- primary
dissolved carbon dioxide is responsible for the _____________ of unbuffered distilled
water. - Answers- pH
In the carbonated __________ system, the pH of oceans is determined by the relative
concentrations of bicarbonate and carbonate - Answers- equilibrium
