test chp 7 guide by laz
ocean
An arctic ecosystem depends almost entirely on---------- for uts available food
the mixing action of river water and ocean water
An estuary functions are as a mineral trap due to
Bentos
Barnacles are type of-------- ,or bottom-dwelling, organism
slowly
Downstream, a river often widens and flows more -----------------.
Runoff
Excessive nutrient growth in an aquatic ecosystem can be accelerated by------------------
Benthos
Fish are a type of-----------or free-swimming, organisms
snow met
Many rivers originate from -----------in mountains
Salinity
The amount of dissolved salts in water in known as--------------
amount of nutrient and sunlight that are available
The arrangement of organisms in the open ocean is determined by the
shallow, coastal waters
The majority of marine organisms are found in
wider, warmer, and slower ( all of the above)
as they flow down a mountain to flatter ground rivers generally become
the secretion of calcium carbonate by tiny marine animals
coral reefs are intricately shaped rocklike structures that are formed as a result of
Barries
long thin--------island typically run parallel to ashore
Rhizoids
mosses use--------------to anchor themselves to rocks near churning river headwater
Land
most ocean pollution can be traced to activities on -------------
Phytoplankton
most of the food in aquatic ecosystems is produced by---------------
brackish
the water in salt marshes in salties than the water in ---------- marshes
phytoplankton and zooplankton
two types of plankton are microscopic plant called----------------- and microscopic animals called-----------------
quickly
upstream, a river is usually cold and flows ----------through a shallow riverbed
river and streams
what are the two mains type of freshwater wetland
River generally move faster and their oxygen level decrease as they near the ocean
which of the following statements is not correct
littoral
The type of organisms found in a pond or lake depend on
Nekon
Three groups of aquatic organisms include plankton,-----------and benthos
all of the above
Two threats to ocean ecosystems are
increase runoff
Which of the following is not an environmental function of wetland
phytophankton
Which organism produces most of the food in an aquatic ecosystem
There are not enough sunlight
Why doesn't photosynthesis occur in deep ocean water
absorb
because water ------------ sunlight, photosynthesis is limited to the upper 100 meters of the ocean
warm
coral live only in shallow ------------- water where there is enough light for photosynthesis
limestone
coral polyps secrete skeletons of ----------- that slowly accumulate and form coral reefs
rivers and oceans
estuaries are very productive ecosystems because they receive fresh nutrients from