the amount of salt in a sample of water
water that has less than 0.5% of dissolved salts
more salty than freshwater, less salty than ocean water
two examples of hypersaline biomes
great salt lake, mono lake
the top layer of an aquatic biome
the benthic zone is defined as
the floor of a body of water
only found in deep bodies of water
freshwater ecosystems are divided into flowing-water and
standing water biomes have water movement
the level in pond or lake that contains plankton
aquatic herbivores or consumers
aquatic scavengers are found in
the benthic zone
wetlands are found
where water and land meet
birds use wetlands for
breeding, feeding, and resting areas
wetlands also protect land from
the everglades are special wetlands found in
four species found in the everglades are
alligators, ibis, key deer, soft-shelled turtle
flowing-water ecosystems all have this in common
move over lands
flowing-water ecosystems found above ground
underground flowing-water ecosystems are
where do streams begin?
starts in high altitude often from runoff of melting snow on the top of mountains
where does the water come from?
it runs off from melting snow on top of mountains
what causes the water to move downhill?
the beginning of a stream is called what?
orgin or head
describe what the water is like in a mountain stream.
can support a variety of organisms because it's cold and have oxygen
what is sediment?
small particles that settle to the bottom of a body of water.
why is sediment important in a stream?
provides a place for plants to grow
what type of food chain organism is helped by sediment?
what is sedimentation and how does it affect flowing-water ecosystems?
when rivers slow down the sediment starts to build, it starts to speed up
give an actual example of a river that has changed due to sedimentation and erosion.
the nile delta