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the amount of salt in a sample of water


water that has less than 0.5% of dissolved salts


brackish water

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

photic zone

the benthic zone is defined as

the floor of a body of water

only found in deep bodies of water

aphotic zone

freshwater ecosystems are divided into flowing-water and

standing water

standing water biomes have water movement

in cycles

the level in pond or lake that contains plankton

photic zone

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


wetlands also

refill aquifers

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

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