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Section 4.4 Aquatic Ecosystems

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What are the four abiotic factors used to classify aquatic ecosystems?depth, flow, temperature, water chemistry
Streams and rivers are examples of _________ ecosystems.flowing-water ecosystems
Lakes and ponds are examples of ______ ecosystems.standing-water ecosystems
Give two examples of standing-water ecosystems.Lakes and ponds
Give two examples of flowing-water ecosystems.Streams and rivers
Where water flows quickly, there is a lot of dissolved _______ but little ____.oxygen, plant life
_____ are free-floating organisms that live in both fresh and saltwater (usually unicellular).Plankton, Audio
Plankton that are autotrophs (producers) are called ____ and they form the base of most aquatic food chains.phytoplankton, Audio
Plankton that are heterotrophs (consumers) are called _____.zooplankton, Audio
An ecosystem in which water either covers the soil or is present at or near the surface of the soil for at least part of the year is called a(n) ______.wetland
_________ are formed where a river meets the sea.Estuaries
______ water is a mixture of fresh and saltwater.Brackish
________ is partially decomposed organic matter. It washes into estuaries to form the base of the estuary food chain.Detritus
_______ are estuaries that are dominated by grasses.Salt marshes
________ swamps are coastal areas dominated by salt-tolerant trees with big roots that trap sediments and prevent erosionMangrove,
What type of coastal ecosystem is shown below?, A mangrove swamp. Notice the huge root system coming off the mangrove trees.,
The _______ zone is the layer of the ocean that light penetratesphotic
The _______ zone is the layer of the ocean that light cannot penetrate.aphotic (pronounced "A-fotic")
No autotrophs can grow in the aphotic zone because without light, _________ is impossible.photosynthesis
The part of the ocean that lies beyond the continental shelf is called the ocean
_______ is the zone between the low tide mark and the edge of the continental shelf.The coastal ocean
What type of coastal ecosystem is this seal swimming around in?, kelp forest,
What type of coastal ecosystem is pictured below?, Coral reef,
The _______ zone refers to the sea floor.benthic
Organisms that live on, in, or attached to the sea floor are referred to as _____.benthos

Truman High School

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