Estuaries and Tropical Foodwebs Flashcards

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1
Q

Define an Estuary (mix of general AND aussie terms)

A

partially enclosed coastal body of water periodically/permanantly open to the sea that has times measurable variable salinity due to the mix of land drainage and sea water

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2
Q

Describe some attributes of estuaries

A
  • sheltered and shallow
  • accumulate sediments
  • variable salinity
  • high turbidity
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3
Q

T/F: Estuaries are dynamic

A

True

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4
Q

How strong are waves that come into estuaries?

A

not that strong

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5
Q

How is the diversity of estuaries?

A

very poor

-rought changing conditions

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6
Q

What are euryhaline species?

A

animals able to survive estuarine conditions for a long time

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7
Q

What things does sediment composition influence in estuaries

A

chemical interactions

affects on living organisms, including burrowing animals and bioturbidity

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8
Q

What does bioturbidity do for the estuary?

A

increased the oxygenation of the sediment (the Redox Discontinuity Layer)

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9
Q

What is the Redox Discontinuity Layer? (RDL)

A

the anoxic layer of the sediment (in estuaries)

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10
Q

Grazing pathways are for coasts and reefs whereas ___ pathway is for estuaries and the deep ocean

A

Detrital

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11
Q

Describe the detrital food web

A

1) bacteria & fungi break down complex cmpds
2) protists feed on the bacteria/fungi
3) detrivores take the detritus and returnn it via feces

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12
Q

How is protists feeding on bacteria/fungi like graze feeding?

A

it keeps the populations small so they can grow back faster and break down more detritus

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13
Q

List the trophic groups of the estuaries

A

Suspension Feeders
Deposit Feeders
Predators

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14
Q

How do suspension feeders eat and their significance

A

filter feeding

*take suspended sediment and deposit it on the ground

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15
Q

How do deposit feeders eat-

A

feeders that swallow and filter sediement

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