Moreton Bay Australia Flashcards

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1
Q

Moreton bay is location of major catchments so sediment supply is ____

A

seasonal and variable

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2
Q

Major sediments of the bay are derived from

A

riverine and tidal deltas

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3
Q

Water circulation in the bay is driven by _____ and circulates in a ______ fashion

A

tides| clockwise

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4
Q

describe the diversity of they bay

A

very diverse with number of endemic species

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5
Q

Through time mangrove density _____ and seagrass density ____

A

increased| decreased

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6
Q

Describe the deal with the south passageway between Moreton and Straddie islands

A

A channel of passage but the shallow water and SAND BARS would cause high breaking waves so they built a rock wall to block the current flow and now pump the sand over to make up for the intervening of long shore drifting

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7
Q

Whats the deal with the entrance to Brisbane river going into moreton bay

A

It used to be covered by mangroves and seagrass so much that you only found the entrance if someone else who new showed it to you. It was a big filtering station but now its all cleared out and dredged so now the system is all messed up and readapting

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8
Q

Land degredation around the bay?

A
  • channel estates made messing up flow and bringin in organims- dredging of the mouth of brisbane river
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9
Q

How does the condition of Moreton bay differ now than from the past

A

in the past it was deeper and more marinenow its really shallow and sedimentary with lots of coral reefs-sand islands

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10
Q

The waters of the bay are ______ and pretty shallow

A

oligotrophic

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11
Q

The “dirty water” of the bay resides on the ___ and the clean water comes in from the ___ where water flows in

A

West| East

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12
Q

What is the tidal delta?

A

Where high velocity water brings in and deposits sediments

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13
Q

Describe the climate of the bay

A

mostly tropical / boardering temperate

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14
Q

What crab is endemic to moreton bay?

A

grey-fiddler crab

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15
Q

Deltas keep water from flowing into the _____ and that is why they “dredged” it

A

Brisbane river

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16
Q

What is the behavioural tendancies of the birds of the bay in reference to direction

A

Birds reproduce in the north and then chill in the south

17
Q

What results from the combination of high tides and drought in the brisbane river?

A

deep penetration of salt water which means lots of marine organims, mainly bull sharks come through

18
Q

T/F: Moreton bay is a significant place for commercial fisheries

A

True

19
Q

What is one way fisheries have used to catch fish as an alternative to trawling

A

tunnel netting

20
Q

Commercial fisheries and the abundant fish in the bay have brought on dolphins and whales which lead to a increase in ___

A

toursim