Moreton Bay Australia Flashcards
Moreton bay is location of major catchments so sediment supply is ____
seasonal and variable
Major sediments of the bay are derived from
riverine and tidal deltas
Water circulation in the bay is driven by _____ and circulates in a ______ fashion
tides| clockwise
describe the diversity of they bay
very diverse with number of endemic species
Through time mangrove density _____ and seagrass density ____
increased| decreased
Describe the deal with the south passageway between Moreton and Straddie islands
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
Whats the deal with the entrance to Brisbane river going into moreton bay
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
Land degredation around the bay?
- channel estates made messing up flow and bringin in organims- dredging of the mouth of brisbane river
How does the condition of Moreton bay differ now than from the past
in the past it was deeper and more marinenow its really shallow and sedimentary with lots of coral reefs-sand islands
The waters of the bay are ______ and pretty shallow
oligotrophic
The “dirty water” of the bay resides on the ___ and the clean water comes in from the ___ where water flows in
West| East
What is the tidal delta?
Where high velocity water brings in and deposits sediments
Describe the climate of the bay
mostly tropical / boardering temperate
What crab is endemic to moreton bay?
grey-fiddler crab
Deltas keep water from flowing into the _____ and that is why they “dredged” it
Brisbane river
What is the behavioural tendancies of the birds of the bay in reference to direction
Birds reproduce in the north and then chill in the south
What results from the combination of high tides and drought in the brisbane river?
deep penetration of salt water which means lots of marine organims, mainly bull sharks come through
T/F: Moreton bay is a significant place for commercial fisheries
True
What is one way fisheries have used to catch fish as an alternative to trawling
tunnel netting
Commercial fisheries and the abundant fish in the bay have brought on dolphins and whales which lead to a increase in ___
toursim
