What do you think will be the major issue facing Australia’s marine life/oceans in the next 100 years?
Posted: June 10th, 2008 under Marine Life.
Comments: 5
Comments
Comment from Bandett
Time: June 11, 2008, 8:36 pm
the star fish that are invading, yu guys have people trying to kill them its so bad.+++++++++.just a note to you– sea life likes water so if it rises, I dont think thats a big problem for them–dont you read books? liberalism is a mental disorder
Comment from josyul026
Time: June 11, 2008, 10:12 pm
By then as the sea level raises the land area is likely to be reduced/
Touring people will reduce for GBR( MAIN TOURIST DESTINATION)
Comment from grovesmuk
Time: June 13, 2008, 12:49 am
Can I just point out that during previous periods of warmer temperatures and higher co2 the GBR was not destroyed (am pretty sure its still there!) and analysis of Porites corals in GBR has shown that calcification increases with warming “the 20th century has witnessed the second highest period of above-average calcification in the past 237 years” [Lough and Barnes 1997]. This is believed to have been due to an enhancement in coral metabolism and/or increases in photosynthetic rates of their symbiotic algae [McNeil et al. 2004]
This biologically driven process accounts for the ability of coral to survive major changes in temperature over the course of millions of years.
Suggesting that acidification of the ocean will kill Coral is merely scare mongering, particularly when c12/c13 isotope analysis shows only 3% of co2 in the atmosphere is man made, with most the suposed increase in recent years being naturally caused by the sea.
Sea level will rise in line with the historic rate over the last 10,000 years (which is little effected by temperature) as the remnants of the ice age continue to recede. This is a similar rate as was observed over the last 100 years (150mm/centuary), so Australia can expect to see a small rise in sea level which will not kill GBR.
The main issues will be the same ones as today, pollution, over fishing etc…
New issues could be people trying poorly thought out quick fix methods to make the sea absorb more co2, like some of the already suggested ideas such as adding lime to the sea (starves fish of oxygen) or adding iron oxide (creates sulphuric acid) or dumping sewage in the ocean to trigger algae blooms, then poisening it.
Comment from BB
Time: June 14, 2008, 2:17 pm
The Crown-of-Thorns Starfish
Comment from Greshnab
Time: June 15, 2008, 7:00 pm
looks to me like a problem is going to be the increased changes in the biosphere as more and more of ausie land is farmed.. the fertilizers tend to wash into the oceans providing nutrient rich environments… what seems a good thing can be bad as it throws off the local eco cycle.
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