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originally posted by: SM2
ok, this is off topic from Antartica, but it is talking to a point brought up by the OP in regard to widespread coral bleaching.
That link Krazsh0t provided to an article about the Great Barrier Reef, is very very misleading. As a marine biologist that is so well regarded he provided tremendously false information. I know this from personal expiernce as I own, and have owned for decades, reef aquariums. I know what symptoms are caused by what, as the monetary investment insures you will really pat attention and do independant research to keep these guys alive.
First off, most coral species, even the more fragile SPS (small polyp stony) corals, such as the Acropora, Millipora and Porcilipora are actually pretty forgiving to temperature changes, provided they happen gradually. Now, if you moved one from one place that was 80 degree to one that was 90 degrees and didnt acclimate the specimen over the course of several hours....it would bleach. Not immediately, but it would. The bleaching effect is when the zooxanthellae, or the algae that lives within the coral, dies off. They are the food source for the coral,giving them energy and giving them their colors. The Zooxanthellae are photosynthetic, and water temperature has very little effect on them in general. As long as the change is gradual.
Contrary to what the biologist claimed, they do not turn brown then get covered by seaweed and then bleach. Turning brown is indicitive of poor water quality. It is what happens when there are too many nutrients in the water. Typically in the form of Nitrates and nitrites. That causes the zooxanthellae to over produce, thus causing the browned out color. The coral will actually grow extemely fast, until they reach balance with the zooxanthellae. In decades of reef husbandry, I have never seen and stony polyp coral bleach due to temperature. Even once when my heater malfunctioned and the water temp went to 90 F for a week. As that change was gradual then maintained at about that level , the corals acclimated to it, and still thrived, now, I love some other livestock, but no corals. Not a single one bleached or lost it's color.
Things that will cause bleaching....
too much light. If you place them too close to the surface, or directly under extremely powerful lighting fixtures, which is referred to as light shock.
Poor water quality...water chemistry that is a) low in magnesium or, b) high in phosphates, nitrites or nitrates (which is due to a broken nitrogen cycle)
Too much ammonia
Now, if it can be identified as either Rapid Tissue Necrosis or Slow Tissue Necrosis thats a different story. RTN and STN is when the coral looses it's tissue and turns white. RTN happens suddenly and usually within 24 hours. STN can take months, depending on the severity and the size of the coral colony. These are both caused (or believed to be caused) by a bacteria infection. Specifically by different strains of Vibrio bacteria. There is a method of curing this infection that works very well for reef aquariums, but would be very inefficient on such a large scale as a wild reef.
www.ncbi.nlm.nih.gov...
So, it would seem that, that particular article and that particular biologist are misleading people intentionally to push a narrative that seems to attract alot of false information and intentionally misleading so called "peer reviewed research".
originally posted by: UKTruth
originally posted by: Krazysh0t
originally posted by: Masterjaden
a reply to: Krazysh0t
Quite important for a 'scientist' to get the words right.
Absolutely correct UK that scientist of all people use the right words and understand how to spell them!edit on 19-5-2017 by Justoneman because: (no reason given)
originally posted by: Justoneman
originally posted by: stosh64
a reply to: Krazysh0t
It should be noted that the current CO2 level in the atmosphere hasn't been seen on this planet since the Pliocene era some 3 million years ago, before humans existed.
So this HAS happened before. WITHOUT humans involved.
Now that humans can make $$$ of of this, it MUST be us evil humans causing it, and your $$$ can fix it.
That has been my whole point since we started this series of discussion.
another important question we should look inside ourselves and ponder:
WHAT IS THE IDEAL EARTH TEMP FOR HUMANS????
I think the actual ideal temperatures is probably way warmer overall than a few more degrees on average. The average temperature of Earth appears to be warmer if Antarctica was green, Alaska's north country had a Tropical rain forest and Greenland was green, honestly. Krazy you mean well on this subject but have to realize the data simply doesn't support the past being hotter than we predict it will be in 100 years.
originally posted by: SM2
which those are a prime food source for many reef dwelling creatures, specificially copepods and mysis. Most smaller reef fish, such as wrasses, surgeonfishes, dragonets and the like feed primarily on those. If the nitrates are high, and the shrimp and copepods move away due to that, then the more invasive (to coral species anyways) move in. Angelfish will simply devour any coral in their path. As do a multitude of starfish. A crown of thorns or chocolate chip star fish will plow right through a reef and leave every coral in it's wake pure white and dead. There are so many possibilities for the bleaching of wild corals that to simply just say hey, the temperature climbed 1 degree , thats the cause is simply lazy and agenda driven.
Hypoxic zones or “dead zones” are caused by high levels of nutrients, primarily from activities such as industrialized agriculture and inadequate wastewater treatment.
The Great Barrier Reef receives the run-off from 35 basins which drain 424,000km2 of coastal Queensland. River discharges are the single biggest source of nutrients to the inshore areas of the Great Barrier Reef World Heritage Area. Over the past 150 years sediment inflow into the Great Barrier Reef has increased four to five times, and five to ten fold for some catchments.
originally posted by: Krazysh0t
No you have been questioning science since your first post in the thread. Don't pretend otherwise.
originally posted by: D8Tee
Paris Climate Agreement is a bad deal for America.
originally posted by: Krazysh0t
a reply to: Wide-Eyes
Yet one of the biggest issues of the day is the US trying to leave the Paris Climate Agreement that literally 99% of the world has signed onto.
originally posted by: HeliocentricFantasy
a reply to: Krazysh0t
It should be noted that the current CO2 level in the atmosphere hasn't been seen on this planet since the Pliocene era some 3 million years ago, before humans existed. People need to wake up. We are DEFINITELY breaking the planet's natural cycles and the results are starting to show.
Definitely huh? So who caused the rise in CO2 levels in the Pliocene era? Who caused the natural cycles you speak of in the first place?
originally posted by: AutonomousMeatPuppet
Tourists wearing sunscreen are a major cause of bleaching.
Oxybenzone is lethal in pats per trillion to coral, and thousands of tons end up in reefs annually.
www.npr.org... ions/thetwo-way/2015/10/20/450276158/chemicals-in-sunscreen-are-harming-coral-reefs-says-new-study
Another claim is that increased carbon dioxide in the water kills coral. Yet there was recently a reef found in the confluence of the Amazon River. It could not be seen due to the massive amount of organic material in the water, which breaks down into a large amount of CO2.
originally posted by: buddah6
Has anyone ever looked at the NASA pictures comparing Arctic and Antarctica ice pack receding? I noticed that pictures of the Arctic were taken in August showing clearly a lack of ice. The next picture was of the Antarctica in December which also clearly showed the ice pack receding. The statement was made how critical MMGW was.
Would someone explain this to me. What am I supposed to see in these pictures?
originally posted by: Krazysh0t
a reply to: eXia7
I haven't seen you offer a single valid point in this thread. All I've seen you do is go on about Al Gore who has nothing to do with proving if Climate Change is real or not. He's just a spokesman.
I don't know how it works in the company YOU work for, but our salespeople/spokesmen don't develop our products in my company. So attacking Al Gore like he is the primary source for Climate Change information is intellectually dishonest.