Home » Posts tagged 'coral'

Tag Archives: coral

Olduvai
Click on image to purchase

Olduvai III: Catacylsm
Click on image to purchase

Post categories

Post Archives by Category

Islands Not sinking: Climate Change Demonstrated to Be a Hoax

Islands Not sinking: Climate Change Demonstrated to Be a Hoax

Have you ever wondered how it is possible that coral islands lie flat just a little above the sea level? It is not a coincidence, the coral reef that forms the islands is alive and it can adapt to variations of the sea level. According to some people, that demonstrates that climate change is a hoax (??).

Do you remember when there was a “debate” about climate change? Yes, there was such a thing. Someone would set up a panel where there would be a scientist arguing for the current interpretation of anthropogenic global warming and someone who at least pretended to be a scientist who would argue for the opposite interpretation. It was supposed to be a civil debate, all based on science.

I don’t have to tell you that such debates have disappeared, you don’t see them anymore just as you don’t see quiet and civilized debates between Trump supporters and members of the Antifa movement. In recent times, the closest thing to a public debate on climate was the proposal by Scott Pruitt, EPA’s chief, of a “Red Team” and a “Blue Team” of scientists who should discuss climate matters. The fact that Pruitt chose terms commonly used in military exercises says a lot about what kind of “debate” this was supposed to be. Perhaps it is a good thing that the idea seems to have died out.

Today, we have no debate anymore. We only have two sides shooting slogans against each other. Each side is ready to exploit every perceived weakness in the other to discharge a volley of posts and tweets aimed at gaining a few political points. A snowstorm demonstrates that AGW doesn’t exist while a hurricane that we are all going to die soon. The latest example of this attitude is the news arriving from the Tuvalu Islands.
…click on the above link to read the rest of the article…

The Oceans Are Becoming Too Hot for Coral, and Sooner than We Expected

The Oceans Are Becoming Too Hot for Coral, and Sooner than We Expected

Soon the oceans will be too warm to support thriving coral reefs. USFWS – Pacific Region/FlickrCC BY

This week, scientists registered their concern that super-warm conditions are building to a point where corals are severely threatened across the tropical Indian, Pacific and Atlantic oceans. They did so after seeing corals lose colour across the three major ocean basins – a sign of a truly momentous global change.

This is only the third global bleaching event in recorded history.

Underwater heat waves

The situation has been worrying scientists like myself for many months. Over the past 12 months, the temperatures of the upper layers of the ocean have been running unseasonably warm. Underwater heatwaves have torn through these tropical regions over summer, and corals across large areas of reef have lost their colour as the algal partners (or symbionts) that provide much of the food for corals have left their tissues. Bereft, corals are beginning to starve, get diseased and die.

The “heatwaves” that are causing the problem are characterised by extremes that are 1-3 degrees C warmer than the long-term average for summer. It doesn’t seem like much but past experience has shown us that exposure to small increases in temperatures for a couple of months is enough to kill corals in great numbers.

In the first global mass bleaching event in 1998, regions such as Okinawa, Palau and north-west Australia lost up to 90% of their corals as temperatures soared.

By the end of 1998 up to 16% of the corals on the world’s tropical reefs had died.

The key concern here is that corals are not an inconsequential part of the biology of the ocean. While geographically insignificant (less than 0.1% of the ocean), coral reefs punch well above their weight in terms of their importance to the ecology of the ocean and to humans.

…click on the above link to read the rest of the article…

As Ocean Waters Heat Up, A Quest to Create ‘Super Corals’

As Ocean Waters Heat Up, A Quest to Create ‘Super Corals’

With the world’s coral reefs increasingly threatened by warmer and more acidic seas, scientists are selectively breeding corals to create species with the best chance to survive in the coming century and beyond. Are genetically modified corals next?


In Hawaii this summer, as corals engage in their once-a-year courtship ritual of releasing sperm and eggs into the water by moonlight, Ruth Gates will oversee a unique mating: the coming together of “super-corals” in her lab.

Gates and her team at the Institute of Marine Biology in Kaneohe tagged corals in their local waters that thrived through a heinous hot spell last September. A few of those rugged specimens will be picked for arranged marriages this month, hopefully yielding some offspring even better suited

Van Oppen

Australian Institute of Marine Science
Researcher Madeleine van Oppen collects coral fragments for her breeding project.

to thriving in the warmer waters of the future. It will be, she thinks, the first selective mating of corals to try to help them thrive in the face of climate change.

Gates and her colleague, Madeleine van Oppen at the Australian Institute of Marine Science, have been awarded $3.9 million from Paul G. Allen’s philanthropic organization Vulcan Inc. for this and other work into the “assisted evolution” of corals — an attempt to intentionally beef up the genetic stock of reefs to survive the onslaught of climate change. “This idea of homing in on super-performers is a no-brainer,” says Gates. “We have been doing it in the food supply for millennia.”

The work can be tricky — corals don’t like to be touched when breeding. And it’s controversial — some find the idea of active intervention in coral ecosystems disconcerting, since it turns a natural environment into a planned one that might be less biodiverse and less resilient to unexpected challenges like disease. The idea of tinkering with coral genetics is even touchier, even if current work focuses on simple selective breeding for the hardiest corals, rather than on the more controversial prospect of producing corals that have been genetically modified. 

Olduvai IV: Courage
Click on image to read excerpts

Olduvai II: Exodus
Click on image to purchase

Click on image to purchase @ FriesenPress