NOAA confirms fourth global coral bleaching event
The world is currently experiencing a global coral bleaching event, according to NOAA scientists. This is the fourth global event on record and the second in the last 10 years.
The world is currently experiencing a global coral bleaching event, according to NOAA scientists. This is the fourth global event on record and the second in the last 10 years.
Ecology
Apr 20, 2024
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Perth has just had its driest six months on record, while Western Australia sweltered through its hottest summer on record. Those records are remarkable in their own right. But these records are having real consequences.
Environment
Apr 15, 2024
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Coral reefs around the world are experiencing global bleaching for the fourth time, top reef scientists declared Monday, a result of warming ocean waters amid human-caused climate change.
Ecology
Apr 15, 2024
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Parasites thought only to infect tropical coral reefs have been discovered in a large variety of creatures in cold marine ecosystems along the Northeast Pacific, according to new research from University of British Columbia ...
Plants & Animals
Apr 11, 2024
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Some deeper areas of the Great Barrier Reef are insulated from harmful heat waves—but that protection will be lost if global warming continues, according to new research.
Ecology
Apr 8, 2024
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Endangered smalltooth sawfish, marine creatures virtually unchanged for millions of years, are exhibiting erratic spinning behavior and dying in unusual numbers in Florida waters. Federal and state wildlife agencies are beginning ...
Ecology
Mar 28, 2024
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Bleaching can suppress reproduction in a common coral species found in the Great Barrier Reef, hampering future reef replenishment, new research led by the Australian Institute of Marine Science (AIMS) and James Cook University ...
Plants & Animals
Mar 26, 2024
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For the fifth time in just the past eight summers—2016, 2017, 2020, 2022 and now 2024—huge swathes of the Great Barrier Reef are experiencing extreme heat stress that has triggered yet another episode of mass coral bleaching.
Plants & Animals
Mar 11, 2024
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A "mass bleaching event" is unfolding on Australia's famed Great Barrier Reef, authorities said Friday, as warming seas threaten the spectacular home to thousands of marine species.
Ecology
Mar 8, 2024
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Scientists have discovered the gene that enables marine algae to make a unique type of chlorophyll. They successfully implanted this gene in a land plant, paving the way for better crop yields on less land.
Biotechnology
Mar 6, 2024
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Bleach refers to a number of chemicals that remove color, whiten, or disinfect, often via oxidation. Common chemical bleaches include household chlorine bleach (a solution of approximately 3–6% sodium hypochlorite, NaClO), lye, oxygen bleach (which contains either hydrogen peroxide or a peroxide-releasing compound), and bleaching powder (calcium hypochlorite). The bleaching process was known to most ancient civilizations and has been around for thousands of years. Modern bleaches resulted from the work of 18th century scientists including Swedish chemist Carl Wilhelm Scheele, French scientists Claude Berthollet and Antoine Germain Labarraque, and Scottish chemist Charles Tennant. Household chlorine bleach is created in two ways: by separating sodium hypochlorite from sea water or brine using electrolysis, or by adding chlorine gas to sodium hydroxide which produces sodium hypochlorite, water and sodium chloride.
Many bleaches have strong bactericidal properties, and are used for disinfecting and sterilizing.
Examples of peroxide-releasing compounds are sodium perborate, sodium percarbonate, sodium persulfate, tetrasodium pyrophosphate, or urea peroxide together with catalysts and activators, e.g., tetraacetylethylenediamine or sodium nonanoyloxybenzenesulfonate.
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