Tag

ecosystems

Cod and climate

In recent decades, the plight of Atlantic cod off the coast of New England has been front-page news. Since the 1980s in particular, the once-seemingly inexhaustible stocks of Gadus morhua– one of the most important fisheries in North America — have declined dramatically. I
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Marine carbon sinking rates confirm importance of polar oceans

About the same amount of atmospheric carbon that goes into creating plants on land goes into the bodies of tiny marine plants known as plankton. When these plants die and sink, bacteria feed on their sinking corpses and return their carbon to the seawater. When plankton sink deep enou
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Distant volcanic eruptions foster saguaro cacti baby booms

One hundred and thirty years ago, the volcano Krakatoa erupted in what is now Indonesia, unleashing a cataclysm locally and years of cool temperatures and rain globally. On the far side of the world, a bumper crop of saguaro cacti were getting their start in life in Arizona’s So
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Rainforest greener during 'dry' season

Although the Amazon Jungle may appear to be perpetually green, a University of Illinois researcher believes there are actually seasonal differences of photosynthesis, with more occurring during the dry season and less during the wet season. Understanding how a rainforest that occupies
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Spiders spin unique phononic material

New discoveries about spider silk could inspire novel materials to manipulate sound and heat in the same way semiconducting circuits manipulate electrons, according to scientists at Rice University, in Europe and in Singapore. A paper in Nature Materials today looks at the microscopic
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Oceans may be large, overlooked source of hydrogen gas

Serpentinized rocks formed near fast-spreading tectonic plates under Earth’s seafloor could be a large and previously overlooked source of free hydrogen gas, a new study finds. The finding could have far-ranging implications since scientists believe hydrogen might be the fuel so
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Trees' surprising role in the boreal water cycle quantified

Approximately 25 to 50 percent of a living tree is made up of water, depending on the species and time of year. The water stored in trees has previously been considered just a minor part of the water cycle, but a new study by University of Alaska Fairbanks scientists shows otherwise.
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Bird ranges vary more than thought

A new study of population trends among 46 ecologically diverse bird species in North America overturns a long-held assumption that the climate conditions occupied by a species do not change over time. Instead, birds that have increased in abundance over the last 30 years now occupy a
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Global Economy Has Reduced Its Energy Intensity by One-Third Since 1990

The global economy is becoming less energy intensive, using fewer fossil fuels to power productivity and economic growth, according to new data from the U.S. Department of Energy. Global energy intensity — a measure of energy consumption per unit of gross domestic product (GDP) — has
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'Perfect storm' brought sea louse epidemic to BC salmon

High ocean temperatures and poor timing of parasite management likely led to an epidemic of sea lice in 2015 throughout salmon farms in British Columbia’s Queen Charlotte Strait, a University of Toronto-led study has found. The sea lice spread to migrating juvenile wild salmon,
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