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Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
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Easy Ways to Conserve Water
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Ministry of Education Announces 82 GSAT Scholarships for 2010
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2014 GSAT Results for Jamaican Kids
GSAT Exam Preparation
42,000 students will sit for the GSAT Exam in two weeks
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Prime Time for Cicadas
How to Slice a Cake Fairly
42,000 students will sit for the GSAT Exam in two weeks
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Music in the Brain
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Hey batter, wake up!
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Black Hole Journey
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Farms sprout in cities
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Saturn's New Moons
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An Earthlike Planet
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A Clean Getaway
Switchable Lenses Improve Vision
Model Plane Flies the Atlantic
The Parts of Speech
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What is a Verb?
Transportation
Robots on the Road, Again
Morphing a Wing to Save Fuel
Ready, unplug, drive
Weather
Catching Some Rays
A Change in Climate
Polar Ice Feels the Heat
Add your Article

Arctic Algae Show Climate Change

A recent study focused on changes at high altitudes way up north from Canada to Russia. Many of the lakes were on islands in the Arctic Ocean. They were too far away from civilization for people's activities to directly influence them. These lakes freeze over in the winter. That makes the plants and animals that live in them very sensitive to changes in climate. If temperatures warm up even just a few degrees, algae have a longer growing season and so do the animals that eat the plant material. To learn more about how aquatic life has changed over the years in these remote places, scientists from Queen's University in Kingston, Ontario, took 55 samples of sediment from the bottoms of dozens of lakes. Within the samples, they counted remains of tiny creatures including water fleas, insect larvae, and algae called diatoms. The team recorded the numbers of these lake inhabitants at different depths. The deeper the sediment, the older it is. Results showed that ecosystems started to change in many of the lakes about 150 years ago. Populations of water fleas and algae-eating insect larvae increased, for example. And one type of diatom replaced another. The researchers speculate that the shift was a result of climate change. Warming kept lakes unfrozen for a longer period each year, they say. Some species thrive in those conditions. Others do worse. The new study didn't look at what is causing global warming in the first place. Instead, it illustrates that minor shifts in temperature can have major effects on life around the globe.—E. Sohn

Arctic Algae Show Climate Change
Arctic Algae Show Climate Change








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