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Showing posts from November, 2018

SPECIES INVASIONS: Water Hyacinth and Zebra Mussels

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By Bianca T. Esposito Intern at No Water No Life Water hyacinth (Eichhornia crassipes) is a perennial, free-floating aquatic weed, native to South America’s Amazon River, but carried overseas for ornamental use. Today the water hyacinth is considered to be the “world’s worst aquatic weed.” This aggressive, invasive species spreads rapidly over entire surfaces of lakes and ponds and can double its coverage in just two weeks. Yet its ability to withstand drastic fluctuations in flow rates, acidity and low nutrient levels makes it a viable and popular water-garden plant. Since imported to North America in 1884, it has invaded the Columbia and Mississippi River Basins, two NWNL case-study watersheds. Also introduced into East Africa, it is present in three NWNL basins: those of the Omo, Nile and Mara Rivers. Recorded in Egypt as early as the 1890’s, water hyacinth became a “plague” in the late 1900’s. River control schemes, such as dams, barrages and irrigation canals have encourage

A Call to Protect the Arctic National Wildlife Refuge

The International League of Conservation Photographers (iLCP) led a series of Rapid Response Expeditions into Alaska's Arctic National Wildlife Refuge to highlight the urgent need to protect this threatened national treasure as these 19 million acres is under threat from oil-drilling and related activities. With their partners The Wilderness Society and the Alaska Wilderness League they led 8 expeditions with 40 storytellers gathering images, video, and artwork to help raise awareness and to encourage Congress to reconsider the decision to allow drilling in the Coastal Plain of Alaska’s Arctic National Refuge

Contaminating Mars

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Ethics of Space Exporation The biggest thinkers from around the world discuss the dangers of contaminating Mars through exploration. If the red planet is sterile, a human presence there would create no moral or ethical dilemmas on this front. But if life does exist on Mars, human explorers could easily lead to the extinction of Martian life. 
Don't Mine Yellowstone from Eric Ian on Vimeo .