Cosmos Times:Earth Environment

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As elephants go, so go the trees — Nov 18, 2014

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Overhunting has been disastrous for elephants, but their forest habitats have also been caught in the crossfire. A first-of-its-kind study shows that the dramatic loss of elephants, which disperse seeds after eating vegetation, is leading to the local extinction of a dominant tree species, with likely cascading effects for other forest life.

Life in Earth’s primordial sea was starved for sulfate — Nov 7 2014

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Earth's ancient oceans held much lower concentrations of sulfate -- a key biological nutrient -- than previously recognized, according to research published this week in Science. The findings paint a new portrait of our planet's early biosphere and primitive marine life. Organisms require sulfur as a nutrient, and it plays a central role in regulating atmospheric chemistry and global climate.