Highlights From The October 2014 Issue Of The Ecological Society Of America\u2019s Journal Ecology<\/em>, Published Online Today.<\/strong> Invasive seaweed shelters native crustacean<\/strong>: On the tidal mudflats of Georgia and South Carolina, the red Japanese seaweed Gracilaria vermiculophylla<\/em> is gaining a foothold where no native seaweeds live. Only debris and straggles of dead marsh grass used to break the expanse of mud at low tide. Crabs, shrimp, and small crustaceans mob the seaweed in abundance. What makes it so popular? Not its food value. On mudflats near Savannah, Ga., Wright and colleagues found that the tiny native crustaceanGammarus<\/a> mucronatus<\/em> (one of the 9,500 species of amphipod, which includes sand fleas) does not eat much of the seaweed. Rather, its attraction is structural. The seaweed protects the small crustaceans from predators at high tide and from the dry heat of the flats at low tide. G. mucronatus<\/em>was up to 100 times as abundant on seaweed invaded mudflats. Mature forests store nitrogen in soils<\/strong>: Ecologists working in central Pennsylvania forests have found that forest top soils capture and stabilize the powerful fertilizer nitrogen quickly, within days, but release it slowly, over years to decades. The discrepancy in rates means that nitrogen can build up in soils. Forests may be providing an unappreciated service by storing excess nitrogen emitted by modern agriculture, industry, and transport before it can cause problems for our waterways. [Full Press Release<\/a>]
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