Posted by: coastlinesproject | January 2, 2013

Jellyfish on a Boom-bust cycle.

Gelatinous Menace? Jellyfish on Boom-Bust Cycle Worldwide

Wynne Parry, LiveScience Contributor
Date: 31 December 2012 Time: 03:19 PM ET
Mastigians jellyfish blooms

Mastigias jellyfish flood Jellyfish Lake, a marine lake in Palau, an island nation in the Pacific Ocean. Here, researchers found that pulsating jellyfish stir up the oceans with as much vigor as tides and winds, making them major players in ocean mixing.
CREDIT: K.Katija/J.Dabiri.

Though some reports suggest jellyfish are taking over the world’s oceans, long-term records of these gelatinous animals fail to show a global increase in jellyfish blooms likely caused by pollution, warming, coastal development and other human influences.

While the analysis of a team of researchers who have pulled together records of jellyfish presence going back to the 19th century don’t support a rising gelatinous menace, the team did find a surprise: roughly 20-year cycles in the abundanceof jellies.

Part of a recent rise-and-fall cycle may have prompted the perception of a global swell in jellyfish, according to the international team, whose researchers are part of the Global Jellyfish Group. They point specifically to the rising phase that began in 1993 and peaked in 2004.

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Read more in; Storm Surge; A Coastal Village Battles the Atlantic, Just Seconds From the Ocean; Coastal Living in the wake of Katrina and Beach Wars; 10,000 Years on a Barrier Beach. See Strawberry Hill, UPNE, and Schiffer book tabs at the top of this page.

 


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