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How much has ocean life declined in the last century?

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Many of the mangroves and sea grasses have been lost. In fact, mangroves are being lost two to five times faster than forests. Also, the oceans' tropical reefs have decreased by half and could all be lost by the year 2050. Much of this is due to warmer waters and acidification. read more

(CNN) --A new global study concludes that 90 percent of all large fishes have disappeared from the world's oceans in the past half century, the devastating result of industrial fishing. read more

Life History: Sea Turtle Decline The number of sea turtles present in all the World's oceans is declining. Film evidence from the major nesting beach of Kemp's Ridleys at Rancho Nuevo, Mexico, indicates that 40,000 females nested there in a single day in 1947. read more

Diseases interact with other pressures on marine species and contribute to marine life decline. The southern sea otter (Enhydra lutris nereis) was decimated in the 1700’s and 1800’s by hunters seeking their pelts. The California population has grown from a group of about 50 survivors off Big Sur in 1938 to just over 2,700 today. read more

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