Despite rapid and substantial growth in the amount of land and sea designated as protected habitat over the last four decades, the diversity of species the world over is plummeting, a new study has found.
Over 100,000 so-called "protected areas" representing some 7 million square miles of land and nearly 1 million square miles of ocean have been established since the 1960's, noted the analysis, published Thursday in the journal Marine Ecology Progress Series.
And yet, according to a widely cited index used to track planetary biodiversity, the wealth of terrestrial and marine species has seen steady decline over roughly the same period, suggesting that simply protecting swaths of land and sea -- a common conservation strategy worldwide -- is inadequate for preventing the steady disappearance of earth's creatures.
Over 100,000 so-called "protected areas" representing some 7 million square miles of land and nearly 1 million square miles of ocean have been established since the 1960's, noted the analysis, published Thursday in the journal Marine Ecology Progress Series.
And yet, according to a widely cited index used to track planetary biodiversity, the wealth of terrestrial and marine species has seen steady decline over roughly the same period, suggesting that simply protecting swaths of land and sea -- a common conservation strategy worldwide -- is inadequate for preventing the steady disappearance of earth's creatures.