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Open Access
Biological annihilation via the ongoing sixth mass extinction signaled by vertebrate population losses and declines
From the Cover
Gerardo Ceballos
,
Paul R. Ehrlich
, and
Rodolfo Dirzo
PNAS
July 25, 2017
114
(30)
E6089-E6096;
published ahead of print July 10, 2017.
https://doi.org/10.1073/pnas.1704949114
You have access
Are we in the midst of the sixth mass extinction? A view from the world of amphibians
David B. Wake
and
Vance T. Vredenburg
PNAS
August 12, 2008
105
(Supplement 1)
11466-11473;
https://doi.org/10.1073/pnas.0801921105
