Colloquium Paper: Microbes on mountainsides: Contrasting elevational patterns of bacterial and plant diversity <http://www.pnas.org/cgi/content/abstract/0801920105v1?etoc> 

Jessica A. Bryant, Christine Lamanna, Hélène Morlon, Andrew J. Kerkhoff, Brian J. Enquist, and Jessica L. Green

Colloquium Paper: A phylogenetic perspective on the distribution of plant diversity <http://www.pnas.org/cgi/content/abstract/0801962105v1?etoc> 

Michael J. Donoghue

Colloquium Paper: Homage to Linnaeus: How many parasites? How many hosts? <http://www.pnas.org/cgi/content/abstract/0803232105v1?etoc> 

Andy Dobson, Kevin D. Lafferty, Armand M. Kuris, Ryan F. Hechinger, and Walter Jetz

Colloquium Paper: Ecological extinction and evolution in the brave new ocean <http://www.pnas.org/cgi/content/abstract/0802812105v1?etoc> 

Jeremy B. C. Jackson

Colloquium Paper: Are we in the midst of the sixth mass extinction? A view from the world of amphibians <http://www.pnas.org/cgi/content/abstract/0801921105v1?etoc> 

David B. Wake and Vance T. Vredenburg

Colloquium Paper: Megafauna biomass tradeoff as a driver of Quaternary and future extinctions <http://www.pnas.org/cgi/content/abstract/0801918105v1?etoc> 

Anthony D. Barnosky

Colloquium Paper: Three ambitious (and rather unorthodox) assignments for the field of biodiversity genetics <http://www.pnas.org/cgi/content/abstract/0801924105v1?etoc> 

John C. Avise

Colloquium Paper: Patterns of biodiversity and endemism on Indo-West Pacific coral reefs <http://www.pnas.org/cgi/content/abstract/0802594105v1?etoc> 

Marjorie L. Reaka, Paula J. Rodgers, and Alexei U. Kudla

Colloquium Paper: How many tree species are there in the Amazon and how many of them will go extinct? <http://www.pnas.org/cgi/content/abstract/0801915105v1?etoc> 

Stephen P. Hubbell, Fangliang He, Richard Condit, Luís Borda-de-Água, James Kellner, and Hans ter Steege

Colloquium Paper: Extinction and the spatial dynamics of biodiversity <http://www.pnas.org/cgi/content/abstract/0801919105v1?etoc> 

David Jablonski

Colloquium Paper: Phylogenetic trees and the future of mammalian biodiversity <http://www.pnas.org/cgi/content/abstract/0801917105v1?etoc> 

T. Jonathan Davies, Susanne A. Fritz, Richard Grenyer, C. David L. Orme, Jon Bielby, Olaf R. P. Bininda-Emonds, Marcel Cardillo, Kate E. Jones, John L. Gittleman, Georgina M. Mace, and Andy Purvis

Colloquium Paper: Species invasions and extinction: The future of native biodiversity on islands <http://www.pnas.org/cgi/content/abstract/0802290105v1?etoc> 

Dov F. Sax and Steven D. Gaines

Colloquium Paper: Resistance, resilience, and redundancy in microbial communities <http://www.pnas.org/cgi/content/abstract/0801925105v1?etoc> 

Steven D. Allison and Jennifer B. H. Martiny

Colloquium Paper: Dynamics of origination and extinction in the marine fossil record <http://www.pnas.org/cgi/content/abstract/0802597105v1?etoc> 

John Alroy

Colloquium Paper: Engaging the public in biodiversity issues <http://www.pnas.org/cgi/content/abstract/0802599105v1?etoc> 

Michael J. Novacek

Colloquium Paper: Extinction as the loss of evolutionary history <http://www.pnas.org/cgi/content/abstract/0801913105v1?etoc> 

Douglas H. Erwin

PERSPECTIVES

Colloquium Paper: In the light of evolution II: Biodiversity and extinction <http://www.pnas.org/cgi/reprint/0802504105v1?etoc> 

John C. Avise, Stephen P. Hubbell, and Francisco J. Ayala