The subtleties of tropical forest demise

September 05, 2006

"It's not just that tropical forests are being rapidly destroyed, but also that most of the remaining forests and nature reserves are being severely degraded," said William Laurance of the Smithsonian Tropical Research Institute in Panama, who co-edited the book along with Carlos Peres, a Brazilian biologist with the University of East Anglia, U.K.

"It's astonishing how insidious many of the threats are," said Peres. "We rely on satellite images or aerial photos to tell us how fast tropical forests are disappearing, but many of the new and emerging threats are virtually invisible, unless you're on the ground."

The editors define four categories of emerging threats to tropical forests: (1) Those that have only recently appeared, such as the virulent chytrid-fungus pathogen that is decimating rainforest amphibians throughout the tropical world. (2) Those that are growing rapidly in importance, such as destructive surface fires in tropical forests. (3) Those that are poorly understood, such as the impacts of global warming and other growing atmospheric alterations on tropical ecosystems. (4) Environmental synergisms, where two or more simultaneous threats--such as habitat fragmentation and wildfires, or logging and over hunting--dramatically increase local extinctions of tropical species.

"Many of the emerging threats to tropical forests become apparent only after exhaustive, long-term field studies," said Peres. "That's one of the reasons they're so universally underestimated. Even big parks and nature reserves are suffering in many important ways."

"We immediately notice when forests burn or trees come crashing down, but not when frogs disappear or plants stop reproducing because their critical pollinators have vanished," said Laurance.

The 23 chapters in the book span much of the tropical world, including South America, Africa, Southeast Asia, Australia, and Oceania. In addition to documenting a range of new and growing dangers to tropical forests, much attention is focused on strategies for mitigating and alleviating the emerging threats.

"We designed this book for a very broad audience," said Laurance. "It's for anyone interested in the fate and survival of tropical ecosystems. "The book includes syntheses by many world-leading authorities as well as original, data-rich studies.

About the Editors
William Laurance is a senior scientist with the Smithsonian Tropical Research Institute in Panama, and is also president of the Association for Tropical Biology and Conservation, the world's largest scientific organization devoted to the study and wise use of tropical ecosystems. He has active research programs in the Amazon and Central Africa.

Carlos Peres is a Reader in tropical ecology and conservation at the University of East Anglia, U.K. He is a recipient of a Bay Foundation 'Biodiversity Conservation Leadership Award', and was previously elected an 'Environmentalist Leader for the New Millennium' by Time Magazine and CNN Network. He works extensively in the Brazilian Amazon.

About the Book
William F. Laurance and Carlos A. Peres, editors (2006) Emerging Threats to Tropical Forests. University of Chicago Press, Chicago, 530 pages. Price: $40 (softcover), $110 (hardcover).
-end-
For further information:

Dr Carlos Peres
University of East Anglia
Norwich, U.K.
Email: c.peres@uea.ac.uk
Phone: +44-1603-592549


Photos: slash&burn.jpg The aftermath of slash and burn farming in the Amazon. Credit: Dr. William Laurance.

Emergingthreats.jpg Book jacket

The Smithsonian Tropical Research Institute (STRI), a unit of the Smithsonian Institution, headquartered in Panama City, Panama, furthers our understanding of tropical nature and its importance to human welfare, trains students to conduct research in the tropics and promotes conservation by increasing public awareness of the beauty and importance of tropical ecosystems. www.stri.org

Smithsonian Tropical Research Institute

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