Time:

00:49:45

Habitat fragmentation

Ecosystem decay of a fragmented Amazonian rainforest

Seminar with Professor William F. Laurance 24 September 2014

The loss and fragmentation of natural habitats is one of the greatest perils to Earth's biological diversity. Prof. Laurance synthesizes key research findings from the world's largest and longest-running experimental study of habitat fragmentation, located in the central Amazon rainforest.

Over the past 35 years, Amazonian forest fragments ranging from 1 to 100 hectares in size have experienced a wide array of ecological changes. Ecological alterations associated with the abrupt, artificial borders of the fragments have had a very important impact.

Near these forest edges, the forest microclimate is hotter and drier, many trees die, forest-carbon storage is reduced, and animal communities are often disrupted. Rare weather events, especially windstorms and droughts, have further altered the ecology of the fragments.

In general, populations and communities of species in fragments are unstable and often hyper-dynamic, relative to those in nearby intact forests. In addition to the effects of habitat fragmentation, global-scale drivers such as rising levels of atmospheric carbon dioxide appear to be affecting these forests, altering plant and animal communities in several surprising ways

About William Laurance
Professor Laurance's research focuses on the impacts of intensive land-uses, such as habitat fragmentation, logging, and wildfires, on tropical forests and species, as well as climate change and conservation policy. His research spans the tropical world, and he has spent over a quarter century working in the Amazon, Africa, Southeast Asia, and tropical Australia. A leading voice for conservation, Prof. Laurance believes that scientists must actively engage policy makers and the general public, as well as other scientists.

He received his Ph.D. from the University of California, Berkeley in 1989. He then held research positions with the CSIRO and 14 years at the Smithsonian Institution. Laurance joined James Cook University in 2009 where he has a world-class research group. He also holds the Prince Bernhard Chair in International Nature Conservation at Utrecht University, Netherlands, and he is a research associate at Harvard University and the Smithsonian.

He has received a number of major scientific awards including the Heineken Environment Prize, BBVA Frontiers in Ecology and Conservation Biology Award, and a Distinguished Service Award from the Society for Conservation Biology.

Stockholm Resilience Centre is a collaboration between Stockholm University and the Beijer Institute of Ecological Economics at the Royal Swedish Academy of Sciences

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