1. Volume 19, Issue 10, Pages R390-R392 (May 2009)
Tangled banks 
Nigel Williams 
Current Biology 
Volume 19, Issue 10, Pages R390-R392 (May 2009)
DOI: /j.cub
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2. Collapse: The decline in sea otters in south-east Alaska has led to a shift from kelp forests to sea urchin barrens. (Picture: Photolibrary/Bruce and Jan Lichtenberger.)
Current Biology  , R390-R392DOI: ( /j.cub )
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3. Interactions: The Serengeti national park represents a complex food web increasingly threatened by human activity around its boundaries. (Picture: Photolibrary.)
Current Biology  , R390-R392DOI: ( /j.cub )
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