Feature Story - June 2013
The diversity of the tropics helps keep invasive species low.
Researchers conducted the first experiments testing the biotic resistance hypothesis. This hypothesis predicts that diverse communities, such as those in the tropics, are more resistant to invasion then communities that are less diverse. These experiments showed that introduced tunicates were more susceptible to predation in Panama then in Connecticut. Full Story
Cox, Traci E., Philippoff, Joanna, Baumgartner, Erin, Zabin, Chela J. and Smith, Celia M. 2013. Spatial and Temporal Variation in Rocky Intertidal Communities Along the Main Hawaiian Islands. Pacific Science, 67(1): 23-45.
First, Matthew R., Robbins-Wamsley, Stephanie, Riley, Scott C., Moser, Cameron S., Smith, George E., Tamburri, Mario N. and Drake, Lisa A. 2013. Stratification of Living Organisms in Ballast Tanks: How Do Organism Concentrations Vary as Ballast Water Is Discharged? Environmental Science & Technology, doi:10.1021/es400033z
Freestone, Amy L., Ruiz, Gregory M. and Torchin, Mark E. 2013. Stronger biotic resistance in tropics relative to temperate zone: effects of predation on marine invasion dynamics. Ecology, doi:10.1890/12-1382.1
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Dr. Gregory M. Ruiz/Senior Scientist
Smithsonian Environmental Research Center
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