Accelerating Invasion Rate in a Highly Invaded Estuary

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Science  23 Jan 1998:
Vol. 279, Issue 5350, pp. 555-558
DOI: 10.1126/science.279.5350.555

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Biological invasions are a major global environmental and economic problem. Analysis of the San Francisco Bay and Delta ecosystem revealed a large number of exotic species that dominate many habitats in terms of number of species, number of individuals and biomass, and a high and accelerating rate of invasion. These factors suggest that this may be the most invaded estuary in the world. Possible causes include a large number and variety of transport vectors, a depauperate native biota, and extensive natural and anthropogenic disturbance.

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