Cohen AN, Carlton JT
A. N. Cohen, San Francisco Estuary Institute, 1325 South 46 Street, Richmond, CA 94804, USA. J. T. Carlton, Maritime Studies Program, Williams College-Mystic Seaport, Post Office Box 6000, Mystic, CT 06355, USA.
Science. 1998 Jan 23;279(5350):555-8. doi: 10.1126/science.279.5350.555.
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.
生物入侵是一个重大的全球环境和经济问题。对旧金山湾和三角洲生态系统的分析表明，大量外来物种在物种数量、个体数量和生物量方面主导着许多栖息地，且入侵速度很高且在加快。这些因素表明，这可能是世界上受入侵最严重的河口。可能的原因包括大量且多样的传播媒介、贫化的本地生物区系，以及广泛的自然和人为干扰。
