Delta Ecological Survey (Phase I): Nonindigenous Aquatic Species in the Sacramento-San Joaquin Delta. A Literature Review.

摘要

Introductions of nonindigenous aquatic species (NAS) are a significant threat to estuarine and freshwater systems worldwide. Discharge of ballast water is an important pathway of these invasions, leading to national, international, and state efforts to regulate ballast water discharge and document the current status of NAS and rate of introductions into major port systems such as the Sacramento-San Joaquin Bay-Delta and river system. This project examines the sources, . ' vectors, and extent of invasions into the Delta, the most upstream portion of the San Francisco Estuary system. We reviewed the literature on NAS in the Delta, developed a database format to store, organize and present this information, and analyzed the sources, vectors, and time-sequence of introductions of both estuarine and freshwater NAS currently found in the Delta.