Publications & Reports

Publications & Reports

The Center supports research on issues of immediate importance to resource managers and policymakers who are challenged to manage the San Francisco Estuary’s natural resources. Obligated to provide a reliable supply of water to agriculture and urban users while protecting and recovering threatened and endangered species and restoring their degraded habitats, responsible state and federal resources agencies face misinformation and critical uncertainties about how at-risk fishes and their habitats are affected by environmental stressors. The Center recognizes Congress’ directive that determinations and decision under the federal Endangered Species Act should be informed by the best available scientific information. The Center’s investigative agenda is intended to provide that scientific information and offer procedural guidance to engage it in structured decision-making and adaptive resource management.

The first step to understanding the ecological needs of a threatened or endangered species is to identify its geographic range and its temporal distribution within that range. Nearly two decades after the delta smelt was listed as threatened under the federal Endangered Species Act that foundational information had not been synthesized and displayed on maps. In this paper we map the distribution of the fish by life stage, providing coverages that enable resources managers to focus conservation activities, including targeted restoration efforts, where and near where delta smelt are most frequently found. Delta smelt are endemic to and narrowly distributed in the upper San Francisco Estuary wherein a single population […]
The U.S. Fish and Wildlife Service and National Marine Fisheries Service are obliged to consult with federal agencies when the actions of those agencies may affect species listed and threatened or endangered under the Endangered Species Act and determine whether such actions are likely to jeopardize the continued existence of the species or result in the destruction or adverse modification of their critical habitats.  The heart of the consultation process is effects analysis, that is, the analysis of the effects of a proposed action on listed species and their designated critical habitats. We propose a structured framework for conducting effects analysis that includes three essential steps—the collection of reliable scientific […]
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