11 Ergebnisse.

The Tijuana River Valley Historical Ecology Investigation synthesizes hundreds of historical maps, photographs, and texts to reconstruct the ecological, hydrological, and geomorphic conditions of the Tijuana River valley prior to major European-American landscape modification. How did the valley look and function before there was the state of California, the city of Tijuana, or an international border? What habitat types and wildlife were foun...

As we rethink land management along the San Francisco Bay shoreline in the face of climate change, we know well-functioning resilient tidal landscapes can protect development and sustain native ecosystems. Here, we present a possible future vision for lower Walnut Creek and adjacent baylands that includes several components that would restore and support natural processes, and, in turn, benefit aspects of flood risk management and ecosystem fu...

This report offers guidance for creating and maintaining landscapes that can provide desired ecological functions for decades to come. Based on extensive research into how the Sacramento-San Joaquin Delta used to function, how it has changed, and how it is likely to evolve, we make recommendations for how to re-establish the dynamic natural processes that can sustain native Delta wildlife as healthy populations into the future. The app...

This study provides an understanding of the physical and ecological changes to lower Novato Creek and the surrounding tidal marshes and mudflats. The specific objectives of the study are to: 1) reconstruct the historical ecology and hydrography of lower Novato Creek and baylands during the mid-19th century, and 2) assess ecological change over time within lower Novato Creek and baylands through comparisons of reconstructed historical and conte...

As sea level rise accelerates, our shores are increasingly vulnerable to erosion. This study is the first systematic analysis of the rates of marsh retreat (erosion) or expansion (progradation) over time for San Francisco Bay. Key findings include: . 60% of the marshes in San Pablo Bay have been expanding over the past two decades (1-4 m/yr) . 6% are retreating . Some areas have been expanding for over 150 years . Shore change is a potent...

This report describes a project funded by the National Park Service to collect and assess historical data about the Mt. Wanda unit of the John Muir National Historic Site south of downtown Martinez, CA. The report conducted an initial synthesis of the data to enhance understanding of early ecological conditions, and evaluate the potential benefits of further data collection and analysis.

The Landscape Resilience Framework is designed to facilitate application of resilience principles to ecosystem management by detailing the seven dimensions of a landscape that contribute to resilience. It represents a synthesis of thinking across empirical ecological studies and social-ecological resilience theory, and was reviewed by a team of expert advisors. Our goal was to create a concise and comprehensive set of key considerations that c...

This document presents a preliminary vision for landscape resilience across the streams, hills, baylands, and urban areas of Silicon Valley. It is a product of Resilient Silicon Valley, a project of the San Francisco Estuary Institute to create a science-based vision for ecosystem health and resilience in Silicon Valley (resilientsv.sfei.org). The vision outlined here was developed by applying a set of resilience principles (Beller et a...

Recent state policy sets ambitious goals for ecosystem restoration in the Sacramento San Joaquin Delta. The Delta Plan and California Water Code, as well as other regional documents, identify the need to go beyond small-scale habitat restoration to create larger functional landscapes of interconnected habitats. Yet there is little quantitative guidance available to help design the complex spatial systems that are likely to achieve these goals....

The Northern San Diego County Lagoons Historical Ecology Investigation reconstructs the landscape and ecosystem characteristics of northern San Diego County lagoons prior to the major modifications of the late 19th and 20th centuries.

This report describes the Sacramento-San Joaquin Delta Historical Ecology Study, which was conducted to provide foundation information to develop sound large-scale restoration efforts in the Delta. The report documents early 1800s pattern and process in the Delta. Historical habitat type extent and distribution are described, the landscape context explored, and driving hydrological and other physical processes examined.