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Coastal ecosystems have been identified by the International Panel on Climate Change (2007) as areasthat will be disproportionally affected by climate change. Recent sea-level rise projections range from 0.57to 1.1 m (Jevrejeva et al. 2012) or 0.75 to 1.9 m by Grinsted et al. (2010) and Vermeer and Rahmstorf(2009) by 2100, which are contingent upon the ambient temperature conditions and CO2 emissions. Sealevelrise projections for San Francisco Bay are 1.24 m by 2100 (Cayan et al. 2008). The expectedaccelerated rate of sea-level rise through the 21st century will put many coastal ecosystems at risk,especially those in topographically low-gradient areas.Sea-level rise response modeling was conducted at 12 tidal salt...
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The aim of this USGS program is to provide site specific sea-level rise predictions to land managers through the intensive collection of field data and innovative predictive modeling. In 2009 and 2010, thousands of elevation and vegetation survey points were collected in salt marsh at 12 sites surrounding San Francisco Bay. The elevation data was synthesized into a continuous elevation model for each site, providing land owners valuable baseline data. This site hosts the project report, pages describing each of the 12 marshes visited in this study, and maps and GIS data for all of the marshes including high-resolution digital elevation models.
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We evaluated the biogeomorphic processes of a large (309 ha) tidal salt marsh and examined factors that influence its ability to keep pace with relative sea-level rise (SLR). Detailed elevation data from 1995 and 2008 were compared with digital elevation models (DEMs) to assess marsh surface elevation change during this time. Overall, 37 % (113 ha) of the marsh increased in elevation at a rate that exceeded SLR, whereas 63 % (196 ha) of the area did not keep pace with SLR. Of the total area, 55 % (169 ha) subsided during the study period, but subsidence varied spatially across the marsh surface. To determine which biogeomorphic and spatial factors contributed to measured elevation change, we collected soil cores...
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Purpose:The purpose of this Walker Basin Meadows Condition Report is twofold. First, it provides condition data and explains why the Walker Working Group chose the first set of meadows as the top priority for restoration. Second, the working group will use information presented here to plan subsequent restoration efforts once the first group of meadows is restored.Introduction:Meadows of the Walker River basin are an extremely valuable component of the landscape. Meadows provide diverse habitat, including habitat critical to endangered species. They reduce peak flows during storms and soak up spring runoff, recharging groundwater supplies. Meadows filter sediment, provide forage, and are important cultural and recreational...
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We developed and delivered a training curriculum for two courses in species distribution modelingthat included sample data, multimedia, and module lesson plans. Target audiences will be planners, managers, and technical analysts (GIS Specialists). Final course content and curriculum are availablethrough partner websites and the California Climate Commons.
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