April Robinson

The Delta Landscapes Project, which began in 2012 and will run through 2016, has developed a body of work to inform landscape-scale restoration of the Sacramento-San Joaquin Delta ecosystem.

The objective of this project is to summarize existing research and knowledge around suitable rearing habitat for Chinook salmon in the Sacramento-San Joaquin Delta; identify areas of suitability for rearing salmon using a combined suitability analysis of four mapped habitat parameters; and to provide recommendations for types of restoration needed to improve or restore rearing habitat, as well as to identify where in the Delta these restoration efforts could be prioritized.

Drawing on resilience science, regional data, and local expertise, we will develop the vision and tools that will allow stakeholders in the region ensure that local actions contribute toward the creation of a high-functioning and resilient Silicon Valley ecosystem.

Primary Production, the amount of tissue generated by photosynthetic organisms (e.g., plants and algae) over time, forms the basis of food webs. The Sacramento-San Joaquin Delta has unusually low primary productivity relative to other estuaries (Cloern et al. 2014, Jassby et al. 2002). Food availability has been identified as one contributor to the multi-stressor problem of pelagic organism decline in the Delta (Baxter et al. 2010).  But, the constraints on primary production and the relative importance of different production sources to the food web are major uncertainties in this system. Landscape configuration and hydrodynamics are major drivers of primary production dynamics, and understanding how the extensive historical changes in the Delta’s landscape have altered the system’s potential for supporting wildlife and human populations can inform restoration planning and management across the region. Investigating basics about primary production in the Delta can guide us towards better restoration and management decisions.

The San Francisco Estuary Partnership (SFEP) brings together the estuarine community every two years at the State of the Estuary Conference and, periodically, SFEP also reports on the State of the Estuary, summarizing the latest scientific findings about ecosystem health. This State of the Estuary Report is the only place where a holistic view of ecosystem function is provided across both the Bay and the Delta. This year, SFEI provided scientific leadership and technical support for the report, which focuses on the ties between social and ecological resilience for our estuary.

SFEI and the Santa Clara Valley Water District's (Valley Water) Priority D-5 Project have been conducting baseline ecological condition assessments in Santa Clara County, CA to characterize the distribution and abundance of stream and wetlands in five major watersheds, and assess the overall ecological condition of streams in the watersheds based on the California Rapic Assessment Method for streams (CRAM).  The surveys employ the state's recommended Wetland and Riparian Area Monitoring Plan's aproach that includes the use of GIS-base maps of aquatice resources (BAARI), and spatially-balanced ambient stream surveys using CRAM.

CRAM is a standardized, scientifically defensible rapid assessment method for monitoring the ecological conditions of wetlands throughout California. Because it is standardized, one can compare ecological conditions of wetlands locally, regionally and statewide.

SFEI has released a new paper in the journal BioScience, "Building ecological resilience in highly modified landscapes." The paper, led by Erin Beller of the Resilient Landscapes team in collaboration with a group of international ecologists, presents a new framework for applying ecological resilience science to landscape-scale management, with examples from SFEI's work in urban and agricultural California landscapes.

In 2014, SFEI and the Santa Valley Water District launched a collaborative partnership aimed at sharing experience, knowledge and resources, and working toward a shared vision of watershed management. Through this partnership, the District has asked SFEI to develop a set of online tools to: 1) identify opportunities for multi-benefit management actions in and along the channels managed by the District; and 2) track the impacts of those actions towards meeting established management targets.

In 2011-2014 SFEI and UC Davis developed and implemented a multi-species biosentinel monitoring approach as an effective and efficient way of monitoring methylmercury exposure in wetland restoration projects across the North Bay. The monitoring design for this project was developed with input from a Science Advisory Group (SAG) of regional and national experts and input from local stakeholders, in order to build a design that would address questions of management concern.

Our projects in the Russian River Watershed help us to understand our past, understand our present, and envision our future. Learn more about what SFEI is doing in partnership with others to advance our scientific understanding of this valuable landscape.

Constraints on primary production and the relative importance of different production sources to the food web remain major uncertainties in the Delta ecosystem. Newly available spatial data developed as part of the Delta Historical Ecology and Delta Landscapes projects make it possible to explore the effects of landscape configuration and hydrodynamics on primary production in a way that was not previously possible. Proposed order-of-magnitude calculations estimating primary production can ‘bookend’ the potential magnitude of production in the Delta, and inform what is possible in terms of restoration and management options.

Could restoring lost ecosystems to cities play a role in building ecological resilience across landscapes? In Re-oaking Silicon Valley, a new report by SFEI, we explore this opportunity in our region. Both beautiful and functional, native oaks can be excellent choices for streetscapes, backyards, and landscaping. Requiring little water after establishment, oaks can save money by reducing irrigation requirements while sequestering more carbon than most other urban trees common to our region.

SFEI's Letitia Grenier served as lead scientist of the Baylands Ecosystem Habitat Goals Project, which yielded a report called The Baylands and Climate Change: What We Can Do. The report is an update to the 1999 Baylands Ecosystem Habitat Goals, which for the first time set comprehensive restoration goals for the San Francisco Bay estuary. Produced by a collaborative of 21 management agencies working with a multi-disciplinary team of over 100 scientists, it synthesizes the latest science—particularly advances in the understanding of climate change and sediment supply—and incorporates projected changes through 2100 to generate new recommendations for achieving and sustaining healthy baylands ecosystems.

On June 7, SFEI, in partnership with the Santa Clara Valley Water District and South Bay Salt Ponds Restoration Project, hosted a landscape “visioning” workshop in San Jose. The goal of the workshop was to develop a resilient, multi-benefit vision highlighting opportunities along the South Bay shoreline for supporting both tidal marsh restoration and flood management.

Our partnership with Google to enhance the ecological resilience of urban landscapes is featured in a story by Fast Company, a Google Blog post, and an accompanying video.

The San Francisco Estuary Institute (SFEI) released A Delta Renewed – A Guide to Science-Based Ecological Restoration in the Sacramento-San Joaquin Delta.

We have developed biosentinel species indicators for wetlands to help the SBMP management team make decisions relative to mercury risk about where and how to restore salt ponds to wetlands. 2008 was the third and last year of a project to characterize and monitor bio-available mercury and its uptake into local food webs of the South Bay managed ponds and intertidal habitats, focusing initially on Pond A8 and Alviso Slough. Results indicated that this approach can be used to guide management decisions about wetlands restoration locations.

The Montezuma wetland restoration project is returning ~2,000 acres of diked baylands to tidal, seasonal, and managed wetlands in an eastern portion of Suisun Bay near the town of Collinsville, California in Solano County.

The Tahoe WRAMP Watershed Demontration Project transfered statewide wetland monitoring and asseement tools to Sierra Nevada environmental agencies and organizations through a pilot project that assessed the distribution and abundance of wetlands, and the overall ecologcial condition of streams in two watersheds within the Lake Tahoe Basin.