Letitia Grenier

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 Resilience Atlas is an interactive mapping platform that visualizes the past, present and future conditions of the Bay’s edge and surrounding watersheds by combining layers of information, such as shoreline infrastructure, shoreline change over time, and sea level rise. 

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

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.

The challenges of accelerating sea level rise and aging shoreline infrastructure are creating a once-in-a-century opportunity to redesign the Bay shore. Originally constructed with little regard for the Bay, the future shoreline can more successfully integrate the natural and built environments to make a healthier shore for both the Bay and local communities. New shoreline design approaches must incorporate the complex ecological and physical processes of our urbanized estuary while anticipating the future challenges of climate change and extreme weather.

The challenges of accelerating sea level rise and aging shoreline infrastructure are creating a once-in-a-century opportunity to redesign the Bay shore. Originally constructed with little regard for the Bay, the future shoreline can more successfully integrate the natural and built environments to make a healthier shore for both the Bay and local communities. New shoreline design approaches must incorporate the complex ecological and physical processes of our urbanized estuary while anticipating the future challenges of climate change and extreme weather.

SFEI's Resilient Landscapes Program has developed a Landscape Resilience Framework, with the goal of facilitating the integration of resilience science into environmental management, urban design, conservation planning, and ecological restoration. The framework proposes seven key landscape attributes that contribute to ecological resilience, providing details and examples on each.

SFEI scientists are currently working with regional partners and science advisors to assess the future sediment supply to the Bay and how that compares to the sediment needed for baylands to survive sea-level rise. Currently, baylands (tidal marshes and mudflats) are receiving enough sediment to keep pace with sea-level rise. However, sea-level rise is expected to accelerate in the coming decades, which could cause baylands to drown unless they get more sediment.

Letitia Grenier continues to work with partners around the region to get the word out about the new ideas in the Baylands Goals Science Update 2015. Getting the public and the sea level rise adaptation community on board with the many benefits of restoring and maintaining the Baylands is a priority in the wake of the release of the Baylands Goals Science Update in late 2015. With the Restoration Authority ballot initiative to be presented to voters this summer, there is great demand to hear about the value of tidal wetlands and importance of a healthy shore.

The Delta Science Program, CDFW Watershed Restoration Grants Branch, and the Surface Water Ambient Monitoring Program will jointly host a Delta Science Brown Bag seminar on October 25th

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.

This project reconstructs the historical hydrology and ecology of the Petaluma River watershed prior to major Euro-American modification. It demonstrates the efficacy of historical hydrology and ecology in identifying and prioritizing multi-benefit restoration opportunities.

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.

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.

Erica Spotswood and a team of other SFEI scientists have developed a framework outlining the key elements for supporting biodiversity in urban environments. 

SFEI's Letitia Grenier appears in a San Jose Mercury News article by Paul Rogers, describing the 50th anniversary of Earth Day and the challenges we still face: "After generations of filling and paving, by 1970 there were only about 35,000 acres of tidal marsh left around San Francisco Bay. Today restoration projects have increased that to 53,000 acres, with plans underway to restore another 21,000 acres, said Letitia Grenier, a senior scientist with the San Francisco Estuary Institute. The eventual goal is to get to 100,000 acres — roughly half the total from 200 years ago — for fish, birds, human recreation and a much cheaper form of flood control than building concrete walls."

We offer you a simple tool that we created for our 75-person “work community” to help each other that yours might also find helpful. This is a mapping tool, which we call Care in the Time of Corona. It helps us locate and efficiently provide the support that our SFEI staff might offer one another. Quite simply, it facilitates assistance within our organization so that people can help their colleagues deal with challenges of this unprecedented situation. The errands, food, medicine, or even compassionate discussion they need can be addressed through a convenient and filterable map. We hope this guidance and the spirit behind it will help support your community and sustain a sense of well-being as we meet this challenge head on together.

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 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.