STATUS AND TRENDS OF INDICATORS OF ECOSYSTEM HEALTH THE ESTUARY SAN FRANCISCO BAY AND SACRAMENTO-SAN JOAQUIN RIVER DELTA The San Francisco Estuary Partnership collaborates with partners throughout the Bay and Delta on regional, science-based programs to increase the health and resilience of the San Francisco Estuary. Established as part of the National Estuary Program over 25 years ago by the State of California and the U.S. Environmental Protection Agency, the Partnership manages multi-benefit projects that improve the well-being of wildlife and human communities from the inland rivers to the Golden Gate. More information can be found at sfestuary.org SAN FRANCISCO ESTUARY PARTNERSHIP 375 Beale Street, Suite 700, San Francisco, CA 94105 © 2019 San Francisco Estuary Partnership. All rights reserved. Please cite as The State of the Estuary 2019, San Francisco Estuary Partnership. The Delta Stewardship Council was created in 2009 by the California Legislature to advance the state’s coequal goals for the Sacramento-San Joaquin Delta through the development and enforcement of a long-term sustainable management plan. Informed by the Delta Science Program and Delta Independent Science Board, the Council oversees implementation of this plan through coordination and oversight of state and local agencies proposing to fund, carry out, and approve Delta-related activities. More information can be found at deltacouncil.ca.gov STATUS AND TRENDS OF INDICATORS OF ECOSYSTEM HEALTH THE ESTUARY SAN FRANCISCO BAY AND SACRAMENTO-SAN JOAQUIN RIVER DELTA SAN FRANCISCO ESTUARY A NORTHERN CALIFORNIA ESTUARY THAT INCLUDES THE SACRAMENTO-SAN JOAQUIN DELTA, SUISUN BAY, SAN PABLO BAY, AND SAN FRANCISCO BAY CONTENTS EXECUTIVE SUMMARY . v ESTUARY HEALTH SCORECARD 2019. vi MAKING A POINT OF RESILIENCE . vii UPDATED INDICATORS . 10 FRESHWATER FLOW . 11 TIDAL MARSH . 13 VOICES: RESIDENTS ENJOY CLOSE ENCOUNTERS WITH THE ESTUARY . 15. FISH . 17 . BENEFICIAL FLOODS . .21 . URBAN WATER USE . .23 . VOICES: LANDOWNERS CHOOSE TO DO MORE . 25 . EMERGING INDICATORS . 28 SUBSIDED LANDS . 29. SHORE RESILIENCE . .3 1 . URBAN GREEN SPACE . 33 VOICES: WEAVING JUSTICE INTO ENVIRONMENTAL MANAGEMENT . 35 LOOKING AHEAD . 38 PURSUING RESILIENCE . 39 ASSESSING THE STATE OF THE ESTUARY . 41 CREDITS AND ACKNOWLEDGMENTS . .4 2 . EXECUTIVE SUMMARY J. LETITIA GRENIER, LEAD SCIENTIST The San Francisco fish and wildlife, and give people a place to flows through the Estuary and across its subsidence and nature-based features. Estuary is a large enjoy nature. We also need to think more floodplains continue to be well below Elevation relative to sea level is a basic and diverse system. about human communities as we assess levels that could increase and restore currency that must be tracked as the Pacific Hundreds of miles the health of natural communities. This ecosystem health. Freshwater flows are Ocean rises into the Estuary. The potential of coastline stretch focus means addressing environmental a lynchpin of ecosystem processes that for the Estuary shore to be resilient to Photo: Amber Manfree from the wide valleys injustices that are deeply embedded in sustain physical habitats, fuel the food climate change and continue to provide of the Sacramento and San Joaquin Rivers our culture and patterns of development. web, and regulate water quality. Creative benefits to people is related to how much to the steep headlands of the Golden Gate, The second critical issue to emerge is the approaches to using and re-using fresh of the shore zone is nature-based. The final with vast agricultural fields in the Delta and need for a greater focus on landscape water for environmental purposes are emerging indicator, urban green space, urbanized shorelines in Silicon Valley and resilience—how well the Bay and the Delta needed. Long-term trend analysis shows is a first attempt to assess how access many of the region’s cities. The complexity are equipped to respond to change—so that fish communities in the Bay are to nature is distributed across more and and scale of this system means it can that people and wildlife can thrive as declining. This analysis scores an index of less advantaged communities. More work take years to detect and assess changes. climate change progresses. Taking these 10 attributes of a healthy fish community. is needed to finalize all these emerging This interim State of the Estuary Report two ideas together, this report focuses The index focuses on fish in offshore indicators before they can be included in checks in on a few indicators of health and on the nexus of social and ecological areas, and may not capture benefits to any future quantitative assessment of the explores where the assessment should resilience as we look toward the future. fish from near-shore wetland restoration State of the Estuary. head over time. projects. Despite this slow decline, fish The first section of the Report updates These emerging and updated indicators communities in the saltier parts of the In the four years since the indicators of ecological health that span will help focus efforts to restore the 2015 State of the Estuary remain in good condition, while , two issues have emerged the entire extent of the San Francisco Estuary’s health. In addition to continuing Estuary Report those in the brackish and freshwater as critical to how we assess the health of the Estuary (Bay and Delta). Recent data show the successful aspects of restoration and areas are in poor condition. estuarine ecosystem at the heart of the Bay continued progress along the trajectories conservation that this report describes, Area and the Delta. First, the health of the of the past decade. Tidal marsh restoration The next section of the report discusses we need more investment in creative ways Estuary and of the people who live near it is proceeding at a brisk pace in the Bay three emerging indicators of Estuary to use and restore flows for environmental and depend on it are inextricably linked. We and gaining traction in the Delta, while health, offering options for how to assess health, to expand and build resilient need a healthy Bay and Delta to protect our urban water conservation continues resilience in future reports. Here, for the shorelines and to weave considerations shorelines from sea level rise, help keep our to meet mandated benchmarks, even first time, the resilience of the Estuary’s of social equity more strongly into efforts waters clean, provide food and habitat for during the drought. On the other hand, shores is evaluated through the lens of to improve environmental health. v STATE OF THE ESTUARY 2019 UPDATE 2019 INTRODUCTION vi ESTUARY HEALTH SCORECARD 2019 STATUS AND INDICATOR AT A GLANCE TREND ESTUARY Freshwater flows in the Estuary have been highly altered, causing reductions in inter-annual and seasonal FRESHWATER variability, and peak-flows. Freshwater flows into the Estuary in recent years reflect chronic artificial drought FLOW conditions, in sharp contrast to unimpaired flows. Tidal marsh acreage throughout the Estuary has declined significantly from the historical amount, but restoration BAY DELTA TIDAL e orts are bringing back this critical ecosystem and associated benefits. Projects in the Bay are making extensive MARSH contributions to tidal marsh area, while e orts in the Delta are beginning to make progress towards regional goals. The condition of fish communities varies across the Estuary. In the lower Estuary, fish communities are abundant, BAY DELTA diverse, and dominated by native species. However, in the brackish and freshwater upper Estuary, native fish FISH communities are in poor condition. Based on long-term monitoring data, native fish communities across the Bay are declining. In San Francisco and San Pablo Bays, this long-term data set is from sampling only the o shore areas of the Bay and may not reflect benefits to fish populations from recent wetland restoration. BAY DELTA The frequency, magnitude, and duration of floodplain inundation in both the Bay and the Delta are too low to BENEFICIAL support healthy estuarine habitats and sustain important ecological processes. While conditions have been FLOODS variable over time, they have, in general, remained poor in the Delta and have declined in the Bay. In both the Bay and Delta, total and per-capita urban water use have declined over the last several decades, despite BAY DELTA URBAN growing populations. More e icient urban water use means that both regions met and exceeded benchmarks for WATER USE per-capita use and drought-reduction targets. The regions have modestly increased water use since the end of the drought but still maintained improvements over their 2020 benchmarks for reductions in per-capita use. LEGEND STATUS TREND Good Fair Poor Improving No Change Declining Mixed v STATE OF THE ESTUARY 2019 UPDATE 2019 INTRODUCTION vi MAKING A POINT OF RESILIENCE CAITLIN SWEENEY, DIRECTOR, SAN FRANCISCO ESTUARY PARTNERSHIP Now more than ever, it is important to know whether our efforts to repair and restore the San Francisco Estuary are actually working. In a time of shrinking budgets, changing conditions, and mounting pressure to achieve as many benefits as possible with each project, knowing the degree of real progress can be a game changer. Good data and sound science enable us to show both the public and the private sector the actual degree to which the ecosystem is improving or becoming more resilient. It’s not a matter of just checking our work one time and walking away. These checkups must occur many times over many years, especially as we learn from our mistakes and innovate our approaches. This interim report is made to Delta and Bay Area citizens on the heels of our more comprehensive 2015 State of the Estuary Report, and the reports that preceded it. The San Francisco Estuary Partnership came into being in 1988 and has been working collaboratively with dozens of federal, state, NGO, community and business partners to protect and restore our Bay and Delta ever since.