Skip to Main Content
Contact Us

Project: Reconnecting Delta Food Webs: Evaluating the Influence of Tidal Marsh Restoration on Energy Flow and Prey Availability for Native Fishes

Description: Extensive restoration is planned for the upper San Francisco Bay Estuary and Delta; however, little is known about how restoring tidal marshes will affect energy flow, prey availability, and associated food web structure for native fishes. This knowledge gap will be addressed by comparing the relative contributions of pelagic, benthic, and terrestrial habitats to native fish in relic and breached wetlands that differ in restoration age. To accomplish this goal, funding for this Project will be used to monitor physical habitat characteristics and the main components of the food web will be sampled at six study sites that include two relic marshes, two breached wetlands, and two pre-restoration sites. Pelagic and demersal fish, invertebrate prey, and basal resources will be collected, identified, and processed for diet and stable isotope analyses. This data will be used to quantify the functional capacity of target habitat types, informing future restoration and management strategies in the San Francisco Bay Estuary and Delta.

Reference Number: 3600BQ1996030

Implemented By: State Water Contractors

Objective: 1. Compare the quantity, quality, and physical drivers of pelagic, benthic and terrestrial prey among relic and breached wetlands; 2. Quantify allochthonous and autochthonous energy pathways among relic and breached wetlands; and 3. Assess diet for pelagic and demersal fish captured in relic and breached wetlands.

Type: Monitoring, Research/Planning (including Science)

Total Cost: $1,107,041.00

Project Status: Project Implementation

On Time?: Yes    Within Scope?: Yes    Within Budget?: Yes

Estimated Completion: 3/15/2023    Actual Completion:

Associated Counties:

Project Benefits a Disadvantaged Community (or SDAC): No

Contribution SourcesContribution DateContribution Amount
Prop. 1, Water Quality, Ecosystem Restoration and Fish Protection Facilities - Delta10/23/2019$1,107,041.00

Project MetricMetric TopicQuantityUnit
MonitoringAt-risk Species Monitoring/Assessment  
MonitoringWater Quality: Constituents -- Salinity  
Research/Planning (including Science)Feasibility Studies -- Ecosystem Restoration  

Water Action Plan Target

Protect and Restore Important EcosystemsAction Description


loading loading