Description

This is a report on vegetation restoration and management at Don Edwards San Francisco Bay National Wildlife Refuge. Restoring vegetation adjacent to the tidal marshes of San Francisco Bay at large scales has been an elusive goal. Restoration of one hundred thousand acres of tidal marsh is a regional goal for the estuary, and progress is occurring, but restoring the tidal marshupland ecotones and surrounding habitats at such scales was not within our capabilities. These habitats immediately above the intertidal zone are a critical component of the tidal marsh ecosystem, but are dominated by nonnative plants that do not provide high quality habitat for native fauna and exclude native flora. Although onequarter of the estuarys intertidal marshes were not directly impacted by development, many upland habitat types approach extirpation surrounding the estuary. The remaining plant communities are fragmented, their floristic integrity necessarily weakened, which is likely why they now require active propagation to restore. This report summarizes our fourth year of applied research to describe feasible methods for establishing nativedominated plant communities at largescales. We have made significant progress towards that goal and this years testing shows great promise. Seasonal monitoring continues to track performance and additional testing has begun to further refine our methods. For example, we continue to focus on enriching the species palette and improve the adaptability of our seeding mixes across a broader range of site conditions.

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