After Spanish and American settlement Santa Clara Valley rapidly changed from a wild land to agricultural “Valley of Heart’s Delight” to our contemporary urban sprawl. Urbanization in the Santa Clara Valley has resulted in 87-99% habitat loss, depending on the habitat in question. We now depend on historical ecologists to uncover what the character of the land once was. This is troubling not only because habitat-loss is one of the primary drivers of extinction but also because this urbanization impedes valuable ecosystem services. Mediterranean biomes are especially vulnerable to the impacts of urbanization. We often talk about the benefits of trees in terms of clean air, groundwater and flood protection but these services are not limited to trees. Healthy rivers and wetlands act as sponges against flooding and recharge groundwater. Savannas and grasslands hold topsoil in place, preventing erosion and landslides. Tidal marshes are fish nurseries and buffer against storms. The infrastructure benefits of these activities can’t be overstated.

Our City Forest doesn’t only stock native plants. We also stock drought tolerant and urban-friendly trees, grasses and shrubs. The demands put on the urban forest by human activity and the potential safety and infrastructure hazards of large roots or certain pollen types make some natives less suitable for planting. We however, encourage native plants as a means of restoring ecosystem function within the urban environment. Properly selected, maintained and managed native plants can go a long way to restoring some of the ecosystem function to the Santa Clara Valley. Native plant-dominated green spaces can also serve as wildlife corridors, permitting animals to travel safely to suitable habitats and allowing pollinators access to urban plants. Urban environmental restoration projects have met with some success at preserving endangered and threatened species. The Albany Pine Bush Preserve, in Albany NY, is a fantastic example of urban wildlife range that maintains the world’s only surviving population of the Karner Blue Butterfly. Closer to home, LA is undergoing a massive river restoration project. While our focus isn’t on such large-scale restoration projects, Our City Forest acts as a plant provider for restoration projects such as the Ulistac Natural Area and Education Project, Santa Clara. We also encourage residents to plant native plants. We hope that by doing so we can contribute to ongoing greening and restoration efforts while improving the health, water use and character of Silicon Valley.

Thumbnail image comes from Clyde Frogg