Alder nitrogen-fixing symbiont
Frankia alni
insectView on iNaturalist
Nitrogen-fixing bacterium symbiotic with native alder trees. Improves soil fertility in riparian zones. Essential for native watershed restoration.
Plants that support Alder nitrogen-fixing symbiont
2 plants
California Alder
Alnus rhombifolia
tree
obligate symbiotic relationship in root nodules; critical for alder nitrogen fixation and riparian ecosystem productivity
Bay Area nativeKeystone species
Red Alder
Alnus rubra
tree
Forms critical nitrogen-fixing nodules in alder root systems; essential for riparian soil health
Bay Area nativeKeystone species