MMWD Grassland Restoration and Vegetation Management

Control occurrences of specific invasive plant species whose proliferation threatens stands of rare plants and native grassland communities

In 2019 and 2020, WRA performed invasive plant mapping and control at various grassland sites within the Marin Municipal Water District (MMWD). WRA works closely with the MMWD Vegetation Ecologist and staff and volunteers of the non-profit OneTam organization to provide rapid response to outlying populations and on-going treatment of larger stands of target grassland invasive non-native species. WRA searched within designated grassland habitat areas to identify and map the extent of the target species, then removed the plants using manual methods (hand weeding, mowing, or green flaming). In general, all plants found within designated areas were removed, and many sites were revisited once or multiple times during the growing season for follow-up mapping and treatment. WRA also tracts all work performed and invasive plant species observation using the Cal Flora Observer Pro mobile application. WRA will be conducting monitoring of a pilot study to determine effectiveness of goat grazing for invasive French broom (Genista monspessulana) for MMWD in 2020 and 2021.

The following species were targeted for mapping and removal:
• Cheatgrass (Bromus tectorum)
• Dallis grass (Paspalum dilatatum)
• Goatgrass (Aegilops triuncialis)
• Harding grass (Phalaris aquatica)
• Medusa head (Elymus caput-medusae)
• Pampas grass (Cortaderia jubata)
• Upright veldt grass (Ehrharta erecta)
• Velvet grass (Holcus lanatus)
• Yellow starthistle (Centaurea solstitialis)

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