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- Tahoe Yellow Cress (Rorippa Subumbellata) Updated 2024
- Tahoe Yellow Cress Updated 2024
- Action
- Program
- Each Unit (number)
- Maintain at least the number of occupied Rorippa subumbellata survey sites for each lake level as established: Lake level Low (<6,225ft) Occupied sites: 35, Transition (6,225-6227ft) Occupied sites: 26, High (>6,227ft) Occupied sites: 20.
- The number of population sites that are maintained as suitable habitat for sensitive plant species (as determined by a qualified expert).
- This Indicator is reported in the following LT Info areas:
No Subcategories for this Indicator.
Program Tahoe Yellow Cress Monitoring
Approach
Knowledge of TYC distribution has been developed through shorezone surveys since 1979. Before 2000, surveys followed a general protocol and were completed at various times during the summer. Since 2001, surveys are conducted the first week of September following a standardized protocol. During the first survey in 1979, 32 TYC sites were surveyed; this has since grown to 55 sites. A survey “site” is defined as a stretch of public beach, adjacent private parcels, or adjacent parcels under a combination of private and public ownership. Surveys include stem count estimates as a measure of TYC abundance because clonal growth makes it impossible to distinguish individuals. The amount of available shorezone habitat for TYC fluctuates widely with changes in lake level, with high lake levels leaving little habitat. On average, over 70% of surveyed sites are occupied when the lake is below 6,225 ft. in September, but less than 40% are occupied when the lake level is above 6,228 ft.
To download all of the Tahoe yellow cress data on this page please see Tahoe Open Data.
Partners
- California Department of Fish & Wildlife (CDFW)
- California Department of Parks and Recreation (CDPR)
- California State Lands Commission (California SLC)
- California Tahoe Conservancy (CTC)
- League to Save Lake Tahoe (League)
- Nevada Natural Heritage Program (NNHP)
- Nevada Tahoe Conservation District (NTCD)
- Nevada Tahoe Resource Team – Nevada Division of Forestry (NDF)
- Nevada Tahoe Resource Team – Nevada Division of State Lands (NDSL)
- Nevada Tahoe Resource Team – Nevada Division of State Parks (NV State Parks)
- Tahoe Lakefront Owners Association (TLOA)
- Tahoe Regional Planning Agency (TRPA)
- Tahoe Resource Conservation District (Tahoe RCD)
- U.S. Bureau of Reclamation (USBOR)
- U.S. Fish and Wildlife Service (USFWS)
- U.S. Forest Service - Lake Tahoe Basin Management Unit (USFS - LTBMU)
Associated Programs data not provided.