San Francisco Bay Area Network

Plant Communities

Numerous biotic and abiotic factors have altered and continue to threaten plant communities within SFAN. As plant communities continue to recover from past resource extraction and grazing, there is a need to understand how current activities are effecting this recovery. It is also important to monitor and evaluate changes to the composition of plant communities and type changes occurring on the landscape. The monitoring program proposed assimilates multiple vital signs including invasive plant species, threatened and endangered plant species, wetlands, grassland plant communities, oak woodlands, and plant species at the edge of their range. There are also significant ties between plant community change and almost all of the faunal indicators being monitored such as landbirds, Northern spotted owls, endangered butterflies, etc.

Reports & Resources

Botanical Inventory of Pinnacles National Monument

 

Contact Information

Andrea Williams
Natural Resource Specialist
415-331-0639

Link to Intranet Page (NPS only)

Monitoring Objectives

Develop and maintain a list of priority plant communities based on their rarity and degree of protection.

Detect long-term trends in native and non-native abundance and distribution within selected plant communities.

Detect changes in overall vegetation cover, vegetation type and species composition of selected SFAN plant communities.

Monitoring Protocol

  • Create a sampling design for a network of permanent plots that efficiently detect and monitor changes in the composition and structure of selected plant communities throughout San Francisco Area Inventory and Monitoring Network of Parks. Stratify the landscape by elevation, slope position, aspect, and soil type.
  • Establish a subset of the sampling scheme created above and collect vegetation data as a pilot study.
  • Design the plant community sampling scheme to capture several of the highly ranked broad vegetation related indicators. Intensify data gathered at plots in communities of interest.
  • Design the plant community monitoring program to detect changes in abundance (at specified levels and power) for rare and non-native invasive species that are targeted to monitor at the community level.
updated on 06/01/2007  I   Email: Webmaster
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