Speaker Series

CNPS Yerba Buena's  Virtual Speaker Programs

Please note the unique webinar link contained within for each program description which will take you to the Zoom invitation or registration page.

Video of past speaker programs can be found on our Yerba Buena YouTube Channel




Thursday, June 13, 2024 at 7:30pm

CNPS Yerba Buena Presents: Climate Change, Latent Pathogens, and Large-Scale Tree Mortality in California

Speaker: Matteo Garbelotto, PhD

Matteo Garbelotto, forest pathology expert at UC Berkeley, will share the results of his lab’s research that suggests a connection between climate change and latent pathogens causing recent large-scale tree and shrub mortality in Northern California. He will also provide an update on Sudden Oak Death.

Until a few years ago, plant disease caused by latent pathogens—organisms that alternate among an endophytic phase in which they live within a plant without causing apparent disease, a pathogenic phase in which they cause disease, and a saprobic phase in which they digest dead plant matter—had been thought to occur only in localized situations of acute stress. But since 2015, large-scale mortality of trees and shrubs, both native and exotic, has been occurring throughout Northern California. Pathogen isolation studies revealed that in each of eight tree/shrub species studied, disease was associated with the widespread presence of latent fungal pathogens. Further studies have shown that lack of water and increasing temperatures can lead to higher disease severity. These data suggest that physiological stress caused by changing climate is triggering outbreaks of latent pathogens, regarded now as an additional class of agents causing large-scale mortality in tree populations at the regional scale.

Dr. Matteo Garbelotto is Adjunct Professor in Environmental Sciences at UC Berkeley, UC Cooperative Extension Specialist in Forest Pathology, and editor-in-chief of the Journal of Plant Pathology. At UC Berkeley, he leads the Forest Pathology and Mycology Lab, which focuses on understanding the epidemiology of infectious plant diseases in natural ecosystems. He has been recognized for his efforts in public education, and he is well known for co-discovering the pathogen responsible for Sudden Oak Death.

Zoom Reservation Required: Link Here











Thursday, July 11, 2024 at 7:30pm

CNPS Yerba Buena Presents: Managing Invasive Plants, Tips and tools for everyday use

Speaker: Constance Taylor, Conservation Specialist (Cal-IPC), and Jutta Burger, PhD, Science Program Director (Cal-IPC)

Join speakers from the California Invasive Plant Council (Cal-IPC) to talk about invasive plants and what to do about them! The discussion will cover some basic invasive plant characteristics, how invasive plants are managed across the state, new and existing online resources you can use to help manage invasive plants or prevent their introduction, and how CNPS and other organizations like Master Gardeners play a crucial role in helping stop the spread of invasive plants into Wildlands.

Constance Taylor is staff Conservation Specialist at Cal-IPC with 15+ years of experience tailoring information to audiences; blending cultural literacy and JEDI principles into

environmental education; providing naturalist outreach and adult-centered education; and developing, coordinating, and marketing programs.

Jutta Burger is Cal-IPC Science Director. Her interests lie in understanding invasiveness from a biological, ecological, and evolutionary perspective, and in preserving our native ecosystems by properly prioritizing and implementing invasive control, developing native seed resources, and facilitating restoration. She previously served as Cal-IPC President and as Board Secretary.

Zoom Reservation Required: Link Here


We're pleased to share video links of  Susan Karasoff's (CNPS-YB Outreach chair) popular gardening series with the San Francisco Public Library

Colorful Year Around Gardening with San Francisco Native Plants

Shrubberies, Wind Screens and Ground Covers

Succulent Gardening with Kipp McMichael

Children’s Gardens with San Francisco Native Plants

Gardening for Biodiversity in San Francisco, October, 24, 2020

Shade Gardening with California Native Plants, September 26, 2020

Gardening for San Francisco’s Butterflies and Pollinators, August 22, 2020

Edible Native Fruits & Vegetables of San Francisco, July 25, 2020