Posts Tagged: climate

UC Davis Seminar: French Reseacher to Target Climate Change

You won't want to miss ecologist Sylvain Pincebourde's virtual seminar on climate change, hosted by the UC Davis Department of Entomology...

These images will help tell the story when ecologist Sylvain Pincebourde presents a UC Davis-sponsored seminar on climate change on March 15.

These images will help tell the story when ecologist Sylvain Pincebourde presents a UC Davis-sponsored seminar on climate change on March 15.

Los Angeles 4-H program cultivates future generation of water stewards

Ibrahim Yaaseen, member of the Palos Verdes Peninsula (PVP) 4-H club, grabs a hard hat and places it on top of his head. He then reaches for a bright orange safety vest and goggles to complete his safety gear outfit before joining the rest of his club members who are dressed the same.

The 4-H Youth Development Program of Los Angeles is already thinking about the future of water management and turned to the West Basin Municipal Water District in El Segundo to gain a deeper understanding of the precious resource we often take for granted.

The University of California 4-H Youth Development Program is managed through local Cooperative Extension offices. Through hands-on learning experiences, 4-H empowers youth to reach their full potential and enables them to build self-esteem, connect with their community and emerge as leaders.

Dee Keese, community club leader for the PVP 4-H club, coordinated an exclusive and interactive tour of West Basin's Edward C. Little Water Recycling Facility for the club's monthly marine biology meeting in December 2022.

Eager to inspire a stronger appreciation for water, Janel Ancayan, the West Basin's education coordinator, challenged the youth to build their own water filters using materials including fabric, a strainer, and a funnel. Since no specific directions were given, the activity challenged each student's science and engineering skills, such as carrying out an investigation, designing a solution, and communicating information with team members.

During the tour, students saw firsthand the impressive equipment and essential staff members that help to produce nearly 40 million gallons of recycled water each day. At the end of the day, students left with a deeper understanding of water resources and felt empowered to do their part to conserve water sources.

“We learned that recycling water helps to conserve our limited water supply and improves the environmental condition of our coastal waters,” said Yaaseen. “We ultimately learned a great deal about how to conserve water for future generations and that water conservation is one of the most important elements in combating climate change.”

Though Keese has volunteered as community club leader for 48 years, this is only the second time she has partnered with the West Basin. “I like to mix it up,” she said. “I'm always looking for community organizations and local businesses to partner with because these are places that the kids will likely interact with since they're nearby.”

Regardless, it's leaders like Keese and programs like 4-H that encourage water stewards like Ancayan. “I'm always so humbled and inspired when teachers make it a point to come out and visit our facility. In Southern California especially, [water] is not something we think about,” Ancayan said. 

Even in a drought, water continues to flow from our faucets allowing us to shower, wash dishes or water the lawn. It's no wonder why water conservation is not always top of mind, especially for consumers. Educating the public, and targeting the younger generation, however, is a great start to prepare for the future.

West Basin offers a variety of educational programs that focus on different age groups. Many of them involve hands-on learning like the Teach and Test volunteer program, a partnership with the Surfrider Foundation, where high school students test samples of coastal water for bacteria, and then publicly share their findings to contribute to water quality monitoring in the area.

According to Yaaseen, the time spent with Ancayan at the West Basin was “one-of-a-kind” and provided a “golden opportunity” to learn why water recycling facilities are important. Ancayan hopes that her time spent with students ultimately influences them to consider a career in water.

“It's not a glamorous job but I'm really passionate about the next generation of water workers,” she said. “I hope that once they see the engineering, the excitement of these scientists that work in our laboratory and everything in between, that they start to think about water as a future career path.”

For those interested in joining 4-H, visit https://4h.ucanr.edu/Members/

UCCE seeks statewide input to develop future wildfire programs

University of California Cooperative Extension has recently expanded their team of fire advisors and staff. This new group of UCCE fire professionals is interested in learning about the concerns of the communities that UCCE serves, as well as the natural resource professionals already working to address these issues.

Results from this survey will enhance the team's ability to partner with residents, landowners, agencies, academics, and other organizations to reduce California's vulnerability to wildfires. These new advisors will also share survey results with UCCE colleagues throughout the state, who already provide important fire-related programming across diverse landscapes and audiences.

"Wildfires will continue to affect all Californians, either directly or indirectly," said Katie Low, UCCE statewide fire coordinator. "It's invaluable to have the input of as many people as possible to guide the development of our wildfire-related extension programs, so that they can provide the most useful resources and information to communities across California."

The survey asks questions about topics such as:

• Gaps within existing educational programming and resources
• Challenges community members are facing in addressing wildfire risk
• Empowerment of communities to make property management decisions and prepare for wildfire
• Acceptability of prescribed fire and other fuels treatments

By participating in this study, you can choose to enter a drawing to win one of fifty $20 VISA gift cards.

To take the online survey, please visit https://bit.ly/UCCE_Fire_Survey.

This research is being led by a team of new UCCE fire advisors and staff. If you have any questions about this survey, please contact the fire/forestry professionals involved in this survey effort:

• Luca Carmignani, UCCE fire advisor for Los Angeles, Orange, Riverside, and San Diego counties, carmignani@ucanr.edu
• Alison Deak, UCCE fire advisor for Fresno, Madera, and Mariposa counties, aldeak@ucanr.edu
• Katie Low, UCCE fire academic coordinator for Nevada and Placer counties, katlow@ucanr.edu
• Barb Satink Wolfson, UCCE fire advisor for Monterey, San Benito, Santa Clara, and Santa Cruz counties, bsatinkwolfson@ucanr.edu
• Ryan Tompkins, UCCE forestry advisor for Plumas, Sierra, and Lassen counties, retompkins@ucanr.edu

For more information about wildfire-related programming from University of California Cooperative Extension, please visit https://ucanr.edu/sites/fire/ or the Facebook page https://bit.ly/fireSolutions.

Climate change may reduce frost damage to orchard crops

CalAgroClimate web tools help farmers prepare for frost events

A cold snap damaged almond blossoms across the Central Valley, resulting in more than $44 million in crop insurance claimsin late February 2018. A multi-day frost event wiped out roughly 75% of California's citrus crop and severely damaged avocados in January 2007. Frost can damage crops, impact growers' bottom lines and drive up food prices for consumers. With advance notice, farmers may be able to use heaters, wind machines, irrigation and other tactics to lessen some of the impacts of cold weather, such as damaging near-ripe citrus fruit or killing the bloom in almonds.  

CalAgroClimate is a new farmer-focused website that can help growers anticipate weather-related risks and make plans for taking defensive action. Growers and crop consultants can use CalAgroClimate's crop and location-specific tools and resources to help prepare for upcoming frost events. The website's tools can also support on-farm decisions for managing heat, crop development and pests. 

Future holds less frost

The risk of frost damage to crops and the need to prepare for that risk is top-of-mind for many farmers today, but will it always be so? To examine what climate change might mean for future frost risk, researchers at UC Davis, UC ANR and the USDA California Climate Hub conducted a study examining the incidence of temperatures below multiple “frost thresholds” during the months of critical development phases for three frost-sensitive California crops: almonds, avocados and navel oranges.

The researchers found that even during the coldest winters and springs, the incidence of frost exposure declined under projected mid-21st century climate conditions by more than 50% for almonds and oranges, and by more than 75% for avocados. While farmers in 2050 will not find frost risk to completely be a worry of climates past, they will not have to contend with the same frost concerns that farmers face today.

Beyond the obvious benefits of reduced risk of crop damages, additional benefits of reduced frost exposure include lower water use and energy costs associated with mitigation actions. Irrigation is a primary means of protecting crops from frost temperatures, and with fewer hours below freezing that means fewer hours of running water and using pumps. The authors of the future frost exposure study showed that growers may collectively save tens of thousands of acre feet of water and enjoy millions of dollars in energy savings.

Few aspects of climate change are considered “positives,” and although the warming winters and springs that result in reduced frost temperatures could also come with increased pest pressure, reduced chill accumulation and other challenges, the reduction in frost exposure is a silver lining.

However, until this frost-free future arrives, growers still need to be prepared to protect their orchards from frost. To assess frost risk for the next seven days for your location, check out the new interactive Frost Advisory Tool at CalAgroClimate.org.

Your water-efficient landscape doesn’t have to be barren

UC climate-ready landscape trials identify low-water yet attractive plants

Good news: roses can be a part of your water-efficient landscape. Lorence Oki, UC Cooperative Extension environmental horticulture specialist in the UC Davis Department of Plant Sciences, identified rose cultivars that remain aesthetically pleasing with little water.  

Oki is the principal investigator of the Climate-Ready Landscape Plants project, which may be the largest irrigation trial in the western U.S., and the UC Plant Landscape Irrigation Trials (UCLPIT), the California component of that project. These projects evaluate landscape plants under varying irrigation levels to determine their optimal performance in regions requiring supplemental summer water.

“There are some assumptions that pretty plants use a lot of water, like roses,” Oki said. “Everyone thinks they need a lot of water, but we've found some that don't, and they still look great. A water-efficient landscape doesn't need to look like a Central Valley oak-grassland in the summer. It can look really attractive.”

In 2021, Oki's team at UC Davis identified Lomandra confertifolia ssp. pallida "Pom Pom" Shorty and Rosa "Sprogreatpink" Brick House® Pink as two of the best low-water plants in the trial. 

“The useful tip or information that is shared at the end of each trial is the selection and designation of plants as Blue Ribbon winners. These are the plants that looked good with an overall rating of 4 or higher throughout and were on the low (20%) water treatment,” said Natalie Levy, associate specialist for water resources, who manages the project at the UC ANR South Coast Research and Extension Center.

How plants earn a blue ribbon

Each trial year, the selection of new plants is based on research recommendations and donated submissions from the nursery industry. The landscape plants are trialed in full sun or 50% shade cover.

Irrigation treatments are based on the rate of evaporation and plant transpiration (evapotranspiration) measured through a local California Irrigation Management Information System (CIMIS) weather station that provides a reference evapotranspiration (ETo) rate.

Three levels of irrigation are provided to the plants equal to 20%, 50%, and 80% of ETo. The volume of water applied is the same at each irrigation based on soil characteristics, but the interval between applications varies with weather and the treatment. Using this method, irrigations for the 20% treatment are less frequent than the 80% treatment.

“The 20% treatment during the 2022 trial was irrigated an average of once per month while the 80% treatment was irrigated weekly,” explained Levy.

During the deficit irrigation trial, monthly height and width measurements are taken to determine the plant growth index. Monthly qualitative aesthetic ratings on a scale of 1 to 5 are determined for foliage appearance, flowering abundance, pest tolerance, disease resistance, vigor and overall appearance.

A second round of flowering abundance and overall appearance measurements are also taken to capture more of the blooming period. For example, UCLPIT identified in the 2020 trial at South Coast REC that the "Apricot Drift" rose had a mean overall appearance score of 3.5 out of 5, deeming it “acceptable to very nice” and a low water use plant within the Water Use Classification of Landscape Species or WUCOLS guide.

Project expands options for landscape planting

While attending UC Davis as a master's student, Karrie Reid, retired UCCE environmental horticulture advisor for San Joaquin County, assisted Oki with landscape water conservation research. The landscape plant irrigation assessments were initiated at UC Davis in 2004 and the UCLPIT project, now in its 20^th year, originated from her master's thesis project from 2005 to 2007. A CDFA grant supported duplicating these fields at the South Coast REC in 2017.

“(WUCOLS) only has 3,500 plants in it. There are guesses that there are close to 10,000 cultivars in urban landscapes in California, if not more,” said Oki. “WUCOLS also didn't have numerical ratings. Instead, you'll see verbal ratings like ‘low water use' or ‘high water use.'”

The UCLPIT project has not only developed numerical recommendations for irrigation, but it has also added new landscape plants that are compliant with California's Model Water Efficient Landscape Ordinance. In fact, UCLPIT's data is one of the few sources that can be used to supplement WUCOLS.

Geographic diversity of trial sites adds to knowledge base

In addition to UC Davis and South Coast REC in Irvine, the trials have expanded beyond California as the Climate-Ready Landscape Plants project and is in progress at Oregon State University, University of Washington, University of Arizona and Utah State University thanks to a USDA/CDFA grant awarded in 2020.

Lloyd Nackley, associate professor of nursery production and greenhouse management at Oregon State University, is the principal investigator of the trial in the Portland metro area, which is entering its third year.

“People know that there are drought tolerant plants, but there are many. We're trying to highlight lesser known or newer varieties. And even though the trial is three years, most gardeners would hope that their garden lasts longer than that,” said Nackley.

One of the observations that Nackley recalls is of the Hibiscus Purple Pillar plant. Unlike the trial at South Coast, the Purple Pillar did not perform well in Oregon in the spring.

“It wasn't until August that we saw the plant bloom and begin to look like what we saw from South Coast in April,” Nackley said.

Ursula Schuch, horticulture professor and principal investigator of the trial taking place at the University of Arizona, was also surprised at the range of performance among different plant types and the effects of irrigation, heat and temperature.

“This research will reassure green industry professionals that they can stretch their water budget to successfully cultivate more plants, watering them according to their needs instead of irrigating every plant according to the highest water-using plants,” said Schuch.

Although research is only conducted in the West, the hope is that there will be trials in other regions of U.S.

Doing so would yield comprehensive information about the plants and their performance in different climates. As extreme weather events persist in the U.S., disease pressure and risks do too. Trials throughout the country would provide location-specific data regarding disease susceptibility. 

To learn more about the UCLPIT research project, visit https://ucanr.edu/sites/UCLPIT/

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