Learning by Leading Students Crucial to New Initiatives

In 2014-15, our staff was fortunate to mentor 12 student employees and 36 undergraduate interns through the UC Davis Arboretum and Public Garden’s Learning by Leading program. As we continue to grow, Learning by Leading student teams are crucial to our new initiatives—providing countless hours, creative energy, and passion for designing and leading new projects. Here are some of their amazing accomplishments:

Arboretum GATEways Outreach Interns

Photo of Arboretum GATEway Outreach Interns

Arboretum GATEways Outreach Interns launched a brand new education team this year. Their outreach activities helped to engage and educate the public in sustainability principles.

Student coordinator, Alex Stubblefield, and staff mentor, Melissa Cruz, helped to launch a brand new education team this year—the Arboretum GATEways Outreach Program. Focused on sharing the riches of the new Arboretum GATEway Garden, six student interns, along with high school students and community volunteers, designed year-round, weekend “Drop-In Days” to help engage public audiences in sustainability principles. The students also teamed with professors from the UC Davis School of Education and conducted activities at community and campus events, such as a local science fair and Picnic Day.

Sustainable Gardening Interns

Photo of UC Davis Arboretum and Public Garden Sustainable Gardening Interns

This year our Sustainable Gardening Interns planted an environmentally-critical new landscape surrounding a new parking lot in the campus’s Health Sciences District. These students developed invaluable skills in landscape water conservation and environmental design.

A team of six Sustainable Gardening Interns were critical to establishing our newest gardens at the Arboretum’s West End Initiative Zone. Mentored by GATEways Horticulturist, Ryan Deering, the students gained real-world training as California’s historic drought places additional pressures on our landscapes. Working as a team to plant natives and Arboretum All-Stars, install and monitor irrigation, and design for pollinator habitat, these students developed invaluable skills in water conservation and environmental design.



Nursery and Propagation Interns and Student Employees

Photo of UC Davis Arboretum and Public Garden Nursery and Propagation Interns and Student Employees

Nursery and Propagation Interns and Student Employees at one of our popular spring plant sales.

Students in the Arboretum Teaching Nursery were instrumental to this year’s record-breaking plant sales. Nursery Manager, Taylor Lewis, mentored 13 interns and three student employees and together, they grew over 6,000 low-water use plants for sale, and helped to keep operations running smoothly for our many volunteer teams, planting projects, and plant sale preparations.



Sustainable Horticulture Student Employees

Photo of Carli Hambley, UC Davis Arboretum and Public Garden SUstainable Horticulture Employhee

Fueled by their high degree of initiative, advanced skill sets, and leadership abilities, our six Sustainable Horticulture student employees were crucial to the maintenance and development of our demonstration gardens throughout the Arboretum and Public Garden.

Sustainable Horticulture Student Employee and Edible Landscape Coordinator, Carli Hambley (shown left), designed and managed two community-based garden sites on campus, and spear-headed a larger team to create a food recovery program from campus fields for donation to local food banks.

READ MORE:Testimonial from Jonathan Su


Arboretum Ambassadors

Photo of UC Davis Arboretum and Public Garden Ambassadors.

This year our Arboretum Ambassadors won the UC Davis Community Service Gold Award and President Obama’s Silver Service Award for 1,800 hours of service. Here they celebrate winning first place for their float in the campus’s annual Picnic Day parade.

Under the mentorship of Elaine Fingerett, this year’s 12 environmental leadership interns enlivened the gardens with free, family-friendly museum programs as well as fun public events such as yoga classes and musical performances. The Ambassadors won the UC Davis Community Service Gold Award and a Presidents Service Silver Award for 1,800 hours of service.


Halloween comes early for Arboretum oaks

Photo of entomology student Laurie Casebier with insect aspirator and mobile laboratory.

Laurie Casebier, undergraduate entomology student, demonstrates using her insect aspirator. She uses this device to document the type and location of wasps she finds during her study.

If you’ve strolled through the Arboretum lately then you’ve probably noticed intermittent ghost-like gloves covering the tips of oak tree branches. No, those are not DIY tree decorations; they are wasp collection receptacles and all are a part of an independent study project being conducted by undergraduate entomology major Laurie Casebier in collaboration with UC Davis’ Bohart Museum of Entomology.

Casebier, who cannot remember a time she wasn’t fascinated with insects, is studying Neuroterus saltatorious, also known as California jumping gall wasp. She travels around the Arboretum courtesy of her mobile laboratory—a large tricycle complete with a trunk of insect-catching goodies—which supplies her tools for inspecting, collecting and recording her findings.

“When female California jumping gall wasps lay eggs on oak leaves, a gall forms and provides the egg moisture, food and cover—among other things—until it is ready to emerge as a fully grown adult,” explains Casebier. “However what also often happens is that other wasps use this gall to deposit their own eggs. The larva(e) from these eggs then parasitize (kill) the gall maker’s larva(e).  Which species parasitize the galls and when? We’re not really sure.”

The outcome of what Casebier is attempting to provide is a chronological story for what wasps parasitize the California jumping gall wasp and when. So, for hours every week she gathers the wasps that hatch from the branches she has bagged, then she identifies and documents them. Sound dangerous? Not really.

“These aren’t the wasps we are used to ruining our picnics,” jokes Casebier. “These wasps are incredibly small, even smaller than fleas. If you ever were stung by one of these wasps, you’d never know it.”

Photo of white organza insect gathering bags on oak trees in the UC Davis Arboretum.

White organza bags cover the tips of oak trees intermittently throughout the Arboretum. The contents of these bags are documented by Casebier for her gall wasp study.

Laurie gathers them by sucking (yes sucking) them from her aspirator—the stethoscope-like object she keeps around her neck—and depositing them into a glass canister. The empty galls that fall from the leaves and get caught in her organza-like collection bags are also separated and kept in case something unexpected should emerge at a later date.

Photo of gall that is the subject of UC Davis undergraduate entomology student's study.

Casebier points to a gall formed by the California jumping gall wasp. This type of gall is not the apple-sized variety and is usually  found only on the underside of leaves.

“Who knows? There could be anunexpected type of wasp or even another species that emerges from these galls,” claims Casebier. “There’s so much to learn from insects, their relationships with each other, and us. Every single tree is home to thousands of tiny tenants, each of which is intricately involved in supporting a role in our environment.”

Casebier’s energy and enthusiasm for her studies are inspiring. Despite the hours of field work involved in her research she enjoys the interaction she has with the public while making her collection rounds.

“Every time I’m out I spend at least an hour sharing what I’m doing with passersby,” explains Casebier. “Most had no idea what galls were or that there were so many types of wasps! I’m so lucky to be able to engage and share what I’m doing with the community and that I have access to such a well-loved and cared for living laboratory in my backyard.”

Although the eggs of the wasps Casebier is studying do not adversely affect the health of these trees, some galls do. Casebier hopes that her project will one day be part of a larger understanding of how wasps and their galls impact tree health.

When not gathering research subjects in the Arboretum, Casebier can be found at the Bohart Museum of Entomology working with her advisors Lynn Kimsey, museum director and Steve Heydon, curator and collections manager, or at one of the many free educational programs offered by the Arboretum.

The Arboretum, as well as other campus landscapes, are consistently in use by our community of faculty, staff, and students for everything from research to recreation. For more information, visit http://arboretum.ucdavis.edu/education_and_research.aspx.


Student testimonial: Jonathan L. Su

Photo of Jonathan Su, student from the UC Davis Arboretum and Public Garden's Learning by Leading Center for the Environment

Jonathan L. Su, Arboretum Ambassador and student employee with the UC Davis Arboretum and Public Garden

“A landscape architect designs experiences for people through the use of physical and natural materials in a space. As a student in landscape architecture, I really wanted to know who these people were and the different materials they used in crafting experiences in space. The UC Davis Arboretum and Public Garden  provided the perfect place for me to work with the Davis community and plants from around the world, in a realistic and ever-expanding setting. Volunteering, interning, and working with the Arboretum and Public Garden turned out better than I could ever imagine.

In the Arboretum Ambassador program, I worked with other ambassadors to creatively use the arboretum space to educate and engage community members ranging from university students to families. From there, I joined the staff. None of my college experiences can really compare to being hired as a landscape assistant with the Arboretum. I developed a pretty intimate understanding of the materials by working with them in the blazing, dry summers months and cloudy, wet winter months of the year.

Although the Arboretum is full of beautiful plants, the most colorful part of the arboretum were the staff and volunteers I worked with every day. From the beginning, I was introduced to passionate, professional individuals who were a huge pleasure to work with and learn from. I found this community of people invested in both my professional and personal growth. They helped me better understand the type of leader I was and supported me at times when life proved particularly difficult.  This community of people helped me to acknowledge my potential and gave me opportunities to recognize it for myself.

Working in the Arboretum helped me understand that although I can’t do everything, I have developed the tools and confidence to give it a try in my own way. I am so grateful for the opportunity to have worked in the UC Davis Arboretum during my time in Davis. Although I will always cherish my experiences and everything I learned about horticulture and community engagement, most importantly I will cherish how much I have learned about and developed myself along the way.”

Jonathan L. Su
Arboretum Ambassador and student employee
UC Davis Arboretum and Public Garden
Landscape Architecture + Environmental Design, B.S. 2015

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