- Author: Saoimanu Sope
Nearly 200 residents trained in past seven years by program, a part of UC Environmental Stewards
On one of her darkest days, Tammah Watts stood in front of her kitchen sink to fill a pitcher of water. Outside of her window, the San Marcos resident noticed a flutter in the distance. She spotted a small yellow bird emerge from the tree and her eyes grew in admiration.
Bird-watching from her kitchen window became an escape for Watts while she was temporarily homebound after a surgery. It's where she found connection beyond the interior space of her home.
“I started noticing other birds that had always been there. The yard didn't change, but my mind and my perspective did,” she said.
Eager to learn more and expose others to her new hobby and its healing power, Watts joined the University of California Environmental Stewards program, a statewide program housed under UC Agriculture and Natural Resources, to become a certified California Naturalist.
The program offers two environmental education certification courses: the California Naturalist course, which introduces people to the wonders of California's unique ecology and engages the public in the study and stewardship of the state's natural communities, and a separate Climate Stewards course.
One of the many strengths of the program is that it allows people from diverse backgrounds to find common ground in nature even if how they became interested varies, said Eliot Freutel, a community education specialist for the UC Environmental Stewards program in Southern California.
“Our partners that help us administer the course are organizations that already have access to the public and provide informal science education, such as natural history museums or Audubon societies,” Freutel added.
Welcoming a new cohort of environmental stewards
In early March, the longest-standing California Naturalist course in San Diego County graduated 25 new members, Watts being one of them, under Karen Merrill and Paige DeCino's instruction. For seven years, Merrill and DeCino have served as co-instructors at the Buena Vista Audubon Nature Center in Oceanside and graduated 166 members prior to their most recent and final class.
Transitioning into retirement, DeCino and Merrill reflected on their seven years of service and are proud to see younger and more diverse faces join the California Naturalist program. Tucker Shelton, who recently graduated alongside his mom, is among the few young people who have joined the program over the years. A love for nature began when Shelton discovered tide pools when he was just a boy. At 14 years old, Shelton wants to inspire a generation of youth with a passion and care for nature.
“When you're younger and your brain is still developing, you're the most interested in new things. If you find a passion at a young age, you'll most likely grow up with it becoming a part of you,” said Tucker, whose capstone project focuses on an essay about the endangered Townsend's big-eared bat and uses stamp art to raise awareness. His art will be featured and sold at an upcoming exhibit and all proceeds will be donated to the Volcan Mountain Wilderness Preserve in Julian.
Hannah Marquez, another recent graduate, was born and raised in San Diego. She values its cultural diversity and believes connecting the public to nature begins with language. In working with Tecolote Canyon Natural Park and Nature Center in Mission Valley to establish an updated native plant library, Marquez is providing relevant information and resources in English and Spanish.
“A lot of people aren't comfortable using technology, and relying on Google Translate isn't going to cut it,” said Marquez, adding that her parents' limited English inspired this project.
Marquez hopes to interest more people in growing native plants in their backyard and believes accessible information is the first step to doing so.
“This has been so rewarding for us,” said Merrill. “Typically, our students are already involved in the community, but for those who aren't, it's amazing to see them become a part of the community and engage in a way that they haven't before.”
DeCino agreed and said that she really hopes to find new instructors to keep the momentum of California Naturalists in San Diego County alive. “Even though we're retiring, we'll still be around here and there, but its important to us that we pass the torch,” DeCino said.
The future of California Naturalists in San Diego County
What's next for San Diego County, you ask?
“We definitely want to expand in the area. But right now, we're looking for alums who are interested in taking over the program held at Buena Vista Audubon Nature Center,” Freutel said. “I'm also hoping to secure more partnerships throughout San Diego County so that the course is offered in various places, not just North County, which can lead to accessibility concerns.”
Like other students, Marquez commuted an hour, each way, to participate in the UC Environmental Stewards program. “It's a worthwhile course, one that helps people have a positive impact in their own community,” said Freutel.
For Watts, helping people find healing and connection to the world around them – an experience her book, a guide to the powerful healing of bird-watching, discusses – is a priority. “It's not just about watching birds,” she said. “It's about noticing the tree the bird lives in, and the ground the tree is growing in.”
During a nature walk that Watts led for a group of kids, she noticed two sets of footprints in the dirt. Immediately, she could differentiate the two. “One belonged to a raccoon and the other belonged to a deer,” Watts said. “I was so excited that I could tell them apart, and I promise I didn't know this before taking the CalNat course.”
To learn how you can join the UC Environmental Stewards program and become a California Naturalist or Climate Steward, visit: https://calnat.ucanr.edu/Take_a_class/
/h3>- Author: Mary Burich, CLEAR Center
Are cattle a secret weapon for taking on California wildfires?
California's cattle ranchers contribute a significant amount to the region's culture, economy and food supply, but do they also inadvertently help to temper the wildfires that have been plaguing the state? And if so, is it a better alternative – environmentally speaking – to letting grasslands burn?
A new study published in the journal Sustainability delves into the topic, weighing the advantages – and disadvantages – grazing cattle bring to the table. Researchers, including scientists from University of California, Davis and UC Agriculture and Natural Resources, set out to calculate the greenhouse gas emissions of cows consuming vegetation that would otherwise burn in wildfires. Then they estimated the GHG emissions that would result should that forage be untouched and therefore, consumed by fire, eventually comparing the two.
Feeling the burn
Given the severity of California's recent wildfires and the belief they will continue and even escalate in the near future, it's a discussion worth having, said Frank Mitloehner, an expert in animal agriculture and air quality from UC Davis, director of the CLEAR Center and one of the researchers who contributed to the peer-reviewed article.
“Each year from 2010 to 2020, California lost on average 89,000 acres of grassland to wildfires,” said Mitloehner, who is also a Cooperative Extension specialist. “In addition to the obvious disruption and devastation they caused, the fires spewed greenhouse gases and harmful particulate matter such as black carbon into the air and into our atmosphere. Those alone threaten climate health and human well-being.”
A fast and furious gas
Cattle are adept at eliminating herbaceous fuel as they graze. However, at the same time, their specialized digestive system produces methane that is expelled most often in the form of enteric emissions … more commonly known as belches. By way of background, methane is a potent greenhouse gas that warms the atmosphere at 25 times the rate of carbon dioxide over 100 years. But it's only in the atmosphere for 10 to 12 years after it's emitted. Following that, it's broken down into carbon dioxide and water vapor.
For that reason, Mitloehner refers to methane as a “fast and furious” gas. Furious because it warms with a vengeance and fast because it does so for only a short time, especially when compared to carbon dioxide. Furthermore, because of the biogenic carbon cycle, whereby plants extract carbon dioxide from the atmosphere for photosynthesis, the warming of methane and its byproducts can end entirely when it's hydrolyzed and used by plants.
How researchers calculated emissions
In order to determine if grazing, methane-emitting cattle are better for the atmosphere than burning grasslands, Mitloehner and the other researchers employed a method known as “Monte Carlo simulation,” a mathematical technique used by scientists to predict outcomes of an uncertain event.
Looking exclusively at methane emissions, they found it's better to have cows eat vegetation than to have wildfires burn it. Granted, it's only marginally better, but when one considers other advantages of animal agriculture and conversely, other disadvantages of widespread, uncontrolled fire, the conversation suddenly shifts.
“Even if cattle provided no other benefit to us, which certainly is not true, we can now make the case that they are helpful to us in yet another way,” Mitloehner said.
Friends or foes?
It goes without saying that one would be hard pressed to find much good to say about wildfires, but that doesn't hold true for animal agriculture. The industry provides jobs and supports the economy in other ways as well. Plus, it is a major source of protein-rich food that is in increasing demand as the world's population continues on a trajectory toward 10 billion people by the year 2050.
Where global warming is concerned, the industry is in the unique position of being able to reach net-zero warming, also known as climate neutrality, if it continues to aggressively chip away at its methane emissions, which Mitloehner asserts is of critical importance to the planet. “Few other sectors can reduce its warming to net zero and still be of service to society, but agriculture can because of the way methane behaves in the atmosphere,” he said.
To be clear, grazing cows are no match for wildfires. Yet, in addition to everything else the sector does for us, slowing the burn and keeping relatively more methane from entering the atmosphere are not nothing.
In addition to Mitloehner, authors of the study are Cooperative Extension advisors Sheila Barry, Devii Rao and Theresa Becchetti; Rowan Peterson, Ermias Kebreab and Minju Jung of UC Davis; and Felix Ratcliff and Kaveh Motamed of LD Ford.
This article was first published on the website of the CLEAR (Clarity and Leadership for Environmental Awareness and Research) Center at UC Davis.
/h3>/h3>/h3>/h3>/h3>- Author: Trina Kleist, UC Davis
One more reason to adopt sustainable cultivation
California wheat farmers could both maintain their yields and improve soil health by growing annual wheat without tilling the soil year after year.
This could be one more encouragement to farmers to adopt a sustainable practice commonly called conservation tillage, no-till or minimum-till cultivation, impacting how we grow a grain that supplies about 20 percent of the calories and protein for people around the world.
A new study, by a team led by Mark Lundy, University of California Cooperative Extension specialist in UC Davis' Department of Plant Sciences, offers new insight for decades-long discussions around soil conservation, sustainable agriculture and climate-warming emissions related to growing our food. The study has been published in the journal Soil and Tillage Research. For the first time, researchers have shown that annual wheat that is not tilled each year is better for stashing carbon in the soil than perennial wheatgrass, while still yielding more crop in Central California.
Previous studies have looked at annual wheat that is tilled each year, annual wheat that is not tilled, and a cousin species, perennial intermediate wheatgrass (trademarked Kernza), which also is not tilled. But until now, no one has looked at all of the benefits and trade-offs together. Most importantly, “no one has ever controlled for tillage,” Lundy said. “And, no one has compared annual wheat to perennial intermediate wheatgrass over multiple years in a Mediterranean climate, which is what we have in California.”
This study also is unique because it delves into the deeper question of what is going on in the soil that drives the different results for carbon there. Soil carbon reflects various processes linked to plant activity and soil health. Measuring the different forms of soil carbon may also signal whether a farming system is accumulating carbon in the soil over time – a plus for reducing climate-warming gases in the atmosphere.
“Measuring soil carbon is complex and nuanced,” said Kalyn Taylor, the lead author on the paper. “We started this experiment because we wanted to know whether and how plant activity and tilling or not tilling would affect the carbon story belowground in California's climate.”
“When we started this study, we thought the crop being perennial or annual would drive the differences in carbon storage in the soil,” Lundy added. Specifically, they had expected perennial wheatgrass would lead to more carbon in the soil because of its deeper, better-established root system. “But that's not what we found,” he went on. “What we found was, it was the lack of tillage, plus the level of productivity of common annual wheat, that made the difference in soil carbon here in California.”
Soil carbon in annual vs. perennial grain
In 2017, Lundy, then-graduate-student Taylor, UC Davis Professor Emeritus Kate Scow and others on the team started measuring different forms of soil carbon in test plots at Russell Ranch, west of campus. Plots were planted with annual wheat that was tilled each spring, annual wheat that was not tilled and perennial intermediate wheatgrass (Kernza) that also was not tilled.
Each year, the researchers measured the carbon present in the soil, the amount of soil organisms (which have carbon in their bodies) and the amount of material the plants created.
At the end of three growing seasons, they found that land planted with no-till, common, annual wheat had the highest amount of soil organisms, measured as biomass, of the three treatments.
The researchers also found soil carbon is more likely to remain stable in the no-till, annual plots, compared to both tilled wheat and wheatgrass.
In addition, the no-till, annual wheat produced plant material more consistently than the perennial wheatgrass across the three years, which saw variation in rainfall.
“Overall, annual wheat grown without soil disturbance or tillage had both higher productivity and higher potential for storing carbon in the topsoil than perennial wheatgrass in our Mediterranean climate,” Lundy said.
Related research
“No-till annual wheat increases plant productivity, soil microbial biomass, and soil carbon stabilization relative to intermediate wheatgrass in a Mediterranean climate,” is online now and will be published in the January 2024 edition of Soil and Tillage Research.
The team also found that tilled annual wheat vs. Kernza stores total carbon at different depths in the soil profile and hosts distinct soil fungal communities, primarily in the root zone and topsoil: Taylor, K., Samaddar, S., Schmidt, R., Lundy, M. and Scow, K., 2023. Soil carbon storage and compositional responses of soil microbial communities under perennial grain IWG vs. annual wheat. Soil Biology and Biochemistry, p.109111.
Previous work comparing the perennial grain known as intermediate wheatgrass (trademarked Kernza) to annual wheat had not distinguished the extent to which soil health benefits are a function of the perennial nature of the crop. Read the story here.
This story was originally published on the UC Davis News site.
/h3>/h3>/h3>- Author: Jessica Heath, UC Davis College of Engineering
When flown at the right times, drones can help farmers adapt to a changing climate
Researchers at the University of California, Davis, have developed a web application to help farmers and industry workers use drones and other uncrewed aerial vehicles, or UAVs, to generate the best possible data. By helping farmers use resources more efficiently, this advancement could help them adapt to a world with a changing climate that needs to feed billions.
Associate Professor Alireza Pourreza, director of the UC Davis Digital Agriculture Lab and postdoctoral researcher Hamid Jafarbiglu, who recently completed his doctorate in biological systems engineering under Pourreza, designed the When2Fly app to make drones more proficient and accurate. Specifically, the platform helps drone users avoid glare-like areas called hotspots that can ruin collected data.
Drone users select the date they plan to fly, the type of camera they are using and their location either by selecting a point on a map or by entering coordinates. The app then indicates the best times of that specific day to collect crop data from a drone.
Jafarbiglu and Pourreza, who is also a UC Cooperative Extension specialist of agricultural mechanization, said that using this app for drone imaging and data collection is crucial to improve farming efficiency and mitigate agriculture's carbon footprint. Receiving the best data — like what section of an orchard might need more nitrogen or less water, or what trees are being affected by disease — allows producers to allocate resources more efficiently and effectively.
"In conventional crop management, we manage the entire field uniformly assuming every single plant will produce a uniform amount of yield, and they require a uniform amount of input, which is not an accurate assumption," said Pourreza. "We need to have an insight into our crops' spatial variability to be able to identify and address issues timely and precisely, and drones are these amazing tools that are accessible to growers, but they need to know how to use them properly."
Dispelling the solar noon belief
In 2019, Jafarbiglu was working to extract data from aerial images of walnut and almond orchards and other specialty crops when he realized something was wrong with the data.
"No matter how accurately we calibrated all the data, we were still not getting good results," said Jafarbiglu. "I took this to Alireza, and I said, 'I feel there's something extra in the data that we are not aware of and that we're not compensating for.' I decided to check it all."
Jafarbiglu pored through the 100 terabytes of images collected over three years. He noticed that after the images had been calibrated, there were glaring bright white spots where they were supposed to look flat and uniform.
But it couldn't be a glare because the sun was behind the drone taking the image. So Jafarbiglu reviewed literature going back to the 1980s in search of other examples of this phenomenon. Not only did he find mentions of it, but also that researchers had coined a term for it: hotspot.
A hotspot happens when the sun and UAV are lined up in such a way that the drone is between the viewable area of the camera's lens system and the sun. The drone takes photos of the Earth, and the resulting images have a gradual increase in brightness toward a certain area. That bright point is the hotspot.
The hotspots are a problem, Jafarbiglu said, because when collecting UAV data in agriculture, where a high level of overlap is required, observed differences in the calibrated images need to come solely from plant differences.
For example, every plant may appear in 20 or more images, each from varying view angles. In some images, the plant might be close to the hotspot, while in others it may be situated further away, so the reflectance may vary based on the plant's distance from the hotspot and spatial location in the frame, not based on any of the plant's inherent properties. If all these images are combined into a mosaic and data are extracted, the reliability of the data would be compromised, rendering it useless.
Pourreza and Jafarbiglu found that the hotspots consistently occurred when drones were taking images at solar noon in mid-summer, which many believe is the best time to fly drones. It's an obvious assumption: the sun is at its highest point above the Earth, variations in illumination are minimal, if not steady and fewer shadows are visible in the images. However, sometimes that works against the drone because the sun's geometrical relationship to the Earth varies based on location and the time of year, increasing the chance of having a hotspot inside the image frame when the sun is higher in the sky.
"In high-latitude regions such as Canada, you don't have any problem; you can fly anytime. But then in low-latitude regions such as California, you will have a little bit of a problem because of the sun angle," Pourreza said. "Then as you get closer to the equator, the problem gets bigger and bigger. For example, the best time of flight in Northern California and Southern California will be different. Then you go to summer in Guatemala, and basically, from 10:30 a.m. to almost 2 p.m. you shouldn't fly, depending on the field-oriented control of the camera. It's exactly the opposite of the conventional belief, that everywhere we should fly at solar noon."
Grow technology, nourish the planet
Drones are not the only tools that can make use of this discovery, which was funded by the AI Institute for Next Generation Food Systems. Troy Magney, an assistant professor of plant sciences at UC Davis, mainly uses towers to scan fields and collect plant reflectance data from various viewing angles. He contacted Jafarbiglu after reading his research, published in February in the ISPRS Journal of Photogrammetry and Remote Sensing, because he was seeing a similar issue in the remote sensing of plants and noted that it's often ignored by end users.
"The work that Hamid and Ali have done will be beneficial to a wide range of researchers, both at the tower and the drone scale, and help them to interpret what they are actually seeing, whether it's a change in vegetation or a change in just the angular impact of the signal," he said.
For Pourreza, the When2Fly app represents a major step forward in deploying technology to solve challenges in agriculture, including the ultimate conundrum: feeding a growing population with limited resources.
"California is much more advanced than other states and other countries with technology, but still our agriculture in the Central Valley uses technologies from 30 to 40 years ago," said Pourreza. "My research is focused on sensing, but there are other areas like 5G connectivity and cloud computing to automate the data collection and analytics process and make it real-time. All this data can help growers make informed decisions that can lead to an efficient food production system. When2Fly is an important element of that."
This article was originally published on the UC Davis College of Engineering News page.
/h3>/h3>/h3>- Author: Hanif Houston
Validation of Innovation Program provides supportive ecosystem for startups
The VINE, an initiative by the University of California Agriculture and Natural Resources, is now accepting applications for its VINE Validation of Innovation Program. The program aims to support innovation in the agri-tech sector, particularly in climate-resilient solutions for California food systems.
Made possible with support from a UC Climate Action grant, the program is inviting startups to apply, with a focus on providing comprehensive support for field trials – a critical stage for any agri-tech venture.
"Field trials are vital for validating new innovations in the agri-tech sector,” said Gabe Youtsey, chief innovation officer with UC ANR and founder of The VINE. “The VINE VIP aims to provide a supportive environment for carrying out these essential tests, bridging the gap between innovative concepts and real-world application."
Elif Ceylan, co-founder of OpenGate Partners and head of the VINE VIP, also stressed the importance of field trials.
"Field trials serve as a crucial phase where promising ideas either succeed or require adjustment,” Ceylan said. “We are committed to prioritizing this stage to ensure the effectiveness and relevance of emerging agri-tech solutions."
The VINE VIP offers more than field trials. It provides a supportive ecosystem for startups, including industry connections, access to a broad network of farmers and experts, comprehensive validation results and market entry support. The program is a unique accelerator that pairs startups with project partners in the agri-tech industry, facilitating Proof of Concept projects and commercialization trials for industry-defined challenges in California agriculture.
By connecting startups with farmers, academics and industry experts, the program aims to validate, advance, adopt and amplify innovative technologies, reducing technological risks and accelerating sales through its extensive industry network.
Startups interested in joining the VINE VIP can apply until Sept. 16, 2023. Detailed information about the program and the application process is available on The VINE's website at thevine.io/vip.
The VINE is an initiative of the University of California Agriculture and Natural Resources, dedicated to fostering agriculture, food, and biotech innovation in California. Our mission is to support industries and entrepreneurs while promoting technology innovation and commercialization for sustainable and equitable food systems. We connect entrepreneurs with public and private sector resources, encourage collaborations to address industry challenges, and promote regional capacity for global innovation as an economic opportunity.
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