News and Campus Briefs
Building better infant formula
Adobe Stock image.
Roughly three in four babies worldwide drink infant formula during the first six months of their life, either as a sole source of nutrition or as a supplement to breastfeeding. But this essential product currently doesn’t replicate the nutritional profile of human breast milk, which contains approximately 200 human milk oligosaccharides (HMOs), prebiotic sugar molecules that help prevent diseases and support the growth of healthy gut bacteria.
Replicating these sugars has been a significant challenge for manufacturers, but new research led by Plant and Microbial Biology professor Patrick Shih may help close that gap. In June, Shih and colleagues reported in Nature Food that their team of scientists from UC Berkeley and UC Davis successfully reprogrammed the sugar-making machinery of Nicotiana benthamiana—a close relative of tobacco—to produce 11 known HMOs and other complex sugars with similar properties.
Commercial HMO production currently relies on microbial fermentation, but that process is only able to produce two to five simple HMOs at a time. “We made all three major groups of HMOs,” explained Shih, the study’s senior author. “To my knowledge, no one has ever demonstrated that you could make all three of these groups simultaneously in a single organism.” Lead author Collin Barnum, a UC Davis graduate student, also created a strain of plants optimized to produce LNFP1, an HMO that is challenging to produce using existing methods.
Shifting to plant-based formula production would likely be more cost-effective and easier to produce at a commercial scale. The breakthrough could also lead to the development of more nutritious nondairy plant milk for adults.
— Kara Manke
Shades of fear and favor
From left: A white fallow deer and a black melanistic squirrel. Adobe Stock images.
Around the world, animals that exhibit rare color morphisms—including lighter colored variants with albinism or leucism and dark-colored variants with melanism—are often the subject of both veneration and fear in humans. A recent study by UC Berkeley wildlife biologists is one of the first to explore how human preference for these unusual color variations impacts how animals are perceived and treated.
For the study, which was published in Human Ecology this spring, the researchers surveyed news articles and scientific publications for observations of animals with novel colorations, noting whether they were treated as nuisances or with adoration and protection.
They found multiple places in the US where it’s illegal to hunt white stags or albino, white-tailed deer, but not melanistic deer. They also found that both white and black squirrels are celebrated and protected in parts of the country. Brevard, North Carolina, is a squirrel sanctuary and hosts a White Squirrel Weekend focused on its leucistic squirrels, and in Olney, Illinois, white squirrels get right-of-way when crossing the street. Kent State University’s annual Black Squirrel Festival celebrates the campus’s black squirrel population, which was imported from Canada in 1961.
While the study found that generally people are more interested in herbivores like deer and squirrels, there were instances of predators benefitting because of their unique color. For example, a black coyote roaming neighborhoods in Atlanta, Georgia—where trapped coyotes are required by law to be euthanized—was instead relocated to a sanctuary.
“Conservation scientists use evidence-based approaches informed by research and literature, but they are still human beings with natural, internalized biases and preferences,” said co-author Tyus Williams, a graduate student in the lab of Assistant Professor Christopher Schell, which focuses on urban wildlife ecology. “Critically examining those feelings can help us better inform policies to effectively look after the animals we’re trying to steward.”
The Ticker
Campus’s brand-new Helen Diller Anchor House, primarily a housing building for UC Berkeley transfer students, opened in August, with a state-of-the art teaching kitchen for Rausser College’s nutritional sciences and dietetics programs.
A study measuring toxic metals in tampons co-authored by postdoctoral researcher Jenni Shearston found arsenic, lead, and other contaminants in the feminine hygiene products.
ESPM Professor Paolo D’Odorico was awarded the Prince Sultan Bin Abdulaziz International Prize for Water, which recognizes cutting-edge innovation in water research.
Camryn Rogers, BS ’22 Society and Environment and Political Economy, won a gold medal for Canada in women’s hammer throw at the Paris Olympics in August.
Hot off the press
Gaslight: The Atlantic Coast Pipeline and the Fight for America’s Energy Future
By Jonathan Mingle, MS ’09 Energy and Resources
Island Press
Independent journalist Jonathan Mingle’s latest book provides a gripping account of the David versus Goliath battle surrounding the Atlantic Coast Pipeline proposed by utility giant Dominion Energy. The book recounts the six-year-long effort of farmers, nurses, scientists, innkeepers, and other rural Virginians to stop the 600-mile-long project. The pipeline’s developers insisted that the pipeline was in the public interest because it would carry natural gas, touted by the industry as a “bridge fuel” to a clean energy future, despite experts’ warnings that it would lock in decades of climate-warming emissions. The grassroots coalition persisted against Dominion’s deep pockets and unparalleled influence over lawmakers and regulators. Eventually they won: Dominion sold most of its gas assets and pivoted to building the country’s largest offshore wind farm. Mingle’s narrative offers insights into the political influence of the utility and gas industries, the risks posed by continued investment in fossil gas infrastructure, and the power of ordinary citizens to shape the decisions that will determine America’s energy future.
Recycling Class: The Contradictions of Inclusion in Urban Sustainability
By Manisha Anantharaman, PhD ’15 Environmental Science, Policy, and Management
MIT Press
In Recycling Class, Manisha Anantharaman grapples with the complexities of pursuing sustainability in a deeply unequal and exploitative world through a ten-year study of garbage politics in Bengaluru, India. Over the past decade, members of the city’s middle class have developed neighborhood groups to support recycling, composting, and zero-waste lifestyles as solutions to the growing crisis of unmanaged waste. The book details how waste pickers—those who make a living by reclaiming value from discards—organized to obtain inclusion into these decentralized systems. Although these “DIY infrastructures” have created economic and political opportunities for waste pickers, these configurations also continue to reproduce class, caste, and gender-based divisions of labor. Ultimately, the book demonstrates that under the logic of neoliberal, racial capitalism, inclusion without social reform can reproduce unjust distributions of risk and responsibility. Anantharaman argues that urban sustainability transitions and circular economy initiatives must repair past harms and confront their gendered and racialized dynamics to avoid perpetuating existing patterns of exploitation and dispossession.
Blazing premiums
Homeowners across the country are scrambling to keep up with rising property insurance prices, and options for insuring homes in disaster-prone areas are dwindling. Many insurers are raising premiums significantly or leaving high-risk markets altogether.
In California, lawmakers are working to reform regulations that were not designed with the pressures of climate change—like wildfire—in mind. California limits how quickly homeowners’ insurers can increase premiums without a costly and time-consuming public hearing. Insurers argue that these regulations limit their ability to raise rates fast enough to keep up with costs. Consumer advocates, however, insist these guardrails are needed to ensure fair and affordable pricing.
Adobe Stock image.
A recent National Bureau of Economic Research working paper co-authored by Meredith Fowlie, a professor of agricultural and resource economics, explores the relationship between wildfire risk and insurance prices in the state. The study found that California insurers take very different approaches to pricing wildfire risk and setting homeowners insurance premiums: some look only as far as zip codes to assess wildfire risk exposure, while others use much more granular data.
According to the authors, this finding has two important—and related—implications for California homeowners. First, companies with less granular information price insurance premiums higher because they are worried about “winning” higher-risk homes. Second, insurance availability can decline if companies with less detailed information want to raise premiums but run up against California’s rate increase regulation and instead pull out of high-risk areas altogether.
“There is a very high-stakes conversation right now about regulatory reform,” said Fowlie. “Our work suggests that making it easier for all firms in the market to access more granular, more sophisticated wildfire risk estimates could help improve both the availability and affordability of insurance.”
— Kara Manke