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GAINESVILLE, Fla. — Heat from city sidewalks, streets, and parking lots, along with insect pests, can damage trees planted in urban landscapes. Thus, it is critical to plant trees in the right places so they will do well in harsh urban environments, a University of Florida Institute of Food and Agricultural Sciences researcher says.
More than half the world’s people and 80 percent of the U.S. population live in urban areas. Trees benefit these residents by filtering the air, reducing temperatures and beautifying landscapes. According to a new study led by Adam Dale, a UF/IFAS assistant professor of entomology, these benefits are reduced when trees are planted in unsuitable urban landscapes. However, guidelines can be developed to lead urban tree- planting decisions in a more sustainable direction.
Dale spearheaded the study while at North Carolina State University in Raleigh, North Carolina. Previous research by Dale and his colleagues found that impervious surfaces raise temperatures, which increase pest abundance and tree stress, ultimately reducing tree health. He and his team examined the so-called “gloomy scale insect,” which feeds on tree sap and appears as small bumps on the bark of trees.
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GAINESVILLE, Fla. — Not all fungal infections are bad for plants—in fact, some of them are critical for plant survival, according University of Florida Institute of Food and Agricultural Sciences researchers.
The UF/IFAS Applications and Analyses of Mycorrhizal Associations course teaches participants how to harness the power of these beneficial fungi. Andy Ogram, professor of soil and water sciences, and Abid Al Agely, senior biological scientist, co-founded the course.
Mycorrhizal fungi live in the soil and have a symbiotic relationship with plants. “The fungi actually function like part of the root systems,” and can be cooperative with 90 percent of plants, said Ogram. This mutually beneficial relationship is called a mycorrhizal association and is technically an infection, though a positive one.
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GAINESVILLE, Fla. — A University of Florida Institute of Food and Agricultural Sciences researcher wants to help you engage your neighbors to conserve urban biodiversity.
Mark Hostetler, a UF/IFAS professor of wildlife ecology and conservation, sees educational signs in neighborhoods as a way to nudge people to change their landscape practices, among other activities.
“Such signs can help homeowners understand ways to manage their homes, yards and neighborhoods in a more sustainable way,” Hostetler said.
GAINESVILLE, Fla. — What economists call the “green industry” – nursery and greenhouse production, landscape services and horticultural product distribution − is bringing plenty of green to a lot of people across the country. A new study by the University of Florida Institute of Food and Agricultural Sciences shows that the industry generated $196 billion in revenues annually, and more than two million jobs in the United States.
“Our study demonstrated that this industry is a very large employer,” said Alan Hodges, Extension scientist with the UF/IFAS food and resource economics department and lead author of the study. “It exists in virtually every community in the U.S. The rise of large retail chain stores with garden departments has made plants and other horticultural products more readily available to consumers than ever before.”
Green industry products include sod, flowers, bedding plants, tropical foliage, trees and shrubs, among other types of plants. The industry also includes many businesses that provide services such as landscape design, installation and maintenance, plus firms — such as lawn and garden stores — for wholesale and retail distribution of horticultural products, Hodges said.
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GAINESVILLE, Fla. — Climate change is rapidly warming lakes around the world, threatening freshwater supplies and ecosystems, according to a new study spanning six continents.
More than 60 scientists took part in the research, published in the journal Geophysical Research Letters and announced today at the fall meeting of the American Geophysical Union in San Francisco. The study authors include Karl Havens, director of the Florida Sea Grant program and a professor with the University of Florida Institute of Food and Agricultural Sciences.
The full study, titled, “Rapid and highly variable warming of lake surface waters around the globe,” is available free of charge here, or at the following link: http://onlinelibrary.wiley.com/doi/10.1002/2015GL066235/full.
The study showed that lakes are warming an average of 0.6 degrees Fahrenheit each decade. That’s greater than the warming rate of either the oceans or the atmosphere, and it could have profound effects, scientists say.
At the current rate, algal blooms, which can ultimately rob water of oxygen, are projected to increase 20 percent in lakes over the next century. Algal blooms that are toxic to fish and other animals would increase by 5 percent. And these rates imply that emissions of methane, a greenhouse gas with 25 times the heat-trapping capacity of carbon dioxide, will increase 4 percent over the next decade.
“Lakes are critically important to people, because they are sources of drinking water, irrigation water and fisheries,” said Havens, an ecologist with the UF/IFAS School of Forest Resources and Conservation. (more …)
GAINESVILLE, Fla. — The next time a storm tears up your yard, let an expert assess the damage to any trees. A study from the University of Florida Institute of Food and Agricultural Sciences shows that homeowners perceive the risk of a damaged tree differently than trained professionals.
The survey of tree experts and homeowners in the Tampa Bay area assessed the perceptions of both groups when it came to assessing tree damage, said Andrew Koeser, an assistant professor in environmental horticulture and study author.
“While there are a number of factors tied to tree risk, most respondents were fixated on tree defects,” Koeser said. “Only experienced professionals considered other pertinent factors—namely whether the tree was actually a threat to a person, vehicle or house.”
GAINESVILLE, Fla. — You can take the “interim” off of Sandra Wilson’s title. She’s now chair of the UF/IFAS Department of Environmental Horticulture.
Named interim chair in November 2014, Wilson was named to the permanent position in September by Jack Payne, UF senior vice president for agriculture and natural resources.
“Dr. Wilson was a natural choice to lead our Environmental Horticulture Department,” Payne said. “Combine her outstanding teaching and research record, the leadership she has shown and the fact that the faculty support her, and we knew right away Dr. Wilson would lead the department to unparalleled heights.”
Wilson came to Gainesville after 15 years as an environmental horticulture faculty member at the UF/IFAS Indian River Research and Education Center.
GAINESVILLE, Fla. — A UF/IFAS scientist, who has helped design a tree risk-management app and is co-writing tree identification books, has been named as a co-recipient of the International Society of Arboriculture’s Early Career Scientist Award.
The award is given to professionals showing exceptional promise in arboriculture research.
Andrew Koeser, an assistant professor in environment horticulture at the UF/IFAS Gulf Coast Research and Education Center in Baum, is also a faculty member at the UF/IFAS Center for Landscape Conservation and Ecology.
One of Koeser’s projects is a mobile app for risk-assessment data collection and mapping. He is also co-writing a series of tree identification books unique to the different regions of Florida.
Koeser hopes his research enhances efforts to improve risk-assessment and storm response processes. The app project is designed to give cities an easy and efficient means of taking inventory and assessing the safety of their trees. Should a severe storm hit, the data collected will help managers more quickly estimate debris levels for cleanup.
“My research in tree risk assessment carries on the goal of enhancing current efforts being made to improve assessment processes,” said Koeser, a faculty member with the University of Florida Institute of Food and Agricultural Sciences. “I think the app project has the potential to gather user data needed in order to make reasonable assessments of potential tree failure.”
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GAINESVILLE, Fla. — All it takes is six questions. You answer those, and University of Florida researchers say contractors will know how willing you are to upgrade your home for energy efficiency and whether you can afford the improvements.
Heating and cooling make up 54 percent of American households’ utility bills, a primary concern for Randy Cantrell, a UF/IFAS assistant professor and Extension specialist in housing and community development. For some people, their monthly energy bill comes as sticker shock. But we all react differently when we open the envelope, and Cantrell calls that response “botheredness.”
Cantrell wanted to know two things: how bothered people are by their energy bill and whether they can afford to do something about it. So he and Brad Sewell, a graduate research assistant, used a web-based survey of about 1,000 American homeowners to divide them into groups based on utility bill botheredness and budgetary constraints for household upgrades.
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GAINESVILLE, Fla. — Looking to save money and water when you irrigate? UF/IFAS scientists have developed an app for that. Want to know what plants to grow in your garden? You guessed it: UF/IFAS has an app for that as well.
UF/IFAS’ so-called “smart irrigation apps” include an urban lawn app that estimates how long you’ll need to water your lawn to meet current plant water demand. It uses a simplified approach for automated irrigation systems. This urban lawn model uses meteorological data to compute a simple, real-time weekly water balance, said Kati Migliaccio, UF/IFAS associate professor in agricultural and biological engineering and lead designer of the app. Find these apps and others at Smartirrigationapps.org.
“The turf app provides a free resource to determine a schedule to apply the right amount of water to landscapes, which is personalized based on user inputs,” Migliaccio said.