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Associate Professor, Urban and Community Horticulture Extension, Statewide Master Gardener Program Coordinator
The ecology of urban and suburban landscapes remains relatively unexplored - although such habitats have great potential to positively contribute to the conservation of pollinators, parasitoids and the ecosystem services that they confer.
Working with the OSU Extension Master Gardeners, state and local agencies, as well as non-profits and other non-governmental organizations, I am helping to develop a better research-based understanding of how to design and sustainably manage gardens and parks to maximize ecosystem services. My Extension and Outreach efforts are focused on communicating these and other research-backed management practices to home gardeners, commercial landscapers, and others.
Department of Horticulture
4017 Ag and Life Sciences BldgCorvallis, OR 97331-7304
My overall research interests are in developing a better understanding of how gardens and greenspaces can be designed and managed so that they contribute to rather than detract from ecosystem services. I am particularly interested in the services of pollination and biological control in gardens and other greenspaces.
I have broad interests in the community ecology of insects, and have previously studied: cannibalism in wolf spiders, facultative hyperparasitism in parasitoid wasps and the use of stable isotopes to infer arthropod community interactions. Currently, my research focuses on investigations into the potential of developed landscapes (i.e. urbanized areas) to conserve beneficial insects, such as pollinators and natural enemies. In addition, I am interested in quantifying the ecosystem services of pollination and biological control within urban areas. The success of these investigations hinges on the support and active involvement of various stakeholders, such as private homeowners and nursery/landscape professionals. Thus, outreach, extension and education are inherently coupled with my research program.
The Potential for Pollinator Conservatories within Developed Landscapes
Due to the decline of the European honey bee, coupled with an increased awareness of the utility and necessity of alternative pollinators in agricultural and natural systems, several federal and non-profit organizations promote the protection of native pollinators and the ecosystem service of pollination that they provide. The importance of private homeowners and nursery/landscape professionals to the conservation of insect pollinators is recognized by non-profit organizations such as the Xerxes Society and federal agencies such as EPA and USDA. All of these agencies have highlighted the contributions that private individuals and the landscaping industry can make to pollinator conservation efforts. Given that much of the land in the United States is privately owned, it is wise to consider the role that the general public can play in conserving ecosystem services.
That ecosystem services can be conserved in developed landscapes may seem counterintuitive, since the prevalence of suburban and urban neighborhoods in many areas of the United States has generally had adverse affects on biodiversity. However, the proliferation of ornamental, flowering plants within urban/suburban gardens and parks suggests that these habitats may provide beneficial resources to native pollinators. A diversity of nectar-producing flowering plants can be found in many urban gardens and parks. The abundance and diversity of these plants may promote a diverse and abundant pollinator assemblage. Furthermore, urban planners may be able to contribute to the conservation of insect pollinators by incorporating more greenspace (i.e. urban parks and gardens) into developed landscapes. Because many bees nest in the ground or in cavities, such as hollow twigs and stems, an increase in greenspace may increase nest site availability for bees.
Ultimately, it is my intention to pursue a greater understanding of how developed landscapes may influence the ecosystem service of pollination. A more abundant and diverse pollinator community in the local area of a garden doesn’t necessarily translate into increased fruit/vegetable yield in gardens and improved native plant fitness in the vicinity of gardens. In fact, the extreme diversity of plants grown in gardens and parks may dilute the visitation of insect pollinators to plants that are grown by gardeners for the fruits and vegetables that they yield. Future research will focus on developing an understanding of how different garden configurations may impact fruit/vegetable yield, and how gardens may impact the fitness of native plants in adjacent habitats.
I was born in Baltimore, MD, and spent the first 30 years of my life living within a 40 mile radius of where I was born. Although I did not have the opportunity to hike pristine habitats or to meaningfully explore natural areas, I fell in love with ecology (specifically, insect ecology) during my time as an undergraduate and graduate student.
Although my graduate and post-doctoral work was conducted in natural (e.g. forests, salt marshes, grasslands) or agricultural (e.g. cotton, papaya) areas - my first job was at a University in the south Bronx. Knowing that natural or agricultural field sites would be difficult to find - I quickly reconnected with my love for cities, and began to study the ecology of pollinators in urban community gardens.
2002 Ph.D., Entomology, University of Maryland College Park (Advisor: Dr. Robert Denno)
1996 M.S., Entomology, University of Maryland College Park (Advisor: Dr. Robert Denno)
1993 B.S., Biology, University of Maryland Baltimore County
- 2007-Present. Assistant Professor and State Program Leader, Oregon Master Gardener Program. Department of Horticulture, Oregon State University
- 2003-2007. Assistant Professor. Department of Biological Sciences, Fordham University
- 2004-2006. Co-Principle Investigator. Baltimore Ecosystem Study
- 2002-2003. Post-Doctoral Research Associate. Department of Entomology, University of California Davis (Supervisor: Dr. Jay Rosenheim)
- 2000-2001. Coordinator. University Teaching and Learning Program, Center for Teaching Excellence, University of Maryland
- 2001-2002. Gahan Fellow. Department of Entomology, University of Maryland
- 1994-2000. Graduate Teaching Assistant. University of Maryland
- American Society Horticultural Science
- Entomological Society of America
I accept graduate students for Horticulture
Outreach and Extension
My current work within extension focuses on developing solid, mutually-beneficial relationships between Oregon State University and (1) Master GardenersTM, (2) private homeowners and (3) landscape and nursery professionals within the state of Oregon.
Specifically, my work in extension recognizes that Oregon, like many other areas of the United States and the world, is becoming more urbanized. For example, the US Census Bureau estimates that the population of Oregon has increased 8.2% from 2000 to 2006. As previously rural or unmanaged lands become more developed, and as more individuals and households share land area, Oregon State University is well-situated to work with the Oregon Master GardenersTM (and other organizations and individuals) to educate the public about sustainable land management practices, and to further research on the sustainable use of private lands.
Recent Research Publications
Langellotto, G. A. and A. Gupta*. 2012. Gardening increases vegetable consumption in school-aged children: a meta-analytical synthesis. HortTechnology. 22: 430-445.
Matteson, K. C.* and G. A. Langellotto. 2012. Evaluating community gardens as habitat for an urban butterfly.Cities and the Environment. Vol. 5: Iss. 1, Article 10.Available at: Available at: http://digitalcommons.lmu.edu/cate/vol5/iss1/10
Schaumburg, K., W. M. Giuliano and G. A. Langellotto. 2011. Avian-habitat relationships in urban and suburban tidal marshes of Connecticut. Urban Habitats. 6: http://www.urbanhabitats.org/v06n01/avian_full.html
Langellotto-Rhodaback, G. A. 2010. Enrollment, retention and activity in an online Master Gardener Course. Journal of Extension [On-line] 48(4) Article 4RIB3. Available at: http://www.joe.org/joe/2010august/rb3.php
Matteson, K. C. and G. A. Langellotto. 2009. Bumble bee abundance in New York City community gardens: implications for urban agriculture. Cities and the Environment. 2(1):article 5, 12 pp.http://digitalcommons.lmu.edu/cate/vol2/iss1/5/ .
Werrell, P.A., G. A. Langellotto, S. U. Morath and K. C. Matteson. 2009. The Influence of Garden Size and Floral Cover on Pollen Deposition in Urban Community Gardens. Cities and the Environment. 2(1):article 6, 16 pp.
Fetridge, E., J. S. Ascher and G. A. Langellotto. 2008. The bee fauna of residential gardens in a suburb of New York City (Hymenoptera: Apoidea). Annals of the Entomological Society of America. 101: 1067-1077.
Matteson, K. C., J. S. Ascher and G. A. Langellotto. 2008. Richness and composition of the bee fauna of urban gardens in New York City (Hymenoptera: Apoidea). Annals of the Entomological Society of America. 101: 140-150.
Extension Publications: Peer Reviewed
Miller, W, B. Halverson and G. Langellotto. 2011. An Educator’s Guide to Vegetable Gardening. Extension Publication EM 9032.
Dreves, Amy J. and G. A. Langellotto-Rhodaback. 2011. Protecting Garden Fruits from Spotted Wing Drosophila (Drosophila suzukii). Extension Publication EM 9026-E.
Punches, John and Gail Langellotto-Rhodaback. 2010. Master Gardeners and the Creation of Extension Service Districts. Oregon State University Extension Service. 4 pages. http://extension.oregonstate.edu/sites/default/files/for-employees/government-relations/service-districts/master_gardener-service_district.pdf
I love all insects, with the exception of tabanid flies.