Posts Tagged: Robbin Thorp
Folks accustomed to seeing only honey bees (which are non-natives) buzzing around their yard probably aren't aware that in the United States alone there are some 4000 identified species of native bees.
And they probably aren't aware of The Bee Course.
That's a workshop offered for conservation biologists, pollination ecologists and other biologists who want to gain greater knowledge of the systematics and biology of bees. It's held annually in Portal, Ariz. in the Chiricahua Mountains at the Southwest Research Station of the American Museum of Natural History (AMNH). This year's dates are Aug. 22-Sept. 1.
Native pollinator specialist Robbin Thorp, emeritus professor of entomology at the University of California, Davis, and active in the Xerces Society, has taught at The Bee Course since 2002.
The course, led by Jerry Rozen of AMNH, has been operating continuously since 1999, Thorp said, and UC Davis graduates are very much involved. Steve Buchmann who received his Ph.D. at UC Davis in 1978, is one of the instructors. Ron McGinley who received his undergraduate degree at UC Davis, does most of the initial student contact and scheduling for the course, Thorp said.
"There are usually about eight instructors and 22 participants for the 10- day course," Thorp said. "Most of the time is spent in the lab identifying bees to genus. At least three days are spent in the field so students can see various bees doing their thing, collect them and bring them back to the lab to ID them. It is a great experience for students to interact with instructors and especially with their peers from round the world."
"Instructors all donate their time to teach in the course, but benefit from the chance to get together with colleagues and a new cohort of interesting students each year. Every class is different--that is, it takes on its own personality--and each student brings something new and different to the mix."
More locally, Thorp will speak Sunday, March 7 on the amazing diversity of native bees at the 2010 Bee Symposium, sponsored by the Santa Rosa-based Partners for Sustainable Pollination (PFSP). He'll discuss their nesting habits and nest site requirements. The symposium takes place from 9 a.m. to 5 p.m. in the Subud Center, 234 Hutchins Ave., Sebastopol.
The fourth annual conference will offer updates and new perspectives on honey bees and native pollinators, according to PFSP executive director Kathy Kellison.
It's good to see the focus on native bees as well as honey bees. For more information on native bees, be sure to check out the Xerces Society Web site and UC Berkeley's Native Bee Gardens.
Yolo County Bee Collection
Metallic Green Sweat Bee
Robbin Thorp's many areas of expertise include the amazing diversity of native bees.
He'll discuss their diversity, nesting habits and nest site requirements when he addresses the 2010 Bee Symposium, sponsored by the Santa Rosa-based Partners for Sustainable Pollination (PFSP).The conference, to take place from 9 a.m. to 5 p.m., Sunday, March 7 in the Subud Center, 234 Hutchins Ave., Sebastopol, will offer updates and new perspectives on honey bees and native pollinators.
Thorp, a native bee specialist and an emeritus professor of entomology at the University of California, Davis, "retired" in 1994, but not really. He still maintains his office at the Harry H. Laidlaw Jr. Honey Bee Research Facility, UC Davis, and continues to focus his research on the ecology, systematics, biodiversity and conservation of bees. He's involved in research on the role of native bees in crop pollination, the role of urban gardens as bee habitat, and declines in native bumble bee populations.
Thorp is known as the "go-to" person when it comes to native bee identification. Mason bees? Check. Leafcutter bees? Check. Blue orchard bees? Check. Bumble bees? Double-check.
Last June he presented a talk at the Smithsonian Institution, Washington, D.C., on "Western Bumble Bees in Peril" and in August, addressed the Western Apicultural Society conference in Healdsburg on native bees.
Retired? No way.
Among the other main speakers at the 2010 Bee Symposium: Kathy Kellison (top left), executive director of PFSP; beekeeper Serge Labesque of Glen Ellen, Sonoma County; researcher and beekeeper Randy Oliver of Grass Valley, Nevada County; and Eric Mussen, Extension apiculturist (honey bee specialist) and a member of the UC Davis Department of Entomology.
The conference also will include information on beekeeping practices, innovative approaches and ecological strategies for beekeepers, Kellison said, "and actions that can be taken by beekeepers, groups and other interested supporters who wish to help our bees."
Kellison say the "early bee" (not "early bird") registration for the 2010 Bee Symposium is $25 if you sign up by March 1. After March 1, the cost is $30. It's open to all interested persons.
More information on the symposium, including registration, is on the PFSP Web site.
Have you seen the little syrphid flies, aka flower flies and hover flies, hovering around the early spring blossoms?
Native pollinator specialist Robbin Thorp, emeritus professor of entomology at the UC Davis Department of Entomology, said these syrphids (below) are probably from the genus Toxomerus. The family is Syrphidae (flower flies).
The larvae of these insects are good to have in your garden--they eat aphids, thrips and small caterpillars. The adults feed on nectar and pollen.
The syrphids fly so fast that you almost need a motor drive to capture them in flight. Plus, they seem especially skittish this time of year. Shadow them with your body or camera and they're gone in a flash.To learn more about flower flies, a good read is Robert Buggs' 25-page booklet, "Flower Flies (Syrphidae) and Other Biological Control Agents for Aphids in Vegetable Crops," published in May 2008 by the University of California, Division of Agriculture and Natural Resources (UC ANR). You can download it for free by accessing this page.
It's illustrated with photos that will help you recognize many of the syrphids.
The bumble bee population is declining and some species are teetering on the brink of extinction.
That's the gist behind why three conservation groups and bumble bee researcher Robbin Thorp, emeritus professor of entomology at UC Davis, are asking the federal government to impose regulations on the movement and health of commercial bumble bees to protect the declining native/wild bumble bee population.
A Jan. 12th press release issued by the Xerces Society for Invertebrate Conservation is drawing worldwide attention. The latest coverage came from the New York Times and the Washington Post.
Take Franklin's bumble bee. That's a bumble bee found only in a small stretch of southern Oregon and northern California. Robbin Thorp, a member of the Xerces Society, hasn't seen it for several years and fears it may be extinct.
You'll want to read the article on "Bumble Bees in Decline" on the Xerces Society Web site and look at the photos of the bumble bees that could be nearing extinction.
Two recent studies provide a direct link between diseases in commercial bumble bees and the health of wild bumble bees:
--Otterstatter, M.C., and J.D. Thomson. 2008. Does Pathogen Spillover from Commercially Reared Bumble Bees Threaten Wild Pollinators? PLoS One. Available online at http://www.plosone.org/doi/pone.0002771
--Colla, S.R., M.C. Otterstatter, R.J. Gegear, and J.D. Thomson. 2006. Plight of the Bumblebee: Pathogen Spillover from Commercial to Wild Populations. Biological Conservation 129: 461-467.
Otterstatter and Thomson note that wild bumble bees near greenhouses have higher pathogen loads (of Crithidia bombi and Nosema bombi) than bumble bees farther away from greenhouses.We're glad to see this kind of research under way and the proposed restrictions sent to the USDA. We need to protect our wild bumble bees.
Franklin's Bumble Bee
The January newsletter published by the eXtension.org Bee Health Community of Practice includes:
* New Feature: Managed Pollinator CAP Updates
* Social Media Strategy Developed
* YouTube Channel Launched
* New Feature: University of Florida Bee Disease Videos
* FAQ's Organized by Category
* Google Analytics: Bee Health Homepage in Top 10 at eXtension.org
* On the Calender
One of the many bee experts who answers the Frequently Asked Questions (FAQs) is John Skinner of the University of Tennessee, who has strong UC Davis connections. He received his doctorate in entomology from UC Davis in 1987, studying with major professor and native pollinator specialist Robbin Thorp. Although an emeritus professor since 1994, Thorp continues his research. He maintains an office in the Harry H. Laidlaw Jr. Honey Bee Research Facility, UC Davis.
Here's a sampling of the questions that Skinner answered in the last few months:
How Do Bees Make Wax?
Bees produce the beeswax used in the construction of their combs from the four pair of wax glands located on the underside of the abdomen. These glands are most highly developed and active in bees 10-18 days old. The wax appears in small, irregular oval flakes or scales that project between the overlapped portions of the last four abdominal segments. Wax can be secreted only at relatively high temperatures and after a large intake of honey or nectar. --John Skinner, University of TennesseeHow Do Bees in a Swarm Determine Where to Go for a New Home?
A swarm of bees hanging on a branch includes a queen and thousands of worker bees. Some of these bees function as scouts and search the surrounding area for a suitable category to move into. The scouts return to the swarm cluster and dance to communicate information to the bees in the swarm. There may be numerous dances all going on at the same time. The results are similar to a dance contest where the number of dances is reduced until only one dancer left. Within a half hour of reaching an “agreement” the swarm flies to the new location. --John Skinner, University of TennesseeHow Long Do Honey Bees Live?
During the active season, the lifetime of a worker is five to six weeks. Overwintering worker bees may, however, live for four to six months. Whatever their life span, worker bees usually confine themselves to one task at a time, working without pause. If they are field bees, they may be scouts or collectors. Scouts look for sources of nectar and pollen. Once suitable sources are located, the scouts recruit additional foragers.
Nectar collectors, pollen foragers, water gatherers or propolis gatherers work so single-mindedly at their jobs, they will not stop even to collect honey placed before them. During the day, one may see hundreds of spent workers, wings ragged, returning wearily to the hive. Worker bees are aptly named as they literally work themselves to death. Death occurs following approximately 500 miles of flight. --John Skinner, University of TennesseeHow Can Worker Honey Bees Perform So Many Tasks in Their Short Lives?
The lives of the worker bees fall roughly into two periods. During the first period of approximately three weeks, they are called hive or house bees. On emerging from their cells, they groom themselves and engorge on honey and pollen from the storage cells. Their first three days are spent cleaning out brood cells. Thereafter as they mature, glands including labial, salivary, hypopharangeal and wax become functional they feed the older larvae and then the younger larvae, take orientation flights, evaporate nectar, build comb, feed the queen and the drones, keep an even temperature in the brood nest and guard the entrance to the hive. These differences in responsibilities based on worker age are known as a division of labor. But, depending on specific circumstances, it can be very flexible.
The last half of a worker bee’s adult life is devoted to foraging duties outside the hive. Four necessary items collected outside the hive are pollen, nectar, water and propolis (bee glue).--John Skinner, University of TennesseeGot a question? Just ask it on this page.
Another noted bee expert connected with the "Bee Health" Web site is Extension Apiculturist Eric Mussen, member of the UC Davis Department of Entomology faculty. Read some of his answers to FAQs posted on the Harry H. Laidlaw Jr. Honey Bee Research Facility Web site.
It's all about keeping our bees healthy.
Trio on Sedum