Posts Tagged: Robbin Thorp
What's that hopping on our patio?
At first we thought it was a grasshopper. Not!
It was a katydid, sometimes called a "long-horned grasshopper," from the family Tettigoniidae (as identified by Lynn Kimsey, director of the Bohart Museum of Entomology and UC Davis professor of entomology, and native pollinator specialist Robbin Thorp, emeritus professor of entomology at UC Davis).
"Katydids have long, threadlike antennae," said Kimsey. "Grasshopper antennae are rarely much longer than the head."
Said Thorp: "Note the long slender antennae (as long as or longer than the body); the very long slender jumping hind legs; and the scimitar-like ovipositor at the end of the abdomen."
Scientists tell us that the number of described species in the family Tettigoniidae exceeds 6400. Most katydids are green. They're often perfectly camouflaged in bushes and trees.
A katydid. The name is derived from the "song" it sings by rubbing its wings together. "Katy did." "Katy didn't."
This katydid, a female, responded to our footsteps. (Their "ears" or hearing organs are on their front feet.)
It hopped away, but not before we captured its image.
A katydid, or "long-horned grasshopper," from family Tettigonliidae. (Photo by Kathy Keatley Garvey)
But there's one thing they don't do. They don't check out the sand dunes, home of the bee villages.
Tiny holes are everywhere, yet nobody seems to notice.
They're the work of digger bees, aka faux bumble bees. These are Anthophora bomboides stanfordiana, researched by native pollinator specialist Robbin Thorp, emeritus professor of entomology at UC Davis.
"The (female) bees suck up water nearby and then regurgitate on the (faces of the) sandstone cliffs to moisten and excavate soil for the tunnels, construct their turrets, and finally to seal the nest tunnel," Thorp says. The bees use some of the soil from the base of the turret to plug the entrance.
The bee turrets are somewhat like our gated communities! Keep out!
The digger bees have "grocery stores" all around them. You'll see the males and females foraging on the wildflowers, which include yellow and blue lupine, California golden poppies, wild radish, mustard, dandelions, and seaside daises.
If you crouch next to the bee villages, a nearby hiker is likely to ask "Lose something?"
No, we found something!
A female digger bee finishes her nest. (Photo by Kathy Keatley Garvey)
A digger bee scouts the landscape. (Photo by Kathy Keatley Garvey)
Flying low, flying fast. (Photo by Kathy Keatley Garvey)
Sandy cliffs of Bodega Head hold bee villages. (Photo by Kathy Keatley Garvey)
Congrats to “The Bee Team” at the University of California, Davis.
The one-of-a-kind team, comprised of five Department of Entomology faculty members, received the coveted team award from the Pacific Branch, Entomological Society of America (PBESA), for their collaborative work specializing in honey bees, wild bees and pollination issues through research, education and outreach.
Their service to UC Davis spans 116 years.
The “Bee Team” is comprised of Extension apiculturist Eric Mussen; systematist/hymenopterist Lynn Kimsey, director of the Bohart Museum of Entomology and professor of entomology who coordinated the development and installation of a landmark bee friendly garden; and native pollinator specialist Robbin Thorp, emeritus professor of entomology; pollination ecologist Neal Williams, assistant professor of entomology who specializes in pollination and bee biology; and biologist/apiculturist Brian Johnson, assistant professor of entomology who specializes in bee communication, bee behavior and bee health.
PBESA represents 11 states, seven U.S. territories, and parts of Canada and Mexico.
Thorp, who retired from the university in 1994, continues to work full-time on behalf of the bees, and has tallied 49 years of service to UC Davis. Mussen, who will retire in June of 2014, has provided 37 years of service; Kimsey, 24; Williams, 4 and Johnson, 2.
“The collaborative team exceptionally serves the university, the state, the nation, and indeed the world, in research, education and public service,” wrote nominator Michael Parrella, professor and chair of the UC Davis Department of Entomology. “The Bee Team is really the ‘A’ team; no other university in the country has this one-of-a-kind expertise about managed bees, wild bees, pollination, bee health, bee identification, and bee preservation. Honey bee health is especially crucial. Since 2006 when the colony collapse disorder surfaced, we as a nation have been losing one-third of our bees annually. Some beekeepers are reporting 50 to 100 percent winter losses. The importance of bees cannot be underestimated: one-third of the food we eat is pollinated by bees.”
Among those lending support to The Bee Team through letters were the Mary Delany, interim chair of the UC Davis College of Agricultural and Environmental Sciences; AnnMaria "Ria" de Grassi, director of federal policy, California Farm Bureau Federation; Christi Heintz, executive director of Project Apis m. and the Almond Board of California Task Force Liaison; and Mace Vaughn, pollinator conservation program director of the Xerces Society for Invertebrate Conservation.
The Bee Team (from left) Eric Mussen, Neal Williams, Robbin Thorp, Lynn Kimsey and Brian Johnson. (Photo by Kathy Keatley Garvey)
It's good to see that the Xerces Society for Invertebrate Conservation and noted bumble bee expert Robbin Thorp of UC Davis have filed a petition with the U.S. Fish and Wildlife Service for Endangered Species Act protection for the beleagured rusty-patched bumble bee.
They previously filed a petition to save Franklin's bumble bee, a bumble bee known to inhabit a small area of southern Oregon and northern California. Thorp has been monitoring Franklin's bumble bee (Bombus franklini) since 1998 but hasn't seen it since August 2006 when he detected one at Mt. Ashland.
In a recent press release, the Xerces Society related that the rusty-patched bumble bee, (Bombus affinis), "has disappeared from 87 percent of its historic range (which once included 25 states). Where it is still found, this bee is much less abundant than it was in the past."
“The charismatic and once common rusty patched bumble bee has suffered severe and widespread declines throughout its range in the eastern U.S. since 1997," Thorp said. "The few scattered recent sightings thanks to intensive searches are encouraging, but the species is in critical need of federal protection.”
Why has the population of the rusty-patched bumble bee declined? Good question, and one with no fully determined answer, according to Thorp and Sarina Jepsen, the Xerces Society's endangered species program director.
"However, in related bumble bees that also are declining, researchers at the University of Illinois have recently found higher levels of a fungal pathogen and lower levels of genetic diversity," Jepson wrote in a press release. "Notably, the rusty-patched bumble bee was too scarce in the landscape to be included in these analyses."
"The leading hypothesis," Jepson says, "suggests that this fungal pathogen was introduced from Europe by the commercial bumble bee industry in the early 1990s, and then spread to wild pollinators. Although it has not been proven, the hypothesis is supported by the timing, speed and severity of the decline—a crash in laboratory populations of bumble bees occurred shortly before researchers noticed a number of species of formerly common bumble bees disappearing from the wild."
Meanwhile, we hope that Bombus affinis doesn't go the way of Bombus franklini.
As the Xerces Society's press release points out: "Pollinators are critical components of our environment and essential to our food security—providing the indispensable service of pollination to more than 85 percent of flowering plants and contributing to one in three bites of the food that we eat. Bumble bees are among the most widely recognized and well understood group of native pollinators in North America and contribute to the pollination of food crops such as squash, melon, blueberry, cranberry, clover, greenhouse tomato and greenhouse pepper, as well as numerous wildflowers."
The Xerces Society, an international organization founded in 1971 and headquartered in Portland, Ore., is a nonprofit organization that "protects wildlife through the conservation of invertebrates and their habitat" and "is at the forefront of invertebrate protection worldwide, harnessing the knowledge of scientists and the enthusiasm of citizens to implement conservation programs."
Native pollinator specialist Robbin Thorp of UC Davis is a nationally known expert on bumble bees. (Photo by Kathy Keatley Garvey)
This photo of the rusty-patched bumble bee is the 2012 work of Christy Stewart at the Pheasant Branch Conservancy in Wisconsin.
The bush germander (Teucrium fruticans) is definitely a great fall-winter plant that's a magnet for bees. Just look at the bees that frequent the germander in the Häagen-Dazs Honey Bee Haven on Bee Biology Road at UC Davis.
As soon as the temperature rises to a sunny 50 or 55 (good bee-flying weather), the honey bees head over to the haven from the nearby Harry H. Laidlaw Jr. Honey Bee Research Facility.
Last Saturday's visit to the haven yielded an "out-to-lunch" bunch that included a dozen honey bees in the germander and one syrphid fly (aka flower fly or hover fly). Bumble bee aficionado Gary Zamzow, one of the volunteers in the haven, found something better: A bumble bee, a queen Bombus melanopygus or black-tailed bumble bee, foraging in the germander.
The germander bush is one of several plants blooming in the haven in the dead of winter, according to Missy Borel, haven volunteer and program manager of the California Center for Urban Horticulture at UC Davis. Among the others blooming or just finishing a bloom:
- Autumn sage (Salvia greggii)
- Blanket flower (Gallardia)
- Bulbine (Bulbine frutescens)
- Butterfly rose (Rosa mutabilis)
- Catmint (Nepeta)
- Cleveland sage (Salvia clevelandii)
- Coreopsis (Coreopsis)
- Red hot poker (Kniphofia)
- Dwarf plumbago (Ceratostigma plumbaginoides)
- Oregano (Origanum vulgare ‘Betty Rollins’ )
- Lavender (Lavandula)
- Rosemary (Rosmarinus)
- Sage (salvia)
- Seaside daisies (Erigeron glaucus 'Wayne Roderick')
"Honey bees in California will seek forage on warm sunny days in California," Thorp noted. "Some Asteraceae and mint family flowers will continue blooming and provide some food for honey bees, but they primarily rely on their stored honey to get them through the winter."
Honey bee foraging in bush germander. (Photo by Kathy Keatley Garvey)
Syrphid fly, aka flower fly or hover fly, visiting germander. (Photo by Kathy Keatley Garvey)