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The Secret Life of Native Bees

Science & Tech  (tags: animals, bees, discovery, environment, habitat, health, interesting, investigation, honey bees, pollinators, research, study, world )

- 1645 days ago -
As colony collapse disorder takes its toll on honeybees, native bees draw attention as an insurance policy for future food security.

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Kathy B (106)
Friday December 20, 2013, 8:43 am
Over the last decade biologists, citizen scientists and others have fanned out across the United States and parts of Latin America to detect the presence of native bees in the landscape. It’s an effort by the U.S. Geological Survey to get a sense of the overall health and status of native bees, some 4,000 species of which are known to inhabit the U.S. After visiting 100 parks and various wild lands (places that can serve as refuge to bees, away from the stressors that appear in cities and on farms), cataloging bees, wasps and other species they interact with, the group has evidence suggesting native species are surprisingly robust, despite the downward trend in pollinator populations on the whole. Hardy native bees abound on public lands, while others continue to hang on in cities and farmlands altered by human activity.

This is a bright spot amid the dire news heard recently about domesticated honeybees — the demise of hives due to an onslaught of environmental and biological threats. Though wild bees face adversity from the loss of habitat and exposure to pesticides, the phenomenon affecting domesticated bees known as colony collapse disorder does not affect native bee species.

But not much else is known about native bees.

“We’re lacking a lot of data,” says Sam Droege, director of the USGS Bee Inventory and Monitoring Lab, a fact confirmed by a recent report published by the Congressional Research Service. A lack of long-term population data or knowledge of native bee taxonomy makes it very difficult to determine with certainty if native bees are fading from the landscape.

According to the U.S. Department of Agriculture, bee pollinators add an estimated $15 billion to crop values per year to the U.S. economy.

That’s one reason the USGS established the Bee Monitoring and Inventory Lab in 2004. Droege was asked to create long-range surveys of bee populations to determine whether native bees are in decline, and that depends on the ability to identify them in the first place. While native bee numbers, ranges and interactions with honeybees are all pieces of a puzzle that conservationists and scientists have been trying to put together for a decade, there is a sudden sense of urgency with news of honeybees’ demise and the decline of bumblebees (which have been studied more than other native species, according to Droege). Piecing together that puzzle will be key to developing comprehensive bee conservation strategies.

One part of the conservation effort is a database currently containing approximately 1,400 high-resolution images (though more are continually being added) of bees and other species they mix with in the wild that the biologists and scientists mentioned above have sent the USGS, which is only a tiny fraction of the 250,000 specimens in the agency’s vast collection. The images were made using a macro lens at the bee lab in Maryland — capturing remarkable detail — and are used in guides and for identification purposes.

Unlike honeybees, most native species lead solitary lives. Some occupy nooks and crannies in the landscape, such as hollowed out logs, or burrow into the ground. The vast majority of native bee species pass unheeded or undetected by humans. Scant attention has been paid to them, despite the urgency surrounding CCD.

Currently their domesticated counterparts, along with other pollinators, pollinate approximately 30 percent of the world’s food supply. In the U.S., honeybees pollinate apples, almonds and citrus crops, to name a few. According to the U.S. Department of Agriculture, bee pollinators add an estimated $15 billion to crop values per year to the U.S. economy, with countless farm workers directly dependent on the harvest for employment. Native bees, for their part, participate in pollinating 70 percent of the world’s flowering plants and along with other native pollinators, add an estimated $3 billion in economic value per year in the U.S., according to the Xerces Society, a nonprofit group specializing in invertebrate conservation.

Worldwide, 20,000 bee species inhabit every corner of the globe where plants flourish. Combined, they are more likely to withstand disease and climate change than the lone honeybee.

A 2002 paper in the Proceedings of the National Academy of Sciences noted that “native bee communities might provide an insurance policy” against honeybee shortages and therefore could be used to secure the future of food production. The Xerces Society heeded the message. In recent years, the society has partnered with the USDA’s Natural Resource Conservation Service and universities to educate stakeholders on the benefits of native bees as pollinators. And since 2009, it has trained 26,000 farmers and land managers on ways to enhance native bee habitats, publishing evidence-based guidelines on various ways farmers can attract native bees and other beneficial insects to their land and, as a result, also mitigate or reduce pesticide use by attracting small predators, such as flies, wasps and beetles that consume pests known to infest farmers’ crops.

Worldwide, 20,000 bee species inhabit every corner of the globe where plants flourish. Combined, they are more likely to withstand disease and climate change than the lone honeybee. Mace Vaughan, a pollinator specialist at the Xerces Society, stresses the advantages of promoting bee habitats — from increasing crop yields to boosting plant and animal diversity. According to Vaughan, CCD has served as both a warning and a wake-up call. “We really need to be looking at what’s going on with our native bees, because they’re facing most of the same stresses [as honeybees],” he says.

Promoting a greater awareness of the environmental services native bees provide and creating bee-friendly habitats are necessary first steps. The aim is to boost pollinator populations and protect native species to ensure the future of farming. Recent findings reported in the journal Ecology Letters support a move toward greater conservation. In Europe, where bee species have been more closely studied for a longer time, the decades-long decline of pollinators has slowed, the study notes, and in some instances wild bee populations have been on the uptick due to changes in farming practices. In addition, earlier this year the European Union voted for a two-year ban on three commonly used pesticides linked to bee deaths, which went into effect this month.

All of this is encouraging news for conservationists, and perhaps even better news for bees. With some human intervention in the right direction, native bees (at least) might be just fine.

Victoria Oakey (124)
Friday December 20, 2013, 9:56 am
Noted. Thank you for the information.

Past Member (0)
Friday December 20, 2013, 1:31 pm
Would have liked to shared this with others through email but that option was not offered. You could only share through mainstream social media sites which I do not belong to

Past Member (0)
Friday December 20, 2013, 1:32 pm
Appreciated the info on this though as my husband is a beekeeper. Will pass the name of the article on to the areas bee keeper club

Roger G (154)
Friday December 20, 2013, 1:37 pm
noted, thanks

DaleLovesOttawa O (198)
Friday December 20, 2013, 7:46 pm
Debbie S, you can always copy and paste the link and add it to a personal email.

Interesting article, we depend on bees for so many things.

Kerrie G (116)
Saturday December 21, 2013, 12:10 am
Noted, thanks.

John Y (82)
Saturday December 21, 2013, 5:10 am

Jonathan Harper (0)
Saturday December 21, 2013, 6:56 am
Save bees

. (0)
Saturday December 21, 2013, 8:00 am
Very interesting, Kathy. Thanks for sharing.

Kathy B (106)
Saturday December 21, 2013, 9:13 am
You bring up a good point John G., and one I thought of as I was reading the article. I also wonder if our regulators will think that since the wild bee populations don't appear to be in much danger if they will think there isn't really much to worry about.

Bob P (394)
Saturday December 21, 2013, 1:03 pm
Thanks Kathy

Gvapo T (22)
Saturday December 21, 2013, 1:03 pm
Thanks for the article Kathy
Bees are amazing creatures and we all should do anything we can to protect and help them - at least to have few clean flowers on the windows

Ondine J (134)
Saturday December 21, 2013, 2:18 pm
Noted thanks for a great posting Kathy!

Ann Breeden (65)
Saturday December 21, 2013, 3:41 pm
Great article. I'm sure I have some resident bees on our 8 acres. I'm also planting a wide swath of wildflower mix for both the bees and butterflies. That's the least I can do to help them out.

Birgit W (160)
Saturday December 21, 2013, 3:55 pm
Thanks for sharing.

linda g (3)
Saturday December 21, 2013, 7:09 pm
Think I'll support the Xerces Society. Great article; posted to FB..

Past Member (0)
Sunday December 22, 2013, 2:34 am
Interesting article, thanks.

Ruth C (87)
Sunday December 22, 2013, 10:08 am
Bees are great little creatures. thanks to the Bees we continue living.

Kamia T (89)
Sunday December 22, 2013, 11:43 am
Haven't seen many European Honey Bees in last two years, what with crazy rains, freezes and droughts, so I've instructed anyone working on the place to leave alone ANY pollinator, whether it's a wasp, hornet, butterfly, bumble bee, sweat bee or whatever. I think that's our only salvation since the big corporations don't seem to care what they kill.

Carmen S (611)
Monday December 23, 2013, 7:43 pm
Thanks for sharing this, Kathy.

Sonia Minwer Barakat Reque (60)
Thursday December 26, 2013, 12:36 pm
Great article,thanks for sharing

. (0)
Friday December 27, 2013, 5:13 pm

amazing what bee pollen can do

Melania Padilla (122)
Monday January 20, 2014, 1:02 pm
No bees no food
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