RE: [beemonitoring] oaks and bee populations
- Thanks Jim:
Interesting. It seems to have the possible characteristics of a desperation food, but then again, it is not zero so barriers to its use must be somewhat low.
Sam Droege sdroege@...
w 301-497-5840 h 301-390-7759 fax 301-497-5624
USGS Patuxent Wildlife Research Center
BARC-EAST, BLDG 308, RM 124 10300 Balt. Ave., Beltsville, MD 20705
Okay, not one can write a symphony, or a dictionary,
or even a letter to an old friend, full of remembrance
Not one can manage a single sound though the blue jays
carp and whistle all day in the branches, without
the push of the wind.
But to tell the truth after a while I'm pale with longing
for their thick bodies ruckled with lichen
and you can't keep me from the woods, from the tonnage
of their shoulders, and their shining green hair.
Today is a day like any other: twenty-four hours, a
little sunshine, a little rain.
Listen, says ambition, nervously shifting her weight from
one boot to another -- why don't you get going?
For there I am, in the mossy shadows, under the trees.
And to tell the truth I don't want to let go of the wrists
of idleness, I don't want to sell my life for money,
I don't even want to come in out of the rain.
- Mary Oliver
From: "Cane, Jim" <Jim.Cane@...> To: Laurence Packer <laurencepacker@...>, "firstname.lastname@example.org" <email@example.com>, Sam Droege <sdroege@...> Cc: Johnny Stowe <StoweJ@...> Date: 10/23/2011 01:44 PM Subject: RE: [beemonitoring] oaks and bee populations Sent by: firstname.lastname@example.org
Sam and others- I have seen, on occasional years, when frost eliminates blueberry bloom, or when bees continued to nest after bloom, that female Habropoda laboriosa will collect and provision nest cells with oak pollen. I do not know the fates of those progeny. Dr. Michener (1956) reported a similar case for Andrena that normally use Erythronium in Kansas. Inge Bischoff reports Colletes cunicularius to use oak pollen in Germany. Just out of curiosity, I exhaustively removed and counted pollen from a few individual catkins and found them to average about 1 million pollen grains each! By that measure, 3 catkins has all the pollen for one Habopoda provision. Fowler (1899) reported early-on about another Habropoda using oak pollen. And from my work with T’ai Roulston on protein contents (2000), oak pollen is near the top of the list for protein content among wind-pollinated plants (and superior to, for instance, sunflower). These are examples that come to mind. That O. rufa paper by Tony Raw that Laurence mentioned was the first to catch my attention on the topic. I am certain that the average oak pollen grain does _not_ end up in a bee provision, however (although from the evidence, I do sometimes wonder why bees do not use it much more widely).
James H. Cane
USDA-ARS Pollinating Insect Research Lab
Utah State University, Logan, UT 84322 USA
tel: 435-797-3879 FAX: 435-797-0461
Gardening for Native Bees: http://extension.usu.edu/files/publications/factsheet/plants-pollinators09.pdf