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RE: [beemonitoring] Prairie biofuel surveys

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  • Cane, Jim
    Elaine- Ceratina and maybe Hylaeus come to mind as cavity nesters for your herbacous prairie vegetation, maybe the smaller megachilids too. Flight vagility
    Message 1 of 5 , Nov 20, 2008

      Elaine- Ceratina and maybe Hylaeus come to mind as cavity nesters for your herbacous prairie vegetation, maybe the smaller megachilids too.  Flight vagility will vary with body size, and dispersal distances into trap blocks may not correspond with foraging distances.  Prairies have been hayed for more than a century, and burned for much longer than that, so cavity-nesters that are still around must have been putting up with this for a long time.  Indeed, land use history on those plots will be important to know.  I am inclined to agree with you, that of all the ways you could modify prairie, this one probably will be among those with least impact on bee faunas.  Now if it enocouraged more prairie restorations because it gave them value, why that might even be good!






      PS You are familiar with the several papers by Catherine Reed on tall grass prairie bee faunas, I presume.



      James H. Cane

      USDA-ARS Bee Biology and Systematics Lab

      Utah State University , Logan , UT 84322 USA

      tel: 435-797-3879   FAX: 435-797-0461

      email: Jim.Cane@... 

      web page: www.ars.usda.gov/npa/beelab


      "Seek simplicity but distrust it."
      Alfred North Whitehead


    • Charles Guevara
         Hello, Elaine, thanks to orthography we have a pretty much :east to west precipitation gradient in going west from Ohio valley.  Our praries grasses
      Message 2 of 5 , Nov 21, 2008
           Hello, Elaine, thanks to 'orthography' we have a pretty much :east to west precipitation gradient in going west from Ohio valley.  Our praries 'grasses' consequently differ in their assemblage-ecosystems...going :east to west.  Growth season for regions along this gradient(east to west) are strongly adapted/linked to precipitation.
           Your rather unclear description of: 'harvest protocol', but note of:'September harvest'....leads to asking you: what criteria of 'growth-season recovery' are you using?
        Precipitation being the driver  of growthseason, have you first (our praries severely fragmented already in con-US)...have you first honestly defined 'prarie growthseason for Mn, in times of drought?'.  Always a temptation in 'celulosic fuel protocols' to follow the 'energyyield of a particular resource plant'...and ignore the community assemblage...sort of 'a drift to monoculture', rather than prarie stewardship.
           Long story short, what criteria are you using for 'growthseason recovery' in your various treatments?    charlie guevara NJ,US

        --- On Thu, 11/20/08, Pierre Martineau <pierrem@...> wrote:
        From: Pierre Martineau <pierrem@...>
        Subject: RE: [beemonitoring] Prairie biofuel surveys
        To: beemonitoring@yahoogroups.com
        Date: Thursday, November 20, 2008, 4:41 PM

        What is the method of harvest?  Will it affect the soil structure?
        -----Original Message-----
        From: beemonitoring@yahoogroups.com [mailto:beemonitoring@yahoogroups.com]On
        Behalf Of elaineceleste
        Sent: Thursday, November 20, 2008 8:12 AM
        To: beemonitoring@yahoogroups.com
        Subject: [beemonitoring] Prairie biofuel surveys
        Hello all.
        I am working with some ecologists at the U of MN who are doing a grand
        scale study looking at using established prairies as sources of
        biofuel. The study focuses on the impact of different harvest regimes
        on wildlife. They are looking at many different groups but they would
        like to include bees.
        The study in a nutshell: There will be from 3 to 6 target areas in
        different parts of the state. Each target area will be organized into
        four blocks. All treatments will appear in each block. Each treatment
        will be as large as possible with the goal of 10 to 40 acres. So there
        will be four replicates in each target area. The treatments are 100%
        harvest, harvest all but 25%, harvest all but 10%. Harvest will take
        place in late Sept. They'll be examining effects on birds, small
        mammals, soil macro-invertebrates, and a slew of other things.
        In thinking about what bee groups will be most impacted by this, I am
        guessing it may be stem nesters. I'm thinking about using both pan
        traps (bee bowls) and trap nesting. I have concerns about the
        treatments affecting the attractiveness of the traps. If there is 10
        acres of stubble, the trap nests and bowl will be more visible and
        attractive. I've thought about bumble bee surveys at flowers, but I am
        afraid of too much variation between field workers as I am not sure
        how much training they will get. Sweep netting to supplement the bowl
        traps is a good possibility.
        Although I have experience identifying a wide variety of bees, I need
        to learn more about their biologies.
        Does anyone have a sense of the distance from which trap nests would
        attract bees? Would they be likely to draw in bees from off the plot?
        Ideas about what prairie plants are most used by stem nesters?
        What bee groups do you think would be affected, either positively or
        negatively, by having vegetation removed in the fall?
        My first guess is that there won't be an impact on bees or rather that
        any impact will not be as large as the bee population variability due
        to things like weather and disease, and so will be difficult to
        measure. However, I love the idea of getting some bee survey
        information for various regions in MN and this may be a good excuse
        for that.
        I look forward to hearing your ideas.
        -Elaine Evans
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