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RE: [beemonitoring] Prairie biofuel surveys

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  • 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 1 of 5 , Nov 21, 2008
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         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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