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>> > -----Original Me
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A number of years ago Nick I was involved in a salmon project about
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improving the ph in the river. Dave provided us with a lot of useful
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insights - thanks again Dave!
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One suggestion was to lime Christmas tree plantations. This because of
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easy access, roads and so on but the farmers told us that liming would
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increase the growth of deciduous trees, which to them are weeds, so
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were opposed to the scheme.
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Very soon the salmon association fell apart over another issue so there
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was nothing further on liming!
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We do know when one forest is harvested or dies of another species generally
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takes its place, Graves Island is a go example, A forest of white spruce died of
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to be replaced by a forest of Balsam Fir. As the why I'm not sure.
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Enjoy the winter
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Paul
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On December 27, 2015 at 9:03 AM Nicholas Hill <fernhillns@gmail.com> wrote:
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Hi Dave
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I can't get Bill's article right now but the New England counterpart article in Env Man (1987, vol 11, 659) says.."Calcium appears to be the nutrient most susceptible to depletion with 13% of the total site calcium removed in whole-tree clearcut products" (Abstract but these authors analysed exchangeable and total Ca ). Bill took the same approach I believe. The New England pit samples were to 60cm.
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So Bill's study finding that whole tree harvest would remove 27% of site Ca shows that northern temperate forests are more susceptible with latitude, something that works against the movement of calcium requiring woodland flora. These plants are often called the rich mesophytic plants or mixed mesophytic or here the Alleghanian flora. Shelly Porter and Tom Herman studied them along the Meander River (Maidenhair Fern there), and we showed that even in these richest of NS deciduous forest sites, the floodplain forest (3 times more Ca in top of A horizon--10 cm- at floodplains versus uplands), there was a strong positive relationship between species richness of a signature guild of spp (those with big seeds which were mostly rare..Lilium, Triosteum, Caulophyllum Allium Sanguisorba but also Impatiens Uvularia Arisaema) and total calcium. 
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This meant that bringing in the Appalachian hardwood plants into our province will be difficult because the plant community richness is linked to calcium but high calcium sites are rare and calcium is the most susceptible not only to forestry but to acidification (John Smol data using Daphnia in freshwater benthos layers as an indicator of the loss of calcium over last 60 years).
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Nick
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On Sun, Dec 27, 2015 at 7:11 AM, David & Alison Webster
<span><dwebster@glinx.com></span> wrote:
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Hi Nick & All                                Dec 27, 2015
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    A key question in this discussion is what fraction of soil calcium is under consideration ? Is this exchangeable Ca and soil was sampled to what depth ?
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Yt, DW, Kentville
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----- Original Message -----
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<strong>From:</strong>
Nicholas Hill
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<strong>To:</strong>
naturens@chebucto.ns.ca
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<strong>Sent:</strong> Saturday, December 26, 2015 7:30 PM
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<strong>Subject:</strong> RE: [NatureNS] Red Herring & Forestry
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<p>Steve,<br/>Bill Freedman had these data and Garbary and I referred to his paper w Morash as well as to a paper on a fractional analysis from New England. .conn..The take home message was that while biomass removal removed 13% of the soil calcium in new England,  a similar harvest removed 27% of soil calcium in Nova Scotia.</p>
<p>This story has another Dal connection: Barry Goldsmith, forest ecologist who worked at Dal before Bill Freedman. Barry (FB Goldsmith, we have