[NatureNS] Notice of Meeting on Hemlock Woolly Adelgid

From: John and Nhung <nhungjohn@eastlink.ca>
To: naturens@chebucto.ns.ca
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Date: Wed, 28 Feb 2018 07:34:21 -0400
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&gt; Find out more at 7:00 P.M. Tuesday, March 13.  The Tusket River 
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There=E2=80=99s another point worth discussing:  if and possibly how =
lessons from the red spruce saga could/ should be applied (or not!).

=20

From: naturens-owner@chebucto.ns.ca =
[mailto:naturens-owner@chebucto.ns.ca] On Behalf Of Nick Hill
Sent: February 27, 2018 3:14 PM
To: naturens@chebucto.ns.ca
Subject: RE: [NatureNS] Notice of Meeting on Hemlock Woolly Adelgid

=20

I agree, John.

I too am leery about introducing yet another exotic to combat an exotic.

The sanitary approach is also worrisome as that approach leaves no =
organic no food for woodpeckers and doesn't let the tree determine its =
fate. I just got back from a walk where I showed my sister from UK =
healthy beech and then we found a large slightly chancred beech that had =
overgrown a miserable chancred individual that had died. I had to think =
about the possibility of differential susceptibility and evolution of =
resistance. We need to give the hemlock that chance.

And then there was the American Chestnut and its loss and replacement by =
chestnut oak.

=20

Yes. We can do more than one thing and that's good. But I may be averse =
to any agency that has the authority because of its name to come and cut =
out my hemlock. They did this with the red spruce with not much =
ecological understanding.

Nick

=20

On Feb 27, 2018 2:26 PM, "John and Nhung" <nhungjohn@eastlink.ca> wrote:

Good points, and I=E2=80=99d be uncomfortable with some proposed =
interventions.  Introduction of any exotic, for instance, has =
unpredictable consequences.

=20

I don=E2=80=99t think there=E2=80=99s any necessary conflict between =
attempts to preserve hemlock and other sustainable forest management =
initiatives.  For instance, I keep wondering about seed banks, which may =
or not be a good idea =E2=80=A6

=20

Hope you=E2=80=99re gonna catch some of the sessions, Nick.  The =
MTRI-organized ones are probably more geographically =
conveniently-located.  You could contribute substantively to the =
discussions!

=20

From: naturens-owner@chebucto.ns.ca =
[mailto:naturens-owner@chebucto.ns.ca] On Behalf Of Nick Hill
Sent: February 27, 2018 12:17 PM
To: naturens@chebucto.ns.ca
Subject: Re: [NatureNS] Notice of Meeting on Hemlock Woolly Adelgid

=20

Hi John and John

I don't doubt that the woolly adelgid will kill hemlock trees and that =
is change and unwelcome.

Let us first put it in a North American context with climate change and =
atmospheric N deposition.

We can research the impact that has occurred where the pest has moved =
through from Virginia through New England.

And then we can look at stand vulnerability factors. We stand to lose =
trees and some stands. The outbreaks will be heterogenous: stands =
receiving more N in SW Nova could be more affected. Cool ravines should =
be less affected. Stands near the coast may be less affected because =
there has been less temperature change over the past 30 y.=20

=20

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