[NatureNS] Jack Pine Die-back ???

From: "Dusan Soudek" <soudekd@ns.sympatico.ca>
To: "NatureNS" <naturens@chebucto.ns.ca>
Cc: "Richmond Campbell" <richmond@dal.ca>,
Date: Mon, 17 Aug 2009 15:41:04 -0300
Precedence: bulk
Return-Path: <naturens-mml-owner@chebucto.ns.ca>
Original-Recipient: rfc822;"| (cd /csuite/info/Environment/FNSN/MList; /csuite/lib/arch2html)"

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   Two days ago, while traversing the proposed Five Bridge Lakes =
Wilderness Area of the Chebucto Peninsula (HRM) by canoe, I noticed a =
large number of dead Jack Pines in the barrens and semi-barrens near =
Upper Five Bridge Lake. The dead trees show no signs of porcupine or any =
other damage, remain upright, and may have died a few years ago. All =
other tree species in the area (Tamarack, two spruce species, Paper =
Birch) appear to be healthy.
   The dead Jack Pines are too high above the lake to have been =
negatively effected by a slight rise in the lake's level due to a new =
beaver dam at its outlet. They are solitary trees or in small clusters, =
and not part of a canopy, so it doesn't seem likely that they are being =
outcompeted by other tree species as part of a natural ecological =
succession.
   Any other sightings of clusters of dead Jack Pines in the area? In =
the province? Any speculation on what may be happening here?
Dusan Soudek  
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<DIV><FONT size=3D4>&nbsp;&nbsp; Two days ago, while traversing the =
proposed Five=20
Bridge Lakes Wilderness Area of the Chebucto Peninsula (HRM) by =
canoe,&nbsp;I=20
noticed a large number of dead&nbsp;Jack Pines in the barrens and =
semi-barrens=20
near Upper Five Bridge Lake.&nbsp;The dead trees&nbsp;show no signs of =
porcupine=20
or any other&nbsp;damage, remain upright, and may have died a few years =
ago. All=20
other tree species in the area (Tamarack, two spruce species, Paper =
Birch)=20
appear to be healthy.</FONT></DIV>
<DIV><FONT size=3D4>&nbsp;&nbsp; The dead Jack Pines&nbsp;are too high =
above the=20
lake to&nbsp;have been negatively effected by a slight rise in the =
lake's level=20
due to&nbsp;a new beaver dam at its outlet. They are solitary trees or =
in small=20
clusters, and not part of a canopy, so it doesn't seem&nbsp;likely that =
they are=20
being outcompeted by other tree species as part of a natural ecological=20
succession.</FONT></DIV>
<DIV><FONT size=3D4>&nbsp;&nbsp; Any other sightings of clusters of dead =
Jack=20
Pines in the area? In the province? Any speculation on what may be =
happening=20
here?</FONT></DIV>
<DIV><FONT size=3D4>Dusan Soudek</FONT>&nbsp;&nbsp;</DIV></BODY></HTML>

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