[NatureNS] Fuzzy "stuff" on trees, ID? - dead larches

From: "Mary Macaulay" <marymacaulay@hotmail.com>
To: naturens@chebucto.ns.ca
Date: Wed, 13 Sep 2006 20:14:45 -0300
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Return-Path: <naturens-mml-owner@chebucto.ns.ca>
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Speaking of dead larches - I have several very recently dead ones in my back 
garden - Does anyone know what might be killing them?
Mary

----Original Message Follows----
From: Bob McDonald <bobathome@hfx.eastlink.ca>
Reply-To: naturens@chebucto.ns.ca
To: naturens@chebucto.ns.ca
Subject: Re: [NatureNS] Fuzzy "stuff" on trees, ID?
Date: Tue, 12 Sep 2006 16:56:22 -0300

Hello Peter,

Your "fuzzy stuff" growing on the trees are lichens.  This is clearly an 
Usnea species (a so-called Beard Lichen) but there are several of these in 
NS.  It looks most like Usnea longissima (Methusaleh's Beard Lichen) which 
can be up to 3 m long!!

BTW, lichens do not harm the tree and use it simply as a substrate, i.e. a 
place to grow.  There is an increasing number of people in the province 
interested in learning about lichens, especially since they are a valuable 
natural indicator of air quality.  In fact, the Usnea lichens in particular 
are very intolerant of pollution and are hard to find, say, on the Halifax 
peninsula.  We have a few small Usnea lichens growing on a dead Larch in our 
backyard and as the air quality improves more, they can get very large.  
Yours is a very healthy population and clearly the air quality is very 
high!!

Cheers,

Bob McDonald
Clayton Park West
Halifax

   ----- Original Message -----
   From: Peter dewit
   To: naturens@chebucto.ns.ca
   Sent: Tuesday, September 12, 2006 4:09 PM
   Subject: [NatureNS] Fuzzy "stuff" on trees, ID?


   Noticed the "fuzz" growing on the trees at Thomas Cove Coastal Reserve, 
Headlands Trail when hiking on Saturday (sept 9th)

   I'm not familiar with what it is.  They were growing on the base of the 
trees, probably taking over the lower 3-5 feet of branches that started at 
about 6 feet off the ground, almost no leaves on those branches, and they 
were on parts of the trunk.   Above that area the trees looked normal.  I 
did not think to stop and record the type of tree or photograph more of it 
while I was on a fast walking pace.

   It was very dry to touch, probably makes a good fire starter when in 
neeed.

   Some photos included here:

   http://halifaxns.net/peterpictures/thomascove/thomascove18.JPG
   http://halifaxns.net/peterpictures/thomascove/thomascove19.JPG




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