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Hi Dusan,
Yes and no. A sufficiently high wind can mow a swath through =
undisturbed forest. And counting Dec 13, 2010 (ignoring Juan because it =
was local) we have had two high winds recently; one even in May, 2013 =
(?). And many winds which finish the job or start fresh ones.
The Kentville ravine is a good example; the 2010 wind felled a =
significant area of Hemlock/hardwood. In my woods more Poplar went over =
than 5 households could use both as 'scattered' trees of up to 6 in one =
domino and two areas (~1 acre & 2 acres) where nearly every tree went =
down. Most large Spruce which survived 2010 were taken in 2013.=20
=20
I think we are in a new era of damaging winds. Note that Juan took =
large trees and spared medium trees. With regard to canopy protection =
this no doubt helps but if trees grow with space they are better =
anchored than trees which grow crowded.=20
Yt, DW
----- Original Message -----=20
From: Dusan Soudek=20
To: naturens@chebucto.ns.ca=20
Sent: Monday, February 08, 2016 9:28 AM
Subject: Re: [NatureNS] two trees to buy a pizza or would we rather a =
car with the same two trees?
=EF=BB=BF To Donna, David, et al;=20
one of the obvious way trees in a forest cooperate is protection =
against strong winds. A solitary tree is unlikely to withstand =
windstorms, a forest with an intact canopy usually does. But, on the =
other hand, there is brutal competition for sunlight in a forest. Taller =
trees inhibit the growth of smaller trees, often their conspecifics and =
even their own descendants. Of the millions and millions of seeds a =
mature tree will produce over its lifetime, on the average only one will =
reach maturity...=20
Dusan Soudek=20
=20
=20
On February 8, 2016 at 8:21 AM David & Alison Webster =
<dwebster@glinx.com> wrote:=20
Hi Donna & All, Feb 8, 2016=20
The book, The Hidden Life of Trees, should be interesting =
reading.=20
=20
But there is nothing mysterious about "...for reasons unknown, =
keep the ancient stumps of long-felled companions alive for centuries by =
feeding them a sugar solution through their roots.=E2=80=9D This is root =
grafting practiced by Spruce sometimes, Hemlock always, Fir sometimes =
and Norway Maple.=20
Root grafting is I suspect a reflection of somewhat hostile soil =
conditions and/or perhaps 'permanent woodland' such that extension roots =
tend to follow old root channels as opposed to making a new one. When a =
root cap of tree A meets one of tree B they sometimes (always ?) unite =
and form a 2-way link.=20
Decades ago I came across a great example of this at Dean =
Chapter Lake. The roots of the Spruce forest which had been killed by =
raising the water level for hydro were mostly intact but exposed by =
wash. Every Spruce I saw was attached to two or more Spruce by grafting.
Yt, Dave Webster, Kentville
----- Original Message -----=20
From: Donna Crossland=20
To: naturens@chebucto.ns.ca=20
Sent: Sunday, February 07, 2016 9:11 PM=20
Subject: [NatureNS] two trees to buy a pizza or would we rather a =
car with the same two trees?=20
=20
This forest article was forwarded to me by Jon Percy. Bob =
Bancroft has also circulated around to some, but it is worth ensuring =
that everyone sees it. =20
=
http://www.nytimes.com/2016/01/30/world/europe/german-forest-ranger-finds=
-that-trees-have-social-networks-too.html?hp&action=3Dclick&pgtype=3DHome=
page&clickSource=3Dstory-heading&module=3Dsecond-column-region®ion=3Dt=
op-news&WT.nav=3Dtop-news&_r=3D0
The parts I enjoyed-
=E2=80=9C in nature, trees operate less like individuals and more =
as communal beings. Working together in networks and sharing resources, =
they increase their resistance.=E2=80=9D
=E2=80=9CIn one forest, they said, when they wanted to buy a car, =
they cut two trees. For us, at the time, two trees would buy you a =
pizza.=E2=80=9D
=E2=80=9C that trees in the forest are social beings. They can =
count, learn and remember; nurse sick neighbors; warn each other of =
danger by sending electrical signals across a fungal network known as =
the =E2=80=9CWood Wide Web=E2=80=9D; and, for reasons unknown, keep the =
ancient stumps of long-felled companions alive for centuries by feeding =
them a sugar solution through their roots.=E2=80=9D
This should be required reading for all personnel who =
=E2=80=98manage=E2=80=99 our forests.
If we want folks to relate to the forest on a more personal level, =
other than as a simple entity to mow down for relatively low profit, =
this way of describing our forests may be a good approach.
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7441 / Virus Database: 4522/11564 - Release Date: =
02/05/16
=20
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7441 / Virus Database: 4522/11564 - Release Date: =
02/05/16
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