next message in archive
next message in thread
previous message in archive
previous message in thread
Index of Subjects
a 40m width
This is a multipart message in MIME format.
------=_NextPart_000_003C_01D16269.3061D0E0
Content-Type: text/plain;
charset="utf-8"
Content-Transfer-Encoding: quoted-printable
When I was a CUSO volunteer in Northeast Thailand, thirty-odd years ago, ou=
r country Director (a soil scientist by training) called trees =E2=80=9Cnut=
rient pumps.=E2=80=9D
Made eminent sense in an area with terrible soils, with minimal organic con=
tent.
From: naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca] =
On Behalf Of Nicholas Hill
Sent: February 8, 2016 11:44 AM
To: naturens@chebucto.ns.ca
Subject: Re: [NatureNS] two trees to buy a pizza or would we rather a car w=
ith the same two trees?
Trees have been called environmental engineers as they make habitat and set=
up the food web. We are very lucky to have neighbours that let us walk and=
bring kids through their woods that are in good condition with large matur=
e trees of pines and hemlock. We saw the strips of tree felling from the mi=
crobursts that we called the Berwick Blow of a few winters ago that took ou=
t some 200 year old hemlock but we also see blow down along a line between =
two properties where still another neighbour has clearcut and it has made i=
t not possible to ski in the adjacent uncut property over a 40m width due t=
o blow down.
On Mon, Feb 8, 2016 at 11:06 AM, David & Alison Webster <dwebster@glinx.com=
> wrote:
Hi Dusan,
Yes and no. A sufficiently high wind can mow a swath through undisturbe=
d 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 wind=
s which finish the job or start fresh ones.
The Kentville ravine is a good example; the 2010 wind felled a signific=
ant area of Hemlock/hardwood. In my woods more Poplar went over than 5 hous=
eholds 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 Sp=
ruce which survived 2010 were taken in 2013.
I think we are in a new era of damaging winds. Note that Juan took larg=
e trees and spared medium trees. With regard to canopy protection this no d=
oubt helps but if trees grow with space they are better anchored than trees=
which grow crowded.
Yt, DW
----- Original Message -----
From: Dusan Soudek <mailto:soudekd@ns.sympatico.ca>
To: naturens@chebucto.ns.ca
Sent: Monday, February 08, 2016 9:28 AM
Subject: Re: [NatureNS] two trees to buy a pizza or would we rather a car w=
ith the same two trees?
=EF=BB=BF To Donna, David, et al;
one of the obvious way trees in a forest cooperate is protection against st=
rong winds. A solitary tree is unlikely to withstand windstorms, a forest w=
ith 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 sm=
aller trees, often their conspecifics and even their own descendants. Of th=
e millions and millions of seeds a mature tree will produce over its lifeti=
me, on the average only one will reach maturity...
Dusan Soudek
On February 8, 2016 at 8:21 AM David & Alison Webster <dwebster@glinx.com> =
wrote:
Hi Donna & All, Feb 8, 2016
The book, The Hidden Life of Trees, should be interesting reading.
But there is nothing mysterious about "...for reasons unknown, keep the=
ancient stumps of long-felled companions alive for centuries by feeding th=
em a sugar solution through their roots.=E2=80=9D This is root grafting pra=
cticed by Spruce sometimes, Hemlock always, Fir sometimes and Norway Maple.=
Root grafting is I suspect a reflection of somewhat hostile soil condit=
ions 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 o=
f tree A meets one of tree B they sometimes (always ?) unite and form a 2-w=
ay link.
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 -----
From: Donna Crossland <mailto:dcrossland@eastlink.ca>
To: naturens@chebucto.ns.ca
Sent: Sunday, February 07, 2016 9:11 PM
Subject: [NatureNS] two trees to buy a pizza or would we rather a car with =
the same two trees?
This forest article was forwarded to me by Jon Percy. Bob Bancroft has als=
o circulated around to some, but it is worth ensuring that everyone sees it=
=2E
http://www.nytimes.com/2016/01/30/world/europe/german-forest-ranger-finds-t=
hat-trees-have-social-networks-too.html?hp <http://www.nytimes.com/2016/01/=
30/world/europe/german-forest-ranger-finds-that-trees-have-social-networks-=
too.html?hp&action=3Dclick&pgtype=3DHomepage&clickSource=3Dstory-heading&mo=
dule=3Dsecond-column-region®ion=3Dtop-news&WT.nav=3Dtop-news&_r=3D0> &ac=
tion=3Dclick&pgtype=3DHomepage&clickSource=3Dstory-heading&module=3Dsecond-=
column-region®ion=3Dtop-news&WT.nav=3Dtop-news&_r=3D0
The parts I enjoyed-
=E2=80=9C in nature, trees operate less like individuals and more as commun=
al beings. Working together in networks and sharing resources, they increas=
e 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 e=
lectrical signals across a fungal network known as the =E2=80=9CWood Wide W=
eb=E2=80=9D; and, for reasons unknown, keep the ancient stumps of long-fell=
ed 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 th=
an as a simple entity to mow down for relatively low profit, this way of de=
scribing 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
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
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
------=_NextPart_000_003C_01D16269.3061D0E0
Content-Type: text/html;
charset="utf-8"
Content-Transfer-Encoding: quoted-printable
<html xmlns:v=3D"urn:schemas-microsoft-com:vml" x