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Hi Nick,
Where were floodplains converted to agriculture in NS ? A smattering =
in NB but none is NS that I am aware of. Some Salmon River floodplains =
were mined for gravel when the 100 series highways were built near there =
and I think some floodplains near Oxford were mined.=20
Floodplains are enriched by the silt deposited by floodwaters each =
year; e.g. Nile, Tigrus not by trees which may take advantage of the =
enriched soil.
Yt, DW
----- Original Message -----=20
From: Nicholas Hill=20
To: naturens@chebucto.ns.ca=20
Sent: Monday, February 08, 2016 2:53 PM
Subject: Re: [NatureNS] two trees to buy a pizza or would we rather a =
car with the same two trees?
Hey John
yes tree roots are purported to be amazing N and P pumps and can take =
up nutrients before they reach waterways..90% range according to Maltby =
who was working on big rivers of Europe.
when you lose trees you lose these pumps and go to lower functional =
states and herbaceous plants arent a lick on trees.
The tree was an engineer of floodplains in big ways and we lost a lot =
of that when we converted floodplain for agriculture. This floodplain =
forest is what supports a good group of the Appalachian Deciduous Forest =
species..bloodroot, blue cohosh Canada violet (?) wild coffee, Canada =
Lily, wild garlic, yellow violets, toothwort, Solomon's plume..and this =
is the habitat we need right now to let us preserve the diversity that =
is expanding northward and may be eliminated from Kentucky in time. I'm =
looking forward to being able to eat pawpaws, crush spicebush leaves and =
swing on forest grape vines in my nineties in Nova Scotia but first we =
need to secure and restore floodplain habitat.
must be midwinter=20
On Mon, Feb 8, 2016 at 2:05 PM, David & Alison Webster =
<dwebster@glinx.com> wrote:
Hi John & All,
Any deep-rooted plant will move nutrients to the surface if that =
is what you mean. Grasses are in general better than trees because their =
fine roots can penetrate the pores of rigid soils not accessible to tree =
roots. This is why Agropyron repens (Couch) is such a vigorous weed. And =
why the fertility of Prairie soil is immense.
Yt, DW
----- Original Message -----=20
From: John and Nhung=20
To: naturens@chebucto.ns.ca=20
Sent: Monday, February 08, 2016 12:06 PM
Subject: RE: [NatureNS] two trees to buy a pizza or would we =
rather a car with the same two trees?
When I was a CUSO volunteer in Northeast Thailand, thirty-odd =
years ago, our country Director (a soil scientist by training) called =
trees =E2=80=9Cnutrient pumps.=E2=80=9D =20
Made eminent sense in an area with terrible soils, with minimal =
organic content.
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 with 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 mature trees of pines and hemlock. We saw the =
strips of tree felling from the microbursts that we called the Berwick =
Blow of a few winters ago that took out 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 it not possible to ski in =
the adjacent uncut property over a 40m width due to blow down.=20
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 =
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
On February 8, 2016 at 8:21 AM David & Alison Webster =
<dwebster@glinx.com> wrote:=20
Hi Donna &