Ed,
Well that's a good point. Individual trees may not be able to adapt to a
changing climate even though their range is quite extensive. However if
tree nurseries can sell trees of a species that were grown in one
location from the same seed source all over a wide geographic area with
different environmental conditions and still thrive shouldn't that be a
good indicator that a species will do well despite a bit of climate
change? Trees are tough - they survive drought, floods, and all kinds of
abuse from humans so I'm sure they will adapt to a bit more heat, cold,
drought, or rain.
Mike
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Edward Frank
Sent: Tuesday, February 10, 2009 3:44 PM
To: [email protected]
Subject: [ENTS] Re: Birds are Moving North Too
Mike and Don,
I recognize that some trees have a wider geographical
distribution than others that this represents a greater tolerance of
environmental conditions for them as a species, but I am unsure if that
directly corresponds to an individual of that species or a particular
sub-population of that species being more tolerant than others in a
particular area. One proposition is not the logical extension of the
other. So managing to promote the increase of the numbers of these
trees that are more tolerant of change as a species, may not really
accomplish anything if the individual trees involved are not also more
tolerant of change. The questions are how much variation is there
between differing populations of a species in different parts of it
range, and could specimens from area of the populations range survive or
flourish in the environmental conditions found in a different portion of
the species range. I don't know the answer, but I can't reasonably make
the jump without any other evidence, that species with a broader range
are made up of individual trees or subpopulations that are more tolerant
of changing conditions.
Ed
----- Original Message -----
From: DON BERTOLETTE <mailto:[email protected]>
To: [email protected]
Sent: Tuesday, February 10, 2009 2:35 PM
Subject: [ENTS] Re: Birds are Moving North Too
Mike-
True words!
-Don
From: [email protected]
To: [email protected]
Subject: [ENTS] Birds are Moving North Too
Date: Tue, 10 Feb 2009 06:01:37 -0500
See
http://www.boston.com/news/science/articles/2009/02/10/amid_warming_bird
s_shift_north/
Birds as well as trees and forests will slowly adapt to
a warming planet or a cooling one too if that's the case.
For us foresters, it makes sense to promote those mid
tolerant to tolerant species that naturally tend to become dominants and
codominants with a wide range.
Around my neck of the woods that would be mostly red oak
and white pine. We can make forests more adaptable to climate change by
using the appropriate silviculture to increase the proportion of these
more adaptable species while also trying to keep our forests as diverse
as possible.
Man will adapt too; we always have.
Mike
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