Tulitptree Range in the Northeast   Ray Weber
  Sep 23, 2007 06:30 PDT 

TOPIC: Tuliptree regeneration

== 1 of 2 ==
Date: Tues, May 13 2008 9:01 pm
From: John Eichholz

Hi All,

Just a quick note to those who are following such things. I have found
a second tuliptree reproducing in northern Franklin County. Both have
seed sources in planted tuliptrees, but are clearly the result of
natural regeneration. One is right next to the Mohawk trail in
Shelburne, and one is in the Arms Cemetery, also in Shelburne.

The most northerly population of Tuliptrees in this area has been
thought to exist in Whately, about 15 miles south of here.

A question: What would be a good definition of a tree becoming
naturalized? Reproduction from a natural seedling, or from a planted tree?

John Eichholz

== 2 of 2 ==
Date: Tues, May 13 2008 9:30 pm
From: "Edward Frank"


Since they are naturally reproducing, I suppose they potentially could be considered naturalized. But that would require they be non-native to the area in which they are reproducing. This close to their natural range boundary, I would wonder if they might simply be thought of as at the boundary of their range rather than naturalized, even though their seed source is a planted tree. Native range boundaries are kind of fuzzy.

The USDA Natural Resource Conservation Service http://www.ct.nrcs.usda.gov/plant_definitions.html says:
Naturalized Plant
A non-native plant that does not need human help to reproduce and maintain itself over time in an area where it is not native. Notes: Even though their offspring reproduce and spread naturally (without human help), naturalized plants do not, over time, become native members of the local plant community. Many naturalized plants are found primarily near human-dominated areas; and, sometimes, naturalized is used (confusingly) to refer specifically to naturally reproducing, non-native plants that do not invade areas dominated by native vegetation. However, since invasive plants also reproduce and spread without human help, they also are naturalized - invasives are a small, but troublesome, sub-category of naturalized plants.

Translocated Plant
A plant not native to the portion of the continent where it is now found. (California Poppies in New England are an example of a translocated species.)

TOPIC: Tuliptree regeneration

== 1 of 4 ==
Date: Wed, May 14 2008 11:54 am
From: "Edward Frank"

John, ENTS,

It makes you wonder about the range of the tuliptree. 1) Did it previously have a larger range, but has been extirpated from part of it by human activities - logging, farming, urbanization; 2) Has the range been changed or expanded by global warming, or 3) perhaps it was able to grow in these areas before but did not establish itself because of competition with other trees, or because of some longer term cyclic climatic limitation - such as infrequent periods of weather too cold for survival of tuliptrees.


== 2 of 4 ==
Date: Wed, May 14 2008 1:33 pm
From: ForestRuss@aol.com


I think that the tendency for that region to have late spring frosts that
can be severe may have created a biological limitation for tulip trees to grow
much further north because of the flowers getting killed so frequently. When
you mix in considerations related to the hard core agrarian past of the
Connecticut and Deerfield River Valleys and millions of sheep on the
hillsides.... small populations of tasty yellow poplar sprouts might not have had a
fighting chance.

I bet you can grow them in St. Johnsbury, Vermont by now!


== 3 of 4 ==
Date: Wed, May 14 2008 6:59 pm
From: "Gary A. Beluzo"

Ed, John, and Russ,

I have documented a small naturally reproducing population of
Liriodendron in Keene, NH. There are NO other trees in evidence in
the nearby area. I am working to find out if they may have been
intentionally planted in the past, escaped from plantings nearby,
seeds were transported there (by hurricane, etc) and are now able to
germinate because of warmer years? We may never know for sure.

I am also followng up leads to other remote populations north of
Massachusetts. For example, near Bennington, VT there are streets,
buildings, businesses, etc with the name "Tulip Tree" and on old
distribution maps an outlying "dot" is shown in that area...


== 4 of 4 ==
Date: Wed, May 14 2008 7:00 pm
From: "Gary A. Beluzo"

They may have been native to the area during the hypsithermal and have
moved further south since then, except for small isolated populations.
Now with global warming they may be moving back north to "fill in" the
present voids.


Ill let Gary comment on most of this, my observations are limited to the
Robinson Park site.

We noted a considerable ammount of regeneration taking place at
Robinson. We did counts and noted the size and placement of saplings and
seedlings in several areas. One thing notable, there are 3 examples of
where Tulip have taken over very small canopy openings, and caused red
maple attending and competing to lose the battle.

Clearly the participants on this list down south are correct, they are
quite aggressive and not going to be affected by red maple presence if
its there.

We are noting their presence further and further from the long time old
stands in the ravines. They are popping up some amazing distances from
these seed sources.

Clearly since some of these are not that old, the disturbance required
to generate them appearx to be not that significant, possibly
contributed to by atmospheric warming. There is no evidence of them
regenerating in this manner in the past, and spreading from the older
stand locations.

Although Bob and Gary may have updated info, the stands at Robinson Park
are clearly the best in Massaschusetts, and likely the Northeast. In my
view no man made experiments with silviculture should take place if
there is natural success.

Ray Weber

Edward Frank wrote:

I realize you are just getting started with the bulk of your fieldwork
concerning tuliptree populations, but do you have any preliminary ideas
you would like to share with us? has the range of the tuliptrees in the
northeast been changing over the past couple centuries? Was it once
wider spread with these fringe or outlier populations lost through
logging in the past? Is the tuliptree range growing northward at the
present time, maybe related to climatic changes? Is the range
relatively stable and the more northward examples you have found simply
ones that have not been documented before? It is a rapidly growing tree
under many conditions, so I would expect it would be capable of
expanding its range relatively rapidly if the conditions were to allow
it to do so. I am just curious how your research is coming and what you
seem to be finding.