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jean_thie
Cartographer

Reged: 12/06/06
Posts: 96
Loc: Ottawa, Canada

Re: Exploring the Northern limit of beavers

03/27/07 09:15 PM

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Heamit,
Just to follow up on my earlier reply to you, I did a quick exploration of a small part of the northern edge of beaver distribution. The results are attached. This example shows a North- South transect which I quickly scanned in a strip of high resolution digital globe and terra metrics imagery. I started in the south and worked my way up. The most northern point of beaver observed is the last placemark. Most of this area is permafrost, peatplateaus in the south, peat polygones in the North. A sub arctic environment. A very meager food supply for beaver.

The orange colors represent wildland fires most 3-10 years old. The darker spot are fires that were burning during the year the images were taken. Some are burning - smoking in the high resolution strips.

I did my thesis fieldwork here over 30 years ago (Automated Interpreation of Satellite and Multi-spectral Airborne Imagery for Biophysical- Ecological Land Classification) Unfortunately I did not focus on beavers at that time. Too Bad.

More information on fire interpretation:

http://www.geostrategis.com/p_borealfires.htm

http://www.geostrategis.com

--------------------
Jean Thie
Executive Director, Canadian Institute of Geomatics
www.geostrategis.com
Google Earth - An Exceptional Ecosystem Science Tool!
Monitor Permafrost Melting with Google Earth
Fire Ecosystem Interpretations with Google Earth
Map Glacial lake Agassiz!
Find the longest beaver dam in the World with Google Earth!

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Subject	Posted by	Posted on
Beavers, Beavers, Everywhere!	jean_thie	03/24/07 06:19 PM
Re: Idaho watershed restoration?	begreen	10/23/07 09:53 PM
Re: Idaho watershed restoration?	jean_thie	10/27/07 10:10 AM
Re: Idaho watershed restoration?	begreen	11/04/07 12:36 PM
Re: Idaho watershed restoration?	begreen	11/04/07 01:14 AM
Re: Canada's Beaver Capital:	jean_thie	09/18/07 08:43 PM
Re: Canada's Beaver Capital:	jean_thie	09/19/07 05:50 AM
Re: Canada's Beaver Capital:	mspelto	09/21/07 07:30 AM
Re: Canada's Beaver Capital in 1945???	jean_thie	10/03/07 12:53 PM
Re: Canada's Beaver Capital:	Rambler24	09/19/07 02:23 AM
World's biggest beaver dam??	jean_thie	04/07/07 07:58 AM
Re: Beavers, Beavers, Everywhere!	gideonshorn	04/04/07 05:15 PM
Re: Beavers, Beavers, Everywhere!	Delta102	04/01/07 09:43 PM
Beavers, Beavers, Everywhere but in So Cal ?	Delta102	03/29/07 12:17 PM
Southern California Beavers in Temecula Creek ? DELETED	jean_thie	03/30/07 10:27 AM
Re: Southern California Beavers in Temecula Creek ?	Froggmann	12/23/07 09:03 PM
Re: Southern California Beavers in Temecula Creek ?	jean_thie	04/11/08 02:09 PM
Re: Southern California Beavers in Temecula Creek ?	Delta102	03/30/07 12:46 PM
Re: Southern California Beavers in Temecula Creek ?	mspelto	04/01/07 05:30 AM
Re: Southern California Beavers in Temecula Creek ?	Delta102	04/01/07 09:26 PM
Re: Beavers, Beavers, Everywhere!	LuciaM	03/29/07 02:23 AM
Beaver reintroduction - Hungary	syzygy	03/29/07 12:06 AM
Re: Water management by beavers	Delta102	03/27/07 06:50 AM
beaver pond cross section and beaver range in N.A	jean_thie	03/27/07 05:44 PM
Beavers in Montana	Delta102	03/27/07 06:20 PM
Re: Beavers in Montana	jean_thie	03/27/07 07:13 PM
Re: Beavers in Montana	Delta102	03/27/07 07:17 PM
Re: Beavers in Montana	jean_thie	03/28/07 08:29 AM
Re: Water management by beavers	heamit	03/27/07 05:57 PM
Re: Exploring the Northern limit of beavers	jean_thie	03/27/07 09:15 PM
Exploring Northern limit of beavers- Sub -arctic	jean_thie	04/04/07 06:30 AM
Re: Water management by beavers	jean_thie	03/27/07 06:37 PM
Re: Water management by beavers	mspelto	03/25/07 05:21 AM
Beavers on Carp Ridge near Ottawa, Canada	jean_thie	03/25/07 11:23 AM
Gatineau Park Beavers, Highest Concentration in Canada?	jean_thie	03/27/07 06:26 AM

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