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jean_thie
Cartographer

Reged: 12/06/06
Posts: 94
Loc: Ottawa, Canada

Beavers, Beavers, Everywhere!

03/24/07 06:19 PM

View in Google Earth View in Google Maps (1001 downloads)

This shows a typical example how beavers manage water in wetlands in Northern Canada when they are relatively undisturbed. The image below gives a simple interpretation of the area. This area is part of the northern edge of the Boreal zone. Pieces of precambrian bedrock are visible as "islands" in a large wetland area. Most of the watermovement is in the form of "ground water" flows in the wetlands, and the beavers had to build extensive dams to contain the flow.

Beavers are typically boreal and temperate species surrounded by trees which provide a good food supply. The Northern Limit of the Beavers is interesting since beavers seem to follow climate warming trends (not just the last decades, but and are migrating north since the little ice age, the last period of climate cooling a few hundred years ago). With the acceleration in warming, the rate of migration into the subartcic may accellerate along the rivers and streams where they live of willow and alder.
Apparently Moose and Red Fox are also moving into the subarctic, but their "foot print" is not visible on a satellite image. Google Earth with its incredible ability to scale into high resolution detail makes beaver activity and possibly its migration north "mappable"

I am working on a series of transects through Canada's north to establish a sort of baseline on the GE visible status of beaver . Results will be added to this thread on a regular basis. By the way, the typical beaver example above is at the green place mark of the image below which shows a series place marks for site I have looked at

http://www.geostrategis.com

--------------------
Jean Thie
Executive Director, Canadian Institute of Geomatics
www.geostrategis.com
Google Earth - An Exceptional Ecosystem Science Tool!
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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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