REP40295

• Permit No: M1974015
• IBM Index Class Name: Report
• Doc Date: 3/3/1977
• From: DOW
• To: REX
• Media Type: D
• Archive: No

• 1:1 •
and some modification of habitat; associated predator
control can be expected to influence carnivore populations.
(4) Current gravel extraction operations on the Weng property to
the north, channelization of the St. Vrain River, ar,d
widening of State Highway 6b just to the north of the St.
Vrain River, are together creating a barrier between the
Hennigh and Ziegle properties and the wilder foothill country
north of the St. Vrain River,
The net result of all of these processes is that the Henn.Lgh and
Licgle properties are progressively becoming more isolated, in a
biological sense, especially in reference to the more free-ranging
species of mammals, such as the larger carnivores, and the cer~~ids. At
t;ie same time, these processes contribute to a general deterioration of
cover, affecting most species of mammals, even the relatively ;sedentary
species. ,If present trends in land use were to continue, it seems
likely that populations of most species of mammals on the Henni.gh and
Ziegle properties either would continue to decline, or, at best, would
rc~~in about stable. Few, if any, species, other than perhaps the House
::o.:se and Norway Rat, would be likely to increase in numbers.
LITERATf]RE CITED
Ar~.stroiig, David !f. 1972. Distribution of mammals in Colorado. Univ.
I:an'sas ;fus. Nat. His t., Plonog. No. 3. 415 pp.
Prc;pared by: A. T. Cringan, January 4, 1974, Fort Collins, Colorado.