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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Interactions between climate, beaver activity, and pond occupancy by the cold-adapted mink frog in New York State, USA  [2009]

Popescu, Viorel D.; Gibbs, James P.;

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Mink frogs (Rana septentrionalis) are cold-adapted, climate-sensitive amphibians occurring above the 43rd parallel in North America. We conducted repeated night call surveys at 46 ponds near the southern edge of the species' range to collect presence/absence data and used information-theoretic models to relate pond occupancy to historical climate and habitat factors. Mink frog occurrence was strongly and positively influenced by pond size (>1.5ha) and the presence of beavers (Castor canadensis). Presence of calling mink frogs decreased sharply at sites with historical mean July air temperatures >19.5°C. Our results suggest that predicted changes in temperature over the next century might reduce the range of mink frogs in New York, yet we hypothesize that any such reductions could be mitigated by generation of suitable breeding habitat associated with future expansion of beaver populations.
From the journal
Biological conservation
ISSN : 0006-3207

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
142
Issue:
10
Start Page:
2059
End Page:
2068
Publisher:
Kidlington, Oxford: Elsevier Science Ltd.
All titles:
"Interactions between climate, beaver activity, and pond occupancy by the cold-adapted mink frog in New York State, USA"@eng
Other:
"Includes references"
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
142
Issue:
10
Start Page:
2059
End Page:
2068
Publisher:
Kidlington, Oxford: Elsevier Science Ltd.
All titles:
"Interactions between climate, beaver activity, and pond occupancy by the cold-adapted mink frog in New York State, USA"@eng
Other:
"Includes references"