camp ripley and arden hills minnesota army national guard training ...

Average Index Value per Stop
Figure 63. Average anuran index value during the first survey period at Camp Ripley, 1994-2009.
Surveys were not conducted during 2008.
3
2.5
2
1.5
1
0.5
0
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Since 1993, the third survey period frequently has not been surveyed due to training
restrictions and weather constraints. The same species of frogs were located during the third
survey period as in 2002, 2005, and 2007, the most recent years the routes have been available.
In 2009, the green frog (Rana clamitans), gray treefrog, Cope‟s gray treefrog indices were higher
than any previous years (1995, 1996, 2001, 2002, 2005, and 2007) during the third survey period.
(Table 17). Mink frogs (Rana septentrionalis) were not heard during 2009. Since 1995 they have
been documented in five of seven survey years (1995, 1996, 2002, 2005, and 2007), but were not
documented during the 2001 survey.
Fewer spring peepers and gray treefrogs have been heard on statewide routes for the last
few years (MNDNR 2005, Monstad 2006, MNDNR 2007), which corresponds with Camp Ripley
data from the first survey period in 2007, but not the second survey period. Statewide results
were not available for 2009 at the time of publication of this document.
Page 93
Year
Wood Frog Boreal (Western) Chorus Frog Spring Peeper Northern Leopard Frog
2009 Conservation Program Report