Minnesota Frog and Toad Calling Survey

OBJECTIVE/PURPOSE OF PROJECT:

The Minnesota Frog and Toad Calling Survey (MFTCS) an ongoing state-wide study of Minnesota's frogs and toads - and includes over 20 routes on the Superior National Forest. The purpose of this monitoring is to provide information on where species are located throughout the state and how their populations change in abundance and distribution.

METHODS OR TECHNIQUES USED:

The MFTCS protocol has been developed based on the North American Amphibian Monitoring Program protocol and is outlined at: http://www.dnr.state.mn.us/volunteering/frogtoad_survey/proto col.html Each route is run three times to cover early spring, late spring, and summer. Surveys are run after dark, under favorable conditions. On each route, at ten stops, surveyors note all frogs and toads heard in a minimum 5-minute listening period. All data are recorded and sent to MN DNR Nongame Wildlife Program to be compiled and analyzed.

REALIZED/EXPECTED RESULTS:

A summary of results from 1994-2007 is attached. The 2008 report will be available early 2009. In 2007, 153 routes were run and the corresponding data sheets were returned the DNR. These routes were distributed statewide, which demonstrates how the MFTCS benefits from it’s large base of volunteers. While another year of atypical weather makes interpretation difficult, statewide population trends continue to be statistically significant for three species: the gray treefrog (Hyla versicolor), spring peeper (Pseudacris crucifer), and the American bullfrog (Rana catesbeiana) Spring peeper and gray treefrog –1998- 2007 data showed a detectable decrease in the proportion of stops at which the gray treefrog and spring peeper were heard statewide. American bullfrog – The American bullfrog was the only species that was heard in significantly more stops statewide during the period 1998-2007. This species is considered invasive everywhere in the state except for it's native range in the southeastern corner of the state.

LINKS TO SITES:

http://www.dnr.state.mn.us/volunteering/frogtoad_survey/index.html

AGREEMENT TYPE(S):

Participating

PRIMARY PARTNER LIST:

Minnesota Department of Natural Resources





https://www.fs.usda.gov/detail/superior/landmanagement/resourcemanagement/?cid=stelprdb5209850