Realm: Terrestrial
Climate: Temperate
Biome: Temperate broadleaf and mixed forests
Central latitude: 38.478010
Central longitude: -85.659980
Duration: 22 years, from 1994 to 2015

326615 records

65 distinct species

Across the time series Pseudacris crucifer is the most frequently occurring species

Methods

Routes were generated in a stratified random block design at USGS Patuxent Wildlife Research Center. Routes were then distributed to State Coordinators. These roadside routes were then groundtruthed to determine suitability (not too dangerous, not too noisy to hear) and stop placement. There were 10 stops per route, at least 0.5 miles apart, and located in/near wetland habitats. The wetland habitat was considered appropriate potential habitat (pond, vernal pool, roadside ditch, etc) during selection but the observed presence or absence of amphibians during or prior to selection was not used as a selection factor. Each state established three or four sampling periods to cover the calling phenology of its local species. States used three sampling periods, unless an additional period to target wood frogs was desired. The sampling periods were created to target the peak vocalization times (thereby increasing detection probability) for early-, mid- and late-season breeding amphibians and to assist observers in understanding when to collect data. States were permitted to adjust the sampling dates each year to account for an early or late arrival of the calling season. A survey should have begun 30 minutes after sunset or later, but some began before sunset. Appropriate sampling conditions are based upon wind, sky, and air temperature conditions to increase detection probability. Stops were surveyed in numerical order, in one night by one observer. We encouraged, but did not require, that one observer conduct all surveys of a route in a given year. Multiple observers were instructed to each fill out their own datasheet, separately and independently, if they surveyed routes at the same time. Observers recorded the time, sky code, and wind code, at the beginning and end of each survey to verify that the sampling conditions were met on the evening of the survey. At each stop, air temperature was recorded to verify that sampling conditions were met on the sampling night; at least eight of the 10 stops must meet temperature guidelines. Observers listened at each stop for 5 minutes, and reported each amphibian species heard calling. The 5 minute listening period had no initial waiting period. Starting in 2006, the observers also recorded the number of cars that passed during the listening period and whether the moon or moonlight was visible. The observer indicated whether background noise impaired his/her ability to hear. If there was a major noise disturbance, lasting one minute or longer, the observer broke the listening period to avoid sampling during the excessive noise. If such a time out was taken, this was noted on the datasheet. After the major disturbance ended, the observers resumed listening for the time remaining before the break.

Citation(s)

@Dataset{BioTIME_cit425, Study_id = {693}, Citation_id = {425}, Author = {Foreman, T.M. and Grant, E.H.C. and Weir, L.A}, Publisher = {U.S. Geological Survey data release}, Title = {North American Amphibian Monitoring Program (NAAMP) anuran detection data from the eastern and central United States (1994-2015)}, Year = {2017}, Doi = {10.5066/F7G44NG0}, Url = {https://www.sciencebase.gov/catalog/item/583dc314e4b0d1899f9dea8d}, Language = {English} }