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This is a generalized feature layer which indicates the approximate area of study for this journal article. Download is available through the link in the table, and Matawa members may request the download password by e-mailing fourriversrequests@matawa.on.ca.Abstract: Many acoustic surveys have been initiated to monitor anuran populations in North America. We used the Ontario Backyard Frog Survey to examine temporal and spatial trends, from 1994 to 2001. Our data suggest that there have been no consistent trends in site occupancy during this time period, but there were some differences among years. Both American toads and northern leopard frogs were more prevalent in 1995 than in 1994. Similarly, species richness was higher in 1995 and 1996 compared to most other years.Individual populations of species, however, often were not stable. Extinction and colonization rates varied among species, and ranged from 1.5 to 19.5% per year, and site occupancy was negatively correlated with extinction rates. Daily detection probabilities were often quite low, and were primarily driven by the perceived calling intensity. We recommend: (i) that monitoring programs attempt to preserve common survey routes, despite heavy turnover of volunteers, (ii) calling surveys be timed to maximize detection probabilities, and (iii) analyses based upon landscape features and GIS approaches should be used to determine localized changes in site occupancy or species richness.

Dataset Attributes

  • FID
    Number
  • Shape_Leng
    Number
    69.2819223564 to 69.2819223564
  • Shape_Area
    Number
  • TITLE
    Text
    {"value"=>"Population trends and calling phenology of anuran populations surveyed in Ontario estimated using acoustic surveys", "count"=>1} ()
  • PUBLISHER
    Text
    {"value"=>"Canadian Wildlife Service, Environment Canada", "count"=>1} ()
  • SOURCE
    Text
    {"value"=>"Biodiversity and Conservation (2006) 15:3481-3497", "count"=>1} ()
  • WEBSITE
    Text
    {"value"=>"https://www.dropbox.com/s/gqt35xwv59ngb27/2006_-_Shane_R_de_Solla_-_Population%20trends%20and%20calling%20phenology%20of%20a%20population.pdf?dl=0", "count"=>1} ()
  • CONTACT
    Text
    {"value"=>"fourriversrequests@matawa.on.ca", "count"=>1} ()

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