|Scientific Name:||Pseudacris triseriata (Wied-Neuwied, 1838)|
|Taxonomic Source(s):||Frost, D.R. 2015. Amphibian Species of the World: an Online Reference. Version 6.0. New York, USA. Available at: http://research.amnh.org/herpetology/amphibia/index.html.|
|Taxonomic Notes:||A molecular phylogeny of Pseudacris based on mtDNA data (Moriarty and Cannatella 2004) revealed four strongly supported clades within Pseudacris: (1) A West Coast Clade containing regilla and cadaverina, (2) a Fat Frog Clade including ornata, streckeri, and illinoensis, (3) a Crucifer Clade consisting of crucifer and ocularis, and (4) a Trilling Frog Clade containing all other Pseudacris. Within the Trilling Frog Clade, brimleyi and brachyphona form the sister group to the Nigrita Clade: nigrita, feriarum, triseriata, kalmi, clarkii, and maculata. The Nigrita Clade shows geographic division into three clades: (1) populations of maculata and triseriata west of the Mississippi River and Canadian populations, (2) southeastern United States populations of feriarum and nigrita, and (3) northeastern United States populations of feriarum, kalmi, and triseriata. Moriarty and Cannatella (2004) found that subspecific epithets for crucifer (crucifer and bartramiana) and nigrita (nigrita and verrucosa) are uninformative, and they therefore discouraged recognition of these subspecies. They concluded that further study is needed to determine if illinoensis warrants status as a distinct species. Molecular data were consistent with retention of regilla, cadaverina, ocularis, and crucifer in the genus Pseudacris.
Using mtDNA samples from a large number of localities throughout North America, Lemmon et al. (2007) elucidated the phylogenetic relationships and established the geographic ranges of the trilling chorus frogs (Pseudacris). They redefined the ranges of several taxa, including P. maculata, P. triseriata, and P. feriarum; found strong evidence for recognizing P. kalmi as a distinct species; and discovered a previously undetected species in the south-central United States (now known as Pseudacris fouquettei). Based on mtDNA data, Pseudacris maculata and P. clarkii did not emerge as distinct, monophyletic lineages but, given the degree of morphological and behavioural divergence between the taxa, Lemmon et al. (2007) chose to recognize them as separate species, until further data suggest otherwise.
|Red List Category & Criteria:||Least Concern ver 3.1|
|Assessor(s):||IUCN SSC Amphibian Specialist Group|
|Facilitator/Compiler(s):||Sharp, D. & Hobin, L.|
Listed as Least Concern in view of its wide distribution, tolerance of some forms of habitat alteration and presumed large population size, despite potential population declines.
|Previously published Red List assessments:|
|Range Description:||Range includes portions of southeastern Canada and the northeastern United States, from Michigan (Lower Peninsula), southern Ontario, and western New York through Indiana, Ohio, and western Pennsylvania to southern Illinois, western Kentucky, and northwestern Tennessee (Lemmon et al. 2007).|
Native:Canada (Ontario); United States (Illinois, Indiana, Kentucky, Michigan, New York, Ohio, Pennsylvania, Tennessee)
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||This species is represented by a large number of sub-populations. Total adult population size is unknown but presumably exceeds 100,000. This frog is common in much of its large range.|
Over the long term, area of occupancy, number of sub-populations, and population size probably have declined, but the degree of decline is uncertain. Minton (2001) stated that this species was numerous in Indiana in 1945-1970, declined markedly during 1975-1985, and apparently has increased since then. In discussing P. triseriata and P. maculata as a single species, Gibbs et al. (2007) cited declines in New York state during the period 1970-2000. Moriarty and Lannoo (in Lannoo 2005) also cited declines in the northeastern United States and adjacent Canada.
Area of occupancy, number of sub-populations, and population size probably are slowly declining, but the rate of decline is unknown.
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||Habitats include damp meadows, marshes, forest edges, bottomland swamps, and temporary ponds, particularly in open country (Minton 2001, Gibbs et al. 2007). Formerly this frog was plentiful in agricultural and suburban situations in Indiana, but this is no longer the case (Minton 2001). Winter is spent underground or under surface cover. Breeding sites include quiet, shallow, usually temporary water with submerged and low emergent vegetation, especially rain-flooded meadows and ditches and temporary ponds in floodplains (Minton 2001, Gibbs et al. 2007).|
|Use and Trade:||There are no records of this species being utilized.|
|Major Threat(s):||These frogs are tolerant of some forms of habitat alteration (e.g. clearing of forest), but loss of wetlands, and unknown factors (possibly including agricultural chemicals, drought, and chytrid fungus) have caused declines in some areas (Gibbs et al. 2007). Forest expansion by re-forestation of abandoned agricultural lands my also pose a threat, as secondary succession in some areas has rendered breeding habitat inappropriate (Shelley et al. 1999).|
Many occurrences are in protected areas.
In view of reported declines and taxonomic changes affecting the scope of the species, determination of current taxonomic and population status is appropriate.
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Lemmon, E. M., A. R. Lemmon, J. T. Collins, J. A. Lee-Yaw, and D. C. Cannatella. 2007. Phylogeny-based delimitation of species boundaries and contact zones in the trilling chorus frogs (Pseudacris). Molecular Phylogenetics and Evolution 44: 1068-1082.
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Platz, J.E. 1989. Speciation within the chorus frog Pseudacris triseriata: morphometric and mating call analyses of the boreal and western subspecies. Copeia: 704-712.
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Spencer, A.W. 1964. The relationship of dispersal and migration to gene flow in the boreal chorus frog. Ph.D. Dissertation, Colorado State University, Fort Collins, Colorado.
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|Citation:||IUCN SSC Amphibian Specialist Group. 2015. Pseudacris triseriata. The IUCN Red List of Threatened Species 2015: e.T55899A78907820.Downloaded on 23 September 2017.|
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