The Geographic Variation of Ambystoma macrodactylum Baird, with the Description of Two New Subspecies

Ferguson, Denzel E.

doi:10.2307/2422958

Cited by 23 publications

(24 citation statements)

References 12 publications

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“…Early naturalists subdivided the widespread range of the long-toed salamander into five subspecies on the basis of slight differences in colour pattern and various allometric measurements (reviewed by Ferguson, 1961), but, in the absence of rangewide sampling, based the boundaries between subspecies on geophysical barriers. Several authors have since evaluated the validity of the subspecies and clarified lineage boundaries using a variety of genetic markers.…”

Section: Delineating Lineage Boundariesmentioning

confidence: 99%

The importance (or lack thereof) of niche divergence to the maintenance of a northern species complex: the case of the long‐toed salamander (Ambystoma macrodactylum Baird)

Lee‐Yaw

Irwin

2015

J of Evolutionary Biology

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The relative importance of ecological vs. nonecological factors for the origin and maintenance of species is an open question in evolutionary biology. Young lineages -such as the distinct genetic groups that make up the ranges of many northern species -represent an opportunity to study the importance of ecological divergence during the early stages of diversification. Yet, few studies have examined the extent of niche divergence between lineages in previously glaciated regions and the role of ecology in maintaining the contact zones between them. In this study, we used tests of niche overlap in combination with ecological niche models to explore the extent of niche divergence between lineages of the long-toed salamander (Ambystoma macrodactylum Baird) species complex and to determine whether contact zones correspond to (divergent) niche limits. We found limited evidence for niche divergence between the different long-toed salamander lineages, substantial overlap in the predicted distribution of suitable climatic space for all lineages and range limits that are independent of niche limits. These results raise questions as to the importance of ecological divergence to the development of this widespread species complex and highlight the potential for non-ecological factors to play a more important role in the maintenance of northern taxa.

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Section: Delineating Lineage Boundariesmentioning

confidence: 99%

The importance (or lack thereof) of niche divergence to the maintenance of a northern species complex: the case of the long‐toed salamander (Ambystoma macrodactylum Baird)

Lee‐Yaw

Irwin

2015

J of Evolutionary Biology

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“…Two potential predators of A. m. columbianum common to the study area are garter snakes (Thamnophis sirtalis and T. elegans; Ferguson, 1961) and shrews (Sorex sp. ; Shoop and Doty, 1972 to migrate through this area due to chance alone.…”

Section: Study Areamentioning

confidence: 99%

“…The long-toed salamander, Ambystoma macrodactylum, is a widely distributed western ambystomatid for which five subspecies are currently recognized (Ferguson, 1961). Life history traits among the five subspecies vary according to season, habitat and elevation (Anderson, 1967;Ferguson, 1961;Howard, 1979), yet little quantitative data on their population dynamics and breeding migrations are presently available.…”

mentioning

confidence: 99%

“…Life history traits among the five subspecies vary according to season, habitat and elevation (Anderson, 1967;Ferguson, 1961;Howard, 1979), yet little quantitative data on their population dynamics and breeding migrations are presently available. The purposes of our study are to: 1) characterize the general migratory patterns during the breeding season, 2) evaluate the relationship between migratory events and pertinent environmental parameters and 3) quantitatively assess the population structure (population size, sex ratios, etc.)…”

mentioning

confidence: 99%

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Demography and Migratory Patterns of the Eastern Long-Toed Salamander, Ambystoma macrodactylum columbianum

Beneski¹,

Zalisko²

1986

Copeia

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“…Garter snakes (Thamnophis sp.) (Ferguson 1961), non-native fish (Tyler et al 1998;Monello and Wright 2001), Northwestern Salamanders (A. gracile) (Hoffman and Larson 1999), conspecific larvae (Walls et al 1993), giant water bugs (Lethocerus sp.) (CAP, personal observation), and dytiscid water beetles (Pilliod and Fronzuto 2005) consume larval Long-toed Salamanders.…”

mentioning

confidence: 99%

Apparent Predation by Gray Jays, <em>Perisoreus canadensis</em>, on Long-toed Salamanders, <em>Ambystoma macrodactylum</em>, in the Oregon Cascade Range

Murray

Pearl²,

Bury³

2005

Can Field Nat

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We report observations of Gray Jays (Perisoreus canadensis) appearing to consume larval Long-toed Salamanders (Ambystoma macrodactylum) in a drying subalpine pond in Oregon, USA. Corvids are known to prey upon a variety of anuran amphibians, but to our knowledge, this is the first report of predation by any corvid on aquatic salamanders. Long-toed Salamanders appear palatable to Gray Jays, and may provide a food resource to Gray Jays when salamander larvae are concentrated in drying temporary ponds.

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The Geographic Variation of Ambystoma macrodactylum Baird, with the Description of Two New Subspecies

Cited by 23 publications

References 12 publications

The importance (or lack thereof) of niche divergence to the maintenance of a northern species complex: the case of the long‐toed salamander (Ambystoma macrodactylum Baird)

The importance (or lack thereof) of niche divergence to the maintenance of a northern species complex: the case of the long‐toed salamander (Ambystoma macrodactylum Baird)

Demography and Migratory Patterns of the Eastern Long-Toed Salamander, Ambystoma macrodactylum columbianum

Apparent Predation by Gray Jays, <em>Perisoreus canadensis</em>, on Long-toed Salamanders, <em>Ambystoma macrodactylum</em>, in the Oregon Cascade Range

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