Life History Characteristics of Populations of the Long-toed Salamander (Ambystoma macrodactylum) from Different Altitudes

Howard, James H.; Wallace, Rick L.

doi:10.2307/2425582

Cited by 45 publications

(48 citation statements)

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“…& Marx, 2002;Welsh et al, 2006;Pearson & Goater, 2008). The habitat requirements of fish and A. macrodactylum overlap at high elevations in the northern Rocky Mountains (Howard & Wallace, 1985;Pilliod & Peterson, 2001;Pearson & Goater, 2008). In particular, fish and salamander larvae both require deeper water bodies (> 2 m) at higher elevations to survive winter.…”

Section: Discussionmentioning

confidence: 99%

Non‐native salmonids affect amphibian occupancy at multiple spatial scales

Pilliod

Hossack

Bahls

et al. 2010

Diversity and Distributions

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Aim The introduction of non‐native species into aquatic environments has been linked with local extinctions and altered distributions of native species. We investigated the effect of non‐native salmonids on the occupancy of two native amphibians, the long‐toed salamander (Ambystoma macrodactylum) and Columbia spotted frog (Rana luteiventris), across three spatial scales: water bodies, small catchments and large catchments.Location Mountain lakes at ≥ 1500 m elevation were surveyed across the northern Rocky Mountains, USA.Methods We surveyed 2267 water bodies for amphibian occupancy (based on evidence of reproduction) and fish presence between 1986 and 2002 and modelled the probability of amphibian occupancy at each spatial scale in relation to habitat availability and quality and fish presence.Results After accounting for habitat features, we estimated that A. macrodactylum was 2.3 times more likely to breed in fishless water bodies than in water bodies with fish. Ambystoma macrodactylum also was more likely to occupy small catchments where none of the water bodies contained fish than in catchments where at least one water body contained fish. However, the probability of salamander occupancy in small catchments was also influenced by habitat availability (i.e. the number of water bodies within a catchment) and suitability of remaining fishless water bodies. We found no relationship between fish presence and salamander occupancy at the large‐catchment scale, probably because of increased habitat availability. In contrast to A. macrodactylum, we found no relationship between fish presence and R. luteiventris occupancy at any scale.Main conclusions Our results suggest that the negative effects of non‐native salmonids can extend beyond the boundaries of individual water bodies and increase A. macrodactylum extinction risk at landscape scales. We suspect that niche overlap between non‐native fish and A. macrodactylum at higher elevations in the northern Rocky Mountains may lead to extinction in catchments with limited suitable habitat.

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Section: Discussionmentioning

confidence: 99%

Non‐native salmonids affect amphibian occupancy at multiple spatial scales

Pilliod

Hossack

Bahls

et al. 2010

Diversity and Distributions

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“…A proximate reason, why spring breeders performed on average better in these traits, may be the 4 to 8 weeks earlier metamorphosis and the subsequently prolonged post-metamorphic growth before their first hibernation (Sinsch et al, 1999). The delayed emergence of summer metamorphs and small size at hibernation can result in slower postmetamorphic growth rates and delays in reaching the minimum size needed to attain sexual maturity as well as lower size-related survival traits of metamorphs (Berven, 1982;Berven and Gill, 1983;Hemelaar, 1988;Howard and Wallace, 1985;Morrison and Hero, 2002). As the temporal preference of breeding is rather stable in German natterjack populations (this study, Sinsch and Seidel, 1995) and the average number of eggs per female and year is about the same in both cohorts (Sinsch and Keltsch, 2002), we conclude that lifetime fecundity of the summer cohort females was lower than that of spring cohort females due to the lower longevity.…”

Section: Variation Among Cohortsmentioning

confidence: 99%

Demographic life history traits of reproductive natterjack toads (Bufo calamita) vary between northern and southern latitudes

Leskovar¹,

Oromí

Sanuy³

et al. 2006

Amphib Reptilia

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Demographic life history traits were investigated in three Bufo calamita populations in Germany (RhinelandPalatinate: Urmitz, 50 • N;1998-2000 and Spain (Catalonia: Balaguer, Mas de Melons, 41 • N;. We used skeletochronology to estimate the age as number of lines of arrested growth in breeding adults collected during the spring breeding period (all localities) and during the summer breeding period (only Urmitz). A data set including the variables sex, age and size of 185 males and of 87 females was analyzed with respect to seven life history traits (age and size at maturity of the youngest first breeders, age variation in first breeders, longevity, potential reproductive lifespan, median lifespan, age-size relationship). Spring and summer cohorts at the German locality differed with respect to longevity and potential reproductive lifespan by one year in favour of the early breeders. The potential consequences on fitness and stability of cohorts are discussed. Latitudinal variation of life history traits was mainly limited to female natterjacks in which along a south-north gradient longevity and potential reproductive lifespan increased while size decreased. These results and a review of published information on natterjack demography suggest that lifetime number of offspring seem to be optimized by locally different trade-offs: large female size at the cost of longevity in southern populations and increased longevity at the cost of size in northern ones.

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“…Physiological and life history trait variation in response to local climatic conditions (i.e. associated with elevation) has been demonstrated within several of the long-toed salamander lineages (Anderson, 1967(Anderson, , 1972Howard et al, 1983;Howard & Wallace, 1985), and thus, divergence along climatic axes may be important in this otherwise morphologically similar group. Using tests of niche overlap, we first ask whether the different lineages of long-toed salamander have diverged in their climatic niches or, alternatively, demonstrate niche conservatism.…”

Section: Introductionmentioning

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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Life History Characteristics of Populations of the Long-toed Salamander (Ambystoma macrodactylum) from Different Altitudes

Cited by 45 publications

References 0 publications

Non‐native salmonids affect amphibian occupancy at multiple spatial scales

Non‐native salmonids affect amphibian occupancy at multiple spatial scales

Demographic life history traits of reproductive natterjack toads (Bufo calamita) vary between northern and southern latitudes

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)

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