Population size, structure and phenology of an endangered salamander at temporary and permanent breeding sites

Segev, Ori; Hill, Naomi; Templeton, Alan R.; Blaustein, Leon

doi:10.1016/j.jnc.2009.08.006

Cited by 23 publications

(16 citation statements)

References 51 publications

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“…Little is known about the prereproductive, terrestrial stage of S. infraimmaculata . Although adults show considerable fidelity to specific breeding sites (Warburg, , Segev et al ., ), it was found that females spread their progeny among different pools (Segev et al ., ) and there is some movement among breeding sites (Bar‐David et al ., ). Given the plan for more and larger urban environments, roads and industry in the region containing S. infraimmaculata , habitat destruction, degradation and fragmentation increases the concern over the species' status.…”

Section: Methodsmentioning

confidence: 99%

Genetic population structure of the endangered fire salamander (Salamandra infraimmaculata) at the southernmost extreme of its distribution

Blank

Sinai

Bar‐David

et al. 2012

Animal Conservation

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The negative effects of habitat fragmentation and population isolation on population viability, genetic variability and structuring are well documented, and conservation plans failing to take into account spatial population structure and connectivity can be ineffectual. Of special concern are populations at the periphery of the species range that might show reduced genetic diversity, thus affecting their adaptive potential at environmental margins. We investigated genetic variability and differentiation of the globally near threatened and locally endangered fire salamander Salamandra infraimmaculata in northern Israel, an area that represents the periphery of this species' distribution range. Analyses of variability in 15 microsatellite loci from 20 sites revealed substantial population structuring, most of which was due to a strong subdivision between two regions separated by a heavily urbanized valley. In addition, levels of genetic variability within populations were lowest in the peripheral, southernmost populations. These results suggest that the conservation plans for this species should recognize the lower diversity and increased divergence in the peripheral regions, and take into account the observed spatial population structure when devising strategies and measures to ensure the species persistence. bs_bs_banner Animal Conservation. Print ISSN 1367-9430 L. Blank et al. Population genetic structure of fire salamander Animal Conservation 16 (2013) 412-421

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Section: Methodsmentioning

confidence: 99%

Genetic population structure of the endangered fire salamander (Salamandra infraimmaculata) at the southernmost extreme of its distribution

Blank

Sinai

Bar‐David

et al. 2012

Animal Conservation

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“…A permanent or temporary hydroperiod of the larval habitat has been shown to be an important factor for population dynamics (Segev et al, 2010;Blank and Blaustein, 2014). Permanent streams are relatively rare in the range of S. infraimmaculata in Israel, but the first-order streams of the Tel Dan Nature Reserve resemble the permanent stream habitats of S. salamandra in Germany in that they have permanently flowing water, high oxygen concentrations and provide the larvae with stable food conditions.…”

Section: Introductionmentioning

confidence: 99%

Parallel habitat acclimatization is realized by the expression of different genes in two closely related salamander species (genus Salamandra)

et al. 2017

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The utilization of similar habitats by different species provides an ideal opportunity to identify genes underlying adaptation and acclimatization. Here, we analysed the gene expression of two closely related salamander species: Salamandra salamandra in Central Europe and Salamandra infraimmaculata in the Near East. These species inhabit similar habitat types: 'temporary ponds' and 'permanent streams' during larval development. We developed two species-specific gene expression microarrays, each targeting over 12 000 transcripts, including an overlapping subset of 8331 orthologues. Gene expression was examined for systematic differences between temporary ponds and permanent streams in larvae from both salamander species to establish gene sets and functions associated with these two habitat types. Only 20 orthologues were associated with a habitat in both species, but these orthologues did not show parallel expression patterns across species more than expected by chance. Functional annotation of a set of 106 genes with the highest effect size for a habitat suggested four putative gene function categories associated with a habitat in both species: cell proliferation, neural development, oxygen responses and muscle capacity. Among these high effect size genes was a single orthologue (14-3-3 protein zeta/YWHAZ) that was downregulated in temporary ponds in both species. The emergence of four gene function categories combined with a lack of parallel expression of orthologues (except 14-3-3 protein zeta) suggests that parallel habitat adaptation or acclimatization by larvae from S. salamandra and S. infraimmaculata to temporary ponds and permanent streams is mainly realized by different genes with a converging functionality.

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“…In S. infraimmaculata larvae, trophic function is linked by their timing of deposition. In temporary pools, while all the larvae compete for the limited prey resources, the first cohorts cannibalize later-arrived ones (Sadeh et al 2009;Sadeh et al 2011;Segev et al 2010). When there are no yet other larvae, S. infraimmaculata gravid females opt for deposition in structurally simple habitats, but if conspecific larvae already occur, they prefer more complex habitats; habitat complexity favour sheltering and larval survival in cannibalistic populations (Sadeh et al 2009).…”

Section: General Considerations On Cave Exploitations By the Fire Salmentioning

confidence: 99%

Cave exploitation by an usual epigean species: a review on the current knowledge on fire salamander breeding in cave

Manenti¹,

Lunghi²,

Ficetola³

2017

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Population size, structure and phenology of an endangered salamander at temporary and permanent breeding sites

Cited by 23 publications

References 51 publications

Genetic population structure of the endangered fire salamander (Salamandra infraimmaculata) at the southernmost extreme of its distribution

Genetic population structure of the endangered fire salamander (Salamandra infraimmaculata) at the southernmost extreme of its distribution

Parallel habitat acclimatization is realized by the expression of different genes in two closely related salamander species (genus Salamandra)

Cave exploitation by an usual epigean species: a review on the current knowledge on fire salamander breeding in cave

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