Range contraction and loss of genetic variation of the Pyrenean endemic newt Calotriton asper due to climate change

Pous, Philip de; Montori, Albert; Amat, Fèlix; Sanuy, Delfí

doi:10.1007/s10113-015-0804-3

Cited by 15 publications

(8 citation statements)

References 99 publications

(139 reference statements)

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“…The complete loss of an evolutionary lineage can compromise species evolutionary potential and, eventually, its persistence (due to genetic depletion and reduced adaptive potential), even for lineages comprising low nucleotide diversity. Therefore, analyzing the impacts of climate change at the species level only, can lead to misleading conclusions about the degree of exposure at the intraspecific level (Balint et al, ; de Pous, Montori, Amat, & Sanuy, ). This finding is particularly relevant for species containing lineages which may drastically contract their range in the future, which was the case of A. cisternasii , L. boscai , and P. carbonelli .…”

Section: Discussionmentioning

confidence: 99%

Genes on the edge: A framework to detect genetic diversity imperiled by climate change

Carvalho

Torres

Tarroso

et al. 2019

Global Change Biology

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Ongoing global warming is disrupting several ecological and evolutionary processes, spanning different levels of biological organization. Species are expected to shift their ranges as a response to climate change, with relevant implications to peripheral populations at the trailing and leading edges. Several studies have analyzed the exposure of species to climate change but few have explored exposure at the intraspecific level. We introduce a framework to forecast exposure to climate change at the intraspecific level. We build on existing methods by combining correlative species distribution models, a model of species range dynamics, and a model of phylogeographic interpolation. We demonstrate the framework by applying it to 20 Iberian amphibian and reptile species. Our aims were to: (a) identify which species and intraspecific lineages will be most exposed to future climate change; (b) test if nucleotide diversity at the edges of species ranges are significantly higher or lower than on the overall range; and (c) analyze if areas of higher species gain, loss, and turnover coincide with those predicted for lineages richness and nucleotide diversity. We found that about 80% of the studied species are predicted to contract their range. Within each species, some lineages were predicted to contract their range, while others were predicted to maintain or expand it. Therefore, estimating the impacts of climate change at the species level only can underestimate losses at the intraspecific level. Some species had significant high amount of nucleotide at the trailing or leading edge, or both, but we did not find a consistent pattern across species. Spatial patterns of species richness, gain, loss, and turnover were fairly concurrent with lineages richness and nucleotide diversity. Our results support the need for increased attention to intraspecific diversity regarding monitoring and conservation strategies under climate change.

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Section: Discussionmentioning

confidence: 99%

Genes on the edge: A framework to detect genetic diversity imperiled by climate change

Carvalho

Torres

Tarroso

et al. 2019

Global Change Biology

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“…asper shown in our study, the most vulnerable areas are those at the limit of its distribution, such as the eastern Pyrenees and/or the lowlands, basically due to the less suitable environmental conditions. Taking into account this scenario, future predictions of climate change may drastically reduce the potential distribution range of this species [ 85 ]. The mountain critical zone at mid-altitudes may see important climatic changes over time and are already under high anthropogenic pressure due to pastorialism and tourism.…”

Section: Discussionmentioning

confidence: 99%

Jailed in the mountains: Genetic diversity and structure of an endemic newt species across the Pyrenees

et al. 2018

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The Pyrenees represent a natural laboratory for biogeographic, evolutionary and ecological research of mountain fauna as a result of the high variety of habitats and the profound effect of the glacial and interglacial periods. There is a paucity of studies providing a detailed insight into genetic processes and better knowledge on the patterns of genetic diversity and how they are maintained under high altitude conditions. This is of particular interest when considering the course of past climate conditions and glaciations in a species which is considered site tenacious, with long generation times. Here we analyzed the genetic patterns of diversity and structure of the endemic Pyrenean brook newt (Calotriton asper) along its distribution range, with special emphasis on the distinct habitat types (caves, streams, and lakes), and the altitudinal and geographical ranges, using a total set of 900 individuals from 44 different localities across the Pyrenean mountain range genotyped for 19 microsatellite loci. We found evidence for a negative longitudinal and positive altitudinal gradient of genetic diversity in C. asper populations. The fact that genetic diversity was markedly higher westwards is in accordance with other Pyrenean species. However, the impact of altitudinal gradient on the genetic diversity seems to differ from other species, and mostly from other amphibians. We found that lower altitudes can act as a barrier probably because the lowlands do not provide a suitable habitat for C. asper. Regarding the distinct habitat types, caves had significantly lower values of genetic diversity compared to streams or lakes. The mean FST value was relatively high (0.304) with maximum values as high as 0.771, suggesting a highly structured total population. Indeed, populations were grouped into five subclusters, the eastern populations (cluster 1) remained grouped into two subclusters and the central-western Pyrenees (cluster 2) into three subclusters. The increase of isolation with geographical distance is consistent with the population structure detected. In conclusion, C. asper seems to be adapted to high altitude mountain habitats, and its genetic diversity is higher in the western Pyrenees. In terms of conservation priority, we consider more relevant the populations that represent a reservoir of genetic diversity.

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“…Changes in gene expression (e.g., due to epigenetic processes) 11.2. Heterozygosity Bradshaw and Holzapfel (2001), Henry (2011), Geerts et al (2015), Pacifici et al (2015), de Pous, Montori, Amat, & Sanuy (2016 Further examples are documented in Bellard, Bertelsmeier, Leadley, Thuiller, and Courchamp (2012) and Scheffers et al (2016). Here we define populations as the total number of individuals of the species and subpopulations as geographically or otherwise distinct groups within the population (IUCN SSC Standards and Petitions Subcommittee, 2017).…”

Section: Potential Impacts and Their Mechanismsmentioning

confidence: 99%

Climate change vulnerability assessment of species

Foden

Young

Akçakaya

et al. 2018

WIREs Climate Change

341

367

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Assessing species' vulnerability to climate change is a prerequisite for developing effective strategies to conserve them. The last three decades have seen exponential growth in the number of studies evaluating how, how much, why, when, and where species will be impacted by climate change. We provide an overview of the rapidly developing field of climate change vulnerability assessment (CCVA) and describe key concepts, terms, steps and considerations. We stress the importance of identifying the full range of pressures, impacts and their associated mechanisms that species face and using this as a basis for selecting the appropriate assessment approaches for quantifying vulnerability. We outline four CCVA assessment approaches, namely trait-based, correlative, mechanistic and combined approaches and discuss their use. Since any assessment can deliver unreliable or even misleading results when incorrect data and parameters are applied, we discuss finding, selecting, and applying input data and provide examples of open-access resources. Because rare, small-range, and declining-range species are often of particular conservation concern while also posing significant challenges for CCVA, we describe alternative ways to assess them. We also describe how CCVAs can be used to inform IUCN Red List assessments of extinction risk. Finally, we suggest future directions in this field and propose areas where research efforts may be particularly valuable.

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Range contraction and loss of genetic variation of the Pyrenean endemic newt Calotriton asper due to climate change

Cited by 15 publications

References 99 publications

Genes on the edge: A framework to detect genetic diversity imperiled by climate change

Genes on the edge: A framework to detect genetic diversity imperiled by climate change

Jailed in the mountains: Genetic diversity and structure of an endemic newt species across the Pyrenees

Climate change vulnerability assessment of species

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