History of Larix decidua Mill. (European larch) since 130 ka

Wagner, S.; Litt, Thomas; Sánchez-Goñi, María-Fernanda; Petit, Rémy J.

doi:10.1016/j.quascirev.2015.07.002

Cited by 39 publications

(46 citation statements)

References 102 publications

(154 reference statements)

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“…The largely compatible and complementary datasets allowed the authors to draw convincing inferences regarding the historical rangewide biogeography of these tree species. Since then, many studies have integrated molecular and paleoecological approaches to unravel the continental-scale distributions of intraspecific lineages of many species since the Late Pleniglacial (e.g., Magri et al 2006, Gugger et al 2010, Parducci et al 2012, Wagner et al 2015. In this regard, the study by Magri et al (2006) The biogeographic model illustrates a range shift (interglacial-glacialinterglacial) and its consequences on the neutral genetic evolution of a given species during a complete glacial cycle (here Picea glauca, a widespread North American boreal tree, Anderson et al 2006.…”

Section: Understanding Population Dynamics In Response To Quaternary mentioning

confidence: 99%

Invoking adaptation to decipher the genetic legacy of past climate change

Lafontaine

Napier

Petit

et al. 2018

Ecology

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Persistence of natural populations during periods of climate change is likely to depend on migration (range shifts) or adaptation. These responses were traditionally considered discrete processes and conceptually divided into the realms of ecology and evolution. In a milestone paper, Davis and Shaw (2001) Science 292:673 argued that the interplay of adaptation and migration was central to biotic responses to Quaternary climate, but since then there has been no synthesis of efforts made to set up this research program. Here we review some of the salient findings from molecular genetic studies assessing ecological and evolutionary responses to Quaternary climate change. These studies have revolutionized our understanding of population processes associated with past species migration. However, knowledge remains limited about the role of natural selection for local adaptation of populations to Quaternary environmental fluctuations and associated range shifts, and for the footprints this might have left on extant populations. Next-generation sequencing technologies, high-resolution paleoclimate analyses, and advances in population genetic theory offer an unprecedented opportunity to test hypotheses about adaptation through time. Recent population genomics studies have greatly improved our understanding of the role of contemporary adaptation to local environments in shaping spatial patterns of genetic diversity across modern-day landscapes. Advances in this burgeoning field provide important conceptual and methodological bases to decipher the historical role of natural selection and assess adaptation to past environmental variation. We suggest that a process called "temporal conditional neutrality" has taken place: some alleles favored in glacial environments become selectively neutral in modern-day conditions, whereas some alleles that had been neutral during glacial periods become under selection in modern environments. Building on this view, we present a new integrative framework for addressing the interplay of demographic and adaptive evolutionary responses to Quaternary climate dynamics, the research agenda initially envisioned by Davis and Shaw (2001) Science 292:673.

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Section: Understanding Population Dynamics In Response To Quaternary mentioning

confidence: 99%

Invoking adaptation to decipher the genetic legacy of past climate change

Lafontaine

Napier

Petit

et al. 2018

Ecology

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“…Species range shifts at their northern or upper limits are becoming increasingly prevalent, with latitudinal and elevational range shifts being especially well‐documented across the northern circumboreal (Dufour‐Tremblay, Lévesque, & Boudreau, ; Kharuk et al., ; Mamet & Kershaw, ; Trant & Hermanutz, ), though with colonization lags in some areas (Payette, ; Svenning & Sandel, ). Climate has largely shaped the current configuration of the boreal forest as a mosaic of relict and refuge populations near the boreal range limits since the end of the last glaciation (D'Orangeville et al., ; Wagner, Litt, Sánchez‐Goñi, & Petit, ). Recently, however, range limits have become increasingly modulated by anthropogenic land use and changing disturbance regimes (Girardin et al., ; Hofgaard, ).…”

Section: Introductionmentioning

confidence: 99%

Shifting global Larix distributions: Northern expansion and southern retraction as species respond to changing climate

Mamet

Brown

Trant

et al. 2018

Journal of Biogeography

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Aim Recent and rapid warming is reorganizing terrestrial vegetation, creating novel species assemblages, and shifting range limits. Relative to the evergreen species that currently dominate much of the boreal forest landscape, Larix (larch) distributions may be particularly responsive to climatic change due to their deciduous habit, and quick growth and reproduction. Here, we amassed data from 83 studies to describe and explain observed patterns of Larix range shifts under contemporary climate change. Location Northern hemisphere. Taxon Species of the genus Larix, deciduous gymnosperms. Methods With 181 observations of Larix range limit dynamics, we used five distribution parameters (tree line advance, stand infilling, tree line recession, stand thinning, no response) and their determinants (climate, land use change, natural disturbance) to describe and explain observed patterns of Larix range shifts under contemporary climate change. We ran a redundancy analysis on the matrix of five distribution parameters considered with other climatic and nonclimatic parameters as explanatory variables. We also characterized the climatic niche of Larix species (temperature and precipitation) and how the niche has changed during the 20th century. Results Of 173 sites studied over the full distribution of Larix, 63% experienced Larix population increases, 18% had population decreases, and no response was detected at 19% of sites. Latitudinal Larix tree lines in Siberia and North America appear to be infilling and shifting their distributions northward, whereas Larix recession and thinning was more common in southern regions, suggesting southern populations may be experiencing greater drought stress than their northern counterparts. Climatic niches of most Larix species shifted towards warmer and wetter conditions, with tree line advance/forest infilling in cool/dry climate space, and recession/thinning in warm/dry space. Main conclusions Northern expansion is underway or seems imminent for boreal Larix species, primarily L. laricina in North America. Retraction in southern regions and disappearance of some mountainous populations may be inevitable due to their narrow ecological niches. Species restricted to mountainous habitats may expand locally, though will likely not contribute to broad scale range expansion. These changes will depend on suitable climate, disturbance, and dispersal mechanisms.

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“…14 700–12 850 cal yr bp ). An early‐Holocene age would fit with evidence attesting that the spread of L. decidua in the western sector of the Alps occurred later than in the eastern sector (Wagner et al ., ). By contrast, a Bølling‐Allerød age would be truly a novel palaeoecological finding showing the establishment of modern treeline before the Holocene.…”

Section: Comment On Carcaillet and Blarquez () ‘Fire Ecology Of A Tree mentioning

confidence: 97%

Fire on ice and frozen trees? Inappropriate radiocarbon dating leads to unrealistic reconstructions

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Fire on ice and frozen trees? Inappropriate radiocarbon dating leads to unrealistic reconstructions Comment on Carcaillet & Blarquez (2017) 'Fire ecology of a tree glacial refugium on a nunatak with a view on Alpine glaciers'.The questions as to where and how trees survived the Quaternary ice ages are key for understanding climate-driven range expansion processes (Clark, 1998;Giesecke et al., 2017) and the influence of ice-age legacies on current mid-and high-latitude biodiversity patterns (Willis & Whittaker, 2000). Such questions have long intrigued plant ecologists, biogeographers and palaeoecologists (Bennett et al., 1991;Kaltenrieder et al., 2009) and have recently become the focus of combined molecular-ecological and biogeographical studies (Magri et al., 2006;Wagner et al., 2015).The classic southern-refugia paradigm (van der Hammen et al., 1971;Tzedakis et al., 2013) postulates treeless landscapes in central Europe and at the margins of the continental and Alpine ice-sheets for the time of the Last Glacial Maximum (LGM; c. 23 000-19 000 calendar years before present (cal yr BP, where 0 cal yr BP = AD 1950), that is, the interval representing the most extreme conditions of the Last Glacial). Widespread cold-adapted alpine and arctic plants and boreal dwarf shrubs are documented to have occurred north of the Alps (Birks & Willis, 2008;Tzedakis et al., 2013), while small populations of temperate and boreal trees persisted in southern European peninsulas (Iberia, Italy, and the Balkans) (Bennett et al., 1991). Boreal and mountain conifers (e.g. Larix decidua Mill. and Pinus cembra L.) occurred at more northerly locations (up to c. 46°N) in eastern Europe, and grew closer to the southern margin of the Alpine and Carpathian ice-caps than temperate trees Vescovi et al., 2007;Kune s et al., 2008). This view has been challenged by the alternative interpretation that temperate plant species could have survived the LGM further north in locally favourable conditions as small populations that may be hard to detect with palaeoecological tools (e.g. Stewart & Lister, 2001;Heikkil€ a et al., 2009;V€ aliranta et al., 2011). Recently, Carcaillet & Blarquez (2017 presented evidence for the occurrence of an LGM 'tree refugium' located at c. 2200 m above sea level (asl) on a nunatak (a mountain top or peak emerging from or at the edge of an ice sheet or glacier) on the western flank of the European Alps. The reported presence of L. decidua and P. cembra plant macrofossils during the LGM in sediments from Lake Miroir, a site located close to modern treeline altitude (TLA), challenges the consensus on the LGM distributions of trees in

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History of Larix decidua Mill. (European larch) since 130 ka

Cited by 39 publications

References 102 publications

Invoking adaptation to decipher the genetic legacy of past climate change

Invoking adaptation to decipher the genetic legacy of past climate change

Shifting global Larix distributions: Northern expansion and southern retraction as species respond to changing climate

Fire on ice and frozen trees? Inappropriate radiocarbon dating leads to unrealistic reconstructions

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