Integrating phylogenomics, phylogenetics, morphometrics, relative genome size and ecological niche modelling disentangles the diversification of Eurasian Euphorbia seguieriana s. l. (Euphorbiaceae)

Frajman, Božo; Záveská, Eliška; Gamisch, Alexander; Schönswetter, Peter; Schönswetter, Peter

doi:10.1016/j.ympev.2018.10.046

Cited by 36 publications

(36 citation statements)

References 57 publications

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“…2c, Supplementary Fig. 3), which is in line with Pleistocene diversification within E. seguieriana 18 and emphasises the role of glacial cycles in shaping the genetic legacy of Europe's extrazonal steppes. In contrast to Europe's temperate forest taxa, for which the onset of the Pleistocene glaciations initiated a period of elevated extinction rate 24,25 and led to a decrease of genetic diversity north of the Alps 25,26 , cold-tolerant steppe species were more widely distributed and abundant during Pleistocene cold stages and retreated during warm interglacials and in the Holocene 27,28 .…”

Section: Discussionsupporting

confidence: 77%

“…Three general patterns emerged. In one species (E. seguieriana), extrazonal lineages were clearly nested in and thus derived from zonal lineages (pattern i) 18 . For all other species, extrazonal lineages were either (ii) restricted to parts of the European Alps and the Italian Peninsula (S. capillata, S. nigromaculatus) or iii) inhabited the Alps and western and southern Europe and met zonal lineages in or at the periphery of the Pannonian basin (A. onobrychis, O. petraeus, P. taurica).…”

Section: Resultsmentioning

confidence: 99%

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Long-term isolation of European steppe outposts boosts the biome’s conservation value

et al. 2020

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The European steppes and their biota have been hypothesized to be either young remnants of the Pleistocene steppe belt or, alternatively, to represent relicts of long-term persisting populations; both scenarios directly bear on nature conservation priorities. Here, we evaluate the conservation value of threatened disjunct steppic grassland habitats in Europe in the context of the Eurasian steppe biome. We use genomic data and ecological niche modelling to assess pre-defined, biome-specific criteria for three plant and three arthropod species. We show that the evolutionary history of Eurasian steppe biota is strikingly congruent across species. The biota of European steppe outposts were long-term isolated from the Asian steppes, and European steppes emerged as disproportionally conservation relevant, harbouring regionally endemic genetic lineages, large genetic diversity, and a mosaic of stable refugia. We emphasize that conserving what is left of Europe's steppes is crucial for conserving the biological diversity of the entire Eurasian steppe biome.

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Section: Discussionsupporting

confidence: 77%

Section: Resultsmentioning

confidence: 99%

Long-term isolation of European steppe outposts boosts the biome’s conservation value

et al. 2020

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“…Plio‐Pleistocene) climate oscillations is of great utility for understanding the evolution of organisms and their future response to anthropogenic climate change (Bálint et al, ; Comes & Kadereit, ; Espíndola et al, ; Haywood et al, ; Hewitt, ; Lawing & Polly, ; Myers, Stigall, & Lieberman, ). Spatially explicit palaeo‐climatic data have provided important insights into macroecology (Bálint et al, ; Couvreur et al, ; Kissling, Blach‐Overgaard, Zwaan, & Wagner, ; Rakotoarinivo et al, ), macroevolution (Meseguer et al, ), palaeobiology (Myers et al, ), systematics (Frajman et al, ; Younger et al, ), biogeography (Benítez‐Benítez, Escudero, Rodríguez‐Sánchez, Martín‐Bravo, & Jiménez‐Mejías, ; Espíndola et al, ; Silva, Antonelli, Lendel, Moraes, & Manfrin, ; Wang et al, ), palaeophylogeography (Lawing & Polly, ; Lawing, Polly, Hews, & Martins, ; Rödder et al, ) and conservation (Alsos, Alm, Normand, & Brochmann, ). However, such palaeo‐climatic data are currently restricted to a few time periods (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…explicit palaeo-climatic data have provided important insights into macroecology (Bálint et al, 2018;Couvreur et al, 2015;Kissling, Blach-Overgaard, Zwaan, & Wagner, 2016;Rakotoarinivo et al, 2013), macroevolution (Meseguer et al, 2018), palaeobiology (Myers et al, 2015), systematics (Frajman et al, 2019;Younger et al, 2018), biogeography (Benítez-Benítez, Escudero, Rodríguez-Sánchez, Martín-Bravo, & Jiménez-Mejías, 2018;Espíndola et al, 2012;Silva, Antonelli, Lendel, Moraes, & Manfrin, 2018;Wang et al, 2015), palaeophylogeography (Lawing & Polly, 2011;Lawing, Polly, Hews, & Martins, 2016;Rödder et al, 2013) and conservation (Alsos, Alm, Normand, & Brochmann, 2009). However, such palaeo-climatic data are currently restricted to a few time periods (e.g.…”

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confidence: 99%

Oscillayers: A dataset for the study of climatic oscillations over Plio‐Pleistocene time‐scales at high spatial‐temporal resolution

Gamisch

2019

Global Ecol Biogeogr

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MotivationIn order to understand how species evolutionarily responded to Plio‐Pleistocene climate oscillations (e.g. in terms of speciation, extinction, migration and adaptation), it is first important to have a good understanding of those past climate changes per se. This, however, is currently limited due to the lack of global‐scale climatic datasets with high temporal resolution spanning the Plio‐Pleistocene. To fill this gap, I here present Oscillayers, a global‐scale and region‐specific bioclim dataset, facilitating the study of climatic oscillations during the last 5.4 million years at high spatial (2.5 arc‐minutes) and temporal (10 kyr time periods) resolution. This dataset builds upon interpolated anomalies (Δ layers) between bioclim layers of the present and the Last Glacial Maximum (LGM) that are scaled relative to the Plio‐Pleistocene global mean temperature curve, derived from benthic stable oxygen isotope ratios, to generate bioclim variables for 539 time periods. Evaluation of the scaled, interpolated estimates of palaeo‐climates generated for the Holocene, Last Interglacial and Pliocene showed good agreement with independent general circulation models (GCMs) for respective time periods in terms of pattern correlation and absolute differences. Oscillayers thus provides a new tool for studying spatial‐temporal patterns of evolutionary and ecological processes at high temporal and spatial resolution.Main types of variable containedNineteen bioclim variables for time periods throughout the Plio‐Pleistocene. Input data and R script to recreate all 19 bioclim variables.Spatial location and grainGlobal at 2.5 arc‐minutes (4.65 x 4.65 = 21.62 km2 at the equator).Time period and grainThe last 5.4 million years. The grain is 10 kyr (= 539 time periods).Level of measurementData are for terrestrial climates (excluding Antarctica) taking sea level changes into account.Software formatAll data are available as ASCII grid files.

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“…More recently, the rapid consolidation of high throughput sequencing (HTS) techniques coupled with novel analytical tools is providing massive amounts of sequence data, which can potentially resolve recalcitrant regions of the tree of life (but see Olmstead & Bedoya, 2019). Phylogenomics (i.e., phylogenetics using genome‐scale datasets) can also contribute to clarify long‐standing taxonomic controversies, and even more in the context of an integrative taxonomic approach (e.g., Prata et al, 2018; Frajman et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

More than one sweet tabaiba: Disentangling the systematics of the succulent dendroid shrub Euphorbia balsamifera

Riina

Villaverde

Rincón-Barrado

et al. 2020

J of Sytematics Evolution

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The sweet tabaiba (Euphorbia balsamifera Ait.) is one of the classical examples of the disjunct biogeographic pattern known as Rand Flora. This species is currently circumscribed to comprise two subspecies, Euphorbia balsamifera subsp. balsamifera and E. balsamifera subsp. adenensis (Deflers) P.R.O. Bally, with their respective areas of distribution separated by a gap of about 2000 km across Central‐East Africa. We use multiple sources of evidence including phylogenomics, morphometrics, lineage ages, and climatic niche analysis to disentangle the confusing taxonomy around this charismatic Euphorbia lineage. Based on our integrative approach, we reestablish the two current subspecies to the rank of species (E. balsamifera Ait., E. adenensis Deflers) and resurrect the long forgotten E. sepium N.E. Br., a commonly used species in the western Sub‐Saharan and Sahelian regions. The taxonomic treatment presented here includes an identification key, updated morphological descriptions, and lectotypification of several names.

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Integrating phylogenomics, phylogenetics, morphometrics, relative genome size and ecological niche modelling disentangles the diversification of Eurasian Euphorbia seguieriana s. l. (Euphorbiaceae)

Cited by 36 publications

References 57 publications

Long-term isolation of European steppe outposts boosts the biome’s conservation value

Long-term isolation of European steppe outposts boosts the biome’s conservation value

Oscillayers: A dataset for the study of climatic oscillations over Plio‐Pleistocene time‐scales at high spatial‐temporal resolution

More than one sweet tabaiba: Disentangling the systematics of the succulent dendroid shrub Euphorbia balsamifera

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