TY - JOUR
T1 - Amphitropic amphiantarctic disjunctions in Apiaceae subfamily Apioideae
AU - Spalik, Krzysztof
AU - Piwczyński, Marcin
AU - Danderson, Clark A.
AU - Kurzyna-Młynik, Renata
AU - Bone, Tiffany S.
AU - Downie, Stephen R.
PY - 2010/10
Y1 - 2010/10
N2 - Aim: Four genera of the plant family Apiaceae subfamily Apioideae - Apium, Chaerophyllum, Daucus and Lilaeopsis- are characterized by amphitropic and amphiantarctic distribution patterns, and in Australasia the subfamily is also represented by the tribe Aciphylleae. We infer the molecular ages of achieving amphitropic distribution for these lineages, reconstruct the biogeographical histories of Apium, Chaerophyllum, Daucus and Lilaeopsis, and identify the sister group of Aciphylleae. Location: Worldwide, with an emphasis on South America and Australasia. Methods: Divergence times were estimated employing a Bayesian approach (beast) with fossil pollen of basal apioids as calibration points and using a data set of nuclear ribosomal DNA internal transcribed spacer (nrDNA ITS) sequences from 284 accessions of Apioideae. Additionally, maximum-likelihood analyses were performed for data subsets comprising Apium, Daucus and Lilaeopsis. For Chaerophyllum, maximum-likelihood and beast analyses were carried out using combined chloroplast DNA and ITS data. Biogeographical scenarios were inferred using diva and lagrange. Results: The sister group to Aciphylleae is the Sino-Himalayan Acronema clade and the divergence between these two lineages is dated at 34.8 Ma, whereas the radiation of Aciphylleae started 11.0 Ma. A Northern Hemispheric origin was inferred for Apium, Chaerophyllum and Daucus, whereas Lilaeopsis probably originated in South America following a dispersal of its ancestor from North America. Chaerophyllum, Daucus and Lilaeopsis dispersed to the Southern Hemisphere at 5.3, 7.0 and 27.9 Ma, respectively. For Apium, two dispersals from Europe were inferred: to South America at 6.3 Ma, and to southern Africa at 3.9 Ma. The taxa migrated along the land masses of North and South America (Daucus, Lilaeopsis) and Africa (Apium) or by direct transoceanic dispersals through the Atlantic (Apium) or the Pacific (Chaerophyllum). Within the Southern Hemisphere they dispersed both westwards (Apium, Daucus, Lilaeopsis) and eastwards (Chaerophyllum, Lilaeopsis). For Chaerophyllum and Lilaeopsis, subsequent dispersal events to the Northern Hemisphere were also inferred. Main conclusions: Similar timing, contrasted with the diversity of migration routes, suggests that the dispersal events of these umbellifer taxa (and many other amphitropic amphiantarctic genera) were facilitated by favourable ecological conditions in the Southern Hemisphere (climatic cooling of the late Palaeogene/early Neogene) rather than by increased dispersal opportunities.
AB - Aim: Four genera of the plant family Apiaceae subfamily Apioideae - Apium, Chaerophyllum, Daucus and Lilaeopsis- are characterized by amphitropic and amphiantarctic distribution patterns, and in Australasia the subfamily is also represented by the tribe Aciphylleae. We infer the molecular ages of achieving amphitropic distribution for these lineages, reconstruct the biogeographical histories of Apium, Chaerophyllum, Daucus and Lilaeopsis, and identify the sister group of Aciphylleae. Location: Worldwide, with an emphasis on South America and Australasia. Methods: Divergence times were estimated employing a Bayesian approach (beast) with fossil pollen of basal apioids as calibration points and using a data set of nuclear ribosomal DNA internal transcribed spacer (nrDNA ITS) sequences from 284 accessions of Apioideae. Additionally, maximum-likelihood analyses were performed for data subsets comprising Apium, Daucus and Lilaeopsis. For Chaerophyllum, maximum-likelihood and beast analyses were carried out using combined chloroplast DNA and ITS data. Biogeographical scenarios were inferred using diva and lagrange. Results: The sister group to Aciphylleae is the Sino-Himalayan Acronema clade and the divergence between these two lineages is dated at 34.8 Ma, whereas the radiation of Aciphylleae started 11.0 Ma. A Northern Hemispheric origin was inferred for Apium, Chaerophyllum and Daucus, whereas Lilaeopsis probably originated in South America following a dispersal of its ancestor from North America. Chaerophyllum, Daucus and Lilaeopsis dispersed to the Southern Hemisphere at 5.3, 7.0 and 27.9 Ma, respectively. For Apium, two dispersals from Europe were inferred: to South America at 6.3 Ma, and to southern Africa at 3.9 Ma. The taxa migrated along the land masses of North and South America (Daucus, Lilaeopsis) and Africa (Apium) or by direct transoceanic dispersals through the Atlantic (Apium) or the Pacific (Chaerophyllum). Within the Southern Hemisphere they dispersed both westwards (Apium, Daucus, Lilaeopsis) and eastwards (Chaerophyllum, Lilaeopsis). For Chaerophyllum and Lilaeopsis, subsequent dispersal events to the Northern Hemisphere were also inferred. Main conclusions: Similar timing, contrasted with the diversity of migration routes, suggests that the dispersal events of these umbellifer taxa (and many other amphitropic amphiantarctic genera) were facilitated by favourable ecological conditions in the Southern Hemisphere (climatic cooling of the late Palaeogene/early Neogene) rather than by increased dispersal opportunities.
KW - Aciphylleae
KW - Amphitropic amphiantarctic disjunctions
KW - Apiaceae
KW - Apium
KW - Calibration
KW - Chaerophyllum
KW - Daucus
KW - Lilaeopsis
KW - Phylogeny
KW - RDNA ITS
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U2 - 10.1111/j.1365-2699.2010.02334.x
DO - 10.1111/j.1365-2699.2010.02334.x
M3 - Article
AN - SCOPUS:77957077442
SN - 0305-0270
VL - 37
SP - 1977
EP - 1994
JO - Journal of Biogeography
JF - Journal of Biogeography
IS - 10
ER -