scholarly journals Direct long-distance dispersal best explains the bipolar distribution of Carex arctogena (Carex sect. Capituligerae , Cyperaceae)

2015 ◽  
Vol 42 (8) ◽  
pp. 1514-1525 ◽  
Author(s):  
Tamara Villaverde ◽  
Marcial Escudero ◽  
Santiago Martín-Bravo ◽  
Leo P. Bruederle ◽  
Modesto Luceño ◽  
...  
Keyword(s):  
Long Distance Dispersal ◽  
Long Distance ◽  
Bipolar Distribution

Umbilicaria subpolyphylla Oxner: the correct name for U. iberica Sancho & Krzewicka and its bipolar distribution pattern

2019 ◽  
Vol 51 (3) ◽  
pp. 205-220 ◽  
Author(s):  
Evgeny A. DAVYDOV ◽  
Oleg B. BLUM ◽  
Grigory P. KASHEVAROV ◽  
Vladimir P. GRAKHOV
Keyword(s):  
Secondary Metabolites ◽  
Distribution Pattern ◽  
Sympatric Speciation ◽  
Molecular Data ◽  
Long Distance Dispersal ◽  
Long Distance ◽  
Phenotypic Differences ◽  
Mediterranean Mountains ◽  
Bipolar Distribution

AbstractThe Umbilicaria polyphylla aggregate (U. polyphylla (L.) Baumg., U. subpolyphylla Oxner and U. iberica Sancho & Krzewicka) is discussed based on morphological, chemical and molecular data. Umbilicaria iberica is proposed to be a later synonym of U. subpolyphylla. The constructed nrITS + mtLSU phylogeny, which includes specimens with wide geographical ranges, shows that both U. polyphylla and U. subpolyphylla are monophyletic and closely related. Both species have the same type of thalloconidia and identical secondary metabolites. Umbilicaria subpolyphylla has prominent phenotypic differences when compared to U. polyphylla including the monophyllous thallus with a dull upper surface and an elevated, slightly wrinkled centre, often covered with white pruina, and a medulla of the ‘U. havaasii’ type. Phylogenetic evidence for the bipolar distribution of both U. polyphylla and U. subpolyphylla is provided. Sympatric speciation in one region followed by long-distance dispersal seems to be the most plausible phylogeographical explanation for the observed patterns. Umbilicaria subpolyphylla is found in southern temperate-subtropical (Mediterranean) mountains, at least in Europe.

scholarly journals Phylogenetic analysis of ITS sequences suggests a Pliocene origin for the bipolar distribution of Scleranthus (Caryophyllaceae)

2003 ◽  
Vol 16 (3) ◽  
pp. 301 ◽  
Author(s):  
R. D. Smissen ◽  
P. J. Garnock-Jones ◽  
G. K. Chambers
Keyword(s):  
Sequence Data ◽  
Its Sequence ◽  
Data Sets ◽  
Long Distance Dispersal ◽  
Lineage Sorting ◽  
Long Distance ◽  
The Family ◽  
Alternative Hypotheses ◽  
Bipolar Distribution ◽  
Recent Origin

Scleranthus is a genus of about 12 species of herbaceous plants or subshrubs native to Eurasia and Australasia. Here Scleranthus is shown to consist of European and Australasian clades, which diverged within the last 10 million years. Biogeographic implications of this dating and alternative hypotheses explaining the disjunct north–south distribution of the genus, are discussed. The trans-Tasman distributions of S. biflorus and S. brockiei are of recent origin and therefore consistent with long-distance dispersal rather than vicariance explanations. Morphological and ITS sequence data sets are significantly incongruent and trees derived from them differ over relationships among Australasian species. Hybridisation and introgression or lineage sorting are invoked to explain this discordance. Within the family Caryophyllaceae, Scleranthus ITS2 sequences have greater similarity to sequences from representatives of the subfamilies Alsinoideae and Caryophylloideae than to sequences from representatives of the subfamily Paronychioideae.

Comment on ‘Seagrass Viviparous Propagules as a Potential Long-Distance Dispersal Mechanism’ by A. C. G. Thomson et al.

2015 ◽  
Vol 39 (1) ◽  
pp. 290-293 ◽  
Author(s):  
Elizabeth A. Sinclair ◽  
Renae Hovey ◽  
John Statton ◽  
Matthew W. Fraser ◽  
Marion L. Cambridge ◽  
...  
Keyword(s):  
Long Distance Dispersal ◽  
Long Distance ◽  
Dispersal Mechanism
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