scholarly journals Middle-Upper Pleistocene climate changes shaped the divergence and demography of Cycas guizhouensis (Cycadaceae): Evidence from DNA sequences and microsatellite markers

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Xiuyan Feng ◽  
Ying Zheng ◽  
Xun Gong
Keyword(s):  
Microsatellite Markers ◽  
Dna Sequences ◽  
Climate Changes ◽  
Upper Pleistocene ◽  
Pleistocene Climate

scholarly journals A rapid loss of stripes: the evolutionary history of the extinct quagga

2005 ◽  
Vol 1 (3) ◽  
pp. 291-295 ◽  
Author(s):  
Jennifer A Leonard ◽  
Nadin Rohland ◽  
Scott Glaberman ◽  
Robert C Fleischer ◽  
Adalgisa Caccone ◽  
...  
Keyword(s):  
South African ◽  
Dna Sequences ◽  
Evolutionary History ◽  
Climate Changes ◽  
Rapid Loss ◽  
Mt Dna ◽  
Pleistocene Climate ◽  
Equus Burchelli ◽  
History Of ◽  
Plains Zebra

Twenty years ago, the field of ancient DNA was launched with the publication of two short mitochondrial (mt) DNA sequences from a single quagga ( Equus quagga ) museum skin, an extinct South African equid ( Higuchi et al . 1984 Nature 312 , 282–284). This was the first extinct species from which genetic information was retrieved. The DNA sequences of the quagga showed that it was more closely related to zebras than to horses. However, quagga evolutionary history is far from clear. We have isolated DNA from eight quaggas and a plains zebra (subspecies or phenotype Equus burchelli burchelli ). We show that the quagga displayed little genetic diversity and very recently diverged from the plains zebra, probably during the penultimate glacial maximum. This emphasizes the importance of Pleistocene climate changes for phylogeographic patterns in African as well as Holarctic fauna.

Early Pleistocene climate changes in the central Mediterranean region as inferred from integrated pollen and planktonic foraminiferal stable isotope analyses

2007 ◽  
Vol 67 (2) ◽  
pp. 264-274 ◽  
Author(s):  
Sébastien Joannin ◽  
Frédéric Quillévéré ◽  
Jean-Pierre Suc ◽  
Christophe Lécuyer ◽  
François Martineau
Keyword(s):  
Mediterranean Region ◽  
Climate Changes ◽  
Environmental Changes ◽  
Early Pleistocene ◽  
Subtropical Climate ◽  
Central Mediterranean ◽  
Globigerina Bulloides ◽  
Riparian Trees ◽  
Pleistocene Climate ◽  
Anoxic Events

AbstractVegetation inherited from a Pliocene subtropical climate evolved through obliquity oscillations and global cooling leading to modern conditions. An integrated, highly time-resolved record of pollen and stable isotopes (δ18O and δ13C of Globigerina bulloides) was obtained to understand vegetation responses to Early Pleistocene climate changes. Continental and marine responses are compared in the Central Mediterranean region with a particular consideration of environmental changes during anoxic events.Pollen data illustrate vegetation dynamics as follows: [1] development of mesothermic elements (warm and humid conditions); [2] expansion of mid- and high-altitude elements (cooler but still humid conditions); and [3] strengthening of steppe and herb elements (cooler and dry conditions). These successions correlate with precession. δ18O variations recorded by Globigerina bulloides define two cycles (MIS 43-40) related to obliquity. At northern low- to mid-latitudes, the pollen signal records temperature and wetness changes related to precession even during global climate changes induced by obliquity. This may result in unexpected increasing wetness during glacial periods, which has to be considered specific to the Central and Eastern Mediterranean region. Lastly, an analysis of anoxic events reveals that enhanced runoff is indicated by increasing frequency of the riparian trees Liquidambar and Zelkova.

New insights in the taxonomy of Mediterranean Diodora (Mollusca, Gastropoda, Fissurellidae)

2016 ◽  
Vol 97 (7) ◽  
pp. 1527-1536 ◽  
Author(s):  
Chrifa Aissaoui ◽  
Nicolas Puillandre ◽  
Philippe Bouchet
Keyword(s):  
Current Distribution ◽  
Climate Changes ◽  
Aegean Sea ◽  
Valid Species ◽  
Gulf Of Gabes ◽  
Mediterranean Populations ◽  
Gulf Of Gabès ◽  
Pleistocene Climate ◽  
Glacial Refuges

The taxonomy of Mediterranean populations of Diodora is assessed based on new molecular (COI and 28S) data. The recently described Diodora demartiniorum Buzzurro & Russo, 2005, is found to be a valid species restricted to the Gulf of Gabès (Tunisia) but possibly occurring also on the coast of Libya. However, specimens from the Aegean Sea previously identified as D. demartiniorum are molecularly (and morphologically pseudocryptically) distinct and represent a previously unrecognized species here described as D. giannispadai n. sp. It is hypothesized that the current distribution of these two species corresponds to glacial refuges during Pleistocene climate changes.

scholarly journals Pleistocene climate changes, and not agricultural spread, accounts for range expansion and admixture in the dominant grassland speciesLolium perenneL.

2019 ◽  
Author(s):  
José Luis Blanco‐Pastor ◽  
Stéphanie Manel ◽  
Philippe Barre ◽  
Anna M. Roschanski ◽  
Evelin Willner ◽  
...  
Keyword(s):  
Range Expansion ◽  
Climate Changes ◽  
Pleistocene Climate
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