Are Deschampsia antarctica Desv. and Colobanthus quitensis (Kunth) Bartl. Migratory relicts?

被引：0
作者：
I. Yu. Parnikoza
D. N. Maidanuk
I. A. Kozeretska
机构：
[1] Taras Shevchenko Kiev National University,
[2] Institute of Molecular Biology and Genetics of the National Academy of Sciences of Ukraine,undefined
来源：
Cytology and Genetics | 2007年 / 41卷
关键词：
Internal Transcribe Space; Antarctic Peninsula; Antarctic Circumpolar Current; Drake Passage; South Shetland Island;
D O I：
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摘要：
It remains unclear why there are only two vascular plant species in Antarctica, Deschampsia antarctica Desv. (Poaceae) and Colobanthus quitensis (Kunth) Bartl. (Caryophyllaceae). Despite progressing climate warming, there is also just one alien plant species found in the region, introduced by humans and spreading mainly in disturbed habitats. In the present article, we try to interpret the data concerning the history of the biota and glaciations of the continent, proceeding from the assumption that both plants migrated to Antarctica during the Oligocene-Pliocene, when it was less isolated and the climate was more favorable for their naturalization. Genetic evidence was also taken into consideration. Our data allow the suggestion of secondary dispersal in the region, due to transference by birds with regard to climate changes. With this in mind, we believe that D. antarctica and C. quitensis are migratory relicts.
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页码：226 / 229
页数：3
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