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Ultramafic vegetation and soils in the circumboreal region of the Northern Hemisphere

机译：北半球外接区的超镁铁质植被和土壤

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摘要

The paper summarizes literature on climate, soil chemistry, vegetation and metal accumulation by plants found on ultramafic substrata in the circumboreal zone (sensu Takhtajan, Floristic regions of the world, 1986) of the Northern Hemisphere. We present a list of 50 endemic species and 18 ecotypes obligate to ultramafic soils from the circumboreal region of Holarctic, as well as 30 and 2 species of Ni and Zn hyperaccumulators, respectively. The number of both endemics and hyperaccumulators are markedly lower compared to that of the Mediterranean and tropical regions. The diversity of plant communities on ultramafics soils of the circumboral region is also described. The underlying causes for the differences of ultramafic flora between arctic, cold, cool temperate and Mediterranean and tropical regions are also discussed.
机译：这篇论文总结了北半球外接带（sensu Takhtajan，世界植物区，1986）上超镁铁质基质上发现的植物的气候，土壤化学，植被和金属积累的文献。我们列出了50种特有物种和18种生态型，它们分别来自Holarctic外接区的超镁铁质土壤，以及分别有30种和2种Ni和Zn超积累物质。与地中海和热带地区相比，地方病和过度蓄积者的数量明显减少。还描述了周缘地区超镁铁质土壤上植物群落的多样性。还讨论了北极，寒带，凉带，地中海和热带地区超镁铁质菌群差异的根本原因。

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