Demographic population structure and fungal associations of plants colonizing High Arctic glacier forelands, Petuniabukta, Svalbard

Polar research

Jitka Klimešová²  Magdalena Lučanová³  Jakub Těšitel⁴  Tamara Těšitelová⁴  Alexandra Bernardová⁴  Edita Janková Drdová⁵ 

[1] Department of Functional EcologyInstitute of Botany, Academy of Sciences of the Czech Republic, Dukelská 145, CZ-379 82 Třeboň, Czech RepublicCorrespondence;Institute of BotanyAcademy of Sciences of the Czech Republic, Zámek 1, CZ-252 43 Průhonice, Czech Republic;Faculty of ScienceCharles University, Benátská 2, CZ-128 01 Praha 2, Czech Republic;Faculty of ScienceUniversity of South Bohemia, Branišovská 31, CZ-370 05 České Budějovice, Czech Republic;Institute of Experimental BotanyAcademy of Sciences of the Czech Republic, CZ-165 02 Praha 6, Czech Republic

关键词: Colonizer;    deglaciation;    endophyte;    High Arctic;    Olpidium;    succession;   

DOI  :  10.3402/polar.v33.20797

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

The development of vegetation in Arctic glacier forelands has been described as unidirectional, non-replacement succession characterized by the gradual establishment of species typical for mature tundra with no species turnover. Our study focused on two early colonizers of High Arctic glacier forelands: Saxifraga oppositifolia (Saxifragaceae) and Braya purpurascens (Brassicaceae). While the first species is a common generalist also found in mature old growth tundra communities, the second specializes on disturbed substrate. The demographic population structures of the two study species were investigated along four glacier forelands in Petuniabukta, north Billefjorden, in central Spitsbergen, Svalbard. Young plants of both species occurred exclusively on young substrate, implying that soil conditions are favourable for establishment only before soil crusts develop. We show that while S. oppositifolia persists from pioneer successional stages and is characterized by increased size and flowering, B. purpuras...

【 授权许可】

CC BY-NC