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

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العنوان: Demographic population structure and fungal associations of plants colonizing High Arctic glacier forelands, Petuniabukta, Svalbard
المؤلفون: Jakub Těšitel, Tamara Těšitelová, Alexandra Bernardová, Edita Janková Drdová, Magdalena Lučanová, Jitka Klimešová
المصدر: Polar Research, Vol 33, Iss 0, Pp 1-11 (2014)
بيانات النشر: Norwegian Polar Institute, 2014.
سنة النشر: 2014
المجموعة: LCC:Environmental sciences
LCC:Oceanography
مصطلحات موضوعية: Colonizer, deglaciation, endophyte, High Arctic, Olpidium, succession, Environmental sciences, GE1-350, Oceanography, GC1-1581
الوصف: 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. purpurascens specializes on disturbed young substrate and does not follow the typical unidirectional, non-replacement succession pattern. Plants at two of the forelands were examined for the presence of root-associated fungi. Fungal genus Olpidium (Fungus incertae sedis) was found along a whole successional gradient in one of the forelands.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1751-8369
Relation: http://www.polarresearch.net/index.php/polar/article/download/20797/pdf_1; https://doaj.org/toc/1751-8369
DOI: 10.3402/polar.v33.20797
URL الوصول: https://doaj.org/article/2096fd4b728f44d89a9e7fe04d1028f5
رقم الأكسشن: edsdoj.2096fd4b728f44d89a9e7fe04d1028f5
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:17518369
DOI:10.3402/polar.v33.20797