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Fungi in liverwort-based biocrust

Fungi in liverwort-based biocrust


Title: Fungi in liverwort-based biocrust
Alternative Title: Sveppir í hélumosalífskurn
Author: Guðmundsdóttir, Petra Landmark
Andrésson, Ólafur   orcid.org/0000-0002-8451-5671
Date: 2019
Language: English
Scope: 43-60
University/Institute: Háskóli Íslands
University of Iceland
School: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (HÍ)
Department: Líf- og umhverfisvísindadeild (HÍ)
Faculty of Life and Environmental Sciences (HÍ)
Series: Icelandic Agricultural Sciences;32(2019)
ISSN: 2298-786X
DOI: 10.16886/IAS.2019.05
Subject: Fungi; Biocrust; Soils; Sveppir; Jarðvegur
URI: https://hdl.handle.net/20.500.11815/1343

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Citation:

Gudmundsdottir, P. L., & Andresson, O. S. (2019) Fungi in liverwort-based biocrust. Icelandic Agricultural Sciences 32(2019) pp. 43-60

Abstract:

 
Fungal distribution in a liverwort-based biocrust was examined at different depths (0, 5 and 20 mm) by direct counting using both light and fluorescence microscopy. The DNA-based taxonomic composition of fungi was also determined and differences between depths (above and below 5 mm) were assessed. The fungal biomass was greatest at the surface where large hyphae, sporangia and fungi within plants were more abundant than at 5 mm and 20 mm depth. The texture of the biocrust also differed significantly with depth. Likewise, the analysis of microbial DNA composition revealed a difference between depths, both for the amount of total fungi and of each phylum where the total amount of fungi was highest above 5 mm. Ascomycota fungi were dominant both below 5 mm and near the surface where both their amount and proportion were substantially higher than deeper down. The dark septate Exophiala, Phialocephala and Pseudogymnoascus were the most abundant genera.
 
Sveppir í íslenskri hélumosalífskurn voru skoðaðir í ljóssmásjá og í flúrsmásjá. Munur á dreifingu sveppa var metinn eftir dýpi (0, 5, 20 mm) og flokkunarfræðileg samsetning hópa í lífskurninni var skoðuð ofan við 5 mm og neðan við 5 mm. Munur var á áferð lífskurnar og útbreiðslu sveppa eftir dýpi. Lífmassi sveppa var meiri við yfirborð þar sem breiðir sveppþræðir, gróhirslur og sveppir á og í plöntum voru í meira magni en á 5 mm og 20 mm dýpi. Samsetningin var jafnframt mismunandi eftir dýpi hvað varðar heildarmagn sveppa og magn einstakra fylkinga. Heildarmagn sveppa var meira í sýnum ofan við 5 mm en neðar. Asksveppir voru ríkjandi í öllum sýnum, bæði ofan við 5 mm og neðan við 5 mm en þeir voru í töluvert meira magni og hærra hlutfalli ofan við 5 mm en neðan. Dökkir sveppir af ættkvíslunum Exophiala, Pialocephala og Pseudogymnoascus voru algengastir.
 

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