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Of mosses and men: Plant succession, soil development and soil carbon accretion in the sub-Arctic volcanic landscape of Hekla, Iceland

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dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Vilmundardóttir, Olga Kolbrún
dc.contributor.author Sigurmundsson, Friðþór Sófus
dc.contributor.author Pedersen, Gro
dc.contributor.author Belart, Joaquín M. C.
dc.contributor.author Kizel, Fadi
dc.contributor.author Falco, Nicola
dc.contributor.author Benediktsson, Jon Atli
dc.contributor.author Gísladóttir, Guðrún
dc.date.accessioned 2019-01-10T13:33:37Z
dc.date.available 2019-01-10T13:33:37Z
dc.date.issued 2018-10-07
dc.identifier.citation Vilmundardóttir, O. K., Sófus, F., Møller, G. B., Muñoz-Cobo, J., Kizel, F., Falco, N., … Gísladóttir, G. (2018). Of mosses and men: Plant succession, soil development and soil carbon accretion in the sub-Arctic volcanic landscape of Hekla, Iceland. Progress in Physical Geography: Earth and Environment, 42(6), 765–791. https://doi.org/10.1177/0309133318798754
dc.identifier.issn 0309-1333
dc.identifier.issn 1477-0296 (eISSN)
dc.identifier.uri https://hdl.handle.net/20.500.11815/969
dc.description Post-print (lokagerð höfundar)
dc.description.abstract Lava flows pose a hazard in volcanic environments and reset ecosystem development. A succession of dated lava flows provides the possibility to estimate the direction and rates of ecosystem development and can be used to predict future development. We examine plant succession, soil development and soil carbon (C) accretion on the historical (post 874 AD) lava flows formed by the Hekla volcano in south Iceland. Vegetation and soil measurements were conducted all around the volcano reflecting the diverse vegetation communities on the lavas, climatic conditions around Hekla mountain and various intensities in deposition of loose material. Multivariate analysis was used to identify groups with similar vegetation composition and patterns in the vegetation. The association of vegetation and soil parameters with lava age, mean annual temperature, mean annual precipitation and soil accumulation rate (SAR) was analysed. Soil carbon concentration increased with increasing lava age becoming comparable to concentrations found on the prehistoric lavas. The combination of a sub-Arctic climate, gradual soil thickening due to input of loose material and the specific properties of volcanic soils allow for continuing accumulation of soil carbon in the soil profile. Four successional stages were identified: initial colonization and cover coalescence (ICC) of Racomitrium lanuginosum and Stereocaulon spp. (lavas <70 years of age); secondary colonization (SC) – R. lanuginosum dominance (170−700 years); vascular plant dominance (VPD) (>600 years); and highland conditions/retrogression (H/R) by tephra deposition (70−860 years). The long time span of the SC stage indicates arrested development by the thick R. lanuginosum moss mat. The progression from SC into VPD was linked to age of the lava flows and soil depth, which was significantly deeper within the VPD stage. Birch was growing on lavas over 600 years old indicating the development towards birch woodland, the climax ecosystem in Iceland.
dc.description.sponsorship The Icelandic Research Fund, Rannís, Grant of Excellence no. 152266-052 (Project: EMMIRS).
dc.format.extent 765-791
dc.language.iso en
dc.publisher SAGE Publications
dc.relation.ispartofseries Progress in Physical Geography: Earth and Environment;42(6)
dc.rights info:eu-repo/semantics/openAccess
dc.subject Soil carbon stock
dc.subject Lava chronosequence
dc.subject Moss thickening rate
dc.subject Racomitrium lanuginosum
dc.subject Soil accumulation rate
dc.subject Soil depth
dc.subject Tephra deposition
dc.subject Hraunrennsli
dc.subject Jarðvegur
dc.subject Jarðvegsrannsóknir
dc.subject Gróðurfar
dc.subject Gjóska
dc.subject Mosar
dc.subject Hekla
dc.title Of mosses and men: Plant succession, soil development and soil carbon accretion in the sub-Arctic volcanic landscape of Hekla, Iceland
dc.type info:eu-repo/semantics/article
dc.description.version Peer Reviewed
dc.identifier.journal Progress in Physical Geography: Earth and Environment
dc.identifier.doi 10.1177/0309133318798754
dc.contributor.department Líf- og umhverfisvísindastofnun (HÍ)
dc.contributor.department Institute of Life and Environmental Sciences (UI)
dc.contributor.department Jarðvísindastofnun (HÍ)
dc.contributor.department Institute of Earth Sciences (UI)
dc.contributor.department Rafmagns- og tölvuverkfræðideild (HÍ)
dc.contributor.department Faculty of Electrical and Computer Engineering (UI)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)
dc.contributor.school School of Engineering and Natural Sciences (UI)

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