The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration?
The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? ARVE ELVEBAKK, JARLE W. BJERKE and LENNART NILSEN Elvebakk, A., Bjerke, J.W. & Nilsen, L. 2018. The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of...
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ftninstnf:oai:brage.nina.no:11250/2483493 2023-05-15T14:48:21+02:00 The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? Elvebakk, Arve Bjerke, Jarle W. Nilsen, Lennart 2018 application/pdf http://hdl.handle.net/11250/2483493 eng eng Graphis Scripta. 2018, 30 (1), 1-11. urn:issn:0901-7593 http://hdl.handle.net/11250/2483493 cristin:1555774 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 1-11 30 Graphis Scripta 1 Journal article Peer reviewed 2018 ftninstnf 2021-12-23T07:17:12Z The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? ARVE ELVEBAKK, JARLE W. BJERKE and LENNART NILSEN Elvebakk, A., Bjerke, J.W. & Nilsen, L. 2018. The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? Graphis Scripta 30 (1): 1–11. Oslo. ISSN 2002-4495. Allocetraria madreporiformis is a small, finger-like, fruticose lichen with isolated occurrences in the inner fiord section of the long, straight fiord Wijdefjorden in Svalbard. Several new localities are added and mapped here, and we show that the species is confined to exclusive high-arctic steppe habitats on fine-textured, moderately alkaline soil, exposed to wind erosion and aeolian transport of silt and sand. It avoids the most saline steppes and adjacent tundra areas, as indicated by numerous pH samples of mineral soils from sites with and without occurrences of A. madreporiformis. In this open habitat, all otherwise common arctic-alpine fruticose lichen species were absent or extremely rare, and a cryptogamic cover was very depauperate. On Svalbard, this species is an exclusive character species of the steppe areas in Inner Wijdefjorden National Park. The genus Allocetraria is strongly centred in the Sino-Himalayan area. It is discussed here that it probably evolved as a response to the very extensive new habitats formed during a series of Qinghai-Tibetan Plateau uplift and orogeny events taking place 25–1.6 Ma. This and other aspects affecting current classification alternatives of cetrarioid lichens are also discussed. The habitat preferences of A. madreporiformis appear to have been largely defined by the conditions of its probable area of origin in steppe-like habitats of the northern part of the Qinghai-Tibetan Plateau. publishedVersion Article in Journal/Newspaper Arctic Svalbard Tundra Wijdefjord* Norwegian Institute for Nature Research: Brage NINA Arctic Arve ENVELOPE(-22.183,-22.183,73.700,73.700) Elvebakk ENVELOPE(13.716,13.716,66.945,66.945) Svalbard Wijdefjorden ENVELOPE(15.569,15.569,79.543,79.543) |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
description |
The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? ARVE ELVEBAKK, JARLE W. BJERKE and LENNART NILSEN Elvebakk, A., Bjerke, J.W. & Nilsen, L. 2018. The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? Graphis Scripta 30 (1): 1–11. Oslo. ISSN 2002-4495. Allocetraria madreporiformis is a small, finger-like, fruticose lichen with isolated occurrences in the inner fiord section of the long, straight fiord Wijdefjorden in Svalbard. Several new localities are added and mapped here, and we show that the species is confined to exclusive high-arctic steppe habitats on fine-textured, moderately alkaline soil, exposed to wind erosion and aeolian transport of silt and sand. It avoids the most saline steppes and adjacent tundra areas, as indicated by numerous pH samples of mineral soils from sites with and without occurrences of A. madreporiformis. In this open habitat, all otherwise common arctic-alpine fruticose lichen species were absent or extremely rare, and a cryptogamic cover was very depauperate. On Svalbard, this species is an exclusive character species of the steppe areas in Inner Wijdefjorden National Park. The genus Allocetraria is strongly centred in the Sino-Himalayan area. It is discussed here that it probably evolved as a response to the very extensive new habitats formed during a series of Qinghai-Tibetan Plateau uplift and orogeny events taking place 25–1.6 Ma. This and other aspects affecting current classification alternatives of cetrarioid lichens are also discussed. The habitat preferences of A. madreporiformis appear to have been largely defined by the conditions of its probable area of origin in steppe-like habitats of the northern part of the Qinghai-Tibetan Plateau. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Elvebakk, Arve Bjerke, Jarle W. Nilsen, Lennart |
spellingShingle |
Elvebakk, Arve Bjerke, Jarle W. Nilsen, Lennart The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? |
author_facet |
Elvebakk, Arve Bjerke, Jarle W. Nilsen, Lennart |
author_sort |
Elvebakk, Arve |
title |
The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? |
title_short |
The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? |
title_full |
The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? |
title_fullStr |
The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? |
title_full_unstemmed |
The lichen Allocetraria madreporiformis in high-arctic steppes on Svalbard: a result of out-of-Tibet migration? |
title_sort |
lichen allocetraria madreporiformis in high-arctic steppes on svalbard: a result of out-of-tibet migration? |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2483493 |
long_lat |
ENVELOPE(-22.183,-22.183,73.700,73.700) ENVELOPE(13.716,13.716,66.945,66.945) ENVELOPE(15.569,15.569,79.543,79.543) |
geographic |
Arctic Arve Elvebakk Svalbard Wijdefjorden |
geographic_facet |
Arctic Arve Elvebakk Svalbard Wijdefjorden |
genre |
Arctic Svalbard Tundra Wijdefjord* |
genre_facet |
Arctic Svalbard Tundra Wijdefjord* |
op_source |
1-11 30 Graphis Scripta 1 |
op_relation |
Graphis Scripta. 2018, 30 (1), 1-11. urn:issn:0901-7593 http://hdl.handle.net/11250/2483493 cristin:1555774 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
_version_ |
1766319440695132160 |