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| 2. |
- Heidmarsson, Starri, et al.
(författare)
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Classification of lichen photomorphs
- 1997
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Ingår i: Taxon. - : Wiley. - 0040-0262 .- 1996-8175. ; :46, s. 519-520
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Tidskriftsartikel (refereegranskat)
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| 3. |
- Heidmarsson, Starri
(författare)
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Taxonomy and phylogeny of Dermatocarpon (Verrucariales, lichenized Ascomycotina) with special emphasis on the Nordic species
- 2000
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In this thesis Dermatocarpon (Verrucariales, lichenized Ascomycotina) of the Nordic countries is revised. Useful characters for species identification are epinecral layer type, spore length, medulla sensitivity to Melzer´s Reagent, and lower surface colour anappearance. The pruinosity of certain members of Dermatocarpon, which earlier was considered an important character, is caused by an epinecral layer consisting of air filled cells. In all eight species Dermatocarpon in the Nordic countries are accepted.The relationships of D. bachmannii and D. deminuens are studied in detail using statistical methods. Both PCA and t-test are utilized and the results indicate that although the two species are closely related they should be treated as distin species.Dermatocarpon miniatum is a common and widely distributed species which shows a considerable morphological plasticity. The D. miniatum-complex is studied by molecular methods. The ITS and 5.8S areas of the rDNA were sequenced for 25 representatives of the D. miniatum-complex and 21 representatives of other Dermatocarpon species. D. leptophyllum, D. linkolae, and D. miniatum var. cirsodes are monophyletic units, but considered synonyms of D. miniatum. D. miniatum var. miniatum and D. miniatum var. complicatum are polyphyletic and should not be treateds separate taxa. An undescribed species similar to D. miniatum from the southern part of North America is discussed.
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| 4. |
- Onuţ-Brännström, Ioana, et al.
(författare)
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Sharing of photobionts in sympatric populations of Thamnolia and Cetraria lichens : evidence from high-throughput sequencing
- 2018
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Ingår i: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 8
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Tidskriftsartikel (refereegranskat)abstract
- In this study, we explored the diversity of green algal symbionts (photobionts) in sympatric populations of the cosmopolitan lichen-forming fungi Thamnolia and Cetraria. We sequenced with both Sanger and Ion Torrent High-Throughput Sequencing technologies the photobiont ITS-region of 30 lichen thalli from two islands: Iceland and Öland. While Sanger recovered just one photobiont genotype from each thallus, the Ion Torrent data recovered 10–18 OTUs for each pool of 5 lichen thalli, suggesting that individual lichens can contain heterogeneous photobiont populations. Both methods showed evidence for photobiont sharing between Thamnolia and Cetraria on Iceland. In contrast, our data suggest that on Öland the two mycobionts associate with distinct photobiont communities, with few shared OTUs revealed by Ion Torrent sequencing. Furthermore, by comparing our sequences with public data, we identified closely related photobionts from geographically distant localities. Taken together, we suggest that the photobiont composition in Thamnolia and Cetraria results from both photobiont-mycobiont codispersal and local acquisition during mycobiont establishment and/or lichen growth. We hypothesize that this is a successful strategy for lichens to be flexible in the use of the most adapted photobiont for the environment.
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| 5. |
- Taylor, Jason J., et al.
(författare)
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Arctic terrestrial biodiversity status and trends: A synopsis of science supporting the CBMP State of Arctic Terrestrial Biodiversity Report
- 2020
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Ingår i: Ambio. - : Springer Science and Business Media LLC. - 0044-7447 .- 1654-7209. ; 49:3, s. 833-847
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Tidskriftsartikel (refereegranskat)abstract
- This review provides a synopsis of the main findings of individual papers in the special issue Terrestrial Biodiversity in a Rapidly Changing Arctic. The special issue was developed to inform the State of the Arctic Terrestrial Biodiversity Report developed by the Circumpolar Biodiversity Monitoring Program (CBMP) of the Conservation of Arctic Flora and Fauna (CAFF), Arctic Council working group. Salient points about the status and trends of Arctic biodiversity and biodiversity monitoring are organized by taxonomic groups: (1) vegetation, (2) invertebrates, (3) mammals, and (4) birds. This is followed by a discussion about commonalities across the collection of papers, for example, that heterogeneity was a predominant pattern of change particularly when assessing global trends for Arctic terrestrial biodiversity. Finally, the need for a comprehensive, integrated, ecosystem-based monitoring program, coupled with targeted research projects deciphering causal patterns, is discussed.
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