Influence of microenvironment on the spatial distribution of Himantormia lugubris (Parmeliaceae) in ASPA No. 171, maritime Antarctic

Choi, Seung Ho; Kim, Seok Cheol; Hong, Soon Gyu; Lee, Kyu Song

doi:10.5141/ecoenv.2015.052

Cited by 5 publications

(5 citation statements)

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“…If the scale is bigger as middle and large sizes, distinctive environmental gradients according to snow melting can be confirmed and differences of vegetation types according to them are also very clear (Kim et al 2007). In the maritime Antarctic region including Barton Peninsular, distribution of vegetation is largely affected by micro-topography, particle size of ground surface substrates, water contents, and snow cover (Kim et al 2007, Garibotti et al 2011, Kim et al 2012, Favero-Longo et al 2012, Choi 2015. For lichens and mosses showing changes in coverage in the snow-covered period, there are four species: snow algae, crustose lichens, A. regularis, and U. aurantiaco-atra (Table 5).…”

Section: Discussionmentioning

confidence: 98%

“…Therefore, after various lichens and mosses are settled in snow-free locations, according to differences of resistances of each species against snow and moisture, communities are assembled and developed. The order and frequency of snow melting in coastal lowland areas in Barton Peninsula depends on topography and climatic fluctuation (Choi et al 2015).…”

Section: Discussionmentioning

confidence: 99%

“…A small area with complex topography in the maritime Antarctic region offers variety in the annual snow coverage continuity, snow depth, and water supply amount depending on climatic fluctuation and has environmental gradients with consistent direction (Kim et al 2007, Favero-Longo et al 2012. Even in the same year, depending on micro-topography, there may be different gradients in snow melting time, period of snow cover, and water supply capacity (Choi 2015;Choi et al 2015). Therefore, small areas with complex topography are a proper site for experiment to study the establishment of vegetation according to the extension of progressively exposed areas, their vegetation succession, and responses of biotic communities to climatic fluctuation.…”

Section: Introductionmentioning

confidence: 99%

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Assembly processes of moss and lichen community with snow melting at the coastal region of the Barton Peninsula, maritime Antarctic

Kim

Hong

et al. 2016

j ecology environ

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Background: In this article, it was analyzed how snow melting affects the assembly of lichen and moss communities in a small area of the coastal region of Barton Peninsula, which is in maritime Antarctic. In the small area, even though there is a huge gap of difference of the environment between the snow-filled area and snow-melt one, the latter did not have distinctive environmental gradients. Results: Depending on the snow melting time, coverage and species diversity of lichens and mosses tend to increase remarkably. For species with significant changes depending on the snow-covered period, there are Andreaea regularis, crustose lichens, Placopsis contortuplicata, Usnea aurantiaco-atra, and snow algae. In this area, the process of vegetation assembly process has shown the directional development in the order of snow algae→crustose, lichen sub-formation→fruticose lichen, moss cushion sub-formation (Andreaea sociation)→fruticose lichen, and moss cushion sub-formation (Usnea sociation), according to the order of snow melting. These directional development stages are shown in gradual change in small area with the snow melting phenomena. However, in the snow-free area, where water is sufficiently supplied, it is expected that moss carpet sub-formation (Sanionia sociation) will be developed. Vegetation development in the small area with the snow melting phenomena, depending on differences of resistance on snow kill and moisture settled by species in according to the time of snow melting, tolerance model to form community is followed. Conclusions: The research results explain the development of vegetation in the Antarctic tundra and its spatial distribution according to the period for growth of lichens and mosses in the summer time by differences of snow melting in the small area. In the future, if research for the community development process in a large scale will be done, it will be helpful to figure out temporal and spatial dynamic of vegetation in the Antarctic tundra where snow and glaciers melt rapidly due to climatic warming.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assembly processes of moss and lichen community with snow melting at the coastal region of the Barton Peninsula, maritime Antarctic

Kim

Hong

et al. 2016

j ecology environ

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“…Such discrepancies in the community structure, where a biodiverse reservoir of dormant bacteria was created, indicates that H. lugubris undergoes seasonal changes within intrathallic conditions (Cruaud et al 2020 ). What is known of H. lugubris ecophysiology is that it has great tolerance for desiccation, as well as being covered with snow for extended periods of time (Choi et al 2015 ). It has also been concluded that the production of inhibitory phenolic compounds ceases in H. lugubris during sunlight exposure (Mateos et al 1991 ).…”

Section: Discussionmentioning

confidence: 99%

Bacterial communities of Antarctic lichens explored by gDNA and cDNA 16S rRNA gene amplicon sequencing

Woltyńska

Gawor

Olech

et al. 2023

FEMS Microbiology Ecology

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Recently, lichens came once more into the scientific spotlight due to their unique relations with Prokaryotes. Several temperate region lichen species have been thoroughly explored in this regard yet, the information on Antarctic lichens and their associated bacteriobiomes is somewhat lacking. In this paper we assessed the phylogenetic structure of the whole and active fractions of bacterial communities housed by Antarctic lichens growing in different environmental conditions by targeted 16S rRNA gene amplicon sequencing. Bacterial communities associated with lichens procured from a nitrogen enriched site were very distinct from the communities isolated from lichens of a nitrogen depleted site. The former were characterized by substantial contributions of Bacteroidetes phylum members and the elusive Armatimonadetes. At the nutrient-poor site the lichen-associated bacteriobiome structure was unique for each lichen species, with chlorolichens being occupied largely by Proteobacteria. Lichen species with a pronounced discrepancy in diversity between the whole and active fractions of their bacterial communities had the widest ecological amplitude, hinting that the non-active part of the community is a reservoir of latent stress coping mechanisms. This is the first investigation to make use of targeted metatranscriptomics to infer the bacterial biodiversity in Antarctic lichens.

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“…These plant communities are predominantly cryptogamic, also known as lower plants or biological soil crusts (BSC) (Convey, 2010), and their growth season length depends on the climatic conditions, latitude, and relief (Selkirk & Skotnicki, 2007). The availability of liquid water is the most critical factor for the development of vegetation communities in Antarctica, which is available during few months when snow melts and summers rain occurs, or when the humidity can be absorbed directly from the air (Elster, 2002;Bölter et al, 2002;Choi et al, 2015). As a result, the expansion of vegetated areas occurs at a very slow rate in the Antarctic Maritime region (Fritsen & Priscu, 1998;Convey, 2006).…”

Section: Introductionmentioning

confidence: 99%

Mapping vegetation types in Antarctic Peninsula and South Shetlands islands using Sentinel-2 images and Google Earth Engine cloud computing

Fonseca

Santos

Figueiredo

et al. 2021

Preprint

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The Antarctic vegetation maps are usually made using very high-resolution images collected by orbital sensors or unmanned aerial vehicles, generating isolated maps with information valid only for the time of image acquisition. In the context of global environmental change, mapping the current Antarctic vegetation distribution on a regular basis is necessary for a better understanding of the changes in this fragile environment. This work aimed to generate validated vegetation maps for the North Antarctic Peninsula and South Shetlands Islands based on Sentinel-2 images using cloud processing. Sentinel-2 imagery level 1C, acquired between 2016 and 2021 (January-April), were used. Land pixels were masked with the minimum value composite image for the "water vapor" band. The NDVI maximum value composite image was sliced, and its classes were associated with the occurrence of algae (0.15 - 0.20), lichens (0.20 - 0.50), and mosses (0.50 - 0.80). The vegetation map was validated by comparing it with those from the literature. The present study showed that Sentinel-2 images allow building a validated vegetation type distribution map for Antarctica Peninsula and South Shetlands Islands.

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Influence of microenvironment on the spatial distribution of Himantormia lugubris (Parmeliaceae) in ASPA No. 171, maritime Antarctic

Cited by 5 publications

References 10 publications

Assembly processes of moss and lichen community with snow melting at the coastal region of the Barton Peninsula, maritime Antarctic

Assembly processes of moss and lichen community with snow melting at the coastal region of the Barton Peninsula, maritime Antarctic

Bacterial communities of Antarctic lichens explored by gDNA and cDNA 16S rRNA gene amplicon sequencing

Mapping vegetation types in Antarctic Peninsula and South Shetlands islands using Sentinel-2 images and Google Earth Engine cloud computing

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