Diversity and spatial distribution of seaweeds in the South Shetland Islands, Antarctica: an updated database for environmental monitoring under climate change scenarios

Pellizzari, Franciane; Silva, Maria Crisllane Duarte da; Silva, E. M.; Medeiros, Amanda S.; Oliveira, Mariana C.; Yokoya, Nair S.; Pupo, Diclá; Rosa, Luiz Henrique; Colepicolo, Pio

doi:10.1007/s00300-017-2092-5

Cited by 50 publications

(43 citation statements)

References 33 publications

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“…Other free-living algae detected may constitute cysts or propagules of ice-and snow-dominating groups such as the Chlamydomonadales and Chlorellales (Brown et al, 2016;Anesio et al, 2017). Moreover, the presence of algal phylotypes of typical marine intertidal and shallow subtidal zones belonging into the Bryopsidales and Ulvales (Pellizzari et al, 2017) may be explained by the unique geographical display of our studied glacier foreland, located near the seashore.…”

Section: Discussionmentioning

confidence: 85%

Differential Colonization and Succession of Microbial Communities in Rock and Soil Substrates on a Maritime Antarctic Glacier Forefield

et al. 2020

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Glacier forefields provide a unique chronosequence to assess microbial or plant colonization and ecological succession on previously uncolonized substrates. Patterns of microbial succession in soils of alpine and subpolar glacier forefields are well documented but those affecting high polar systems, including moraine rocks, remain largely unexplored. In this study, we examine succession patterns in pioneering bacterial, fungal and algal communities developing on moraine rocks and soil at the Hurd Glacier forefield (Livingston Island, Antarctica). Over time, changes were produced in the microbial community structure of rocks and soils (ice-free for different lengths of time), which differed between both substrates across the entire chronosequence, especially for bacteria and fungi. In addition, fungal and bacterial communities showed more compositional consistency in soils than rocks, suggesting community assembly in each niche could be controlled by processes operating at different temporal and spatial scales. Microscopy revealed a patchy distribution of epilithic and endolithic lithobionts, and increasing endolithic colonization and microbial community complexity along the chronosequence. We conclude that, within relatively short time intervals, primary succession processes at polar latitudes involve significant and distinct changes in edaphic and lithic microbial communities associated with soil development and cryptogamic colonization.

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Section: Discussionmentioning

confidence: 85%

Differential Colonization and Succession of Microbial Communities in Rock and Soil Substrates on a Maritime Antarctic Glacier Forefield

et al. 2020

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“…According to Furbino et al (2014) representatives of this species were also not recovered from samples collected on Deception Island. This island is a quite particular ecosystem in Antarctica because is a circular volcano whose last eruption occurred in 1974; however, geothermal activity is still intense, resulting in shallow water temperature, pH and salinity anomalies, compared with the seawater physico-chemical patterns of the other surrounding islands (Pellizzari et al, 2016). Metschnikowia has been associated with the marine environment and can be recovered from different substrates (Kandasamy et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

“…Antarctic macroalgae are well adapted to the low temperatures due to its longer cold-water history after continental drift and biogeographical isolation of the region (Wiencke et al, 2006). In the Antarctic marine ecosystem macroalgae play an important role in nutrient cycles, production of oxygen, synthesis of secondary metabolites, substrate and shelter for other organisms, among other functions (Pellizzari et al, 2016). The Antarctic phycoflora presents a high degree of endemism.…”

Section: Introductionmentioning

confidence: 99%

Yeasts from macroalgae and lichens that inhabit the South Shetland Islands, Antarctica

Duarte

Passarini

Delforno

et al. 2016

Environ Microbiol Rep

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Antarctic terrestrial ecosystems are largely dominated by lichens, while shallow coastal environments are mainly covered by macroalgae. The aim of this study was to isolate and to evaluate the diversity of yeasts in different species of macroalgae and lichens collected in South Shetland Islands, Antarctica. A total of 405 yeasts were recovered (205 from macroalgae and 200 from lichens). The yeast community from macroalgae was most diversity than the yeast community from lichen. The dominance index was similar for both substrates. A total of 24 taxa from macroalgae and 18 from lichens were identified, and only 5 were common to both substrates. Metschnikowia australis, Mrakia sp., Rhodotorula glacialis and Glaciozyma litorale were the most abundant yeasts in macroalgae and Cryptococcus victoriae, Rhodotorula laryngis, Rhodotorula arctica, Trichosporon sp. 1 and Mrakia sp. were the most abundant in lichens. Based on molecular and phylogenetic analyses, four yeast from macroalgae and six from lichens were considered potential new species. This is the first study to report the yeast communities from the Antarctic macroalgae Himantothallus grandifolius and lichen Ramalina terebrata. Results suggest that Antarctic phyco and lichensphere represent a huge substrate for cold-adapted yeasts and enhanced the knowledge of the microbiota from extreme environments.

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“…Furthermore, we are aware of cases of recent natural dispersion between Patagonia and Antarctica (Pellizari et al 2016), and of rafting Phaeophyceae from Patagonia reaching the Uruguayan shelf (Scarabino and Ortega 2004), so it is possible to consider the dispersal of some taxa in the light of a climate global change scenario.…”

Section: Discussionmentioning

confidence: 99%

The seaweeds Myriogloea major Asensi (Chordariacea, Phaeophyceae) and Gayralia oxysperma (Kützing) K.L. Vinogradova ex Scagel et al. (Ulvophyceae, Chlorophyta): a case of range extension in the Southwestern Atlantic Ocean?

et al. 2016

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This study reports the first occurrences of the brown seaweed Myriogloea major Asensi (Chordariacea, Phaeophyceae) and the green seaweed Gayralia oxysperma (Kützing) K.L. Vinogradova ex Scagel et al. (Ulvophyceae, Chlorophyta) along the Uruguayan coast. These new records could represent respectively a northward and southward range extension for M. major and G. oxysperma in the Southwestern Atlantic. These findings are particularly relevant since the Uruguayan coast has been highlighted as one of the least studied areas in the Southern Atlantic concerning macroalgal diversity, despite its phytogeographic relevance as an ecotone between the adjacent biogeographic provinces. Further research regarding seaweed diversity and distribution in the Uruguayan coast is demanded, in order to update the list of the marine phycoflora. Molecular approaches should be mandatory, since the presence of several cryptic species, such as Myriogloea and Gayralia, in the area has been reported. Considering the biogeographic relevance of the area, and the pressing needs to relate these new records with changes in regional circulation patterns, global meteoceanographic changes and/or anthropic introductions, these new occurrences highlights the need for urgent sampling surveys in the area.

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Diversity and spatial distribution of seaweeds in the South Shetland Islands, Antarctica: an updated database for environmental monitoring under climate change scenarios

Cited by 50 publications

References 33 publications

Differential Colonization and Succession of Microbial Communities in Rock and Soil Substrates on a Maritime Antarctic Glacier Forefield

Differential Colonization and Succession of Microbial Communities in Rock and Soil Substrates on a Maritime Antarctic Glacier Forefield

Yeasts from macroalgae and lichens that inhabit the South Shetland Islands, Antarctica

The seaweeds Myriogloea major Asensi (Chordariacea, Phaeophyceae) and Gayralia oxysperma (Kützing) K.L. Vinogradova ex Scagel et al. (Ulvophyceae, Chlorophyta): a case of range extension in the Southwestern Atlantic Ocean?

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