Structure and diversity of soil algal communities from Cierva Point (Antarctic Peninsula)
Cyanobacteria and eukaryotic algae, together with bacteria and fungi, are known to be primary colonizers of mineral soils throughout Antarctica. Their species diversity and soil coverage were studied in 18 soil polygons located at Cierva Point, Antarctic Peninsula. Undisturbed assemblages were domin...
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v23_n3_p205_Mataloni http://hdl.handle.net/20.500.12110/paper_07224060_v23_n3_p205_Mataloni |
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paper:paper_07224060_v23_n3_p205_Mataloni2023-06-08T15:43:28Z Structure and diversity of soil algal communities from Cierva Point (Antarctic Peninsula) Mataloni, María Gabriela algal community community structure soil microorganism species diversity Antarctica Cierva Point Chlorophyta Tribophyceae Cyanobacteria and eukaryotic algae, together with bacteria and fungi, are known to be primary colonizers of mineral soils throughout Antarctica. Their species diversity and soil coverage were studied in 18 soil polygons located at Cierva Point, Antarctic Peninsula. Undisturbed assemblages were dominated by filamentous Cyanobacteria and diatoms, whilst almost 40% of the 49 species recorded were observed only after enrichment culture. Nearly all of the isolates from enrichment cultures were Chlorophyta and Tribophyceae. This revealed a higher degree of complexity than reported for similar communities on Signy Island. Water content and concentrations of nutrients were determined at four representative sites, and did not appear to account for the large inter-polygon variation found in species composition and relative frequencies of occurrence. Variables describing community development were not significantly correlated with either area of the polygons or the minimum distance between them. This suggested that these features are not an important short-range barrier to dispersal for those 'weed' species dominating the community. Conversely, the relative frequencies of some of the most common species showed significant correlations with species diversity and soil coverage, and it is suggested that biotic interactions could account to a larger extent for community structure than previously reported from Signy Island fellfields. Fil:Mataloni, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v23_n3_p205_Mataloni http://hdl.handle.net/20.500.12110/paper_07224060_v23_n3_p205_Mataloni |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
algal community community structure soil microorganism species diversity Antarctica Cierva Point Chlorophyta Tribophyceae |
| spellingShingle |
algal community community structure soil microorganism species diversity Antarctica Cierva Point Chlorophyta Tribophyceae Mataloni, María Gabriela Structure and diversity of soil algal communities from Cierva Point (Antarctic Peninsula) |
| topic_facet |
algal community community structure soil microorganism species diversity Antarctica Cierva Point Chlorophyta Tribophyceae |
| description |
Cyanobacteria and eukaryotic algae, together with bacteria and fungi, are known to be primary colonizers of mineral soils throughout Antarctica. Their species diversity and soil coverage were studied in 18 soil polygons located at Cierva Point, Antarctic Peninsula. Undisturbed assemblages were dominated by filamentous Cyanobacteria and diatoms, whilst almost 40% of the 49 species recorded were observed only after enrichment culture. Nearly all of the isolates from enrichment cultures were Chlorophyta and Tribophyceae. This revealed a higher degree of complexity than reported for similar communities on Signy Island. Water content and concentrations of nutrients were determined at four representative sites, and did not appear to account for the large inter-polygon variation found in species composition and relative frequencies of occurrence. Variables describing community development were not significantly correlated with either area of the polygons or the minimum distance between them. This suggested that these features are not an important short-range barrier to dispersal for those 'weed' species dominating the community. Conversely, the relative frequencies of some of the most common species showed significant correlations with species diversity and soil coverage, and it is suggested that biotic interactions could account to a larger extent for community structure than previously reported from Signy Island fellfields. |
| author |
Mataloni, María Gabriela |
| author_facet |
Mataloni, María Gabriela |
| author_sort |
Mataloni, María Gabriela |
| title |
Structure and diversity of soil algal communities from Cierva Point (Antarctic Peninsula) |
| title_short |
Structure and diversity of soil algal communities from Cierva Point (Antarctic Peninsula) |
| title_full |
Structure and diversity of soil algal communities from Cierva Point (Antarctic Peninsula) |
| title_fullStr |
Structure and diversity of soil algal communities from Cierva Point (Antarctic Peninsula) |
| title_full_unstemmed |
Structure and diversity of soil algal communities from Cierva Point (Antarctic Peninsula) |
| title_sort |
structure and diversity of soil algal communities from cierva point (antarctic peninsula) |
| publishDate |
2000 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v23_n3_p205_Mataloni http://hdl.handle.net/20.500.12110/paper_07224060_v23_n3_p205_Mataloni |
| work_keys_str_mv |
AT matalonimariagabriela structureanddiversityofsoilalgalcommunitiesfromciervapointantarcticpeninsula |
| _version_ |
1768546679780278272 |