Abiotic characterization and epilithic communities of a naturally enriched stream at Cierva Point, Antarctic Peninsula
Pingüinera Stream is one of the two main lotic environments of Cierva Point (Antarctic Specially Protected Area No. 134) on the Danco Coast, Antarctic Peninsula. It originates in a large snowfield, flows through a penguin rookery, moss and grass banks, discharging into Cierva Cove. During late Antar...
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ftunibueairesbd:todo:paper_09541020_v17_n2_p163_Mataloni 2023-10-29T02:32:28+01:00 Abiotic characterization and epilithic communities of a naturally enriched stream at Cierva Point, Antarctic Peninsula Mataloni, G. Vinocur, A. De Tezanos Pinto, P. https://hdl.handle.net/20.500.12110/paper_09541020_v17_n2_p163_Mataloni unknown http://hdl.handle.net/20.500.12110/paper_09541020_v17_n2_p163_Mataloni info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar Antarctic streams Ecology Epilithon Freshwater algae Nutrients Taxonomic composition arctic environment community structure freshwater ecosystem Antarctic Peninsula Antarctica Arctic and Antarctic West Antarctica World algae Bryophyta Chamaesiphon subglobosus Chlorophyta Cyanobacteria Cyanobacterium (genus) Leptolyngbya Prasiola calophylla Spheniscidae JOUR ftunibueairesbd https://doi.org/20.500.12110/paper_09541020_v17_n2_p163_Mataloni 2023-10-05T01:50:57Z Pingüinera Stream is one of the two main lotic environments of Cierva Point (Antarctic Specially Protected Area No. 134) on the Danco Coast, Antarctic Peninsula. It originates in a large snowfield, flows through a penguin rookery, moss and grass banks, discharging into Cierva Cove. During late Antarctic summer 2003, we sampled the stream at six locations along its course. Abiotic features characterize it as a clear water system, yet receiving a very high amount of PO4-P and NH4-N from the rookery. These nutrients decrease downstream mainly due to uptake by epilithic algae and oxidation of NH4 + to NO3 -, consequently lowering pH and dissolved O2, which was always under-saturated. Strong correlations between all these parameters support these findings. The epilithic algal community shows both temporal and spatial changes in biomass, composition and relative frequencies. Dominant species at the higher reach of the stream are cyanobacteria, mainly Chamaesiphon subglobosus (Rostafinski) Lemm. and a mesh of Leptolyngbya spp. filaments. The chlorophyta Prasiola calophylla (Carmich.) Menegh. dominates the community in oxygenated, fast-flowing reaches. Comparison with the other main stream from Cierva Point, which is not influenced by the rookery, shows that growth and survival of the epilithic community in this area is limited by factors other than nutrient concentrations. © Antarctic Science Ltd. Fil:Mataloni, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vinocur, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:De Tezanos Pinto, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Arctic West Antarctica Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
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Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
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ftunibueairesbd |
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topic |
Antarctic streams Ecology Epilithon Freshwater algae Nutrients Taxonomic composition arctic environment community structure freshwater ecosystem Antarctic Peninsula Antarctica Arctic and Antarctic West Antarctica World algae Bryophyta Chamaesiphon subglobosus Chlorophyta Cyanobacteria Cyanobacterium (genus) Leptolyngbya Prasiola calophylla Spheniscidae |
spellingShingle |
Antarctic streams Ecology Epilithon Freshwater algae Nutrients Taxonomic composition arctic environment community structure freshwater ecosystem Antarctic Peninsula Antarctica Arctic and Antarctic West Antarctica World algae Bryophyta Chamaesiphon subglobosus Chlorophyta Cyanobacteria Cyanobacterium (genus) Leptolyngbya Prasiola calophylla Spheniscidae Mataloni, G. Vinocur, A. De Tezanos Pinto, P. Abiotic characterization and epilithic communities of a naturally enriched stream at Cierva Point, Antarctic Peninsula |
topic_facet |
Antarctic streams Ecology Epilithon Freshwater algae Nutrients Taxonomic composition arctic environment community structure freshwater ecosystem Antarctic Peninsula Antarctica Arctic and Antarctic West Antarctica World algae Bryophyta Chamaesiphon subglobosus Chlorophyta Cyanobacteria Cyanobacterium (genus) Leptolyngbya Prasiola calophylla Spheniscidae |
description |
Pingüinera Stream is one of the two main lotic environments of Cierva Point (Antarctic Specially Protected Area No. 134) on the Danco Coast, Antarctic Peninsula. It originates in a large snowfield, flows through a penguin rookery, moss and grass banks, discharging into Cierva Cove. During late Antarctic summer 2003, we sampled the stream at six locations along its course. Abiotic features characterize it as a clear water system, yet receiving a very high amount of PO4-P and NH4-N from the rookery. These nutrients decrease downstream mainly due to uptake by epilithic algae and oxidation of NH4 + to NO3 -, consequently lowering pH and dissolved O2, which was always under-saturated. Strong correlations between all these parameters support these findings. The epilithic algal community shows both temporal and spatial changes in biomass, composition and relative frequencies. Dominant species at the higher reach of the stream are cyanobacteria, mainly Chamaesiphon subglobosus (Rostafinski) Lemm. and a mesh of Leptolyngbya spp. filaments. The chlorophyta Prasiola calophylla (Carmich.) Menegh. dominates the community in oxygenated, fast-flowing reaches. Comparison with the other main stream from Cierva Point, which is not influenced by the rookery, shows that growth and survival of the epilithic community in this area is limited by factors other than nutrient concentrations. © Antarctic Science Ltd. Fil:Mataloni, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vinocur, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:De Tezanos Pinto, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. |
format |
Journal/Newspaper |
author |
Mataloni, G. Vinocur, A. De Tezanos Pinto, P. |
author_facet |
Mataloni, G. Vinocur, A. De Tezanos Pinto, P. |
author_sort |
Mataloni, G. |
title |
Abiotic characterization and epilithic communities of a naturally enriched stream at Cierva Point, Antarctic Peninsula |
title_short |
Abiotic characterization and epilithic communities of a naturally enriched stream at Cierva Point, Antarctic Peninsula |
title_full |
Abiotic characterization and epilithic communities of a naturally enriched stream at Cierva Point, Antarctic Peninsula |
title_fullStr |
Abiotic characterization and epilithic communities of a naturally enriched stream at Cierva Point, Antarctic Peninsula |
title_full_unstemmed |
Abiotic characterization and epilithic communities of a naturally enriched stream at Cierva Point, Antarctic Peninsula |
title_sort |
abiotic characterization and epilithic communities of a naturally enriched stream at cierva point, antarctic peninsula |
url |
https://hdl.handle.net/20.500.12110/paper_09541020_v17_n2_p163_Mataloni |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Arctic West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Arctic West Antarctica |
op_relation |
http://hdl.handle.net/20.500.12110/paper_09541020_v17_n2_p163_Mataloni |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar |
op_doi |
https://doi.org/20.500.12110/paper_09541020_v17_n2_p163_Mataloni |
_version_ |
1781053919211814912 |