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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Autores principales: Mataloni, María Gabriela, Vinocur, Alicia Liliana, De Tezanos Pinto, Paula
Publicado: 2005
Materias:
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
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v17_n2_p163_Mataloni
http://hdl.handle.net/20.500.12110/paper_09541020_v17_n2_p163_Mataloni
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_09541020_v17_n2_p163_Mataloni
record_format dspace
spelling paper:paper_09541020_v17_n2_p163_Mataloni2023-06-08T15:55:43Z Abiotic characterization and epilithic communities of a naturally enriched stream at Cierva Point, Antarctic Peninsula Mataloni, María Gabriela Vinocur, Alicia Liliana De Tezanos Pinto, Paula 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 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. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v17_n2_p163_Mataloni http://hdl.handle.net/20.500.12110/paper_09541020_v17_n2_p163_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 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, María Gabriela
Vinocur, Alicia Liliana
De Tezanos Pinto, Paula
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.
author Mataloni, María Gabriela
Vinocur, Alicia Liliana
De Tezanos Pinto, Paula
author_facet Mataloni, María Gabriela
Vinocur, Alicia Liliana
De Tezanos Pinto, Paula
author_sort Mataloni, María Gabriela
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
publishDate 2005
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v17_n2_p163_Mataloni
http://hdl.handle.net/20.500.12110/paper_09541020_v17_n2_p163_Mataloni
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AT vinocuralicialiliana abioticcharacterizationandepilithiccommunitiesofanaturallyenrichedstreamatciervapointantarcticpeninsula
AT detezanospintopaula abioticcharacterizationandepilithiccommunitiesofanaturallyenrichedstreamatciervapointantarcticpeninsula
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