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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crcambridgeupr:10.1017/s0954102005002579 2024-03-03T08:39:19+00:00 Abiotic characterization and epilithic communities of a naturally enriched stream at Cierva Point, Antarctic Peninsula MATALONI, GABRIELA VINOCUR, ALICIA de TEZANOS PINTO, PAULA 2005 http://dx.doi.org/10.1017/s0954102005002579 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102005002579 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 17, issue 2, page 163-170 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2005 crcambridgeupr https://doi.org/10.1017/s0954102005002579 2024-02-08T08:43:15Z 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 PO 4 -P and NH 4 - N from the rookery. These nutrients decrease downstream mainly due to uptake by epilithic algae and oxidation of NH 4 + to NO 3 - , consequently lowering pH and dissolved O 2 , 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science Cambridge University Press Antarctic Antarctic Peninsula Cierva ENVELOPE(-60.873,-60.873,-64.156,-64.156) Danco ENVELOPE(-61.033,-61.033,-64.717,-64.717) Danco Coast ENVELOPE(-62.000,-62.000,-64.700,-64.700) Cierva Point ENVELOPE(-60.967,-60.967,-64.150,-64.150) Cierva Cove ENVELOPE(-60.883,-60.883,-64.150,-64.150) Pingüinera ENVELOPE(-60.800,-60.800,-62.450,-62.450) Antarctic Science 17 2 163 170 |
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Open Polar |
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Cambridge University Press |
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English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
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Geology Ecology, Evolution, Behavior and Systematics Oceanography MATALONI, GABRIELA VINOCUR, ALICIA de TEZANOS PINTO, PAULA Abiotic characterization and epilithic communities of a naturally enriched stream at Cierva Point, Antarctic Peninsula |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
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 PO 4 -P and NH 4 - N from the rookery. These nutrients decrease downstream mainly due to uptake by epilithic algae and oxidation of NH 4 + to NO 3 - , consequently lowering pH and dissolved O 2 , 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. |
format |
Article in Journal/Newspaper |
author |
MATALONI, GABRIELA VINOCUR, ALICIA de TEZANOS PINTO, PAULA |
author_facet |
MATALONI, GABRIELA VINOCUR, ALICIA de TEZANOS PINTO, PAULA |
author_sort |
MATALONI, 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 |
publisher |
Cambridge University Press (CUP) |
publishDate |
2005 |
url |
http://dx.doi.org/10.1017/s0954102005002579 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102005002579 |
long_lat |
ENVELOPE(-60.873,-60.873,-64.156,-64.156) ENVELOPE(-61.033,-61.033,-64.717,-64.717) ENVELOPE(-62.000,-62.000,-64.700,-64.700) ENVELOPE(-60.967,-60.967,-64.150,-64.150) ENVELOPE(-60.883,-60.883,-64.150,-64.150) ENVELOPE(-60.800,-60.800,-62.450,-62.450) |
geographic |
Antarctic Antarctic Peninsula Cierva Danco Danco Coast Cierva Point Cierva Cove Pingüinera |
geographic_facet |
Antarctic Antarctic Peninsula Cierva Danco Danco Coast Cierva Point Cierva Cove Pingüinera |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science |
op_source |
Antarctic Science volume 17, issue 2, page 163-170 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102005002579 |
container_title |
Antarctic Science |
container_volume |
17 |
container_issue |
2 |
container_start_page |
163 |
op_container_end_page |
170 |
_version_ |
1792494794093625344 |