English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/74333
logo share SHARE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Stability and endemicity of benthic diatom assemblages from different substrates in a maritime stream on Byers Peninsula, Livingston Island, Antarctica: the role of climate variability

AuthorsPla-Rabes, S.; Toro, M.; van der Vijver, Bart; Rochera, C.; Villaescusa, Juan Antonio; Camacho, Antonio; Quesada, Antonio
Species association
Climate change
Community turnover
Issue Date2013
PublisherCambridge University Press
CitationAntarctic Science 25(2) : 254–269 (2013)
AbstractDiatom assemblages from four different substrates from a stream on Byers Peninsula were analysed during the summer. The substrate type was the main factor explaining the variability in the diatom assemblages. Sandy biofilms showed a higher diversity and a greater number of endemic species. Two main hydrological regimes were observed: 1) a hydrologically unstable period with high variability in stream flow and successive freezing and thawing periods, 2) a late summer hydrologically stable period, characterized by low stream velocity and variability. The structure of the diatom communities was different between the two hydrological periods, although the substrate modulated the difference. The diatom assemblages showed low similarity among the substrates and high dominance of endemic species during early summer. The late summer community showed high dominance of motile cosmopolitan species on all substrate types. As the length of both hydrological regimes would ultimately be driven by climatic variability, the predicted climate warming could reduce overall stream diversity. Hence, subtle changes could alter the length of both hydrological periods. The relationship between diatom species association with different substrates and hydrological regimes could be relevant for tracking past climate variability using diatom palaeorecords.
Description16 páginas, 3 tablas, 9 figuras.
Publisher version (URL)http://dx.doi.org/10.1017/S0954102012000922
Appears in Collections:(CEAB) Artículos
Files in This Item:
File Description SizeFormat 
_ANS_ANS25_02_S0954102012000922a.pdf517,26 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.