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  • 1
    Electronic Resource
    Electronic Resource
    Temporal and spatial distribution of rotifera in a Chilean reservoir: A possible effect of impoundment hydrodynamics (1984)
    Springer
    Hydrobiologia 114 (1984), S. 67-74 
    Details
    ISSN: 1573-5117
    Keywords: Rotifera ; Keratella cochlearis ; population abundance changes ; water impoundment dynamics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Rotifers were sampled at monthly intervals for a year at four monitoring stations in Rapel Reservoir (a hydroelectric impoundment) in Central Chile (34°02′S; 71°35′W). Fifteen species were identified, but only Keratella cochlearis was consistently found at each station, it usually was the most abundant (〉 50% of total rotifers). Marked differences were found among sites; stations I and 2, those nearest to the dam, showed greatest rotifer densities in spring and autumn. Station 4, that nearest to the inflowing rivers, had its highest rotifer abundance in summer. Station 8 had the highest mean density but the least marked seasonal changes in rotifer numbers. The impoundment water dynamics and the relative locations within the lake (distance from the dam or from the rivers) are suggested as determinants for different rotifer assemblages and, probably, for most other planktonic organisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00016602
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Bacterial and archaeal diversity in high altitude wetlands of the Chilean Altiplano (2013)
    Schweizerbart
    In:  Fundamental and Applied Limnology : Archiv für Hydrobiologie, 182 (2). pp. 135-159.
    Details
    Publication Date: 2019-04-04
    Description: The microbial diversity of five unconnected high altitude (≥ 3800 m a.s.l.) wetlands from the Chilean Altiplano was analyzed by a culture-independent approach, using 16 S rRNA gene sequences of different microbial groups. The wetlands (Chungara Lake, Parinacota wetland, Piacota Lake, Salar de Huasco and Salar de Ascotan) differed in terms of habitat type and physicochemical properties. The bacterial communities of these systems were dominated by Bacteroidetes (24-94 % of the clones) and Proteobacteria (Alpha, Beta, Gamma and Delta subgroups) with smaller contributions by the Firmicutes, Actinobacteria, Planctomycetes, Verrucomicrobia, Chloroflexi, Cyanobacteria, Acidobacteria, Deinococcus-Thermus and Candidate Division WS3. Fourteen phylotypes matching Alphaproteobacteria were part of the marine Roseobacter clade, representing new clusters of this group. Archaeal diversity was much lower than that seen for bacteria, and was dominated by Euryarchaeota; however Crenarchaeota were also present. Considering the large differences in microbial community composition between sites and samples, the presence of eleven phylotypes common to two or more habitats is highlighted. The frequent presence of new taxa in different phylogenetic groups in the altiplanic wetlands studied here revealed the unique characteristics of Bacteria and Archaea in these fragile Andean ecosystems.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1127/1863-9135/2013/0393
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Unique clusters of Archaea in Salar de Huasco, an athalassohaline evaporitic basin of the Chilean Altiplano (2010)
    Oxford University Press
    In:  FEMS Microbiology Ecology, 73 (2). pp. 291-302.
    Details
    Publication Date: 2019-09-23
    Description: Analyses of clone libraries from water and sediments of different sites from Salar de Huasco, a high-altitude athalassohaline wetland in the Chilean Altiplano, revealed the presence of five unique clusters of uncultured Archaea that have not been previously reported or specifically assigned. These sequences were distantly related (83–96% sequence identity) to a limited number of other clone sequences and revealed no identity to cultured Archaea. The abundance of Archaea and Bacteria was estimated using qPCR and community composition was examined through the construction of clone libraries of archaeal 16S rRNA gene. Archaea were found to be dominant over Bacteria in sediments from two saline sites (sites H4: 6.31 × 104 and site H6: 1.37 × 104 μS cm−1) and in one of the water samples (freshwater from site H0: 607 μS cm−1). Euryarchaeotal sequences were more abundant than crenarchaeotal sequences. Many of the clone sequences (52%) were similar to uncultured archaeal groups found in marine ecosystems having identity values between 99% and 97%. A major fraction of the sequences (40%) were members of Methanobacteria, while others were included in the Marine Benthic Groups B and D, the Miscellaneous Crenarchaeotic Group, the Terrestrial Miscellaneous Euryarchaeotal Group, Marine Group I and Halobacteria. The presence of uncultured archaeal groups in Salar de Huasco extends their known distribution in inland waters, providing new clues about their possible function in the environment.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1111/j.1574-6941.2010.00891.x
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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