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Wednesday, July 15, 2020 | History

2 edition of Analysing benthic communities in the Weddell Sea (Antarctica) found in the catalog.

Analysing benthic communities in the Weddell Sea (Antarctica)

NuМЃria TeixidoМЃ Ullod

Analysing benthic communities in the Weddell Sea (Antarctica)

a landscape approach = Analyse der Benthosgemeinschaften im Weddellmeer (Antarktis) : ein landschaftsökologischer Ansatz

by NuМЃria TeixidoМЃ Ullod

  • 214 Want to read
  • 18 Currently reading

Published by Alfred-Wegener-Institut für Polar- und Meeresforschung, Vertrieb durch K. Kamloth in Bremerhaven, Bremen .
Written in English

    Places:
  • Antarctica,
  • Weddell Sea.
    • Subjects:
    • Benthos -- Antarctica -- Weddell Sea.

    • Edition Notes

      Other titlesAnalyse der Benthosgemeinschaften im Weddellmeer (Antarktis)
      StatementNúria Teixidó Ullod.
      SeriesBerichte zur Polar- und Meeresforschung,, 459
      Classifications
      LC ClassificationsQH91.8.B4 U45 2003
      The Physical Object
      Paginationx, 133 p. :
      Number of Pages133
      ID Numbers
      Open LibraryOL3374109M
      LC Control Number2004462358
      OCLC/WorldCa54390297

      benthic organisms. In this context, the occurrence of biotic substrates in addition to mineral substrates may change the characteristics of sessile fauna. We tested this hypothesis in different localities of the Weddell Sea (Antarctica), by studying the contribution of ectosymbionts installed on the spines of cidaroids (echinoids).   Responses of benthic community structure to disturbances. Antarctic marine benthic communities are among the most stable ecosystems in the world, and the distribution, composition, and characteristics of marine species reflect their adaptation to .

      Over the past quarter-century, changes in Antarctic sea-ice cover have had profound impacts on life on the ocean floor. As biologists from the Alfred Wegener Institute report in the latest issue of the journal Nature Communications, between and , total benthic biomass on the continental shelf of the northeast Weddell Sea declined by two thirds. [ May ] Over the past quarter-century, changes in Antarctic sea-ice cover have had profound impacts on life on the ocean floor. As biologists from the Alfred Wegener Institute report in the latest issue of the journal Nature Communications, between and , total benthic biomass on the continental shelf of the northeast Weddell Sea declined by two thirds.

      Benthos in the Antarctic Weddell Sea in decline Benthic organisms are reacting to the dynamic sea-ice development. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research. inflow of water from the Weddell Sea surrounding the tip of the Peninsula. Sea ice occurs regularly in winter. The Shelf Water in the Weddell Sea is set apart by the coldest waters, with tempera-tures close to the freezing-point of seawater, and an almost year-round sea-ice cover. The bottom topography of the shelf in the.


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Analysing benthic communities in the Weddell Sea (Antarctica) by NuМЃria TeixidoМЃ Ullod Download PDF EPUB FB2

Get this from a library. Analysing benthic communities in the Weddell Sea (Antarctica): a landscape approach = Analyse der Benthosgemeinschaften im Weddellmeer (Antarktis): ein landschaftsökologischer Ansatz.

[Núria Teixidó Ullod]. Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung, Bremerhaven Analysing benthic communities in the Weddell Sea (Antarctica): a landscape approach Núria Teixidó Ullod Druckfassung einer Dissertation, die dem Fachbereich 2 (Biologie – Chemie) der Universität Bremen vorgelegt wurde.

In this study, I introduce the use of methods borrowed from landscape ecology to analyse quantitatively spatial patterns in Antarctic mega-epibenthic communities.

This discipline focuses on the notion that communities can be observed as a patch mosaic at any scale. From this perspective I investigated spatial patterns based on landscape indices in an undisturbed benthic Cited by: 3. Analysing benthic communities in the Weddell Sea (Antarctica): a landscape approach Article (PDF Available)   January   with  89 Reads  How we measure 'reads' A 'read' is counted each time.

Analysing benthic communities in the Weddell Sea (Antarctica): a landscape approach Núria Teixidó Ullod Druckfassung einer Dissertation, die dem Fachbereich 2 (Biologie – Chemie) der Universität Bremen vorgelegt wurde. Printed version of the Ph. thesis submitted to the Faculty 2 (Biology – Chemistry) of the University of Bremen.

ABSTRACT: Due to extreme pack ice, the Filchner Region in the southern Weddell Sea is one of the least studied regions on the planet. Here, we provide a detailed description of the benthic communities of this high-Antarctic ecosystem, and assess the relationship between environmental factors and benthic distribution patterns.

The present study represents the first quantitative investigation of deep-sea benthic infauna in Antarctica. Box cores and multicores were used to collect sediment from 12 stations across the slope and abyssal basin of the Weddell Sea and the slope off the South Sandwich Islands, including sites in the South Sandwich Trench ( m).

Large Antarctic glass sponges are the main component of benthic communities in the Weddell Sea 1, 2, 3, 5. These organisms enhance biodiversity and provide refuge for other organisms which, in. The present study represents the first quantitative investigation of deep-sea benthic infauna in Antarctica.

Box cores and multicores were used to collect sediment from 12 stations across the slope and abyssal basin of the Weddell Sea and the slope off the South Sandwich Islands, including sites in the South Sandwich Trench ( m).

The paper summarizes data on the life history and population dynamics of benthic invertebrates (am­ phipods, decapod shrimps, molluscs, and echinoderms) from the high Antarctic region of the south-eastern Weddell Sea.

These data were derived from the analysis of material collected during various cruises of R.V. The long-term benthic disturbance experiment (BENDEX) was started on the eastern Weddell Sea shelf off Austasen (Antarctica) during ‘Polarstern’ cruise ANT XXI/2 in December to simulate the impact of grounding icebergs on the seabed and follow the steps and timescales of recovery of disturbed benthos and demersal fish communities.

ABSTRACT: Due to extreme pack-ice the Filchner Region in the southern Weddell Sea is one of the least studied regions on the planet. Here, we report the results on benthic communities of this high-Antarctic ecosystem and assess the relationship between environmental factors and benthic distribution patterns.

the Weddell Sea and the Bellingshausen/Amundsen influence the structure of most benthic communities (Dayton ). Thus, it is likely that the di•erences in Community analysis. Stable isotope (13 C/12 C and 15 N/14 N) analyses were performed on 90 species belonging to different benthic communities sampled in the eastern Weddell Sea.

The study focused on eight amphipod species whose isotopic composition was compared to their previously described respective gut contents. Amphipod stable isotope ratios. During the expedition EASIZ II with RV ‘POLARSTERN’ in a multibox corer yielded quantitative samples from 26 stations between and m water depth for benthic community analysis.

From this material a total of polychaete species out of 37 families was determined. Forty-seven species are new to science.

Analysing benthic communities in the Weddell Sea (Antarctica): a landscape approach = Analyse der Benthosgemeinschaften im Weddellmeer (Antarktis): ein landschaftsökologischer Ansatz By N.

Teixidó Ullod. The influence of the geomorphological and sedimentological settings on the distribution of epibenthic assemblages on a flat topped hill on the over-deepened shelf of the western Weddell Sea (Southern Ocean).

Biogeosciences, Vol. 11, Issue. 14, p. Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link) http://hdl.

This study shows community structure in benthic sediments is correlated to nutrient content and also suggests a possible coupling between pelagic and benthic communities.

We collected 24 benthic samples spanning a km region of Antarctica that includes Western Antarctica (WA) and the Antarctic Peninsula (AP; Figure Figure1). Multiple environmental factors control benthic community patterns, and their relative importance varies with spatial scale.

Since this variation is difficult to evaluate quantitatively, extensive sampling across a broad range of spatial scales is required. PETM at Site (Maud Rise, Weddell Sea; Figure 1). This site contains one of the highest-quality deep-sea records of the PETM event. Upper Paleocene sediments are composed of ooze represent-ing nannofossil zone NP9, planktic foraminiferal zones AP4 and AP5, and part of magnetic polarity zone C24r [Aubry et al., ].Oceanographic and topographic conditions structure benthic meiofauna communities in Weddell Sea, Bransfield Strait and Drake Passage (Antarctic), in: Van de Putte, A.

(Ed.) Book of Abstracts: XIIth SCAR Biology Symposium, Leuven, Belgium, July pp. Dr Michelle Taylor is a deep-sea ecologist whose PhD focused on sub-Antarctic benthic organisms, specifically coral.

She is interested in how populations across the vast deep sea are connected. To investigate this she uses deep-sea robots to collect video and specimens which are used to compare communities of organisms.