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The near-bottom plankton community at the Porcupine Abyssal Plain, NE-Atlantic: Structure and vertical distribution
Christiansen, B.; Bühring, S.I.; Pfannkuche, O.; Weikert, H. (2010). The near-bottom plankton community at the Porcupine Abyssal Plain, NE-Atlantic: Structure and vertical distribution. Mar. Biol. Res. 6(2): 113-124. https://dx.doi.org/10.1080/17451000903150363
In: Marine Biology Research. Taylor & Francis: Oslo; Basingstoke. ISSN 1745-1000; e-ISSN 1745-1019, meer
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    ANE, Porcupine Abyssal Plain
    Aquatic communities
    Topographic features > Submarine features > Abyssal plains
    Vertical distribution
    Water > Deep water
    Zooplankton
    Porcupine Abyssal Plain [Marine Regions]
    Marien/Kust
Author keywords
    Abyssal plain; deep sea; near-bottom; vertical distribution; zooplanktoncommunity
Auteurs  Top 
  • Christiansen, B., meer
  • Bühring, S.I.
  • Pfannkuche, O.
  • Weikert, H.
Abstract
    The study presents results on the composition and vertical distribution of the near-bottom plankton community at an abyssal site in the NE Atlantic. Plankton samples were collected at 1, 15, 50 and 100 m above bottom (mab). Whereas the composition within the upper three layers was very similar, a major shift occurred in the immediate vicinity of the seafloor. Between 100 and 15 mab, the plankton was dominated by Copepoda, making up more than 75% of the total abundance and biomass (without gelatinous organisms). At 1 mab, Copepoda were still abundant, but their share decreased to ca. 50%, while Polychaeta, Malacostraca and Chaetognatha became important groups. Within the Copepoda, the predominance of the genus Metridia (Calanoida) in the upper layers was replaced by the genus Benthomisophria (Misophrioida) at 1 mab. Despite enrichment in organic particles towards the bottom, the total abundance and biomass of plankton did not show marked differences between the four layers investigated. Several hypotheses are discussed which may explain why the presumably higher food concentrations near the deep-sea floor do not lead to increased standing stocks of the plankton community.
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