GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • AWI_BPP; Bentho-Pelagic Processes @ AWI; DATE/TIME; DEPTH, water; File name; File size; Kongsfjorden, Spitsbergen, Arctic; Latitude of event; Longitude of event; M1; M1_NearBlomstrand; M2; M2_NearKongsbreen; M3; M3_Kongsfjordneset; M4; M4_CrossNyAlesund; M5; M5_Juttaholmen; M6; M6_Midtholmen; MOKI; Moored onsight keyspecies investigation; Moored onsight keyspecies investigation (MOKI); Optional event label; Uniform resource locator/link to image  (1)
Document type
Keywords
Publisher
Years
  • 1
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Hirche, Hans-Juergen; Laudien, Jürgen; Buchholz, Friedrich (2015): Near-bottom zooplankton aggregations in Kongsfjorden: implications for pelago-benthic coupling. Polar Biology, https://doi.org/10.1007/s00300-015-1799-4
    Publication Date: 2024-03-01
    Description: Near-bottom zooplankton communities have rarely been studied despite numerous reports of high zooplankton concentrations, probably due to methodological constraints. In Kongsfjorden, Svalbard, the near-bottom layer was studied for the first time by combining daytime deployments of a remotely operated vehicle (ROV), the optical zooplankton sensor moored on-sight key species investigation (MOKI), and Tucker trawl sampling. ROV data from the fjord entrance and the inner fjord showed high near-bottom abundances of euphausiids with a mean concentration of 17.3 ± 3.5 n/100 m**3. With the MOKI system, we observed varying numbers of euphausiids, amphipods, chaetognaths, and copepods on the seafloor at six stations. Light-induced zooplankton swarms reached densities in the order of 90,000 (euphausiids), 120,000 (amphipods), and 470,000 ind/m**3 (chaetognaths), whereas older copepodids of Calanus hyperboreus and C. glacialis did not respond to light. They were abundant at the seafloor and 5 m above and showed maximum abundance of 65,000 ind/m**3. Tucker trawl data provided an overview of the seasonal vertical distribution of euphausiids. The most abundant species Thysanoessa inermis reached near-bottom concentrations of 270 ind/m**3. Regional distribution was neither related to depth nor to location in the fjord. The taxa observed were all part of the pelagic community. Our observations suggest the presence of near-bottom macrozooplankton also in other regions and challenge the current view of bentho-pelagic coupling. Neglecting this community may cause severe underestimates of the stock of elagic zooplankton, especially predatory species, which link secondary production with higher trophic levels.
    Keywords: AWI_BPP; Bentho-Pelagic Processes @ AWI; DATE/TIME; DEPTH, water; File name; File size; Kongsfjorden, Spitsbergen, Arctic; Latitude of event; Longitude of event; M1; M1_NearBlomstrand; M2; M2_NearKongsbreen; M3; M3_Kongsfjordneset; M4; M4_CrossNyAlesund; M5; M5_Juttaholmen; M6; M6_Midtholmen; MOKI; Moored onsight keyspecies investigation; Moored onsight keyspecies investigation (MOKI); Optional event label; Uniform resource locator/link to image
    Type: Dataset
    Format: text/tab-separated-values, 666 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...