Horizontal and vertical dynamics of zooplankton and fish larvae communities during mid-summer in the arctic Disko Bay, West Greenland

Torkel Gissel Nielsen, Peter Munk, Benni Winding Hansen

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Disko Bay is a highly productive inlet at the border between high- and low-arctic sectors of west Greenland. The physical/chemical conditions in the bay have changed during recent decades, specifically during an inflow event in 1996–1997 that led to increased deep-water temperatures. To further understand the consequences of physical changes to the plankton community in the bay, we examine findings from a field study on mesozooplankton and fish larvae in the areas of Disko Bay and Disko Bank carried out in 1997. We sampled 31 stations over 5 days along four transects and assessed horizontal and vertical distribution patterns, community composition and plankton trophodynamics. Plankton abundance was enhanced near-coast and across the pycnocline, and communities differed between regions. Polar cod (Boreogadus saida) and the sandeel (Ammodytes sp.) were among the abundant fish larvae. Productivity/growth estimates of key species of copepods and fish larvae showed no apparent relationship to food availability; they reached weight specific values of ∼6% day−1 for copepods and ∼14% day−1 for fish larvae. Overall, we found a rich and dynamic plankton community, strongly influenced by the complex hydrography of the area. Thus, changes in physical characteristics of the bay could threaten the resilience of its ecosystem
OriginalsprogEngelsk
TidsskriftJournal of Plankton Research
Vol/bind37
Udgave nummer3
Sider (fra-til)554-570
ISSN0142-7873
DOI
StatusUdgivet - 2015

Citer dette

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title = "Horizontal and vertical dynamics of zooplankton and fish larvae communities during mid-summer in the arctic Disko Bay, West Greenland",
abstract = "Disko Bay is a highly productive inlet at the border between high- and low-arctic sectors of west Greenland. The physical/chemical conditions in the bay have changed during recent decades, specifically during an inflow event in 1996–1997 that led to increased deep-water temperatures. To further understand the consequences of physical changes to the plankton community in the bay, we examine findings from a field study on mesozooplankton and fish larvae in the areas of Disko Bay and Disko Bank carried out in 1997. We sampled 31 stations over 5 days along four transects and assessed horizontal and vertical distribution patterns, community composition and plankton trophodynamics. Plankton abundance was enhanced near-coast and across the pycnocline, and communities differed between regions. Polar cod (Boreogadus saida) and the sandeel (Ammodytes sp.) were among the abundant fish larvae. Productivity/growth estimates of key species of copepods and fish larvae showed no apparent relationship to food availability; they reached weight specific values of ∼6{\%} day−1 for copepods and ∼14{\%} day−1 for fish larvae. Overall, we found a rich and dynamic plankton community, strongly influenced by the complex hydrography of the area. Thus, changes in physical characteristics of the bay could threaten the resilience of its ecosystem",
author = "Nielsen, {Torkel Gissel} and Peter Munk and Hansen, {Benni Winding}",
year = "2015",
doi = "10.1093/plankt/fbv034",
language = "English",
volume = "37",
pages = "554--570",
journal = "Journal of Plankton Research",
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Horizontal and vertical dynamics of zooplankton and fish larvae communities during mid-summer in the arctic Disko Bay, West Greenland. / Nielsen, Torkel Gissel; Munk, Peter; Hansen, Benni Winding.

I: Journal of Plankton Research, Bind 37, Nr. 3, 2015, s. 554-570.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Horizontal and vertical dynamics of zooplankton and fish larvae communities during mid-summer in the arctic Disko Bay, West Greenland

AU - Nielsen, Torkel Gissel

AU - Munk, Peter

AU - Hansen, Benni Winding

PY - 2015

Y1 - 2015

N2 - Disko Bay is a highly productive inlet at the border between high- and low-arctic sectors of west Greenland. The physical/chemical conditions in the bay have changed during recent decades, specifically during an inflow event in 1996–1997 that led to increased deep-water temperatures. To further understand the consequences of physical changes to the plankton community in the bay, we examine findings from a field study on mesozooplankton and fish larvae in the areas of Disko Bay and Disko Bank carried out in 1997. We sampled 31 stations over 5 days along four transects and assessed horizontal and vertical distribution patterns, community composition and plankton trophodynamics. Plankton abundance was enhanced near-coast and across the pycnocline, and communities differed between regions. Polar cod (Boreogadus saida) and the sandeel (Ammodytes sp.) were among the abundant fish larvae. Productivity/growth estimates of key species of copepods and fish larvae showed no apparent relationship to food availability; they reached weight specific values of ∼6% day−1 for copepods and ∼14% day−1 for fish larvae. Overall, we found a rich and dynamic plankton community, strongly influenced by the complex hydrography of the area. Thus, changes in physical characteristics of the bay could threaten the resilience of its ecosystem

AB - Disko Bay is a highly productive inlet at the border between high- and low-arctic sectors of west Greenland. The physical/chemical conditions in the bay have changed during recent decades, specifically during an inflow event in 1996–1997 that led to increased deep-water temperatures. To further understand the consequences of physical changes to the plankton community in the bay, we examine findings from a field study on mesozooplankton and fish larvae in the areas of Disko Bay and Disko Bank carried out in 1997. We sampled 31 stations over 5 days along four transects and assessed horizontal and vertical distribution patterns, community composition and plankton trophodynamics. Plankton abundance was enhanced near-coast and across the pycnocline, and communities differed between regions. Polar cod (Boreogadus saida) and the sandeel (Ammodytes sp.) were among the abundant fish larvae. Productivity/growth estimates of key species of copepods and fish larvae showed no apparent relationship to food availability; they reached weight specific values of ∼6% day−1 for copepods and ∼14% day−1 for fish larvae. Overall, we found a rich and dynamic plankton community, strongly influenced by the complex hydrography of the area. Thus, changes in physical characteristics of the bay could threaten the resilience of its ecosystem

U2 - 10.1093/plankt/fbv034

DO - 10.1093/plankt/fbv034

M3 - Journal article

VL - 37

SP - 554

EP - 570

JO - Journal of Plankton Research

JF - Journal of Plankton Research

SN - 0142-7873

IS - 3

ER -