Seasonal changes in mesozooplankton swimmers collected by sediment trap moored at a single station on the Northwind Abyssal Plain in the western Arctic Ocean

Matsuno, Kohei; Yamaguchi, Atsushi; Fujiwara, Amane; Onodera, Jonaotaro; Watanabe, Eiji; Imai, Ichiro; Chiba, Sanae; Harada, Naomi; Kikuchi, Takashi

doi:10.1093/plankt/fbt092

Cited by 35 publications

(44 citation statements)

References 62 publications

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“…Swimmers can artificially increase POC fluxes by entering the cups and releasing particulate organic matter or decrease the flux by feeding in the trap funnel (Buesseler et al, 2007a). Some studies have focused specifically on swimmer communities collected in shallow sediment traps (Matsuno et al, 2014, and references therein), although trap collection of swimmers is probably selective and therefore not quantitative. Total swimmer intrusion rate was highest in cups #6 to #9 (December 2011 to February 2012) generally through the representation of copepods and amphipods ( Table 2).…”

Section: Swimmers and Particle Solubilizationmentioning

confidence: 99%

Export fluxes in a naturally iron-fertilized area of the Southern Ocean – Part 1: Seasonal dynamics of particulate organic carbon export from a moored sediment trap

et al. 2015

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Abstract.A sediment trap moored in the naturally ironfertilized Kerguelen Plateau in the Southern Ocean provided an annual record of particulate organic carbon and nitrogen fluxes at 289 m. At the trap deployment depth, current speeds were typically low ( ∼ 10 cm s −1 ) and primarily tidaldriven (M2 tidal component). Although advection was weak, the sediment trap may have been subject to hydrodynamical and biological (swimmer feeding on trap funnel) biases. Particulate organic carbon (POC) flux was generally low (< 0.5 mmol m −2 d −1 ), although two episodic export events (< 14 days) of 1.5 mmol m −2 d −1 were recorded. These increases in flux occurred with a 1-month time lag from peaks in surface chlorophyll and together accounted for approximately 40 % of the annual flux budget. The annual POC flux of 98.2 ± 4.4 mmol m −2 yr −1 was low considering the shallow deployment depth but comparable to independent estimates made at similar depths (∼ 300 m) over the plateau, and to deep-ocean (> 2 km) fluxes measured from similarly productive iron-fertilized blooms. Although undertrapping cannot be excluded in shallow moored sediment trap deployment, we hypothesize that grazing pressure, including mesozooplankton and mesopelagic fishes, may be responsible for the low POC flux beneath the base of the winter mixed layer. The importance of plankton community structure in controlling the temporal variability of export fluxes is addressed in a companion paper.

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Section: Swimmers and Particle Solubilizationmentioning

confidence: 99%

Export fluxes in a naturally iron-fertilized area of the Southern Ocean – Part 1: Seasonal dynamics of particulate organic carbon export from a moored sediment trap

et al. 2015

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“…The bivalve larvae originate mainly from the Bering Strait to the east of the Chukchi shelf, but they rarely appear in the Canada Basin (K. Kimoto, JAMSTEC, unpublished data). The fluxes of zooplankton swimmers ranged from 5 to 44 individuals m −2 day −1 ; these fluxes were greatest in July-October and they were not as high in November-December (Matsuno et al, 2013). The zooplankton swimmers were dominantly copepods, which accounted for 18-94% of swimmer fluxes (Matsuno et al, 2013).…”

Section: Biological Pumpmentioning

confidence: 98%

“…The fluxes of zooplankton swimmers ranged from 5 to 44 individuals m −2 day −1 ; these fluxes were greatest in July-October and they were not as high in November-December (Matsuno et al, 2013). The zooplankton swimmers were dominantly copepods, which accounted for 18-94% of swimmer fluxes (Matsuno et al, 2013). The copepod assemblage changed dramatically in February-April, when C. hyperboreus increased drastically (Matsuno et al, 2013).…”

Section: Biological Pumpmentioning

confidence: 99%

“…The zooplankton swimmers were dominantly copepods, which accounted for 18-94% of swimmer fluxes (Matsuno et al, 2013). The copepod assemblage changed dramatically in February-April, when C. hyperboreus increased drastically (Matsuno et al, 2013). It seems likely that seasonal changes in vertical migration related to changes in the day-night cycle in February-April led to this increase in the C. hyperboreus flux (Matsuno et al, 2013).…”

Section: Biological Pumpmentioning

confidence: 99%

“…The copepod assemblage changed dramatically in February-April, when C. hyperboreus increased drastically (Matsuno et al, 2013). It seems likely that seasonal changes in vertical migration related to changes in the day-night cycle in February-April led to this increase in the C. hyperboreus flux (Matsuno et al, 2013). Although seasonal changes in the copepod assemblage are thought to be affected by changes in the sea-ice concentration, temperature, and salinity (Makabe et al, 2010), an internal body timer may also be an important factor in the timing of their seasonal upward migration ) that leads to an increase of C. hyperboreus production during winter.…”

Section: Biological Pumpmentioning

confidence: 99%

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Review: Potential catastrophic reduction of sea ice in the western Arctic Ocean: Its impact on biogeochemical cycles and marine ecosystems

Harada

2016

Global and Planetary Change

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a b s t r a c tThe reduction of sea ice in the Arctic Ocean, which has progressed more rapidly than previously predicted, has the potential to cause multiple environmental stresses, including warming, acidification, and strengthened stratification of the ocean. Observational studies have been undertaken to detect the impacts on biogeochemical cycles and marine ecosystems of these environmental stresses in the Arctic Ocean. Satellite analyses show that the reduction of sea ice has been especially great in the western Arctic Ocean. Observations and model simulations have both helped to clarify the impact of sea-ice reductions on the dynamics of ecosystem processes and biogeochemical cycles. In this review, I focus on the western Arctic Ocean, which has experienced the most rapid retreat of sea ice in the Arctic Ocean and, very importantly, has a higher rate of primary production than any other area of the Arctic Ocean owing to the supply of nutrient-rich Pacific water. I report the impact of the current reduction of sea ice on marine biogeochemical cycles in the western Arctic Ocean, including lower-trophic-level organisms, and identify the key mechanism of changes in the biogeochemical cycles, based on published observations and model simulations. The retreat of sea ice has enhanced primary production and has increased the frequency of appearance of mesoscale anticyclonic eddies. These eddies enhance the light environment and replenish nutrients, and they also represent a mechanism that can increase the rate of the biological pump in the Arctic Ocean. Various unresolved issues that require further investigation, such as biological responses to environmental stressors such as ocean acidification, are also discussed.

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Environmental niche overlap in sibling planktonic species Calanus finmarchicus and C. glacialis in Arctic fjords

Weydmann‐Zwolicka

Cottier

Berge

et al. 2022

Ecology and Evolution

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Knowledge of environmental preferences of the key planktonic species, such as Calanus copepods in the Arctic, is crucial to understand ecosystem function and its future under climate change. Here, we assessed the environmental conditions influencing the development stages of Atlantic Calanus finmarchicus and Arctic Calanus glacialis , and we quantified the extent to which their niches overlap by incorporating multiple environmental data. We based our analysis on a 3‐year seasonal collection of zooplankton by sediment traps, located on moorings in two contrasting Svalbard fjords: the Arctic Rijpfjorden and the Atlantic‐influenced Kongsfjorden. Despite large differences in water temperature between the fjords, local realized ecological niches of the sibling Calanus species overlapped almost perfectly. The exception was the earliest copepodites of C. glacialis in Rijpfjorden, which probably utilized the local ice algal bloom in spring. However, during periods with no sea ice, like in Kongsfjorden, the siblings of both Calanus species showed high synchronization in the population structure. Interestingly, differences in temperature preferences of C. finmarchicus and C. glacialis were much higher between the studied fjords than between the species. Our analysis confirmed the high plasticity of Calanus copepods and their abilities to adapt to highly variable environmental settings, not only on an interannual basis but also in a climate warming context, indicating some resilience in the Calanus community.

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Seasonal changes in mesozooplankton swimmers collected by sediment trap moored at a single station on the Northwind Abyssal Plain in the western Arctic Ocean

Cited by 35 publications

References 62 publications

Export fluxes in a naturally iron-fertilized area of the Southern Ocean – Part 1: Seasonal dynamics of particulate organic carbon export from a moored sediment trap

Export fluxes in a naturally iron-fertilized area of the Southern Ocean – Part 1: Seasonal dynamics of particulate organic carbon export from a moored sediment trap

Review: Potential catastrophic reduction of sea ice in the western Arctic Ocean: Its impact on biogeochemical cycles and marine ecosystems

Environmental niche overlap in sibling planktonic species Calanus finmarchicus and C. glacialis in Arctic fjords

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