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Chemical and biolog...
Chemical and biological vertical distributions within central Arctic (>82 degrees N) sea ice during late summer
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- Torstensson, Anders (författare)
- Uppsala universitet,Limnologi,Univ Washington, Sch Oceanog, Seattle, WA 98195 USA.;Swedish Meteorol & Hydrol Inst, S-42671 Vastra Frolunda, Sweden.
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- Showalter, G. M. (författare)
- Univ Washington, Sch Oceanog, Seattle, WA 98195 USA.
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- Margolin, A. R. (författare)
- Virginia Inst Marine Sci, Coll William & Mary, Gloucester Point, VA 23602 USA.
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- Shadwick, E. H. (författare)
- Virginia Inst Marine Sci, Coll William & Mary, Gloucester Point, VA 23602 USA.;CSIRO Oceans & Atmosphere, Hobart, Tas 7001, Australia.
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- Deming, J. W. (författare)
- Univ Washington, Sch Oceanog, Seattle, WA 98195 USA.
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- Smith, W. O., Jr. (författare)
- Virginia Inst Marine Sci, Coll William & Mary, Gloucester Point, VA 23602 USA.;Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai 200240, Peoples R China.
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(creator_code:org_t)
- Inter-Research Science Publisher, 2023
- 2023
- Engelska.
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Ingår i: Marine Ecology Progress Series. - : Inter-Research Science Publisher. - 0171-8630 .- 1616-1599. ; 703, s. 17-30
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- We assessed the distribution of biota (autotrophs and heterotrophs) and associated carbonate chemistry variables in Arctic sea ice at latitudes >82 degrees N during late summer and early autumn 2018. The sampled sea ice was relatively thick (average 1.4 m) with variable snow cover (mean 7 cm) and low bulk salinities throughout. Most measured variables, including carbonate chemistry parameters, were low in the upper half of the ice cores, but increased with depth. Measurements of particulate organic carbon (POC), chlorophyll a (chl a), bacterial abundance, and particulate extracellular polysaccharide (pEPS) in the cores strongly suggested that detrital carbon was the major particulate organic pool. Near the ice-water interface, autotrophic material comprised ca. 50% of the total POC, whereas pEPS and bacterial carbon accounted for ca. 8 and 1% of the total POC, respectively. Under-ice water was nutrient poor, providing only a small input of nutrients to support autotrophic growth, at least during the time of our sampling. While the Arctic Ocean has substantial interannual variability in sea-ice concentration and thickness, these measurements enrich the available database and suggest that during years when autumn sea ice is >1 m thick, sea-ice biota are limited in activity and biomass.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
Nyckelord
- Algae
- Bacteria
- Sea ice microbial community
- Carbon
- Biomass
- EPS
- DIC
- pH
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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