Sea-ice algal primary production and nitrogen uptake rates off East Antarctica

被引：17

作者：

Roukaerts, Arnout ^{[1
]}

Cavagna, Anne-Julie ^{[1
]}

Fripiat, Francois ^{[1
]}

Lannuzel, Delphine ^{[2
,4
]}

Meiners, Klaus M. ^{[3
,4
]}

Dehairs, Frank ^{[1
]}

机构：

[1] Vrije Univ Brussel, Analyt Environm & Geochem & Earth Syst Sci, Brussels, Belgium

[2] Univ Tasmania, Inst Marine & Antarctic Studies, Locked Bag 129, Hobart, Tas 7001, Australia

[3] Australian Antarctic Div, Dept Environm, 203 Channel Highway, Kingston, Tas 7050, Australia

[4] Univ Tasmania, Antarctic Climate & Ecosyst Cooperat Res Ctr, Private Bag 80, Hobart, Tas 7001, Australia

来源：

DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY | 2016年 / 131卷

关键词：

Primary production; Ice algae nitrogen uptake; Stable isotope dilution; Pack ice; Pacific sector; WINTER-SPRING TRANSITION; TERRA-NOVA BAY; ROSS SEA; PACK-ICE; MICROBIAL COMMUNITIES; MACKENZIE SHELF; HIGH-RESOLUTION; SOUTHERN-OCEAN; MCMURDO SOUND; WEDDELL SEA;

D O I：

10.1016/j.dsr2.2015.08.007

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

Antarctic pack ice comprises about 90% of the sea ice in the southern hemisphere and plays an important structuring role in Antarctic marine ecosystems, yet measurements of ice algal primary production and nitrogen uptake rates remain scarce. During the early austral spring of 2012, measurements for primary production rates and uptake of two nitrogen substrates (nitrate and ammonium) were conducted at 5 stations in the East Antarctic pack ice (63-66 degrees S, 115-125 degrees E). Carbon uptake was low (3.52 mg C m(-2) d(-1)) but a trend of increased production was observed towards the end of the voyage suggesting pre-bloom conditions. Significant snow covers reaching, up to 0.8 m, induced strong light limitation. Two different regimes were observed in the ice with primarily nitrate based 'new' production (f-ratio: 0.80-0.95) at the bottom of the ice cover, due to nutrient-replete conditions at the ice-water interface, and common for pre-bloom conditions. In the sea-ice interior, POC:PN ratios (20-70) and higher POC:Chl a ratios suggested the presence of large amounts of detrital material trapped in the ice and here ammonium was the prevailing nitrogen substrate. This suggests that most primary production in the sea-ice interior was regenerated and supported by a microbial food web, recycling detritus. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：140 / 149

页数：10

共 78 条

[11]

Comiso J.C., 2010, Sea Ice, P205, DOI [10.1002/9781444317145.ch6, DOI 10.1002/9781444317145.CH6]

[12] Climate change and Southern Ocean ecosystems I: how changes in physical habitats directly affect marine biota [J].

Constable, Andrew J. ;

Melbourne-Thomas, Jessica ;

Corney, Stuart P. ;

Arrigo, Kevin R. ;

Barbraud, Christophe ;

Barnes, David K. A. ;

Bindoff, Nathaniel L. ;

Boyd, Philip W. ;

Brandt, Angelika ;

Costa, Daniel P. ;

Davidson, Andrew T. ;

Ducklow, Hugh W. ;

Emmerson, Louise ;

Fukuchi, Mitsuo ;

Gutt, Julian ;

Hindell, Mark A. ;

Hofmann, Eileen E. ;

Hosie, Graham W. ;

Iida, Takahiro ;

Jacob, Sarah ;

Johnston, Nadine M. ;

Kawaguchi, So ;

Kokubun, Nobuo ;

Koubbi, Philippe ;

Lea, Mary-Anne ;

Makhado, Azwianewi ;

Massom, Rob A. ;

Meiners, Klaus ;

Meredith, Michael P. ;

Murphy, Eugene J. ;

Nicol, Stephen ;

Reid, Keith ;

Richerson, Kate ;

Riddle, Martin J. ;

Rintoul, Stephen R. ;

Smith, Walker O., Jr. ;

Southwell, Colin ;

Stark, Jonathon S. ;

Sumner, Michael ;

Swadling, Kerrie M. ;

Takahashi, Kunio T. ;

Trathan, Phil N. ;

Welsford, Dirk C. ;

Weimerskirch, Henri ;

Westwood, Karen J. ;

Wienecke, Barbara C. ;

Wolf-Gladrow, Dieter ;

Wright, Simon W. ;

Xavier, Jose C. ;

Ziegler, Philippe .

GLOBAL CHANGE BIOLOGY, 2014, 20 (10) :3004-3025

[13] MARINE DIATOMS GROWN IN CHEMOSTATS UNDER SILICATE OR AMMONIUM LIMITATION .2. TRANSIENT-RESPONSE OF SKELETONEMA-COSTATUM TO A SINGLE ADDITION OF LIMITING NUTRIENT [J].

CONWAY, HL ;

HARRISON, PJ ;

DAVIS, CO .

MARINE BIOLOGY, 1976, 35 (02) :187-199

[14] High-resolution trends of nutrients, DOM and nitrogen uptake in the annual sea ice at Terra Nova Bay, Ross Sea [J].

Cozzi, Stefano .

ANTARCTIC SCIENCE, 2008, 20 (05) :441-454

[15]

De La Rocha C.L., 2013, THE BIOL PUMP

[16] UPTAKE OF NEW AND REGENERATED FORMS OF NITROGEN IN PRIMARY PRODUCTIVITY [J].

DUGDALE, RC ;

GOERING, JJ .

LIMNOLOGY AND OCEANOGRAPHY, 1967, 12 (02) :196-&

[17] Reliability of N flux rates estimated from 15N enrichment and dilution experiments in aquatic systems -: art. no. GB4028 [J].

Elskens, M ;

Baeyens, W ;

Brion, N ;

De Galan, S ;

Goeyens, L ;

de Brauwere, A .

GLOBAL BIOGEOCHEMICAL CYCLES, 2005, 19 (04)

[18] Impact of climate change on Antarctic krill [J].

Flores, H. ;

Atkinson, A. ;

Kawaguchi, S. ;

Krafft, B. A. ;

Milinevsky, G. ;

Nicol, S. ;

Reiss, C. ;

Tarling, G. A. ;

Werner, R. ;

Rebolledo, E. Bravo ;

Cirelli, V. ;

Cuzin-Roudy, J. ;

Fielding, S. ;

Groeneveld, J. J. ;

Haraldsson, M. ;

Lombana, A. ;

Marschoff, E. ;

Meyer, B. ;

Pakhomov, E. A. ;

Rombola, E. ;

Schmidt, K. ;

Siegel, V. ;

Teschke, M. ;

Tonkes, H. ;

Toullec, J. Y. ;

Trathan, P. N. ;

Tremblay, N. ;

Van de Putte, A. P. ;

van Franeker, J. A. ;

Werner, T. .

MARINE ECOLOGY PROGRESS SERIES, 2012, 458 :1-19

[19] New insights into sea ice nitrogen biogeochemical dynamics from the nitrogen isotopes [J].

Fripiat, F. ;

Sigman, D. M. ;

Fawcett, S. E. ;

Rafter, P. A. ;

Weigand, M. A. ;

Tison, J. -L. .

GLOBAL BIOGEOCHEMICAL CYCLES, 2014, 28 (02) :115-130

[20] High turnover rates indicated by changes in the fixed N forms and their stable isotopes in Antarctic landfast sea ice [J].

Fripiat, Francois ;

Sigman, Daniel M. ;

Masse, Guillaume ;

Tison, Jean-Louis .

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2015, 120 (04) :3079-3097

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