Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord

doi:10.1016/j.pocean.2017.07.005

	Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord
	Calleja, Maria Ll.1,2; Kerherve, P.3; Bourgeois, S.4,5; Kedra, M.6; Leynaert, A.4; Devred, E.7; Babin, M.8,9; Morata, N.4
刊名	PROGRESS IN OCEANOGRAPHY
	2017-12
卷号	159 页码:195-210
关键词	Arctic Fjords Glaciers Organic matter Diatom bloom Carbon and nitrogen stable isotopes
ISSN号	0079-6611
DOI	10.1016/j.pocean.2017.07.005
英文摘要	Arctic fjords experience extremely pronounced seasonal variability and spatial heterogeneity associated with changes in ice cover, glacial retreat and the intrusion of continental shelf s adjacent water masses. Global warming intensifies natural environmental variability on these important systems, yet the regional and global effects of these processes are still poorly understood. In the present study, we examine seasonal and spatial variability in Kongsfjorden, on the western coast of Spitsbergen, Svalbard. We report hydrological, biological, and biogeochemical data collected during spring, summer, and fall 2012. Our results show a strong phytoplankton bloom with the highest chlorophyll a (Chla) levels ever reported in this area, peaking 15.5 mu g/L during late May and completely dominated by large diatoms at the inner fjord, that may sustain both pelagic and benthic production under weakly stratified conditions at the glacier front. A progressively stronger stratification of the water column during summer and fall was shaped by the intrusion of warm Atlantic water (T >3 degrees C and Sal > 34.65) into the fiord at around 100 m depth, and by turbid freshwater plumes (T < 1 degrees C and Sal < 34.65) at the surface due to glacier meltwater input. Biopolymeric carbon fractions and isotopic signatures of the particulate organic material (POM) revealed very fresh and labile material produced during the spring bloom (C-13 enriched, with values up to -22.7 parts per thousand at the highest Chi a peak, and high in carbohydrates and proteins content-up to 167 and 148 mu g/L, respectively-), and a clear and strong continental signature of the POM present during late summer and fall (C-13 depleted, with values averaging -26.5 parts per thousand, and high in lipid content-up to 92 mu g/L-) when freshwater melting is accentuated. Our data evidence the importance of combining both physical (i.e. water mass dominance) and geochemical (i.e. characteristics of material released by glacier runoff) data in order to understand the timing, intensity and characteristics of the phytoplankton bloom in Kongsfjorden, a continuously changing system due to sustained warming. In a scenario where glacial retreat is predicted to increase the impacts of meltwater discharge and associated delivery of organic and inorganic material to the surrounding waters, special attention is required in order to predict the consequences for Arctic fjords and adjacent shelf ecosystems.
资助项目	Polish Ministry of Science and Higher Education[W70/ECOTAB/2014]
WOS关键词	PARTICULATE ORGANIC-MATTER ; WEST SPITSBERGEN CURRENT ; SPRING BLOOM ; SEA-ICE ; ISOTOPIC COMPOSITION ; STABLE-ISOTOPES ; COASTAL WATERS ; TRACE-ELEMENTS ; KONGSFJORDEN ; MARINE
WOS研究方向	Oceanography
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000418980600012
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25320]
专题	自然资源部第一海洋研究所
通讯作者	Calleja, Maria Ll.
作者单位	1.CSIC UGR, IACT, Ave Las Palmeras 4, Granada 18100, Spain 2.KAUST, Div Biol & Environm Sci & Engn BESE, RSRC, Thuwal 239556900, Saudi Arabia 3.Univ Perpignan, UMR5110, Ctr Format & Rech Environm Mediterraneens CEFREM, Via Domitia, F-66860 Perpignan, France 4.Univ Bretagne Occidentale, UMR 6539, Lab Sci Environm MARin LEMAR, Rue Dumont DUrville, F-29280 Plouzane, France 5.Univ Aberdeen, Sch Biol Sci, Oceanlab, Aberdeen AB41 6AA, Scotland 6.Polish Acad Sci, Inst Oceanol, Powstancow Warszawy 55, PL-81712 Sopot, Poland 7.Fisheries & Oceans Canada, Ocean & Ecosyst Sci Div, Bedford Inst Oceanog, 1 Challenger Dr, Dartmouth, NS B2Y 4A2, Canada 8.Univ Laval, Joint Int Lab, Takuvik, Pavillon Alexandre Vachon 1045,Ave Med, Quebec City, PQ G1V 0A6, Canada 9.CNRS, Dept Biol, Pavillon Alexandre Vachon 1045,Ave Med, Quebec City, PQ G1V 0A6, Canada
推荐引用方式 GB/T 7714	Calleja, Maria Ll.,Kerherve, P.,Bourgeois, S.,et al. Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord[J]. PROGRESS IN OCEANOGRAPHY,2017,159:195-210.
APA	Calleja, Maria Ll..,Kerherve, P..,Bourgeois, S..,Kedra, M..,Leynaert, A..,...&Morata, N..(2017).Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord.PROGRESS IN OCEANOGRAPHY,159,195-210.
MLA	Calleja, Maria Ll.,et al."Effects of increase glacier discharge on phytoplankton bloom dynamics and pelagic geochemistry in a high Arctic fjord".PROGRESS IN OCEANOGRAPHY 159(2017):195-210.