FN Archimer Export Format
PT J
TI Isoscape Models of the Southern Ocean: Predicting Spatial and Temporal Variability in Carbon and Nitrogen Isotope Compositions of Particulate Organic Matter
BT 
AF St John Glew, Katie
   Espinasse, Boris
   Hunt, Brian P. V.
   Pakhomov, Evgeny A.
   Bury, Sarah J.
   Pinkerton, Matt
   Nodder, Scott D.
   Gutiérrez‐Rodríguez, Andres
   Safi, Karl
   Brown, Julie C. S.
   Graham, Laura
   Dunbar, Robert B.
   Mucciarone, David A.
   Magozzi, Sarah
   Somes, Chris
   Trueman, Clive N.
AS 1:1;2:2;3:3,4,5;4:3,4,5;5:6;6:6;7:6;8:6;9:7;10:6;11:8,9;12:10;13:10;14:11;15:12;16:1,13;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:;16:;
C1 School of Ocean and Earth Science,University of Southampton National Oceanography Centre Southampton Southampton, UK
   Department of Arctic and Marine Biology ,UiT The Arctic University of Norway Tromsø ,Norway
   Institute for the Oceans and Fisheries, University of British Columbia Vancouver BC ,Canada
   Department of Earth, Ocean and Atmospheric Sciences University of British Columbia Vancouver BC ,Canada
   Hakai Institute Tula Foundation Heriot Bay BC, Canada
   National Institute of Water & Atmospheric Research Ltd (NIWA) ,Wellington, New Zealand
   National Institute of Water & Atmospheric Research Ltd (NIWA),Hamilton ,New Zealand
   Geography, Earth and Environmental Sciences University of Birmingham Birmingham, UK
   Biodiversity, Ecology and Conservation Group International Institute for Applied Systems Analysis Laxenburg ,Austria
   Earth System Science ,Stanford University Stanford CA, USA
   Department of Integrative Marine Ecology ,Stazione Zoologica Anton Dohrn Fano Marine Centre Fano ,Italy
   Marine Biogeochemical Modelling, GEOMAR Helmholtz Centre for Ocean Research Kiel Kiel, Germany
   Hong Kong Branch of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) Hong Kong ,China
C2 UNIV SOUTHAMPTON, UK
   UNIV ARCTIC UIT NORWAY, NORWAY
   MPO, CANADA
   UNIV BRITISH COLUMBIA, CANADA
   HAKAI INST, CANADA
   NIWA, NEW ZEALAND
   NIWA, NEW ZEALAND
   UNIV BIRMINGHAM, UK
   IIASA, AUSTRIA
   UNIV STANFORD, USA
   STAZ ZOOL ANTON DOHRN, ITALY
   IFM GEOMAR, GERMANY
   UNIV HONG KONG, CHINA
IF 6.5
TC 18
UR https://archimer.ifremer.fr/doc/00722/83389/88362.pdf
LA English
DT Article
CR MOBYDICK-THEMISTO
BO Marion Dufresne
DE ;stable isotopes;delta C-13 and delta N-15;POM;Bayesian spatial modeling;migration pathways;trophic baseline
AB Polar marine ecosystems are particularly vulnerable to the effects of climate change. Warming temperatures, freshening seawater, and disruption to sea-ice formation potentially all have cascading effects on food webs. New approaches are needed to better understand spatiotemporal interactions among biogeochemical processes at the base of Southern Ocean food webs. In marine systems, isoscapes (models of the spatial variation in the stable isotopic composition) of carbon and nitrogen have proven useful in identifying spatial variation in a range of biogeochemical processes, such as nutrient utilization by phytoplankton. Isoscapes provide a baseline for interpreting stable isotope compositions of higher trophic level animals in movement, migration, and diet research. Here, we produce carbon and nitrogen isoscapes across the entire Southern Ocean (>40°S) using surface particulate organic matter isotope data, collected over the past 50 years. We use Integrated Nested Laplace Approximation-based approaches to predict mean annual isoscapes and four seasonal isoscapes using a suite of environmental data as predictor variables. Clear spatial gradients in δ13C and δ15N values were predicted across the Southern Ocean, consistent with previous statistical and mechanistic views of isotopic variability in this region. We identify strong seasonal variability in both carbon and nitrogen isoscapes, with key implications for the use of static or annual average isoscape baselines in animal studies attempting to document seasonal migratory or foraging behaviors. 
PY 2021
PD SEP
SO Global Biogeochemical Cycles
SN 0886-6236
PU American Geophysical Union (AGU)
VL 35
IS 9
UT 000702404100015
DI 10.1029/2020GB006901
ID 83389
ER

EF