FN Archimer Export Format
PT J
TI The Canadian Beaufort Shelf trophic structure: evaluating an ecosystem modelling approach by comparison with observed stable isotopic structure
BT 
AF Hoover, Carie
   Giraldo, Carolina
   Ehrman, Ashley
   Suchy, Karyn D.
   MacPhee, Shannon A.
   Brewster, Jasmine D
   Reist, Jim D.
   Power, Michael
   Swanson, Heidi
   Loseto, Lisa L.
AS 1:1,2;2:2,3;3:2;4:4;5:2;6:1,2;7:2;8:5;9:5;10:2;
FF 1:;2:PDG-RBE-HMMN-LRHBL;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Univ Manitoba, Ctr Earth Observat Sci, Winnipeg, MB R3T 2N2, Canada
   Fisheries & Oceans Canada, Cent & Arctic Reg, 501 Univ Crescent, Winnipeg, MB R3T 2N6, Canada
   IFREMER, HMMN, Ctr Manche Mer Nord, BP 669, F-62321 Boulogne Sur Mer, France
   Univ Victoria, Dept Geog, Victoria, BC V8W 2Y2, Canada
   Univ Waterloo, Biol Dept, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada
C2 UNIV MANITOBA, CANADA
   MPO, CANADA
   IFREMER, FRANCE
   UNIV VICTORIA, CANADA
   UNIV WATERLOO, CANADA
SI BOULOGNE
SE PDG-RBE-HMMN-LRHBL
IN WOS Ifremer UPR
   DOAJ
   copubli-int-hors-europe
IF 3.3
TC 5
UR https://archimer.ifremer.fr/doc/00709/82155/86945.pdf
   https://archimer.ifremer.fr/doc/00709/82155/92124.docx
LA English
DT Article
DE ;Ecopath with Ecosim;stable isotopes of nitrogen;trophic level;marine ecosystem
AB Climate-driven impacts on marine trophic pathways worldwide are compounded by sea-ice loss at northern latitudes. For the Arctic, current information describing food web linkages is fragmented, and there is a need for tools that can describe overarching trophic structure despite limited species-specific data. Here, we tested the ability of a mass-balanced ecosystem model (Ecopath with Ecosim, EwE) to reconstruct the trophic hierarchy of 31 groups, from primary producers to polar bears, in the Canadian Beaufort Sea continental shelf. Trophic level (TL) estimates from EwE were compared with those derived from two nitrogen stable isotope (SI) modelling approaches (SI linear and scaled) to assess EwE accuracy, using a dataset of 642 δ15N observations across 282 taxa. TLs from EwE were strongly, positively related to those from both SI models (R2 > 0.80). EwE performed well (within 0.2 TL) for groups with relatively well-known diets or for taxa characterized by fewer trophic connections (e.g., primary consumers). Performance was worse (> 0.5 TL) for species groups aggregated at coarse taxonomic levels, those with poorly documented diets, and for anadromous fishes. Comparisons with SI models suggested that the scaled approach can overestimate the TL of top predators if ecosystem-specific information is not considered. 
PY 2022
PD MAR
SO Arctic Science
SN 2368-7460
PU Canadian Science Publishing
VL 8
IS 1
UT 000807544300008
BP 292
EP 312
DI 10.1139/AS-2020-0035
ID 82155
ER

EF