FN Archimer Export Format
PT J
TI Isotopic and elemental compositions reveal density‐dependent nutrition pathways in a population of mixotrophic jellyfish
BT 
AF Djeghri, Nicolas
   Pondaven, Philippe
   Stockenreiter, Maria
   Behl, Stephan
   Huang, Jessica Y. T.
   Hansen, Thomas
   Patris, Sharon
   Ucharm, Gerda
   Stibor, Herwig
AS 1:1;2:1;3:2;4:2;5:2;6:3;7:4;8:4;9:2;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 Laboratoire des Sciences de l'Environnement Marin, LEMAR Institut Unversitaire Européen, IUEMUniversité de Brest, UBO Rue Dumont d'Urville Plouzané 29280, France
   Department Biologie II, Aquatische Ökologie Ludwig‐Maximilians‐Universität München Großhaderner Str. 2 Planegg‐Martinsried 82152, Germany
   Department of Marine Ecology GEOMAR Helmholtz Centre for Ocean Research Kiel Experimental Ecology‐Food Webs Düsternbrooker Weg 20 Kiel24015, Germany
   Coral Reef Research Foundation PO Box 1765 Koror PW96940, Palau
C2 UBO, FRANCE
   UNIV MUNCHEN, GERMANY
   IFM GEOMAR, GERMANY
   CORAL REEF RESEARCH FND, PALAU
UM LEMAR
IN WOS Cotutelle UMR
   DOAJ
   copubli-europe
   copubli-int-hors-europe
   copubli-sud
IF 3.171
TC 1
UR https://archimer.ifremer.fr/doc/00663/77469/79159.pdf
   https://archimer.ifremer.fr/doc/00663/77469/79160.pdf
   https://archimer.ifremer.fr/doc/00663/77469/79161.docx
LA English
DT Article
DE ;density dependence;jellyfish;marine lakes;mixotrophy;stable isotopes;symbiosis;zooxanthellae
AB Mixotrophic organisms are increasingly recognized as important components of ecosystems, but the factors controlling their nutrition pathways (in particular their autotrophy–heterotrophy balance) are little known. Both autotrophy and heterotrophy are expected to respond to density‐dependent mechanisms but not necessarily in the same direction and/or strength. We hypothesize that the autotrophy–heterotrophy balance of mixotrophic organisms might therefore be a function of population densities. To investigate this relationship, we sampled mixotrophic jellyfish holobionts (host, Mastigias papua etpisoni; symbiont, Cladocopium sp.) in a marine lake (Palau, Micronesia) on six occasions (from 2010 to 2018). Over this period, population densities varied ~100 fold. We characterized the nutrition of the holobionts using the δ13C and δ15N signatures as well as C:N ratios. δ13C values increased and δ15N values decreased with increasing population densities (respectively, R2 = 0.86 and 0.70, P < 0.05). Although less distinct, C:N ratios increased with increasing population densities (R2 = 0.59, 0.1 > P > 0.05). This indicates that the autotrophy–heterotrophy balance tends toward autotrophy when population densities increase. We propose that the availability of zooplanktonic prey is the main driver of this pattern. These results demonstrate that the autotrophy–heterotrophy balance of mixotrophic jellyfishes can be tightly regulated by density‐dependent mechanisms. 
PY 2020
PD NOV
SO Ecosphere
SN 2150-8925
PU Wiley
VL 11
IS 11
UT 000598784300012
DI 10.1002/ecs2.3295
ID 77469
ER

EF