Poster (Scientific congresses and symposiums)
Trophic ecology of icefishes (Notothenioidei, Perciformes) in a context of climate change
Peignot, Quentin; Frederich, Bruno; Lepoint, Gilles et al.
2017ZOOLOGY 2017 - 25th Benelux congress of Zoology
 

Files


Full Text
Poster_Zoology_PEIGNOT.pdf
Author postprint (164.6 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
stable isotopes; icefish; Antarctica; trophic ecology
Abstract :
[en] The Southern Ocean currently undergoes major environmental modifications related to climate change. When faced with environmental changes, all organisms are expected to have some intrinsic capacity to adapt their ecological habits to their new life conditions. Currently, biological traits of many Antarctic species are still unknown and we need such information to assess their capacity to adapt to natural and anthropogenic perturbations. Notothenioidei (Perciformes), or icefishes, are endemic to the Southern Ocean and they are an important trophic component of these marine ecosystems. Here we used stable isotopes ratios of carbon (δ13C) and nitrogen (δ15N) of two well represented genera of icefishes (Trematomus and Lepidonotothen) sampled in 2002/2004 and/or in 2015/2016 to better understand their resources partitioning and the influence of environmental changes on their trophic ecology. Isotopic niches (which are a proxy of the realized ecological niches) were modeled using the SIBER (Stable Isotope Bayesian Ellipses in R) R-package. Our results revealed a great variation in isotopic compositions among icefishes, suggesting that they exploit a wide array of resources. The overlap between the isotopic niches of Trematomus and Lepidonotothen genera in 2002/2004 highlights a possible past competition for resources. Moreover, temporal evolution of niches suggests taxon-specific ecological plasticity in response to variation in environmental parameters and/or in prey availability. An increase in resources partitioning between the two genera was observed over the studied period. In the future, it would be interesting to use mixing models including isotopic composition of potential preys to identify possible changes in their trophic ecology.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Disciplines :
Zoology
Environmental sciences & ecology
Aquatic sciences & oceanology
Author, co-author :
Peignot, Quentin;  Université de Liège - ULiège > Département de Biologie, Ecologie, Evolution > Océanographie biologique
Frederich, Bruno  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Lepoint, Gilles  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Michel, Loïc  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Océanographie biologique
Language :
English
Title :
Trophic ecology of icefishes (Notothenioidei, Perciformes) in a context of climate change
Publication date :
23 November 2017
Number of pages :
A0
Event name :
ZOOLOGY 2017 - 25th Benelux congress of Zoology
Event organizer :
Royal Dutch Zoological Society
Royal Belgian Zoological Society
Event place :
Wageningen, Netherlands
Event date :
23 novembre au 24 novembre 2017
Audience :
International
Name of the research project :
Refugia and Ecosystem Tolerance in the Southern Ocean (RECTO)
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
Available on ORBi :
since 21 November 2017

Statistics


Number of views
184 (12 by ULiège)
Number of downloads
64 (6 by ULiège)

Bibliography


Similar publications



Contact ORBi