Title :

From species distributions to ecosystem structure and function: A methodological perspective

Author(s) :

Chaalali, Aurélie [Auteur correspondant]
Biologie des Organismes et Ecosystèmes Aquatiques [BOREA]
Beaugrand, Grégory [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Raybaud, Virginie [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Centre Scientifique de Monaco [CSM]
Lassalle, Géraldine [Auteur]
Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture [IRSTEA]
Saint-Béat, Blanche [Auteur]
Biologie des Organismes et Ecosystèmes Aquatiques [BOREA]
LIttoral ENvironnement et Sociétés [LIENSs]
Le Loc’h, François [Auteur]
Institut de Recherche pour le Développement [IRD]
Laboratoire des Sciences de l'Environnement Marin (LEMAR) [LEMAR]
Bopp, Laurent [Auteur]
Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
Tecchio, Samuele [Auteur]
Biologie des Organismes et Ecosystèmes Aquatiques [BOREA]
Safi, Georges [Auteur]
Biologie des Organismes et Ecosystèmes Aquatiques [BOREA]
Chifflet, Marina [Auteur]
AZTI - Tecnalia
Lobry, Jérémy [Auteur]
Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture [IRSTEA]
Niquil, Nathalie [Auteur]
Biologie des Organismes et Ecosystèmes Aquatiques [BOREA]

Journal title :

ECOLOGICAL MODELLING

Pages :

78-90

Publisher :

Elsevier

Publication date :

2016-08-24

ISSN :

0304-3800

English keyword(s) :

ACL
Ecological niche
Food web
Small pelagics
Linear Inverse Model
Ecological Network Analysis
Climate-induced changes

HAL domain(s) :

Sciences du Vivant [q-bio]/Ecologie, Environnement/Ecosystèmes
Sciences de l'environnement/Milieux et Changements globaux
Sciences de l'environnement/Biodiversité et Ecologie

English abstract : [en]

As species biology and ecology is profoundly influenced by climate, any climatic alteration may have severe consequences on marine pelagic ecosystems and their food webs. It remains challenging to estimate the influence ...
Show more >As species biology and ecology is profoundly influenced by climate, any climatic alteration may have severe consequences on marine pelagic ecosystems and their food webs. It remains challenging to estimate the influence of climate on both structural and functional properties of food webs. In this study, we proposed an innovative approach to assess the propagating effects of climate change on ecosystem food web. The approach is based on a sensitivity analysis of a food-web model, a linear inverse model using a Monte Carlo method coupled with a Markov Chain, in which changes in the values of parameters are driven by external Ecological Niche Model outputs. Our sensitivity analysis was restricted to parameters regarding a keystone functional group in marine ecosystems, i.e. small pelagic fish. At the ecosystem level, the consequences were evaluated using both structural and functional ecological network indices. The approach is innovative as it is the first time that these three methods were combined to assess ecological network indices sensitivity to future climatic pressure. This coupling method was applied on the French continental shelf of the Bay of Biscay for which a food-web model already exists and where future changes in the distribution of small pelagic fish have already been examined through model building and projections. In response to the sensitivity analysis corresponding to an increase in small pelagics production only, our results suggested a more active system with an intense plankton-small pelagics-seabirds chain and an efficient recycling to maximize detritus use in the system in relation with detritus export. All results combined together seemed to be in favor of a system adapting to sustain the tested increase in production of small pelagic planktivores. Finally, regarding the innovative combination of numerical tools presented, even if further investigations are still necessary to get a more realistic view of cumulative effects resulting from one given pressure (or more) on a food web (e.g. altering different biological compartments at the same time), the Ecological Network Analysis indices values showed a higher variability under the scenarios of change. Our study thus pointed out a promising methodology to assess propagating changes in structural and functional ecosystem properties.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

European Project :

DEVelopment Of innovative Tools for understanding marine biodiversity and assessing good Environmental Status

Comment :

[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL