Potential combined impacts of climate change and non-indigenous species arrivals on Bay of Biscay trophic network structure and functioning
Type | Article | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Date | 2022-04 | ||||||||||||||||
Language | English | ||||||||||||||||
Author(s) | Le Marchand Marie1, 2, Ben Rais Lasram F.3, Araignous Emma2, Saint-Béat Blanche4, Lassalle G.5, Michelet Nicolas2, Serre S.1, Safi Georges2, Lejart Morgane2, Niquil N.6, Le Loch Francois7 | ||||||||||||||||
Affiliation(s) | 1 : Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzané, France 2 : France Energies Marines, 525 avenue Alexis de Rochon, 29280 Plouzané, France 3 : Univ. Littoral Côte d'Opale, Univ. Lille, CNRS, UMR 8187, LOG, Laboratoire d'Océanologie et de Géosciences, F 62930 Wimereux, France 4 : IFREMER, Dyneco Pelagos, BP 70, 29208 Plouzané, France 5 : INRAE, UR EABX, 50 avenue de Verdun, Cestas Cedex 33612, France 6 : Lab BOREA, Team Ecofunc, Université de Caen, CNRS, MNHN, IRD, SU, UA CS 14032, 14000 Caen, France 7 : Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzané, France |
||||||||||||||||
Source | Journal Of Marine Systems (0924-7963) (Elsevier BV), 2022-04 , Vol. 228 , P. 103704 (14p.) | ||||||||||||||||
DOI | 10.1016/j.jmarsys.2022.103704 | ||||||||||||||||
WOS© Times Cited | 1 | ||||||||||||||||
Keyword(s) | Climate change, Non-indigenous species, Ecological Network Analysis, Food web modeling, Fisheries | ||||||||||||||||
Abstract | The consequences of climate change for marine organisms are now well-known, and include metabolism and behavior modification, distribution area shifts and changes in the community. In the Bay of Biscay, the potential environmental niches of subtropical non-indigenous species (NIS) are projected to expand as a response to sea temperature rise by the mid-century under the RCP8.5 climate change scenario. In this context, this study aims to project the combined effects of changes in indigenous species distribution and metabolism and NIS arrivals on the functioning of the Bay of Biscay trophic network. To do this, we created six different Ecopath food web models: a “current situation” trophic model (2007–2016) and five “future” trophic models. The latter five models included various NIS biomass combinations to reflect different potential scenarios of NIS arrivals. For each model, eight Ecological Network Analysis (ENA) indices were calculated, describing the properties of the food web resulting from the sum of interactions between organisms. Our results illustrate that rising temperature increases the quantity of energy passing through the system due to increased productivity. A decrease in the biomass of some trophic groups due to the reduction of their potential environmental niches also leads to changes in the structure of the trophic network. The arrival of NIS is projected to change the fate of organic matter within the ecosystem, with higher cycling, relative ascendency, and a chain-like food web. It could also cause new trophic interactions that could lead to competition and thus modify the food-web structure, with lower omnivory and higher detritivory. The combined impacts (increasing temperatures and NIS arrivals) could lower the resilience and resistance of the system. |
||||||||||||||||
Full Text |
|