Potential combined impacts of climate change and non-indigenous species arrivals on Bay of Biscay trophic network structure and functioning

Le Marchand, M.; Lasram, F. B.; Araignous, E.; Saint-Beat, B.; Lassalle, G.; Michelet, N.; Serre, S.; Safi, G.; Lejart, M.; Niquil, N.; /Le Loc'h, François

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dc.creator	Le Marchand, M.
dc.creator	Lasram, F. B.
dc.creator	Araignous, E.
dc.creator	Saint-Beat, B.
dc.creator	Lassalle, G.
dc.creator	Michelet, N.
dc.creator	Serre, S.
dc.creator	Safi, G.
dc.creator	Lejart, M.
dc.creator	Niquil, N.
dc.creator	/Le Loc'h, François
dc.date	2022
dc.date.accessioned	2022-04-27T17:37:49Z
dc.date.available	2022-04-27T17:37:49Z
dc.identifier	https://www.documentation.ird.fr/hor/fdi:010084491
dc.identifier	oai:ird.fr:fdi:010084491
dc.identifier	Le Marchand M., Lasram F. B., Araignous E., Saint-Beat B., Lassalle G., Michelet N., Serre S., Safi G., Lejart M., Niquil N., Le Loc'h François. Potential combined impacts of climate change and non-indigenous species arrivals on Bay of Biscay trophic network structure and functioning. 2022, 228, p. 103704 [14 p.]
dc.identifier.uri	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/169109
dc.description	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.
dc.language	EN
dc.subject	Climate change
dc.subject	Non-indigenous species
dc.subject	Ecological Network Analysis
dc.subject	Food web modeling
dc.subject	Fisheries
dc.title	Potential combined impacts of climate change and non-indigenous species arrivals on Bay of Biscay trophic network structure and functioning
dc.type	text
dc.coverage	ATLANTIQUE
dc.coverage	FRANCE
dc.coverage	BISCAYE BAIE