Data/hora: 11/06/2024 09:53:19

Provedor de dados: | 5
País: | France
Título: | Modélisation de la distribution d’espèces benthiques par l’utilisation d’une plateforme multi-agents
Autores: | Razafimahefa, Ntsoa Rakoto.
Data: | 2017-09
Ano: | 2017
Palavras-chave: | Modèle de distribution d’espèce; Mytilus edulis; Dynamic Energy Budget; Connectivité; Recrutement; Compétition spatiale; Scénario de changement climatique; Species distribution model; Mytilus edulis; Dynamic Energy Budget; Connectivity; Recruitment space-limited recruitment; Climate change scenario.
Resumo: | In a context of climate change, understanding the response of species to changes in the environment and the implications for their geographic distribution is paramount. Species distribution models (SDM), through the formulation of relationships between the organism and its environment, provide a tool to explore species response to different types of environmental stresses. This study presents the development and a first application of a mechanistic and generic SDM, using a multi-agent modelling platform: NetLogo. The model allows to simulate the spatialized population dynamic of a bentho-pelagic species, in response to environmental variations. The model developed is an individual-based (IBM) mechanistic model, which incorporates a DEB (Dynamic Energy Budget) model simulating individual life history traits and a population dynamics model that takes into account the process of larval dispersal (connectivity) and competition for space at recruitment. An application of the model is carried out on the mussel Mytilus edulis along the coast of Brittany. 4 environmental scenarios, including a seawater warming scenario based on the results of a climate model (Representative Concentration Pathway RCP8.5 scenario, model CNRM-CM5) are used and compared. The results show little effect of interannual environmental variability on colonization rates. However, an effect of spatial heterogeneity is noticed and highlights a "biological barriers" blocking the colonization from North to South of Brittany. An effect of seawater warming on the demographic structure of M. edulis is evidenced and shows an overall decrease in the number of cohorts and biomass, and a very small increase in the average size of individuals. Concurrently, a significant change in the phenology of the reproduction is. The model developed is now a tool of primary interest which allows exploring the effect of various environmental stresses on the spatial dynamics of bentho-pelagic species populations.
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00405/51631/52187.pdf

http://archimer.ifremer.fr/doc/00405/51631/

Formato: | application/pdf

Fonte:

2017 Agrocampus Rennes

info:eu-repo/semantics/openAccess

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