Consulta: subjectFacets:"Individual-based model"
Registros recuperados: 13
Data/hora: 13/06/2024 07:57:01

Model-Based Estimation of Collision Risks of Predatory Birds with Wind Turbines
Provedor de dados: 7
Autores: Eichhorn, Marcus; UFZ-Helmhotz Centre for Environmental Research; marcus.eichhorn@ufz.de; Johst, Karin; UFZ-Helmhotz Centre for Environmental Research; karin.johst@ufz.de; Seppelt, Ralf; UFZ-Helmhotz Centre for Environmental Research; ralf.seppelt@ufz.de; Drechsler, Martin; UFZ-Helmholtz Centre for Environmental Research; martin.drechsler@ufz.de.
Tipo: Peer-Reviewed Reports
Palavras-chave: Collision risk; Foraging behavior; Impact assessment; Individual-based model; Milvus milvus; Red Kite; Spatial model; Wind power.
Ano: 2012

Impact d’une obligation de débarquement sur les dynamiques couplées écosystème-pêcheurs : approche par modélisation individu-centrée appliquée à la Manche orientale
Provedor de dados: 5
Autores: Bourdaud, Pierre.
The objective of this thesis was to anticipate the effects if the EU Landing Obligation (LO) implemented since the beginning of 2015 in the Eastern English Channel (EEC). To achieve these objectives, it was planned to: i) better understand seasonal spatial distribution of commercial species using on-board commercial vessels observation data, ii) compare them with the fine scale fishing effort distribution of EEC bottom otter trawlers (OTB), and iii) develop an individual-based model of fleet-dynamics, DSVM, to be integrated within the ecosystem model OSMOSE to simulate a LO. The usefulness of on-board observation data was proved for a main part of a species sample, using validation from the literature and a geostatistical indicator. Then the comparison of...
Tipo: Text
Palavras-chave: Distribution spatiale; Saisonnalité; Données commerciales; Données de campagnes scientifiques; Manche Orientale; Effort de pêche; Assemblages d’espèces cibles; Obligation de débarquement; Modèle individu-centré; Dynamiques des flottilles; Spatial distribution; Seasonality; Commercial data; Survey data; Eastern English Channel; Fishing effort; Target species assemblages; Landing obligation; Individual-based model; Fleet dynamics.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00440/55135/56603.pdf

Modeling the emergence of migratory corridors and foraging hot spots of the green sea turtle
Provedor de dados: 5
Autores: Dalleau, Mayeul; Kramer‐schadt, Stephanie; Gangat, Yassine; Bourjea, Jerome; Lajoie, Gilles; Grimm, Volker.
Environmental factors shape the spatial distribution and dynamics of populations. Understanding how these factors interact with movement behavior is critical for efficient conservation, in particular for migratory species. Adult female green sea turtles, Chelonia mydas, migrate between foraging and nesting sites that are generally separated by thousands of kilometers. As an emblematic endangered species, green turtles have been intensively studied, with a focus on nesting, migration, and foraging. Nevertheless, few attempts integrated these behaviors and their trade‐offs by considering the spatial configurations of foraging and nesting grounds as well as environmental heterogeneity like oceanic currents and food distribution. We developed an...
Tipo: Text
Palavras-chave: Connectivity; Corridors; Individual-based model; Migration; Movement; Sea turtle.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00512/62337/66597.pdf

A biophysical model of S. aurita early life history in the northern Gulf of Guinea
Provedor de dados: 5
Autores: Kone, Vamara; Lett, Christophe; Penven, Pierrick; Bourles, Bernard; Djakoure, Sandrine.
S. aurita is the most abundant small pelagic fish in the northern Gulf of Guinea. Its reproduction and recruitment depend crucially on environmental conditions. We developed a biophysical model of S. aurita early life history by coupling offline an individual-based model with the regional oceanic modeling system (ROMS). We used this model to investigate the main factors driving variability in eggs and larval dispersal and survival in the northern Gulf of Guinea. Precisely, individuals were released from different spawning areas along the coast and tracked for a period of 28 days corresponding to their planktonic phase. Individuals that remained in the coastal recruitment areas at an age more than 7 days, at which they can supposedly actively retain...
Tipo: Text
Palavras-chave: Hydrodynamic model; Individual-based model; S. aurita early life stage; Recruitment; Upwelling; Northern Gulf of Guinea.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00357/46790/46656.pdf

Global change and climate-driven invasion of the Pacific oyster (Crassostrea gigas) along European coasts: a bioenergetics modelling approach
Provedor de dados: 5
Autores: Thomas, Yoann; Pouvreau, Stephane; Alunno-bruscia, Marianne; Barille, Laurent; Gohin, Francis; Bryere, Philippe; Gernez, Pierre.
Aim  The spread of non-indigenous species in marine ecosystems world-wide is one of today's most serious environmental concerns. Using mechanistic modelling, we investigated how global change relates to the invasion of European coasts by a non-native marine invertebrate, the Pacific oyster Crassostrea gigas.  Location Bourgneuf Bay on the French Atlantic coast was considered as the northern boundary of C. gigas expansion at the time of its introduction to Europe in the 1970s. From this latitudinal reference, variations in the spatial distribution of the C. gigas reproductive niche were analysed along the north-western European coast from Gibraltar to Norway.  Methods The effects of environmental variations on C. gigas physiology and phenology were studied...
Tipo: Text
Palavras-chave: Biogeographical range expansion; Crassostrea gigas; DEB model; European coasts; Functional traits; Global change; Individual-based model; Invasive species; Remote-sensing.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00287/39828/38459.pdf

Coupling hydrodynamic and individual-based models to simulate long-term larval supply to coastal nursery areas
Provedor de dados: 5
Autores: Rochette, Sebastien; Huret, Martin; Rivot, Etienne; Le Pape, Olivier.
For many marine fish species, recruitment is strongly related to larval survival and dispersal to nursery areas. Simulating larval drift should help assessing the sensitivity of recruitment variability to early life history. An individual-based model (IBM) coupled to a hydrodynamic model was used to simulate common sole larval supply from spawning areas to coastal and estuarine nursery grounds at the population scale in the eastern Channel on a 14-yr time series, from 1991 to 2004. The IBM allowed each particle released to be transported by currents from the hydrodynamic model, to grow with temperature, to migrate vertically giving stage development, and possibly to die according to drift duration, representing the life history from spawning to...
Tipo: Text
Palavras-chave: Eastern Channel; Hydrodynamic model; Individual-based model; Larval supply; Nursery grounds; Recruitment variability; Solea solea.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00085/19598/17236.pdf

Emergence of negative trophic level-size relationships from a size-based, individual-based multispecies fish model
Provedor de dados: 5
Autores: Travers-trolet, Morgane; Coppin, Franck; Cresson, Pierre; Cugier, Philippe; Oliveros-ramos, Ricardo; Verley, Philippe.
Modeling the mechanisms underlying trophic interactions between individuals allows the food web structure to emerge from local interactions, which constitutes a prerequisite for assessing how marine ecosystems respond to various anthropogenic pressures. Using a multispecies spatially explicit individual-based model, the emergence of trophic patterns was explored in the eastern English Channel ecosystem, where pelagic-benthic trophic coupling was recently studied empirically. The OSMOSE model was applied to this ecosystem by explicitly representing the life cycle of 13 fish species and one squid group, forced by pelagic and benthic prey fields that are variable over time and space. A matrix defining possible accessibilities between life stages was added to...
Tipo: Text
Palavras-chave: Emergent patterns; Pelagic-benthic coupling; Individual-based model; Food web; Fish community.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00511/62290/66748.pdf

Individual-based simulation of the spatial and temporal dynamics of macroinvertebrate functional groups provides insights into benthic community assembly mechanisms
Provedor de dados: 5
Autores: Alexandridis, Nikolaos; Bacher, Cedric; Desroy, Nicolas; Jean, Fred.
The complexity and scales of the processes that shape communities of marine benthic macroinvertebrates has limited our understanding of their assembly mechanisms and the potential to make projections of their spatial and temporal dynamics. Individual-based models can shed light on community assembly mechanisms, by allowing observed spatiotemporal patterns to emerge from first principles about the modeled organisms. Previous work in the Rance estuary (Brittany, France) revealed the principal functional components of its benthic macroinvertebrate communities and derived a set of functional relationships between them. These elements were combined here for the development of a dynamic and spatially explicit model that operates at two spatial scales. At the...
Tipo: Text
Palavras-chave: Individual-based model; Inter-scale modeling; Functional groups; Benthic macroinvertebrates; Community assembly; Biological traits; Biotic interactions; Alpha-diversity; Beta-diversity; Rance estuary.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00445/55654/57319.pdf

A coupled movement and bioenergetics model to explore the spawning migration of anchovy in the Bay of Biscay
Provedor de dados: 5
Autores: Politikos, Dimitrios; Huret, Martin; Petitgas, Pierre.
Adult anchovies in the Bay of Biscay perform north to south migration from late winter to early summer for spawning. However, what triggers and drives the geographic shift of the population remains unclear and poorly understood. An individual-based fish model has been implemented to explore the potential mechanisms that control anchovy's movement routes toward its spawning habitats. To achieve this goal, two fish movement behaviors – gradient detection through restricted area search and kinesis – simulated fish response to its dynamic environment. A bioenergetics model was used to represent individual growth and reproduction along the fish trajectory. The environmental forcing (food, temperature) of the model was provided by a coupled...
Tipo: Text
Palavras-chave: Individual-based model; Behavioral movement; Dynamic Energy Budget; Anchovy; Bay of Biscay.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00273/38446/36868.pdf

Integration of bioenergetics in an individual-based model to hindcast anchovy dynamics in the Bay of Biscay
Provedor de dados: 5
Autores: Bueno-pardo, Juan; Petitgas, Pierre; Kay, Susan; Huret, Martin.
The population of European anchovy of the Bay of Biscay collapsed at the beginning of the 21st century, causing the closure of its fishery between 2005 and 2010. In order to study both the human and environmental causes of the anchovy population dynamics, an approach coupling individual bioenergetics to an individual-based model was applied between 2000 and 2015. This modelling framework was forced with outputs from a physical–biogeochemical model. In addition to a base-case scenario with realistic forcing, alternative scenarios were run without inter-annual variability in either fishing mortality or environmental conditions. During the decrease in population biomass, a high fishing pressure coincided with a combination of environmental variables promoting...
Tipo: Text
Palavras-chave: Anchovy; Bay of Biscay; Dynamic Energy Budget; Fishery; Harvest control rule; Individual-based model; Population collapse.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00598/70984/69272.pdf

Processes leading to the coexistence of a host and its parasitoid in homogeneous environments: The role of an infected dormant stage
Provedor de dados: 5
Autores: Arancio, Marc; Sourisseau, Marc; Souissi, Sami.
Theoretical studies have usually been used to explain host–parasitoid persistence in conditions of spatial heterogeneity or in homogeneous environments with specific conditions. In shallow estuaries where spatial heterogeneity is prevented by tides and river input, a common host–parasitoid system (dinoflagellate-Amoebophrya spp.) is able to persist even in the absence of specific conditions described in the literature. Recent observations have revealed that the cyst stage (during which the dinoflagellate host can survive in difficult environmental conditions in a dormant stage) can be infected by the parasitoid. The encystment/excystment process is suspected to be the basis for the long-term persistence of the system. In this work, the coexistence of...
Tipo: Text
Palavras-chave: Individual-based model; Dinoflagellate; Parasitoid; Amoebophrya; Host-parasite interactions; Sources of coexistence.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00180/29119/27692.pdf

Sole larval supply to coastal nurseries: Interannual variability and connectivity at interregional and interpopulation scales
Provedor de dados: 5
Autores: Savina-, Marie; Lunghi, Mathias; Archambault, B.; Baulier, Loic; Huret, Martin; Le Pape, Olivier.
Simulating fish larval drift helps assess the sensitivity of recruitment variability to early life history. An individual-based model (IBM) coupled to a hydrodynamic model was used to simulate common sole larval supply from spawning areas to coastal and estuarine nursery grounds at the meta-population scale (4 assessed stocks), from the southern North Sea to the Bay of Biscay (Western Europe) on a 26-yr time series, from 1982 to 2007. The IBM allowed each particle released to be transported by currents, to grow depending on temperature, to migrate vertically depending on development stage, to die along pelagic stages or to settle successfully on a nursery, representing the life history from spawning to metamorphosis. The model outputs were analysed to...
Tipo: Text
Palavras-chave: Hydrodynamic model; Individual-based model; Larval supply; Nursery grounds; Recruitment variability; Solea solea; Metapopulation; English Channel; Bay of Biscay; Southern North Sea.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00297/40775/39782.pdf

An end-to-end coupled model ROMS-N(2)P(2)Z(2)D(2)-OSMOSE of the southern Benguela foodweb: parameterisation, calibration and pattern-oriented validation
Provedor de dados: 5
Autores: Travers-trolet, Morgane; Shin, Yunne-jai; Field, J. G.
In order to better understand ecosystem functioning under simultaneous pressures (e.g. both climate change and fishing pressures), integrated modelling approaches are advocated. We developed an end-to-end model of the southern Benguela ecosystem by coupling the high trophic level model OSMOSE with a biophysical model (ROMS-N(2)P(2)Z(2)D(2)). OSMOSE is a spatial, multispecies, individual-based model simulating the whole life cycle of fish with fish schools interacting through opportunistic and size-based predation. It is linked to the biogeochemical model through the predation process; plankton groups are food for fish and fish apply a predation mortality on plankton. Here we describe the two-way coupling between the models and follow a pattern-oriented...
Tipo: Text
Palavras-chave: Individual-based model; Model validation; Pattern-oriented modelling; Trophic interactions; Two-way coupling.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00193/30457/83335.pdf