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Statements

Subject Item
dbr:Extinction_vortex
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Vortex d'extinction Extinction vortex Vortéx de extinção
rdfs:comment
Extinction vortices are a class of models through which conservation biologists, geneticists and ecologists can understand the dynamics of and categorize extinctions in the context of their causes. This model shows the events that ultimately lead small populations to become increasingly vulnerable as they spiral toward extinction. Developed by M. E. Gilpin and M. E. Soulé in 1986, there are currently four classes of extinction vortices. The first two (R and D) deal with environmental factors that have an effect on the ecosystem or community level, such as disturbance, pollution, habitat loss etc. Whereas the second two (F and A) deal with genetic factors such as inbreeding depression and outbreeding depression, genetic drift etc. En écologie, et dans l'étude de la dynamique des populations, la notion de tourbillon d'extinction, spirale d'extinction ou vortex d'extinction (« Extinction vortex » pour les anglophones) correspond à une catégorie de modèles utilisés pour comprendre, décrire ou catégoriser la dynamique et les causes d'extinctions d'espèces et de groupes d'espèces. Ces modèles sont utilisés par des biologistes de la conservation et certains généticiens et écologues.
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dbc:Extinction
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dbc:Extinction dbr:Muller's_ratchet dbr:Ecosystem dbr:Ecologist dbr:Conservation_biology dbr:Extinction dbr:Pollution dbr:Error_catastrophe dbr:Disturbance_(ecology) dbr:Community dbr:Population_dynamics dbr:Habitat_loss dbr:Habitat_fragmentation dbr:Natural_environment dbr:Small_population_size dbr:Michael_Soule dbr:Mutational_meltdown dbr:Heterozygosity dbr:Genetic_diversity dbr:Genetic_drift dbr:Inbreeding_depression dbr:Positive_feedback dbr:Population dbr:Error_threshold_(evolution) dbr:Invasive_species dbr:Genetic_load dbr:Outbreeding_depression dbr:Sex_ratio dbr:Hybrid_(biology) dbr:Conservation_genetics
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dbt:Short_description dbt:Extinction dbt:Citation_needed dbt:Expand_French dbt:Reflist dbt:More_citations_needed
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En écologie, et dans l'étude de la dynamique des populations, la notion de tourbillon d'extinction, spirale d'extinction ou vortex d'extinction (« Extinction vortex » pour les anglophones) correspond à une catégorie de modèles utilisés pour comprendre, décrire ou catégoriser la dynamique et les causes d'extinctions d'espèces et de groupes d'espèces. Ces modèles sont utilisés par des biologistes de la conservation et certains généticiens et écologues. Extinction vortices are a class of models through which conservation biologists, geneticists and ecologists can understand the dynamics of and categorize extinctions in the context of their causes. This model shows the events that ultimately lead small populations to become increasingly vulnerable as they spiral toward extinction. Developed by M. E. Gilpin and M. E. Soulé in 1986, there are currently four classes of extinction vortices. The first two (R and D) deal with environmental factors that have an effect on the ecosystem or community level, such as disturbance, pollution, habitat loss etc. Whereas the second two (F and A) deal with genetic factors such as inbreeding depression and outbreeding depression, genetic drift etc.
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