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Auteur Richard Frankham |
Documents disponibles écrits par cet auteur (3)
Affiner la rechercheAssessing the benefits and risks of translocations in changing environments: a genetic perspective / Andrew R. Weeks in Evolutionary applications, 4 (6) (2011)
Titre : Assessing the benefits and risks of translocations in changing environments: a genetic perspective Type de document : Imprimé Auteurs : Andrew R. Weeks ; Carla M. Sgro ; Andrew Young ; Richard Frankham ; Nicki J. Mitchell ; Kim A. Miller ; Margaret Byrne ; David J. Coates ; Mark D. B. Eldridge ; Paul Sunnucks ; Martin F. Breed ; Elisabeth A. James ; Ary A. Hoffmann Année de publication : 2011 Article en page(s) : 709-725 Langues : Anglais (eng) Catégories : [LOTERRE-Biodiversité] Changement climatique
[CBNPMP-Thématique] Conservation et gestion des espècesRésumé : Translocations are being increasingly proposed as a way of conserving biodiversity, particularly in the management of threatened and keystone species, with the aims of maintaining biodiversity and ecosystem function under the combined pressures of habitat fragmentation and climate change. Evolutionary genetic considerations should be an important part of translocation strategies, but there is often confusion about concepts and goals. Here, we provide a classification of translocations based on specific genetic goals for both threatened species and ecological restoration, separating targets based on ‘genetic rescue’ of current population fitness from those focused on maintaining adaptive potential. We then provide a framework for assessing the genetic benefits and risks associated with translocations and provide guidelines for managers focused on conserving biodiversity and evolutionary processes. Case studies are developed to illustrate the framework. Lien pérenne : DOI : 10.1111/j.1752-4571.2011.00192.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=149230
in Evolutionary applications > 4 (6) (2011) . - 709-725Weeks, Andrew R., Sgro, Carla M., Young, Andrew, Frankham, Richard, Mitchell, Nicki J., Miller, Kim A., Byrne, Margaret, Coates, David J., Eldridge, Mark D. B., Sunnucks, Paul, Breed, Martin F., James, Elisabeth A., Hoffmann, Ary A. 2011 Assessing the benefits and risks of translocations in changing environments: a genetic perspective. Evolutionary applications, 4(6): 709-725.Documents numériques
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Article (2011)URL
Titre : Genetics and conservation biology Type de document : Imprimé Auteurs : Richard Frankham Année de publication : 2003 Article en page(s) : S22-S29 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Conservation et gestion des espèces Résumé : La génétique de la conservation inclut la gestion génétique des petites populations, la résolution des incertitudes taxinomiques et des unités de gestion, l’utilisation d’analyses moléculaires dans l’expertise et la compréhension de la biologie des espèces. Le rôle des facteurs génétiques dans l’extinction des populations sauvages a été controversé, mais il a été mis en évidence que cela contribue grandement au risque d’extinction. La consanguinité provoque des extinctions de populations sauvages, les modélisations indiquent que la dépression de consanguinité a des effets importants sur les risques d’extinction et la plupart des espèces en danger souffrent de détérioration génétique. La gestion conservatoire sera inapropriée si les facteurs génétiques sont ignorés pour les espèces en danger. Lien pérenne : DOI : 10.1016/S1631-0691(03)00023-4 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148752
in Comptes rendus. Biologies > 326 (2003) . - S22-S29Frankham, Richard 2003 Genetics and conservation biology. Comptes rendus. Biologies, 326: S22-S29.Documents numériques
Article (2003)URL
Titre : Most species are not driven to extinction before genetic factors impact them Type de document : Imprimé Auteurs : Derek Spielman ; Barry W. Brook ; Richard Frankham Année de publication : 2004 Article en page(s) : 15261-15264 Langues : Anglais (eng) Résumé : There is controversy concerning the role of genetic factors in species extinctions. Many authors have asserted that species are usually driven to extinction before genetic factors have time to impact them, but few studies have seriously addressed this issue. If this assertion is true, there will be little difference in genetic diversity between threatened and taxonomically related nonthreatened species. We compared average heterozygosities in 170 threatened taxa with those in taxonomically related nonthreatened taxa in a comprehensive metaanalysis. Heterozygosity was lower in threatened taxa in 77% of comparisons, a highly significant departure from the predictions of the no genetic impact hypothesis. Heterozygosity was on average 35% lower (median 40%) in threatened taxa than in related nonthreatened ones. These differences in heterozygosity indicate lowered evolutionary potential, compromised reproductive fitness, and elevated extinction risk in the wild. Independent evidence from stochastic computer projections has demonstrated that inbreeding depression elevates extinction risk for threatened species in natural habitats when all other threatening processes are included in the models. Thus, most taxa are not driven to extinction before genetic factors affect them adversely. Lien pérenne : DOI : 10.1073/pnas.0403809101 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=149261
in Proceedings of the National Academy of Sciences of the United States of America > 101 (42) (October 2004) . - 15261-15264Spielman, Derek, Brook, Barry W., Frankham, Richard 2004 Most species are not driven to extinction before genetic factors impact them. Proceedings of the National Academy of Sciences of the United States of America, 101(42): 15261-15264.Documents numériques
Article (2004)URL
