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A role for molecular genetics in biological conservation / Stephen J. O'Brien in Proceedings of the National Academy of Sciences of the United States of America, vol. 91, n°13 (Année 1994)
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Titre : A role for molecular genetics in biological conservation Auteurs : Stephen J. O'Brien, Auteur Année de publication : 1994 Article en page(s) : pp. 5748–55 Langues : Anglais (eng) Catégories : [Thèmes] Biologie de la conservation
[Thèmes] Biologie moléculaire
[Thèmes] Plan de conservationMots-clés : génétique des population consanguinité dérive génétique perte de diversité génétique espèce en danger Résumé : "The recognition of recent accelerated depletion of species as a consequence of human industrial development has spawned a wide interest in identifying threats to endangered species. In addition to ecological and demographic perils, it has become clear that small populations that narrowly survive demographic contraction may undergo close inbreeding, genetic drift, and loss of overall genomic variation due to allelic loss or reduction to homozygosity. I review here the consequences of such genetic depletion revealed by applying molecular population genetic analysis to four endangered mammals: African cheetah, lion, Florida panther, and humpback whale. The accumulated genetic results, combined with physiological, ecological, and ethological data, provide a multifaceted perspective of the process of species diminution. An emerging role of population genetics, phylogenetics, and phylogeography as indicators of a population's natural history and its future prognosis provides valuable data of use in the development of conservation management plans for endangered species." (source : auteur) Note de contenu : Ce document aborde le rôle que la génétique moléculaire joue dans la conservation biologique. les principaux points abordés dans le document sont :
- Reconnaissance de la Déplétion Accélérée des Espèces
- Conséquences Génétiques de la Contraction Démographique
- Études de Cas : analyses génétiques moléculaires pour quatre mammifères en danger : le guépard africain, le lion, le panthère de Floride, et la baleine à bosse.
- Utilité de la Génétique des Populations
- Dangers de la Consanguinité
- Recommandations de Gestion : L'auteur discute des recommandations de gestion basées sur les données génétiques et écologiques pour les espèces étudiées. Par exemple, l'introduction de pumas nés au Texas pour améliorer la diversité génétique des panthères de Floride.
En résumé, l'article met en lumière comment les outils de la biologie moléculaire et de la génétique peuvent fournir des données précieuses pour développer des plans de gestion efficaces pour la conservation des espèces en danger.
Type de publication : périodique Référence biblio : O'Brien S., 1994 - A role for molecular genetics in biological conservation. Proceedings of the National Academy of Sciences of the United States of America, 91 (13) : 5748–55. ID PMB : 72263 En ligne : https://www.ncbi.nlm.nih.gov/pmc/articles/PMC44074/ Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=72263
in Proceedings of the National Academy of Sciences of the United States of America > vol. 91, n°13 (Année 1994) . - pp. 5748–55[article]Exemplaires(0)
Disponibilité aucun exemplaire Investigations into the Genetic Variation, Population Structure, and Breeding Systems of the Fern Asplenium trichomanes subsp. quadrivalens / M. Suter in International Journal of Plant Sciences, vol. 161, n°2 (Année 2000)
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Titre : Investigations into the Genetic Variation, Population Structure, and Breeding Systems of the Fern Asplenium trichomanes subsp. quadrivalens Auteurs : M. Suter, Auteur ; J. J. Schneller, Auteur ; J.C. Vogel, Auteur Article en page(s) : pp. 233-244 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Asplenium trichomanes L. subsp. quadrivalens D.E.Mey.
[ZG] Europe
[Thèmes] Fougères
[Thèmes] ReproductionMots-clés : variabilité génétique consanguinité aire de répartition Résumé : "The genetic structure of five populations of the tetraploid fern Asplenium trichomanes subsp. quadrivalens in northern Switzerland was analyzed. Asplenium trichomanes subsp. quadrivalens is one of the most common and most widespread ferns in Europe. In this study we have combined genetic investigations, spatial autocorrelation, and breeding experiments to investigate in detail five populations from natural rock faces. Enzyme electrophoresis revealed very low genetic variability within and among the populations. The small amount of variation was partitioned mainly among the localities, indicated by high Fst values up to 0.764. Overall means of the proportion of polymorphic loci (― Type de publication : périodique Référence biblio : Suter M., Schneller J.-J., Vogel J.-C., 2000 - Investigations into the Genetic Variation, Population Structure, and Breeding Systems of the Fern Asplenium trichomanes subsp. quadrivalens. International Journal of Plant Sciences, 161 (2) : 233-244. ID PMB : 72585 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=72585
in International Journal of Plant Sciences > vol. 161, n°2 (Année 2000) . - pp. 233-244[article]Exemplaires(0)
Disponibilité aucun exemplaire Genetics and Demography in Biological Conservation / Russel Lande in Science, vol. 241, n°4872 ([16/09/1988])
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Titre : Genetics and Demography in Biological Conservation Auteurs : Russel Lande, Auteur Année de publication : 1988 Article en page(s) : pp. 1455-60 Langues : Anglais (eng) Catégories : [Thèmes] Biologie de la conservation Mots-clés : facteur écologique facteur évolutif extinction des populations consanguinité démographie des populations Résumé : "Predicting the extinction of single populations or species requires ecological and evolutionary information. Primary demographic factors affecting population dynamics include social structure, life history variation caused by environmental fluctuation, dispersal in spatially heterogeneous environments, and local extinction and colonization. In small populations, inbreeding can greatly reduce the average individual fitness, and loss of genetic variability from random genetic drift can diminish future adaptability to a changing environment. Theory and empirical examples suggest that demography is usually of more immediate importance than population genetics in determining the minimum viable sizes of wild populations. The practical need in biological conservation for understanding the interaction of demographic and genetic factors in extinction may provide a focus for fundamental advances at the interface of ecology and evolution." (source : auteur) Type de publication : périodique Référence biblio : Lande R., 1988 - Genetics and Demography in Biological Conservation. Science, 241 (4872) : 1455-60. ID PMB : 72257 DOI : 10.1126/science.3420403 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=72257
in Science > vol. 241, n°4872 [16/09/1988] . - pp. 1455-60[article]Exemplaires(0)
Disponibilité aucun exemplaire The expansion history of a sexual and asexual species of Cortaderia in California, USA / John Lambrinos in Journal of Ecology, vol. 89, n°1 (Année 2001)
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Titre : The expansion history of a sexual and asexual species of Cortaderia in California, USA Type de document : texte imprimé Auteurs : John Lambrinos, Auteur Année de publication : 2001 Article en page(s) : pp. 88-98 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Cortaderia selloana (Schult. & Schult.f.) Asch. & Graebn.
[Thèmes] Herbe de la pampaMots-clés : évolution histoire consanguinité plante envahissante Résumé : "The expansion histories of two South American species of Cortaderia, similar in morphology but differing profoundly in their breeding systems, were compared in California, USA.
Both species were introduced to California in the mid-1800s, but herbarium records indicate that the sexual C. selloana has expanded spatially at twice the rate of the asexual C. jubata.
The invasiveness of C. selloana has increased over time, whereas that of C. jubata has remained relatively constant. Populations of C. selloana now occupy more vegetation types and more non-ruderal habitats than C. jubata.
Populations of C. selloana have experienced directional morphological change, whereas the morphology of C. jubata has been constant over the 90 years for which preserved specimens are available.
The invasion of an alien species appears to be a malleable process, rather than a singular event. Species traits, such as inbreeding, can be advantageous at some stages but disadvantageous at others. Alien species also adjust over time to the novel and diverse selective regimes that they encounter as they expand spatially. Sexual species may have a greater ability to adjust to diverse selective landscapes relative to asexual species." (source : auteur)Type de publication : périodique Référence biblio : Lambrinos J., 2001 - The expansion history of a sexual and asexual species of Cortaderia in California, USA. Journal of Ecology, 89 (1) : 88-98. ID PMB : 62685 DOI : 10.1046/j.1365-2745.2001.00524.x Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=62685
in Journal of Ecology > vol. 89, n°1 (Année 2001) . - pp. 88-98[article]Exemplaires(0)
Disponibilité aucun exemplaire