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Factors Controlling the Distribution of Tilia cordata at the Northern Limits of Its Geographical Range, II. History in North-West England / C. D. Pigott in New phytologist, vol. 84, n°1 (Année 1980)
[article]
Titre : Factors Controlling the Distribution of Tilia cordata at the Northern Limits of Its Geographical Range, II. History in North-West England Type de document : texte imprimé Auteurs : C. D. Pigott, Auteur ; Jacqueline P. Huntley, Auteur Année de publication : 1980 Article en page(s) : pp. 145-164 Langues : Anglais (eng) Catégories : [ZG] Royaume-Uni
[Espèces (in biblio)] Tilia cordataMots-clés : aire de répartition Résumé : "Pollen originating from small populations of Tilia cordata is largely deposited within a few hundred metres of the trees, so that their presence can only be detected by pollen analysis at sites within distances of this order. Pollen diagrams from such sites show a continuous curve for Tilia pollen extending to the present surface, although the values may be only about 1 % of arboreal pollen. Pollen analysis shows that T. cordata was present in the Lake District by about 5000 to 4800 B.C.; it then became plentiful in the southern valleys and extended to reach its present north-western limit, or just beyond, by 3100 B.C., when migration ceased. While the tree was extending its range, it must have been able to produce frequent large crops of fertile seed but subsequently regeneration from seed ceased. After 3100 B.C. the proportion of its pollen initially may increase but then generally decreases. Although there are small recoveries at several horizons, these are not certain evidence of reproduction by seed. Failure to produce fertile seed renders the species particularly sensitive to woodland clearance and has resulted in a decrease in abundance within the Lake District and its virtual extinction in west Yorkshire and south Lancashire." (source : auteurs) Type de publication : périodique Référence biblio : Pigott C.-D., Huntley J.-P., 1980 - Factors Controlling the Distribution of Tilia cordata at the Northern Limits of Its Geographical Range, II. History in North-West England. New phytologist, 84 (1) : 145-164. ID PMB : 71350 En ligne : https://nph.onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.1980.tb00757.x Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71350
in New phytologist > vol. 84, n°1 (Année 1980) . - pp. 145-164[article]Exemplaires(0)
Disponibilité aucun exemplaire The Status of Tilia Cordata and T. Platyphyllos on the Derbyshire Limestone / C. D. Pigott in Journal of Ecology, vol. 57, n°2 (Année 1969)
[article]
Titre : The Status of Tilia Cordata and T. Platyphyllos on the Derbyshire Limestone Type de document : texte imprimé Auteurs : C. D. Pigott, Auteur Année de publication : 1969 Article en page(s) : pp. 491-504 Langues : Anglais (eng) Catégories : [ZG] Royaume-Uni
[Espèces (in biblio)] Tilia cordata
[Espèces (in biblio)] Tilia platyphyllos
[Thèmes] Morphologie végétaleMots-clés : aire de répartition comparaison d'espèces relevé phytosociologique Résumé : "Analysis of the morphological variation shown by eight populations of Tilia in Derbyshire indicates that they are composed of T. cordata, T. platyphyllos and hybrids. The occurrence of Tilia is correlated with a characteristic age structure of the woodland and the presence of several other species of very restricted distribution. It is suggested that these limited areas of woodland are of considerable antiquity, whereas much of the present woodland which is dominated by Fraxinus excelsior and Crataegus monogyna is of relatively recent origin." (source : auteur) Type de publication : périodique Référence biblio : Pigott C.-D., 1969 - The Status of Tilia Cordata and T. Platyphyllos on the Derbyshire Limestone. Journal of Ecology, 57 (2) : 491-504. ID PMB : 71330 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71330
in Journal of Ecology > vol. 57, n°2 (Année 1969) . - pp. 491-504[article]Exemplaires(0)
Disponibilité aucun exemplaire