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CBNPMP-Thèmes > Physiologie végétale > Fructification et semences > Banque de semences dans le sol
Banque de semences dans le sol |
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Seed bank of annual mudflat species at lake Vikarsjon, central Sweden / Per Milberg in Svensk botanisk tidskrift, 88 (4) (1994)
[article]
Titre : Seed bank of annual mudflat species at lake Vikarsjon, central Sweden Type de document : Imprimé Auteurs : Per Milberg ; B. Stridh Année de publication : 1994 Article en page(s) : 237-240 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Banque de semences dans le sol Mots-clés : Elatine Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=137529
in Svensk botanisk tidskrift > 88 (4) (1994) . - 237-240Milberg, P., Stridh, B. 1994. Seed bank of annual mudflat species at lake Vikarsjon, central Sweden. Svensk botanisk tidskrift, 88(4): 237-240.Seed dispersal and germination patterns in a rare Mediterranean island endemic (Anchusa crispa Viv., Boraginaceae) / Angélique Quilichini (2000)
Titre : Seed dispersal and germination patterns in a rare Mediterranean island endemic (Anchusa crispa Viv., Boraginaceae) Type de document : Tiré à part de revue Auteurs : Angélique Quilichini (1970-) ; Max Debussche (1948-) Année de publication : 2000 Importance : 303-313 Langues : Français (fre) Catégories : [CBNPMP-Thèmes] Banque de semences dans le sol
[CBNPMP-Thèmes] Ecologie de la germination
[CBNPMP-Thèmes] Mode de diffusion des semences
[CBNPMP-Géographique] Corse (France)Mots-clés : Anchusa crispa Viv. Résumé : We analyse and discuss patterns of seed dispersal and germination of a rare endemic plant species, Anchusa crispa Viv. (Boraginaceae) from Corsica and Sardinia. This coastal plant inhabits dunes and back-dunes, and currently numbers only a few thousand individuals which generally occur in isolated populations. This study included experiments conducted in the field in Corsica and also under controlled conditions in the laboratory. Short-distance dispersal of A. crispa is performed by ants, both by myrmecochory and dyszoochory. The invasion of an exotic species of ant, Linepithema humile, could locally modify the dispersal system and possibly the population dynamics of A. crispa. Long-distance dispersal may occur by water transport since seeds can germinate after at least 1 week of immersion in seawater and readily float on the surface. Burial of seeds is favourable for germination, percentage germination being maximised at a depth of 1–2 cm below the soil surface. A. crispa has a seed bank of about ten viable seeds per m2, which may contribute to the survival of this species which exists in small populations with a short life span. Due to its seed dispersal and germination patterns, the conservation of this species will necessitate that human disturbance, which can destabilise the surface of the sand is prevented and that new populations are introduced to favourable sites. Lien pérenne : DOI : 10.1016/S1146-609X(00)01089-4 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=130702 Quilichini, A., Debussche, M. 2000. Seed dispersal and germination patterns in a rare Mediterranean island endemic (Anchusa crispa Viv., Boraginaceae). Acta oecologica. Oecologia generalis, 21(6) : 303-313.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 10870 Quilichini A. Tiré à part Centre de documentation Tirés à part Consultable The seed bank longevity index revisited : limited reliability evident from a burial experiment and database analyses / Arne Saatkamp in Annals of Botany, 104 (4) (2009)
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Titre : The seed bank longevity index revisited : limited reliability evident from a burial experiment and database analyses Type de document : Électronique Auteurs : Arne Saatkamp ; Laurence Affre (1969-) ; Thierry Dutoit (1967-) ; Peter Poschlod Année de publication : 2009 Article en page(s) : 715-724 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Banque de semences dans le sol
[CBNPMP-Thèmes] Longévité des semences
[CBNPMP-Thèmes] MessicoleMots-clés : Bifora testiculata Carthamus lanatus Centaurea solstitialis L. Résumé : Seed survival in the soil contributes to population persistence and community diversity, creating a need for reliable measures of soil seed bank persistence. Several methods estimate soil seed bank persistence, most of which count seedlings emerging from soil samples. Seasonality, depth distribution and presence (or absence) in vegetation are then used to classify a species' soil seed bank into persistent or transient, often synthesized into a longevity index. This study aims to determine if counts of seedlings from soil samples yield reliable seed bank persistence estimates and if this is correlated to seed production. Seeds of 38 annual weeds taken from arable fields were buried in the field and their viability tested by germination and tetrazolium tests at 6 month intervals for 2·5 years. This direct measure of soil seed survival was compared with indirect estimates from the literature, which use seedling emergence from soil samples to determine seed bank persistence. Published databases were used to explore the generality of the influence of reproductive capacity on seed bank persistence estimates from seedling emergence data. There was no relationship between a species' soil seed survival in the burial experiment and its seed bank persistence estimate from published data using seedling emergence from soil samples. The analysis of complementary data from published databases revealed that while seed bank persistence estimates based on seedling emergence from soil samples are generally correlated with seed production, estimates of seed banks from burial experiments are not. The results can be explained in terms of the seed size–seed number trade-off, which suggests that the higher number of smaller seeds is compensated after germination. Soil seed bank persistence estimates correlated to seed production are therefore not useful for studies on population persistence or community diversity. Confusion of soil seed survival and seed production can be avoided by separate use of soil seed abundance and experimental soil seed survival. Lien pérenne : DOI : 10.1093/aob/mcp148 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=141291
in Annals of Botany > 104 (4) (2009) . - 715-724Saatkamp, A., Affre, L., Dutoit, T., Poschlod, P. 2009. The seed bank longevity index revisited : limited reliability evident from a burial experiment and database analyses. Annals of Botany, 104(4): 715-724.Documents numériques
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