| Titre : | Effect of microhabitat on seed fate and seedling performance in two rodent-dispersed tree species in rain forest in french Guiana | | Type de document : | texte imprimé | | Auteurs : | P.M. Forget | | Editeur : | British Ecological Society | | Année de publication : | 1997 | | Collection : | Journal of Ecology num. 85, 85 | | Importance : | pp. 693-703., 3 tabl., 4 graph., 34 réf.-p. 693-703 | | Langues : | Anglais (eng) | | Catégories : | Autres descripteurs
BIOMASS ALLOCATION ; FOREST GAP ; RECRUITMENT ; SEEDLING SURVIVOR-SHIP ; SEED DISPERSAL ; SCATTERHOARDING ; CARAPA PROCERA ; VOUACAPOUA AMERICANA
Thésaurus Agrovoc
Forêt tropicale humide ; Dissémination des graines ; Guyane française ; Amazonie
| | Résumé : | The establishment probabilities, short-term survival, growth rates and biomass allocation patterns of seedlings in two large-seeded tree species, Carapa procera (Meliaceae) and Vouacapoua americana (Caesalpiniaceae), were studied in contrasting microhabitats at Paracou, French Guiana. 2 Seeds (100 per habitat per species) were buried to simulate rodent caches into gap and understorey microhabitats (n = 20 of each) surrounding mature parent trees. The experiment was replicated in Carapa procera (in early March and May) to investigate the effect of temporal variation in seed dispersal on the establishment process. 3 Surviving seeds and sprouting seedlings were repeatedly censused during 2 years after establishment, and the causes of mortality determined. Growth and biomass parameters were calculated for surviving seedlings after 2.5 years. 4 A greater proportion of seeds and germinating seedlings were dug up but less seedlings suffered from damping-off in C.
procera than in V. americana. For both species, short-term survival of seedlings was lower in the understorey where predation by mammals and damping-off occured more frequently than in gaps. 5 Damping off killed more Carapa procera seedlings when buried in Match than in May. whercas mammal predation caused more deaths in May planted seeds. 6 Although survival and growth were enhanced in gaps for both species, seeds and seedlings were much more intolérant to the understorey microhabitat in Carapa procera (almost 100% mortality in shaded habitat) than in Vouacapoua amricana. 7 Seedling biomass allocation was consistent with previous data for large-seeded species but differed markedly between the two study species. (Résumé Scannérisé) | | Type de document : | Tiré à part | | Permalien de la notice : | https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=149465 |
Effect of microhabitat on seed fate and seedling performance in two rodent-dispersed tree species in rain forest in french Guiana [texte imprimé] / P.M. Forget . - British Ecological Society, 1997 . - pp. 693-703., 3 tabl., 4 graph., 34 réf.-p. 693-703. - ( Journal of Ecology; 85, 85) . Langues : Anglais ( eng) | Catégories : | Autres descripteurs
BIOMASS ALLOCATION ; FOREST GAP ; RECRUITMENT ; SEEDLING SURVIVOR-SHIP ; SEED DISPERSAL ; SCATTERHOARDING ; CARAPA PROCERA ; VOUACAPOUA AMERICANA
Thésaurus Agrovoc
Forêt tropicale humide ; Dissémination des graines ; Guyane française ; Amazonie
| | Résumé : | The establishment probabilities, short-term survival, growth rates and biomass allocation patterns of seedlings in two large-seeded tree species, Carapa procera (Meliaceae) and Vouacapoua americana (Caesalpiniaceae), were studied in contrasting microhabitats at Paracou, French Guiana. 2 Seeds (100 per habitat per species) were buried to simulate rodent caches into gap and understorey microhabitats (n = 20 of each) surrounding mature parent trees. The experiment was replicated in Carapa procera (in early March and May) to investigate the effect of temporal variation in seed dispersal on the establishment process. 3 Surviving seeds and sprouting seedlings were repeatedly censused during 2 years after establishment, and the causes of mortality determined. Growth and biomass parameters were calculated for surviving seedlings after 2.5 years. 4 A greater proportion of seeds and germinating seedlings were dug up but less seedlings suffered from damping-off in C.
procera than in V. americana. For both species, short-term survival of seedlings was lower in the understorey where predation by mammals and damping-off occured more frequently than in gaps. 5 Damping off killed more Carapa procera seedlings when buried in Match than in May. whercas mammal predation caused more deaths in May planted seeds. 6 Although survival and growth were enhanced in gaps for both species, seeds and seedlings were much more intolérant to the understorey microhabitat in Carapa procera (almost 100% mortality in shaded habitat) than in Vouacapoua amricana. 7 Seedling biomass allocation was consistent with previous data for large-seeded species but differed markedly between the two study species. (Résumé Scannérisé) | | Type de document : | Tiré à part | | Permalien de la notice : | https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=149465 |
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Ajouter le résultat dans votre panier Faire une suggestion Affiner la recherche Interroger des sources externesDynamics of the seedling shadow of a frugivore-dispersed tree species in french Guiana / P.M. Forget (1997)
