CBNPMP

Portail documentaire

Accueil

Accès réservé CBNPMP

Mot de passe oublié ?

Aide à la connexion

Adresse

CBNPMP
Vallon de Salut
65200 Bagnères-de-Bigorre
France
05.62.95.85.30
contact

Nouvelle recherche

Article: Imprimé

Effects of local density on pollination and reproduction in Delphinium nuttallianum and Aconitum columbianum (Ranunculaceae) / Maria Bosch in American Journal of Botany, 86 (6) (06/1999)

article (1999)

[article]
inAmerican Journal of Botany > 86 (6) (06/1999) . - 871-879

Titre :	Effects of local density on pollination and reproduction in Delphinium nuttallianum and Aconitum columbianum (Ranunculaceae)
Type de document :	Imprimé
Auteurs :	Maria Bosch ; Nickolas Merritt Waser (1948-)
Année de publication :	1999
Article en page(s) :	871-879
Langues :	Anglais (eng)
Catégories :	[CBNPMP-Thématique] Pollinisateur
Mots-clés :	Delphinium sp. Aconitum
Résumé :	Plant populations vary in density both naturally and as a consequence of anthropogenic impacts. Density in turn can influence pollination by animals. For example, plants in dense populations might enjoy more frequent visitation if pollinators forage most efficiently in such populations. We explored effects of plant density on pollination and seed set in the larkspur Delphinium nuttallianum and monkshood Aconitum columbianum. At our site in the Colorado Rocky Mountains, flowers of D. nuttallianum are pollinated primarily by queen bumble bees, solitary bees, and hummingbirds, whereas those of A. columbianum are pollinated primarily by queen and worker bumble bees. We found that the quantity of pollination service to both species (pollinator visitation rate and pollen deposition) was at best weakly related to density. In contrast, seed set declined by approximately one-third in sparse populations relative to nearby dense populations. This decline may stem from the receipt of low-quality pollen, for example, inbred pollen. Alternatively, sparsity may indicate poor environmental conditions that lower seed set for reasons unrelated to pollination. Our results demonstrate the value of simultaneously exploring pollinator behavior, pollen receipt, and seed set in attempting to understand how the population context influences plant reproductive success.
Permalink :	https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=137836

Documents numériques

article (1999) - URL

article (1999)

URL

Les cookies assurent le bon fonctionnement de nos services, en utilisant ces derniers, vous acceptez l'utilisation des cookies. En savoir plus