inscription
Portail d'information géographique

Résultats de la recherche (11 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
Association of flower and pollinator activity in the Negev Desert, Israel
  • Association of flower and pollinator activity in the Negev Desert, Israel
  • The objetives of this study were to investigate the following aspects of flower-pollinator plant relationships, in a desert environment: 1) synchronization of flower and pollinator activity; 2) flower - pollinator association, i.e., the floral
  • morphological groups any pollinator group foraged at.
Phenology and pollination ecology of the desert plant Moricandia nitens (Brassicaceae) in the Negev, Israel
  • Phenology and pollination ecology of the desert plant Moricandia nitens (Brassicaceae) in the Negev, Israel
  • The phenology and pollination biology of the desert plant Moricandia nitens with long-tubed flowers was studied in Advat, Central Negev. Reproduction of M. nitens, being a self-incompatible and obligate outcrosser, is dependent on insects which
  • visit their flowers. Its high reproductive success is due to efficient bee pollination.
Impatiens of Africa. Morphology, pollination and pollinators, ecology, phytogeography, hybridisation, keys and a systematic treatment of all African species. With a note on collecting and cultivation.
  • Impatiens of Africa. Morphology, pollination and pollinators, ecology, phytogeography, hybridisation, keys and a systematic treatment of all African species. With a note on collecting and cultivation.
Voprosy semennogo razmnozenija osnovnyh lesoobrazujuscih porod pustyn' Srednej Azii Production en masse de semences sélectionnées des principales essences forestières dans les déserts de l'Asie Moyenne soviétique
  • of pollination : xenogamy, geitonogamy, autogamy. They are realized entomophilously and anemophilously. Lability of these types and methods of pollination is considered as adaptation to extremum conditions of life. - (L'A.).
Predicting days of high allergenic risk during Betula pollination using weather types
  • Predicting days of high allergenic risk during Betula pollination using weather types
Pollination studies in Thymus vulgaris L. (Labiatae)
  • Pollination studies in Thymus vulgaris L. (Labiatae)
Follow the flowers : the itinerant bee-keepers of China
  • Although bee keeping and honey production are not long traditions in China, many people from four provinces now move with their hives to find honey sources in flowering plants and to pollinate crops. Two thirds of the honey in China is exported
Le Tyrrhénien de Tunisie: essai de synthèse
  • correlated with pollinic diagrams and deep sea cores.
La formation de la frontière actuelle entre la Russie et la Finlande
  • POLIN, A.K.
Savannas
  • and diverse roles in savanna functioning as pollinators, dispersers, nutrient recyclers and consumers.
Pollen analysis of the 1973 ice core from Devon Island glacier, Canada
  • were blown a minimum of 1000 km from low arctic shrub tundra and adjacent subarctic Picea (spruce) forest| these areas were dominated by the arctic air mass during the summer pollinating season. During the Wisconsinan-early Holocene, glacier ice