Journalartikel

Jahr der Veröffentlichung: 1994

Seiten: 203-218

Zeitschrift: Phyton: Annales rei Botanicae

Bandnummer: 34

Heftnummer: 2

ISSN: 0079-2047

Verlag: Institut für Biologie, Universität Graz, Austria) und Verlag Ferdinand Berger

Abstract: 
Five Ranunculus species, R. acris, R. auricomus, R. bulbosus, R. flammula and R. repens were studied in respect to phenology and pollination biology at several places in their natural habitats around Giessen, Central Germany and at garden-beds of the Giessen University in 1989. Population phenology was compared with weather conditions. For R. auricomus, R. bulbosus, and R. acris quite distinct phenology was observed at the two sites, with a much longer flowering period at the bed site. Differences in longevity of individual flowers were observed, even within the same species. In R. acris and R. bulbosus, early and late flowers of the flowering period lasted more than twice as long as flowers from the middle of the flowering period. In R. flammula this situation was inverted. Flower visiting insects, belonging mainly to the Diptera, Hymenoptera, and Coleoptera, varied considerably in the natural habitats and at the bed sites. Frequency of flower visiting at the natural sites was highest in R. flammula (45 insects per hour), followed by R. acris (12), and R. bulbosus (8). R. repens has a strong vegetative propagation by runners in addition to generative reproduction, and R. auricomus has asexual (apomictic) reproduction in addition to generative reproduction. The two latter species showed a flower visitation frequency of only 6 and 4 insects per hour, respectively. The great variety of flower visiting insects and the substitution of insect species at different sites are an expression of a generalistic pollination syndrome of the studied Ranunculus species.

Harvard-Zitierstil: STEINBACH, K. and GOTTSBERGER, G. (1994) PHENOLOGY AND POLLINATION BIOLOGY OF 5 RANUNCULUS SPECIES IN GIESSEN, CENTRAL GERMANY, Phyton: Annales rei Botanicae , 34(2), pp. 203-218

APA-Zitierstil: STEINBACH, K., & GOTTSBERGER, G. (1994). PHENOLOGY AND POLLINATION BIOLOGY OF 5 RANUNCULUS SPECIES IN GIESSEN, CENTRAL GERMANY. Phyton: Annales rei Botanicae . 34(2), 203-218.