Pollination of Nymphaea lotus (Nymphaeaceae) by Rhinoceros Beetles and Bees in the Northeastern Ivory Coast

Abstract

Detailed observations of the pollination biology of Nymphaea lotus were conducted by studying populations growing in seasonal ponds in the Comoé National Park (NE Ivory Coast). Flowers of N. lotus are protogynous and anthesis lasts for 4 to 5 days. Flowers open at sunset and close in the morning hours, thereby revealing a high variability in timing. For the first time, heat production in flowers could be observed in the genus Nymphaea. Flowers of N. lotus were visited by Ruteloryctes morio, an endemic dynastid beetle during the night. Beetles copulated in the flowers and fed on flower parts, but were less effective pollinators than several bee species that visited flowers in the early morning. Nymphaea lotus thus seems to be adapted to pollination by both nocturnal beetles and diurnal bees.

Nymphaeaceae - Dynastinae - Hymenoptera - pollination - heat production - reproduction.

References

• 1 Bernhardt P.. Convergent evolution and adaptive radiation of beetle-pollinated angiosperms.  Plant Syst. Evol.. (2000);  222 293-320
• 2 Borsch T.. Phylogeny and evolution of the genus Nymphaea (Nymphaeaceae). Bonn; Diss. (2000)
• 3 Borsch T., Hilu K. W., Wilde V., Barthlott W.. Phylogenetic analysis of noncoding chloroplast DNA sequences reveals Amborella as basalmost angiosperm.  Am. J. Bot.. (2000);  87 (Suppl. 6) 115-116
• 4 Capperino M. E., Schneider E. L.. Floral biology of Nymphaea mexicana Zucc. (Nymphaeaceae).  Aquat. Bot.. (1985);  23 83-93
• 5 Conard H. S.. The waterlilies, a monograph of the genus Nymphaea. .  Publ. Carnegie Inst. Wash.. (1905);  4 1-79
• 6 Cramer J. M., Meeuse A. D. J., Teunissen P. A.. A note on the pollination of nocturnally flowering species of Nymphaea. .  Acta Bot. Neerl.. (1975);  24 489-490
• 7 Decelle J.. Contributions à la connaissance de la faune entomologique de la Côte-d'Ivoire. Musée Royal de l'Afrique Centrale, Belgique Annales 8,.  Sciences Zoologiques. (1968);  165 1-463
• 8 Doyle J. A., Endress P. K.. Morphological phylogenetic analysis of basal angiosperms: comparison and combination with molecular data.  Int. J. Plant Sci.. (2000);  161 (Suppl. 6) 121-153
• 9 Endress P. K.. The flowers in extant basal angiosperms and inferences on ancestral flowers.  Int. J. Plant Sci.. (2001);  162 1111-1140
• 10 Endrödi S.. Monographie der Dynastinae (Coleoptera: Lamellicornia). I. Teil.  Entomol. Abh. Mus. Tierk.. (1966);  33 1-460
• 11 Gottsberger G.. The reproductive biology of primitive angiosperms.  Taxon. (1988);  37 630-643
• 12 Gottsberger G.. Bestäubungsbiologie altertümlicher Bedecktsamer (Angiospermen). Zizka, G. and Schneckenburger, S., eds. Blütenökologie - faszinierendes Miteinander von Pflanzen und Tieren. Kl. Senckenberg-Reihe Nr. 33, Palmengarten Sonderheft Nr. 31. Frankfurt am Main; Waldemar Kramer (1999): 118-124
• 13 Gottsberger G., Silberbauer-Gottsberger I.. Olfactory and visual attraction of Erioscelis emarginata (Cyclocephalini, Dynastinae) to the inflorescences of Philodendron selloum (Araceae).  Biotropica. (1991);  23 23-28
• 14 Graham S. W., Reeves P. A., Burns A. C. E., Olmstead R. G.. Microstructural changes in noncoding chloroplast DNA: interpretation, evolution, and utility of indels and inversions in basal angiosperm phylogenetic inference.  Int. J. Plant Sci.. (2000);  161 (Suppl. 6) 83-96
• 15 Khedr A. H., Hegazy A. K.. Ecology of the rampant weed Nymphaea lotus L. Willdenow in natural and ricefield habitats of the Nile delta, Egypt.  Hydrobiologia. (1998);  386 119-129
• 16 Krell F.-T., Hirthe G., Seine R., Porembski S.. Rhinoceros beetles pollinate water lilies in Africa (Coleoptera: Scarabaeidae: Dynastinae; Magnoliidae: Nymphaeaceae).  Ecotropica. (2003);  in press
• 17 Meeuse B. J. D., Schneider E. L.. Nymphaea revisited: a preliminary communication.  Isr. J. Bot.. (1980);  28 65-79
• 18 Prance G. T., Anderson A. B.. Studies of the floral biology of neotropical Nymphaeaceae.  3. Acta Amazonica. (1976);  6 163-170
• 19 Prance G. T., Arias J. R.. A study of the floral biology of Victoria amazonica (Poepp.) Sowerby (Nymphaeaceae).  Acta Amazonica. (1975);  5 109-139
• 20 Schatz G. E.. Some aspects of pollination biology in Central American forests. 69 - 84. Bawa, K. S. and Hadley, M., eds. Reproductive Ecology of Tropical Forest Plants , Man and the Biosphere Series, 7. Paris; UNESCO (1990)
• 21 Schneider E. L.. Notes on the floral biology of Nymphaea elegans (Nymphaeaceae) in Texas.  Aquatic Bot.. (1982 a);  12 197-200
• 22 Schneider E. L.. Observations on the pollination biology of Nymphaea gigantea W. J. Hooker (Nymphaeaceae).  W. Austral. Naturalist. (1982 b);  15 71-72
• 23 Schneider E. L., Chaney T.. The floral biology of Nymphaea odorata (Nymphaeaceae).  Southw. Naturalist. (1981);  26 159-165
• 24 Schneider E. L., Williamson P. S.. Nymphaeaceae. Kubitzki, K., Rohwer, J. G., and Bittrich, V., eds. The Families and Genera of Vascular Plants, 2. Flowering Plants. Magnoliid, Hamamelid and Caryophyllid families. New York, Berlin; Springer-Verlag (1993): 486-493
• 25 Soltis P. S., Soltis D. E., Zanis M. J., Kim S.. Basal lineages of angiosperms: relationships and implications for floral evolution.  Int. J. Plant Sci.. (2000);  161 (6 Suppl.) 97-107
• 26 Valla J. J., Cirino D. R.. Biologia floral del irupé, Victoria cruziana D'Orb.  Darwinia. (1972);  17 477-498
• 27 Van der Velde G., Brock T. C. M., Heine M., Peeters P. M. P. M.. Flowers of Dutch Nymphaeaceae as a habitat for insects.  Acta Bot. Neerl.. (1978);  27 429-430
• 28 Van der Velde G.. Developmental stages in the floral biology s.l. of Dutch Nymphaeaceae (Nymphaea alba L., Nymphaea candida Presl, Nuphar lutea [L.] Sm.).  Acta Bot. Neerl.. (1986);  35 111-113
• 29 Wiersema J. H.. Distributional records for Nymphaea lotus (Nymphaeaceae) in the western hemisphere.  Sida. (1982);  9 230-234
• 30 Wiersema J. H.. A monograph of Nymphaea subgenus Hydrocallis (Nymphaeaceae).  Syst. Bot. Monogr.. (1987);  16 1-112
• 31 Wiersema J. H.. Reproductive biology of Nymphaea (Nymphaeaceae).  Ann. Miss. Bot. Gard.. (1988);  75 795-804

Section Editor: W. H. van der Putten