Influence of pollination and seed dispersal on the genetic population structure of two Commiphora species in Madagascar and South Africa [Elektronische Ressource] / Friederike A. Voigt

“Influence of pollination and seed dispersal on the genetic population structure of two Commiphora species in Madagascar and South Africa” Dissertation zur Erlangung des Grades Doktor der Naturwissenschaften Am Fachbereich Biologie der Johannes Gutenberg-Universität in Mainz Friederike A. Voigt geb. am 03.05.1974 in Karlsruhe Mainz, den 01.03.2005 Kapitel 1 dieser Arbeit wurde veröffentlicht bei Cambridge University Press unter: Voigt, F.A., S. Jung, N. Farwig and K. Böhning-Gaese (2005) Low fruit set in a dioecious tree: pollination ecology of Commiphora harveyi in South Africa. Journal of Tropical Ecology 21. …dedicated to the arofys and the paperbarks and the mysterious beauty of tropical forests. CONTENTS 1 ABSTRACT OF THE THESIS 1 2 GENERAL INTRODUCTION 3 2.1 POLLINATION 3 2.2 PN AND SEED DISPERSAL AND THEIR CONSEQUENCES FOR THE GENETIC STRUCTURE OF PLANT POPULATIONS 4 2.3 BACKGROUND OF THE THESIS 5 2.4 AIMS OF THE THESIS 6 3 LOW FRUIT SET IN A DIOECIOUS TREE: POLLINATION ECOLOGY OF COMMIPHORA HARVEYI IN SOUTH AFRICA 9 3.1 INTRODUCTION 9 3.2 METHODS 10 3.2.1 STUDY SITE 10 3.2.2 STUDY SPECIES 11 3.2.3 FLORAL DISPLAY 3.2.4 FLOWER VISITORS 12 3.2.5 POLLINATION EXPERIMENTS AND FRUIT SET 13 3.2.6 COMPARISON WITH C. GUILLAUMINII 14 3.3 RESULTS 14 3.3.1 FLORAL DISPLAY 15 3.3.2 FLOWER VISITORS 3.3.3 VISITATION RATES 15 3.3.4 DAILY PATTERN 18 3.3.