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Pollen dispersal distances for a conifer canopy species in the Knysna Forest






South African Journal of Botany 55(6): 662-663

Pollen dispersal distances for a conifer canopy species in the Knysna Forest

No data are available on pollen flow distances for wind-pollinated canopy trees in broad-leaf, closed, evergreen forests. Nevertheless, major biogeographic patterns, such as the relative absence of anemophilic tree species in lowland tropical forests and the rise of the angiosperms, have been explained in terms of the supposed relative ineffeciency of anemophily compared to zoophily. In this study, fruits were found below females of the dioecious anemophilous tree species Podocarpus falcatus in the Knysna Forest, which were up to 70 m from male trees. This pollen flow is overmore than twice the distance previously suggested as a maximum and indicates that wind-pollinated species could produce out-crossed progeny in species-rich communities.

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Accession: 001912461

DOI: 10.1016/s0254-6299(16)31137-1



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