THE INFLUENCE OF DEER BROWSING ON THE REPRODUCTIVE-BIOLOGY OF CANADA YEW (TAXUS-CANADENSIS MARSH) .2. POLLEN LIMITATION - AN INDIRECT EFFECT

被引:36
作者
ALLISON, TD
机构
[1] UNIV MINNESOTA,DEPT ECOL & BEHAV BIOL,MINNEAPOLIS,MN 55455
[2] UNIV MINNESOTA,BELL MUSEUM NAT HIST,MINNEAPOLIS,MN 55455
关键词
Herbivory; Indirect effects; Plant; Pollen limitation; Taxus;
D O I
10.1007/BF00317205
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Hand-pollination significantly increased seed production in a Canada yew (Taxus canadensis) population that had been browsed previously by white-tailed deer (Odocoileus virginianus) indicating that pollen availability limited seed production in this population. Handpollination did not significantly increase seed production in a population never browsed by deer. Deer-browsing significantly reduces yew density and pollen production, which in turn results in reduced pollination and seed production. Pollen limitation of yew seed production is an indirect effect of deer browsing on Canada yew and results from an interaction between the direct effect of deer browsing and the pollination syndrome of Canada yew. Artificially created female yews had lower seed set than monoecious yews when yew seed production was pollen-limited, but not when pollen did not limit seed production. © 1990 Springer-Verlag.
引用
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页码:530 / 534
页数:5
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