期刊
BOTANY
卷 89, 期 11, 页码 779-785出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/B11-069
关键词
European bison; Bison bonasus; Bialowieza Forest; plant establishment; generative success
资金
- Polish Ministry of Science and Higher Education [N N304 021737, 2 P04F 035 30]
Many studies show large discrepancies between the potential (studied in the greenhouse) and realized (studied in the field) effects of endozoochory. The influence of environmental conditions on the fate of endozoochorically dispersed seeds and subsequent plant establishment is still not well understood. We addressed this issue by studying the viable seed content of the dung of European bison (Bison bonasus L.) by means of seedling germination in the greenhouse and in two forest habitats in Bialowieza Primeval Forest. The number of seedlings and the number of plant species that emerged from 1 L of feces were positively correlated with dung longevity. Generative shoots were produced by plants only in coniferous forest. Their number was positively correlated with dung longevity and with light availability. Germination of seeds from bison feces was higher in coniferous forest than in deciduous forest but did not differ between open- and closed-canopy plots within the same habitat. We conclude that (i) seed germination and plant establishment after endozoochorous dispersal is influenced by dung longevity; (ii) the number of generative shoots produced by endozoochorously dispersed plants is influenced by dung longevity and light availability; (iii) seeds of some plant species, present in dung, stay viable for at least 3 years.
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