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Dynamics of Seed Bank and Survivorship of Meadow Salsify (Tragopogon pratensis) Populations

Published online by Cambridge University Press:  12 June 2017

Meiqin Qi ,
Mahesh K. Upadhyaya  and
Roy Turkington
Meiqin Qi
Affiliation:
Dep. Plant Sci., Univ. of British Columbia, Vancouver, B.C. V6T 1Z4, Canada
Mahesh K. Upadhyaya
Affiliation:
Dep. Plant Sci., Univ. of British Columbia, Vancouver, B.C. V6T 1Z4, Canada
Roy Turkington
Affiliation:
Dep. Bot., Univ. of British Columbia, Vancouver, B.C. V6T 1Z4, Canada
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Abstract

Seasonal changes in germination behaviour of meadow salsify seeds buried at different depths, and survivorship of seed and plant populations were investigated. Freshly matured seeds were mixed with sterilized soil, placed into nylon mesh bags, and buried at three soil depths in a meadow salsify-infested rangeland. Two germination peaks were observed: one in the fall, 2 to 3 mo after burial, and a second the following spring. Burial depth affected seed dormancy. The number of seeds with enforced dormancy, and innate or induced dormancy, increased with burial depth in the 1989 cohort, and the number with enforced dormancy increased in the 1990 cohort. Burial depth also affected seed survivorship. The survivorship curves for 1989 and 1990 seed cohorts were not different as indicated by the Logrank test. The seed population was nearly depleted after 9 to 10 mo of burial; less than 3 % of the buried seeds remained viable after 13 mo. About 50% of the plants monitored in a natural meadow salsify population in 1990 died before winter, and an additional 35% died during winter. The mortality of the remaining plants during the second growing season was very low. Only 12% of the 1990 cohort remained in October 1991. Mortality of meadow salsify plants was density-independent.

Keywords

Meadow salsify, Tragopogon pratensis L., ♯ TROPRMeadow goat's-beardweedseed dormancyTROPR
Type
Weed Biology and Ecology
Information
Weed Science , Volume 44 , Issue 1 , March 1996 , pp. 100 - 108
Copyright
Copyright © 1996 by the Weed Science Society of America 

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References

Literature Cited

1. Baskin, J. M. and Baskin, C. C. 1989. Germination responses of buried seeds of Capsella bursa-pastoris exposed to seasonal temperature changes. Weed Res. 29: 205–212.Google Scholar
2. Baskin, J. M. and Baskin, C. C. 1990. Seed germination ecology of poison hemlock, Conium maculatum . Can. J. Bot. 68: 2018–2024.CrossRefGoogle Scholar
3. Bouwmeester, H. J. and Karssen, C. M. 1989. Environmental factors influencing the expression of dormancy patterns in weed seeds. Ann. Bot. 63: 113–120.Google Scholar
4. Cavers, P. B. 1983. Seed demography. Can. J. Bot. 61: 3578–3590.CrossRefGoogle Scholar
5. Cavers, P. B. and Benoit, D. L. 1989. Seed banks in arable land. Pages 309–328 in Leck, M. A., Parker, V. T., and Simpson, R. L., eds. Ecology of soil seed banks. Academic Press, Inc. Google Scholar
6. Colosi, J. C., Cavers, P. B., and Bough, M. A. 1988. Dormancy and survival in buried seeds of proso millet (Panicum miliaceum). Can. J. Bot. 66: 161–168.Google Scholar
7. Cresswell, E. G. and Grime, J. P. 1981. Induction of a light requirement during seed development and its ecological consequences. Nature 291: 583–585.Google Scholar
8. Eberlein, C. V. 1987. Germination of Sorghum almum seeds and longevity in soil. Weed Sci. 35: 796–801.Google Scholar
9. Froud-Williams, R. J., Chancellor, R. J., and Drennan, D.S.H. 1984. The effects of seed burial and soil disturbance on emergence and survival of arable weeds in relation to minimal cultivation. J. Appl. Ecol. 21: 629–641.Google Scholar
10. Grime, J. P., Mason, G., Curtis, A. V., Rosman, J., Band, S. R., Mowforth, M.A.G., Neal, A. M., and Shaw, S. 1981. A comparative study of germination characteristics in a local flora. J. Ecol. 69: 1017–1059.Google Scholar
11. Hutchings, M. J. 1986. Plant population biology. Pages 377–435 in Moore, P. D. and Chapman, S. B., eds. Methods in plant ecology. Blackwell Sci. Publ., Oxford.Google Scholar
12. Hutchings, M. J., Booth, K. D., and Waite, S. 1991. Comparison of survivorship by the Logrank test: criticisms and alternatives. Ecol. 72: 2290–2293.Google Scholar
13. Kropác, Z. 1966. Estimation of weed seeds in arable soils. Pedobiologia 6: 105–128.Google Scholar
14. Law, R. 1981. The dynamics of a colonizing population of Poa annua . Ecol. 62: 1267–1277.Google Scholar
15. Moore, R. P. 1972. Tetrazolium staining for assessing seed quality. Pages 347–366 in Heydecker, W., ed. Seed ecology: Proceedings of the 19th Easter school in agriculture science. Butterworths, London.Google Scholar
16. Parker, V. T., Simpson, R. L., and Leek, M. A. 1989. Pattern and process in the dynamics of seed banks. Pages 367–384 in Leck, M. A., Parker, V. T., and Simpson, R. L., eds. Ecology of soil seed banks. Academic Press, Inc. Google Scholar
17. Pyke, D. A. and Thompson, J. N. 1986. Statistical analysis of survival and removal rate experiments. Ecol. 67: 240–245.Google Scholar
18. Qi, M.Q. 1993. Seed ecophysiology and plant population ecology of Cynoglossum officinale L. and Tragopogon spp. , University of British Columbia, Vancouver, B.C. Canada. 166 pp.Google Scholar
19. Qi, M. Q. and Upadhyaya, M. K. 1993. Seed germination ecophysiology of meadow salsify (Tragopogon pratensis) and western salsify (T. dubius). Weed Sci. 41: 362–368.Google Scholar
20. Roberts, H. A. 1981. Seed banks in soils. Adv. Appl. Biol. 6: 1–55.Google Scholar
21. Roberts, H. A. 1986. Seed persistence in soil and seasonal emergence in plant species from different habitats. J. Appl. Ecol. 23: 639–656.Google Scholar
22. Sagar, G. R. and Mortimer, A. M. 1976. An approach to the study of the population dynamics of plants with special reference to weeds. Appl. Biol. 1: 1–47.Google Scholar
23. Upadhyaya, M. K., Qi, M. Q., Furness, N. H., and Cranston, R. 1993. Meadow goat's-beard and western goat's-beard—two rangeland weeds of British Columbia. Rangelands 15: 148–149.Google Scholar
24. Venable, D. L. 1989. Modeling the evolutionary ecology of seed banks. Pages 67–87 in Leck, M. A., Parker, V. T., and Simpson, R. L., eds. Ecology of soil seed banks. Academic Press, Inc. Google Scholar
25. Weaver, S. E. and Cavers, P. B. 1979. Dynamics of seed populations of Rumex crispus and R. obtusifolius (Polygonaceae) in disturbed and undisturbed soil. J. Appl. Ecol. 16: 909–917.CrossRefGoogle Scholar