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A systematic knowledge of clonal integration is an important step in understanding the ecological implication of clonality. This study focuses on the performance of rhizomatous clonal plants under different situations and we proposed a hypothesis that clonal integration will significantly improve the disturbance and drought resistance ability and the competitive ability of Eremosparton songoricum. In 2009, the experiments were carried out in two natural populations. Rhizome was either severed (S) or not (I) in four treatments that include control (C), drought (D), disturbance (E), and competition (F). The biomass and the root-shoot ratio were compared in different experimental treatments. Under drought and disturbance treatments, the biomass of ramet with severed rhizome was significantly less than that of intact ramets, and both were lower than the samples under the control treatment. The differences in root-shoot ratio were opposite to the biomass in drought and disturbance treatments. The ramet biomass under the competition treatment had the same result as that under the drought and disturbance treatments. However, the root-shoot ratio was highest in FS (competition treatment with severed rhizome) and lowest in FI (competition treatment with intact rhizome) under competition and control treatments. Our results suggest that clonal integration enhances the disturbance and drought resistance ability rather than the competitive ability of Eremosparton songoricum. This may be one of the various reasons why E. songoricum is distributed in sand dunes of droughty conditions with more disturbances but less competition. Integration proved to be important for the species occupying adverse patches. For E. songoricum, the existence of rhizome reduces the impact of environmental stress and improves the fitness in association with its location at the dune.
Czasopismo
Rocznik
Tom
Strony
455--461
Opis fizyczny
Bibliogr. 26 poz.,Rys., tab.,
Twórcy
autor
autor
autor
autor
- Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology Geography, Chinese Academy of Sciences, Urumqi, 830011, P.R. China ; Graduate University of Chinese Academy of Science, Beijing 100049, P.R. China, yinlk@ms.xjb.ac.cn
Bibliografia
- 1. A L.M.S. Jiang D.M. Luo Y.M. 2005 – Study on soil moisture and water balance in processes of dune fixation shrubs development at semi-arid region – J. Soil Water Conserv. 19: 107–110.
- 2. Amsberry L. Baker M.A., Ewanchuk P.J., Bertness M.D. 2000 – Clonal integration and the expansion of Phragmites australis – Ecol. Appl. 10: 1110–1118.
- 3. Bach C.E. 2000 – Effects of clonal integration on response to sand burial and defoliation by the dune plant Ipomoea pes-caprae (Convolvulaceae) – Aust. J. Bot. 48: 159–166.
- 4. Brezina S., Koubek T., Münzbergová Z., Herben T. 2006 – Ecological benefits of integration of Calamagrostis epigejos ramets under field conditions – Flora, 201: 461–467.
- 5. Bullock J.M., Mortimer A.M., Begon M. 1994 – Physiological integration among tillers of Holcus lanatus: age-dependence and responses to clipping and competition – New Phytol. 128: 737–747.
- 6. Chen C.D., Zhang L.Y., Hu W.K. 1983 – The basic characteristics of plant communities, flora and their distribution in the sandy district of Gurbantunggut Desert – Acta Phytoecologica et Geobotanica Sinica, 7: 89–99.
- 7. Chen R.Y., Zhang Y.M., Pan B.R., Wu N., Wang H.L., Nie H.L. 2007 – Relation between disturbance and spatial heterogeneity of soil nitration in Gurbantunggut Desert – J. Desert Res. 27: 257–265.
- 8. Eckert C.G. 1999 – Clonal plant research: proliferation, integration, but not much evolution – Am. J. Bot. 86: 1649–1654.
- 9. Fischer M., van Kleunen M. 2002 – On the evolution of clonal plant life histories – Evol. Ecol. 15: 565–582.
- 10. Herben T. 2004 – Physiological integration affects growth form and competitive ability in clonal plants – Evol. Ecol. 18: 493–520.
- 11. Hutchings M.J., Wijesinghe D.K. 2008 – Performance of a clonal species in patchy environments: Effects of environmental context on yield at local and whole-plant scales – Evol. Ecol. 22: 313–324.
- 12. Liu F.H., Yu F., Ye X., Dong M. 2007 – Clonal integration modifies growth and reproduction of the bunchgrass cleistogenes squar-rosa in nutrient-heterogeneous conditions – Ekol. Bratislava, 26: 352–361.
- 13. Liu H.D., Yu F.H., He W.M., Chu Y., Dong M. 2007 – Are clonal plants more tolerant to grazing than co-occurring non-clonal plants in inlanNiva M., Svensson B.M., Karlsson P.S. 2003 – Nutrient resorption from senescing leaves of the clonal plant Linnaea borealis in relation to reproductive state and resource availability – Funct. Ecol. 17: 438–444.
- 14. Peltzer D.A. 2002 – Does clonal integration improve competitive ability? A test using aspen (Populus tremuloides [Salicaceae]) invasion into prairie – Am. J. Bot. 89: 494–499.
- 15. Pennings S.C., Callaway R.M. 2000 – The advantages of clonal integration under different ecological conditions: a community-wide test – Ecology, 81:709–716.
- 16. Price E.A.C., Marshall C. 1999 – Clonal plants and environmental heterogeneity – Plant. Ecol. 141: 3–7.
- 17. Roiloa S.R., Retuerto R. 2006 – Small-scale heterogeneity in soil quality influences photosynthetic efficiency and habitat selection in a clonal plant – Ann. Bot-London, 98: 1043–1052.
- 18. Stuefer J.F., Gomez S., van Molken T. 2004 – Clonal integration beyond resource sharing: implications for defence signalling and disease transmission in clonal plant networks – Evol. Ecol. 18: 647–667.
- 19. Wang X.Q., Li B.W., Zhang Y.M. 2003 – Stabilization of dune surface and formation of mobile belt at the top of longitudinal dunes in Gurbantonggut Desert, Xinjiang, China – J. Desert Res. 23: 126–131.
- 20. Wang N., Yu F.H., Li P.X., He W.M., Liu F.H., Liu J.M., Dong M. 2008 – Clonal integration affects growth, photosynthetic efficiency and biomass allocation, but not the competitive ability, of the alien invasive Alternanthera philoxeroides under severe stress – Ann. Bot-London, 101: 671–678.
- 21. Xiao Y., Tang J.B., Qing H., Ouyang Y., Zhao Y.J., Zhou C.F., An S.Q. 2010 – Clonal integration enhances flood tolerance of Spartina alterniflora daughter ramets – Aquat. Bot. 92: 9–13.
- 22. Yin L.K., Tan L.X., Wang B. 2006 – Rare and Endangered Higher Plants Endemic to Xinjiang – Xinjiang Scientific and Technical Publishing House, Urumchi.
- 23. Zhang D.Y., Ma W.B., Shi X., Wang J.C., Wang X.Y. 2008 – Distribution and bio-ecological characteristics of Eremosparton songoricum, a rare plant in Gurbantunggut desert – J. Desert Res. 28: 430–436.
- 24. Zhang L.Y., Chen C.D. 2002 – On the general characteristics of plant diversity of Gurbantunggut sandy desert – Acta Ecol. Sin. 22: 1923–1932.
- 25. Zhang L.Y., Hai Y. 2002 – Plant communities excluded in the book of “The Vegetation and Its Utilization in Xijiang” I. The desert plant communities – Arid Land Geog. 25: 84–89.
- 26. Zhang S.J., Zhang X.M., Wang X.M., Hou J.G., Xin R.M., Li J.L. 2005 – The research on soil moisture of shifting dune and fixed dune at fringe of Guibantonggut desert – J. Arid Land Res. Envi. 19: 131–136.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BGPK-3304-2848