Abstract
Plants in a dune environment have a high risk of being denudated by wind or buried by sand. We conducted a field experiment to assess growth and reproductive performance as well as biomass allocation of Artemisia ordosica after denudation and burial. Height growth decreased after denudation, but remained constant after burial; biomass was reduced by severe burial, but not by moderate ones. Vegetative growth measured by current-year generated vegetative branches declined with increasing severity of burial. Reproductive maturity was not affected by either denudation or burial, and reproduction decreased only after severe denudation. After denudation, biomass allocated to reproduction was greatly reduced, as shown by strongly reduced biomass allocation to fruits and whole reproductive branches, but that allocated to current-year vegetative growth was maintained. Biomass allocation to reproduction and vegetative growth remained rather stable after burial. Current-year reproductive-to-vegetative-biomass ratio was lower after denudation than after burial, indicating that vegetative growth was more favored by A. ordosica after denudation. These modifications are adaptive in the fluctuating environment of mobile sand dunes where denudation and burial frequently occur.
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Acknowledgments
We thank Mr. Changyuan Li for assistance with field work and two anonymous reviewers for valuable comments on an early version of the manuscript. This research was supported by NSFC (30770357), the National Key Basic Research Program of China (2007CB106802) and a CAS-KNAW joint PhD Training Program.
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Li, SL., Zuidema, P.A., Yu, FH. et al. Effects of denudation and burial on growth and reproduction of Artemisia ordosica in Mu Us sandland. Ecol Res 25, 655–661 (2010). https://doi.org/10.1007/s11284-010-0699-x
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DOI: https://doi.org/10.1007/s11284-010-0699-x