Experimental sand burial affects seedling survivorship, morphological
traits, and biomass allocation of <i>Ulmus pumila</i> var. <i>sabulosa</i> in the Horqin Sandy Land, China
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Published:2016-07-18
Issue:4
Volume:7
Page:1085-1094
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ISSN:1869-9529
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Container-title:Solid Earth
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language:en
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Short-container-title:Solid Earth
Author:
Tang Jiao, Busso Carlos Alberto, Jiang Deming, Musa Ala, Wu Dafu, Wang YongcuiORCID, Miao Chunping
Abstract
Abstract. As a native tree species, Ulmus pumila var. sabulosa (sandy elm) is widely distributed in the Horqin Sandy Land, China. However, seedlings of this species have to withstand various depths of sand burial after emergence because of increasing soil degradation, which is mainly caused by overgrazing, climate change, and wind erosion. An experiment was conducted to evaluate the changes in its survivorship, morphological traits, and biomass allocation when seedlings were buried at different burial depths: unburied controls and seedlings buried vertically up to 33, 67, 100, or 133 % of their initial mean seedling height. The results showed that partial sand burial treatments (i.e., less than 67 % burial) did not reduce seedling survivorship, which still reached 100 %. However, seedling mortality increased when sand burial was equal to or greater than 100 %. In comparison with the control treatment, seedling height and stem diameter increased at least by 6 and 14 % with partial burial, respectively. In the meantime, seedling taproot length, total biomass, and relative mass growth rates were at least enhanced by 10, 15.6, and 27.6 %, respectively, with the partial sand burial treatment. Furthermore, sand burial decreased total leaf area and changed biomass allocation in seedlings, partitioning more biomass to aboveground organs (e.g., leaves) and less to belowground parts (roots). Complete sand burial after seedling emergence inhibited its re-emergence and growth, even leading to death. Our findings indicated that seedlings of sandy elm showed some resistance to partial sand burial and were adapted to sandy environments from an evolutionary perspective. The negative effect of excessive sand burial after seedling emergence might help in understanding failures in recruitments of sparse elm in the study region.
Funder
National Natural Science Foundation of China
Publisher
Copernicus GmbH
Subject
Paleontology,Stratigraphy,Earth-Surface Processes,Geochemistry and Petrology,Geology,Geophysics,Soil Science
Reference70 articles.
1. Bazzaz, F. A.: Allocation of Resources in Plants: State of the Science and Critical Questions, in: Plant Resource Allocation, Academic Press, San Diego, 1997. 2. Belcher, C. R.: Effect of sand cover on the survival and vigor of Rosa rugosa Thunb, Int. J. Biometeorol., 21, 276–280, 1977. 3. Bellamy, P. H., Loveland, P. J., Bradley, R. I., Lark, R. M., and Kirk, G. J. D.: Carbon losses from all soils across England and Wales 1978–2003, Nature, 437, 245–248, 2005. 4. Berendse, F., van Ruijven, J., Jongejans, E., and Keesstra, S.: Loss of Plant Species Diversity Reduces Soil Erosion Resistance, Ecosystems, 18, 881–888, 2015. 5. Borreli, P., Panagos, P., Ballabio, C., Lugato, E., Weynants, M., and Montanaalla, L.: Towards a Pan-European assessment of land susceptibiity to wind erosion, Land Degrad. Dev., 27, 1093–1105, 2016.
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