Research article |
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Spatiotemporal characteristics of seed rain and soil seed bank of artificial Caragana korshinskii Kom. forest in the Tengger Desert, China |
SHEN Jianxiang1,2, WANG Xin3, WANG Lei1,2,*(), WANG Jiahui1,2, QU Wenjie1,2, ZHANG Xue1,2, CHANG Xuanxuan3, YANG Xinguo1,2, CHEN Lin1,2, QIN Weichun3, ZHANG Bo3, NIU Jinshuai3 |
1College of Ecological Environment, Ningxia University, Yinchuan 750021, China 2Key Laboratory of Restoration and Reconstruction of Degraded Ecosystems in Northwest China, Ministry of Education, Ningxia University, Yinchuan 750021, China 3College of Agriculture, Ningxia University, Yinchuan 750021, China |
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Abstract Vegetation restoration and reconstruction are effective approaches to desertification control and achieving social and economic sustainability in desert areas. However, the self-succession ability of native plants during the later periods of vegetation restoration remains unclear. Therefore, this study was conducted to bridge the knowledge gap by investigating the regeneration dynamics of artificial forest under natural conditions. The information of seed rain and soil seed bank was collected and quantified from an artificial Caragana korshinskii Kom. forest in the Tengger Desert, China. The germination tests were conducted in a laboratory setting. The analysis of species quantity and diversity in seed rain and soil seed bank was conducted to assess the impact of different durations of sand fixation (60, 40, and 20 a) on the progress of vegetation restoration and ecological conditions in artificial C. korshinskii forest. The results showed that the top three dominant plant species in seed rain were Echinops gmelinii Turcz., Eragrostis minor Host., and Agropyron mongolicum Keng., and the top three dominant plant species in soil seed bank were E. minor, Chloris virgata Sw., and E. gmelinii. As restoration period increased, the density of seed rain and soil seed bank increased first and then decreased. While for species richness, as restoration period increased, it gradually increased in seed rain but decreased in soil seed bank. There was a positive correlation between seed rain density and soil seed bank density among all the three restoration periods. The species similarity between seed rain or soil seed bank and aboveground vegetation decreased with the extension of restoration period. The shape of the seeds, specifically those with external appendages such as spines and crown hair, clearly had an effect on their dispersal, then resulting in lower seed density in soil seed bank. In addition, precipitation was a crucial factor in promoting rapid germination, also resulting in lower seed density in soil seed bank. Our findings provide valuable insights for guiding future interventions during the later periods of artificial C. korshinskii forest, such as sowing and restoration efforts using unmanned aerial vehicles.
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Received: 08 November 2023
Published: 30 April 2024
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Corresponding Authors:
*WANG Lei (E-mail: WL8999@163.com)
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Cite this article:
SHEN Jianxiang, WANG Xin, WANG Lei, WANG Jiahui, QU Wenjie, ZHANG Xue, CHANG Xuanxuan, YANG Xinguo, CHEN Lin, QIN Weichun, ZHANG Bo, NIU Jinshuai. Spatiotemporal characteristics of seed rain and soil seed bank of artificial Caragana korshinskii Kom. forest in the Tengger Desert, China. Journal of Arid Land, 2024, 16(4): 550-566.
URL:
http://jal.xjegi.com/10.1007/s40333-024-0096-x OR http://jal.xjegi.com/Y2024/V16/I4/550
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