Spatiotemporal characteristics of seed rain and soil seed bank of artificial Caragana korshinskii Kom. forest in the Tengger Desert, China

IF 2.7 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Journal of Arid Land Pub Date : 2024-05-18 DOI:10.1007/s40333-024-0096-x
Jianxiang Shen, Xin Wang, Lei Wang, Jiahui Wang, Wenjie Qu, Xue Zhang, Xuanxuan Chang, Xinguo Yang, Lin Chen, Weichun Qin, Bo Zhang, Jinshuai Niu
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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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中国腾格里沙漠人工卡拉干达科尔辛斯基林种子雨和土壤种子库的时空特征
植被恢复和重建是沙漠地区控制荒漠化、实现社会和经济可持续发展的有效方法。然而,植被恢复后期原生植物的自我更新能力尚不明确。因此,本研究通过调查自然条件下人工林的再生动态来弥补这一知识空白。本研究收集并量化了中国腾格里沙漠人工卡拉干达林(Caragana korshinskii Kom.)的种子雨和土壤种子库信息。发芽试验在实验室环境中进行。对种子雨和土壤种子库中的物种数量和多样性进行了分析,以评估不同固沙期(60、40和20 a)对喀拉峻人工林植被恢复进度和生态条件的影响。结果表明,种子雨中的前三位优势植物物种为 Echinops gmelinii Turcz.、Eragrostis minor Host.和 Agropyron mongolicum Keng.,土壤种子库中的前三位优势植物物种为 E. minor、Chloris virgata Sw.和 E. gmelinii。随着恢复期的延长,种子雨和土壤种子库的密度先增加后减少。而在物种丰富度方面,随着恢复期的延长,种子雨的物种丰富度逐渐增加,但土壤种子库的物种丰富度却逐渐减少。在三个恢复期中,种子雨密度与土壤种子库密度呈正相关。随着恢复期的延长,种子雨或土壤种子库与地上植被的物种相似度降低。种子的形状,特别是那些带有刺和冠毛等外部附属物的种子,显然会影响其传播,进而导致土壤种子库中的种子密度降低。此外,降水也是促进种子快速萌发的关键因素,同样导致土壤种子库中的种子密度降低。我们的研究结果为指导未来人工科尔辛基林后期的干预措施(如播种和使用无人飞行器进行恢复)提供了宝贵的见解。
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来源期刊
Journal of Arid Land
Journal of Arid Land ENVIRONMENTAL SCIENCES-
CiteScore
4.70
自引率
6.70%
发文量
768
审稿时长
3.2 months
期刊介绍: The Journal of Arid Land is an international peer-reviewed journal co-sponsored by Xinjiang Institute of Ecology and Geography, the Chinese Academy of Sciences and Science Press. It aims to meet the needs of researchers, students and practitioners in sustainable development and eco-environmental management, focusing on the arid and semi-arid lands in Central Asia and the world at large. The Journal covers such topics as the dynamics of natural resources (including water, soil and land, organism and climate), the security and sustainable development of natural resources, and the environment and the ecology in arid and semi-arid lands, especially in Central Asia. Coverage also includes interactions between the atmosphere, hydrosphere, biosphere, and lithosphere, and the relationship between these natural processes and human activities. Also discussed are patterns of geography, ecology and environment; ecological improvement and environmental protection; and regional responses and feedback mechanisms to global change. The Journal of Arid Land also presents reviews, brief communications, trends and book reviews of work on these topics.
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