中国黄土高原地区土壤生物结壳对维管束植物生长的作用

IF 2.8 3区 环境科学与生态学 Q2 ECOLOGY Restoration Ecology Pub Date : 2024-07-12 DOI:10.1111/rec.14235
Guifang Hu, Ning Wang, Jiamin Chen, Li Qin, Jun'e Liu, Zhengchao Zhou
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引用次数: 0

摘要

在全球范围内,生物土壤板结(BSCs)是生态系统的重要组成部分,对生态系统的稳定起着至关重要的作用。然而,生物土壤板结对维管束植物的新陈代谢和生长的潜在影响机制在很大程度上还不为人所知。此外,很少有研究将 BSC-维管植物分析与 BSC 微环境、种子性状和植物生命阶段同时考虑。因此,我们在黄土高原选择了六种具有不同种子性状的典型植物,并进行了生长室实验,以评估 BSC 类型、干扰、播种位置和水分对种子萌发、存活和幼苗生长的影响。我们还通过田间调查探讨了BSC存在和干扰对出苗的影响。结果表明,BSC 类型、干扰、播种位置和水分这四个因素的主效应及其二维和三维交互作用对大多数研究物种的表现有显著影响。扰动和浇水间隔较短的湿润处理促进了大多数植物的表现,而水分可改变 BSCs 对植物的影响。生物碱对植物表现的影响与种子性状和植物生命阶段有关,当植物进入存活阶段时,生物碱的存在会促进植物的生长。在实地观察中,我们发现与裸地相比,BSC 上的幼苗种类数量较少,破损结壳上的种类数量多于完整结壳上;而裸地的幼苗密度明显高于 BSC 斑块上的幼苗密度。
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The role of biological soil crusts in vascular plant recruitment in the Loess Plateau region, China
Globally, biological soil crusts (BSCs) are crucial ecosystem components that perform essential functions important to ecosystem stability. However, the potential mechanisms of BSC's effect on vascular plant recruitment and establishment are largely unknown. Furthermore, few studies have considered BSC‐vascular plant analyses in conjunction with BSC microenvironments, seed traits, and plant life stages simultaneously. Thus, we chose six typical plants with different seed traits on the Loess Plateau and conducted a growth chamber experiment to evaluate the effects of BSC types, disturbance, seeding positions, and moisture on seed germination, survival, and seedling growth. We also explored the effects of BSC presence and disturbance on seedling emergence through field investigation. The results indicated that the main effects of the four factors, BSC type, disturbance, seeding location, and moisture, and their two‐ and three‐dimensional interactions had significant effects on the performance of most of the studied species. Disturbance and wetting treatments with shorter watering intervals promoted the performance of most plants, and moisture could modify the effect of BSCs on plants. The effect of BSCs on plant performance was related to seed traits and plant life stage and the presence of the BSC promotes the growth of the plants when it reaches the survival stage. In field observations, we found that the number of seedling species was lower on BSCs compared to bare lands and that the number of species on broken crusts was greater than on intact crusts; while seedling density on bare land was significantly higher than it in BSC patches.
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来源期刊
Restoration Ecology
Restoration Ecology 环境科学-生态学
CiteScore
6.50
自引率
15.60%
发文量
226
审稿时长
12-24 weeks
期刊介绍: Restoration Ecology fosters the exchange of ideas among the many disciplines involved with ecological restoration. Addressing global concerns and communicating them to the international research community and restoration practitioners, the journal is at the forefront of a vital new direction in science, ecology, and policy. Original papers describe experimental, observational, and theoretical studies on terrestrial, marine, and freshwater systems, and are considered without taxonomic bias. Contributions span the natural sciences, including ecological and biological aspects, as well as the restoration of soil, air and water when set in an ecological context; and the social sciences, including cultural, philosophical, political, educational, economic and historical aspects. Edited by a distinguished panel, the journal continues to be a major conduit for researchers to publish their findings in the fight to not only halt ecological damage, but also to ultimately reverse it.
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