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陈保冬,李雪静,徐天乐,谢伟.丛枝菌根真菌生物地理学研究进展.生态学报,2018,(4).http://dx.doi.org/10.5846/stxb201701030009  
丛枝菌根真菌生物地理学研究进展
Advances in the biogeography of arbuscular mycorrhizal fungi
投稿时间:2017-01-03  修订日期:2017-09-25
DOI: 10.5846/stxb201701030009
关键词丛枝菌根真菌  群落构建机制  尺度  生态位理论  中性理论
Key WordsArbuscular mycorrhizal fungi  Community assembly mechanism  Scale  Niche theory  Neutral theory
基金项目国家重点研发计划项目(2016YFC0500702);国家自然科学基金面上项目(41371264)
作者单位E-mail
陈保冬 中科院生态环境研究中心 bdchen@rcees.ac.cn 
李雪静 中科院生态环境研究中心  
徐天乐 中科院生态环境研究中心  
谢伟 中科院生态环境研究中心  
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摘要:
丛枝菌根真菌(arbuscular mycorrhizal fungi,AMF)普遍存在于陆地生态系统中,能与绝大多数高等植物形成菌根共生体系。AMF能够促进植物对矿质养分的吸收,增强植物的抗逆能力,在维持生态系统稳定性和生产力中发挥着重要作用。AMF生物地理学主要研究AMF的生物地理分布格局和群落构建机制,对于理解AMF在不同生态系统中的重要性至关重要。本文总结了AMF生物地理学最新研究进展及研究方法,提出了AMF生物地理学研究理论框架。认为AMF在自然界中并非简单随机分布,宿主植物、地理因子、气候因子和土壤因子共同决定AMF的群落结构,不同尺度下的AMF群落构建符合生态位-中性连续统假说,但在不同尺度下这些驱动因子的相对重要性不同。在全球尺度和区域尺度下,AMF的地理分布格局主要受地理距离和气候因子的影响,中性理论的作用大于生态位理论。随着空间尺度的缩减,宿主植物和环境因子对AMF群落的影响胜过地理距离和扩散限制的作用,生态位理论取代中性理论在AMF群落构建中的主导地位。此外,很多研究发现,同一生境中AMF的群落构建机制并非一成不变,会随环境的变化而发生改变。在未来的研究中,应在野外调查和公共数据库的基础上加强整合分析和数据挖掘工作,从而进一步丰富和完善AMF生物地理学理论。
Abstract:
Arbuscular mycorrhizal fungi (AMF) are ubiquitous soil fungi in terrestrial ecosystems, which can form symbiotic associations with the majority of higher plants. In the mycorrhizal symbiosis, AMF can facilitate uptake of mineral nutrients by plants, improve resistance of plants to various environmental stresses, and play important roles in maintaining ecosystem stability and productivity. AMF biogeography focuses on the geographical distribution pattern and community assembly mechanism of AMF, which is critical for understanding the ecological significance of AMF in various ecosystems. We summarized the recent advances in AMF biogeography, introduced the methods applied for studying AMF biogeography and outlined a theoretical framework in this research area. Generally, the AMF community does not simply exhibit random distribution, while host plants, geographical distance, climate factors, and soil physicochemical properties jointly determine the community structure. It is suggested that AMF community assembly could be predicted by both niche theory and neutral theory at different spatial scales, which ideally supports the postulate of niche-neutral continuum. At global and regional scales, the neutral theory is more important than the ecological niche theory, and AMF distribution pattern is mainly shaped by geographical distance and climate factors. However, the ecological niche theory dominates at the local and small scales. With decreasing spatial scale, the effects of host plants and environmental factors on AMF community become more important than restrictions imposed by geographical distance. Obviously, the ecological processes driving the assemblage of AMF would change owing to environmental changes. Integrated analysis and data mining based on systematic field surveys and available public databases, would be the main direction of future research into AMF biogeography.
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