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题名: Grazing disturbance increases transient but decreases persistent soil seed bank
作者: Ma, MJ; Walck, JL; Ma, Z; Wang, LP; Du, GZ
收录类别: SCIE ; PUBMED
出版日期: 2018-06
刊名: ECOLOGICAL APPLICATIONS
卷号: 28, 期号:4, 页码:1020-1031
出版者: WILEY
出版地: HOBOKEN
英文摘要: Very few studies have examined whether the impacts of grazing disturbance on soil seed banks occur directly or indirectly through aboveground vegetation and soil properties. The potential role of the seed bank in alpine wetland restoration is also unknown. We used SEM (structural equation modeling) to explore the direct effect of grazing disturbance on the seed bank and the indirect effect through aboveground vegetation and soil properties. We also studied the role of the seed bank on the restoration potential in wetlands with various grazing intensities: low (fenced, winter grazed only), medium (seasonally grazed), and high (whole-year grazed). For the seed bank, species richness and density per plot showed no difference among grazing intensities for each depth (0-5, 5-10, 10-15 cm) and for the whole depth (0-15 cm) in spring and summer. There was no direct effect of grazing disturbance on seed bank richness and density both in spring and summer, and also no indirect effect on the seed bank through its direct effect on vegetation richness and abundance. Grazing disturbance indirectly increased spring seed bank density but decreased summer seed bank density through its direct effect (negative correlation) on soil moisture and total nitrogen and its indirect effect on vegetation abundance. Species composition of the vegetation changed with grazing regime, but that of the seed bank did not. An increased trend of similarity between the seed bank and aboveground vegetation with increased grazing disturbance was found in the shallow depth and in the whole depth only in spring. Although there was almost no change in seed bank size with grazing intensities, grazing disturbance increased the quantity of transient seeds but decreased persistent seeds. Persistent seeds stored in the soil could play a crucial role in vegetation regeneration and in restoration of degraded wetland ecosystems. The seed bank should be an integral part of alpine wetland restoration programs.
关键词: alpine wetland ; grazed disturbance ; restoration ; SEM ; soil seed bank ; Tibetan Plateau
作者部门: [Ma, Miaojun ; Wang, Lipei ; Du, Guozhen] Lanzhou Univ, Sch Life Sci, State Key Lab Grassland & Agroecosyst, Lanzhou 730000, Gansu, Peoples R China ; [Walck, Jeffrey L.] Middle Tennessee State Univ, Dept Biol, Murfreesboro, TN 37132 USA ; [Ma, Zhen] Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Qinghai, Peoples R China
通讯作者: Ma, MJ (reprint author), Lanzhou Univ, Sch Life Sci, State Key Lab Grassland & Agroecosyst, Lanzhou 730000, Gansu, Peoples R China.
学科分类: Environmental Sciences & Ecology
文章类型: Article
所属项目编号: National Natural Science Foundation of China [41671246, 41430749] ; State Key Laboratory of Grassland Agro-ecosystems of Lanzhou University [SKLGAE201706] ; National Key Research and Development Program of China [2017YFC0504802]
所属项目名称: 国家自然科学基金项目 ; 国家重点研发计划
项目资助者: NSFC ; MOST ; LZU
语种: 英语
DOI: 10.1002/eap.1706
ISSN号: 1051-0761
WOS记录号: WOS:000434092200013
PM记录号: 29710415
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/195295
Appears in Collections:生命科学学院_期刊论文

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Recommended Citation:
Ma, MJ,Walck, JL,Ma, Z,et al. Grazing disturbance increases transient but decreases persistent soil seed bank[J]. ECOLOGICAL APPLICATIONS,2018,28(4):1020-1031.
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