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Grazing disturbance increases transient but decreases persistent soil seed bank
Ma, Miaojun1; Walck, Jeffrey L.2; Ma, Zhen3; Wang, Lipei1; Du, Guozhen1
2018-06-01
发表期刊ECOLOGICAL APPLICATIONS
ISSN1051-0761
卷号28期号:4页码:1020-1031
文章类型Article
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
WOS标题词Science & Technology ; Life Sciences & Biomedicine
DOI10.1002/eap.1706
关键词[WOS]SPECIES-RICHNESS ; PROPAGULE BANKS ; TIBETAN PLATEAU ; ALPINE MEADOW ; SPATIOTEMPORAL VARIATION ; COMMUNITY STRUCTURE ; VEGETATION CHANGES ; CLIMATE-CHANGE ; GRASSLAND ; DYNAMICS
收录类别SCI
语种英语
项目资助者National Natural Science Foundation of China(41671246 ; State Key Laboratory of Grassland Agro-ecosystems of Lanzhou University(SKLGAE201706) ; National Key Research and Development Program of China(2017YFC0504802) ; 41430749)
WOS研究方向Environmental Sciences & Ecology
WOS类目Ecology ; Environmental Sciences
WOS记录号WOS:000434092200013
出版者WILEY
引用统计
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/13813
专题中国科学院西北高原生物研究所
通讯作者Ma, Miaojun
作者单位1.Lanzhou Univ, Sch Life Sci, State Key Lab Grassland & Agroecosyst, Lanzhou 730000, Gansu, Peoples R China
2.Middle Tennessee State Univ, Dept Biol, Murfreesboro, TN 37132 USA
3.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Qinghai, Peoples R China
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GB/T 7714
Ma, Miaojun,Walck, Jeffrey L.,Ma, Zhen,et al. Grazing disturbance increases transient but decreases persistent soil seed bank[J]. ECOLOGICAL APPLICATIONS,2018,28(4):1020-1031.
APA Ma, Miaojun,Walck, Jeffrey L.,Ma, Zhen,Wang, Lipei,&Du, Guozhen.(2018).Grazing disturbance increases transient but decreases persistent soil seed bank.ECOLOGICAL APPLICATIONS,28(4),1020-1031.
MLA Ma, Miaojun,et al."Grazing disturbance increases transient but decreases persistent soil seed bank".ECOLOGICAL APPLICATIONS 28.4(2018):1020-1031.
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