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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
Source PublicationECOLOGICAL APPLICATIONS
ISSN1051-0761
Volume28Issue:4Pages:1020-1031
SubtypeArticle
AbstractVery 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.
KeywordAlpine Wetland Grazed Disturbance Restoration Sem Soil Seed Bank Tibetan Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1002/eap.1706
WOS KeywordSPECIES-RICHNESS ; PROPAGULE BANKS ; TIBETAN PLATEAU ; ALPINE MEADOW ; SPATIOTEMPORAL VARIATION ; COMMUNITY STRUCTURE ; VEGETATION CHANGES ; CLIMATE-CHANGE ; GRASSLAND ; DYNAMICS
Indexed BySCI
Language英语
Funding OrganizationNational 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 Research AreaEnvironmental Sciences & Ecology
WOS SubjectEcology ; Environmental Sciences
WOS IDWOS:000434092200013
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/13813
Collection中国科学院西北高原生物研究所
Corresponding AuthorMa, Miaojun
Affiliation1.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
Recommended Citation
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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