DOI: 10.1111/gcb.12902
论文题名: Combination of herbivore removal and nitrogen deposition increases upland carbon storage
作者: Smith S.W. ; Johnson D. ; Quin S.L.O. ; Munro K. ; Pakeman R.J. ; van der Wal R. ; Woodin S.J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 8 起始页码: 3036
结束页码: 3048
语种: 英语
英文关键词: Callunavulgaris
; Exclosures
; Grazing
; Heathlands
; Moliniacaerulea
; Nitrogen deposition
; Plant litter
; Soil carbon
Scopus关键词: atmospheric deposition
; biogeochemical cycle
; carbon sequestration
; ecosystem response
; grass
; grazing pressure
; heathland
; herbivore
; litter
; nitrogen
; soil carbon
; United Kingdom
; Bryophyta
; Mammalia
; Poaceae
; carbon
; nitrogen
; soil
; agriculture
; animal
; Calluna
; chemistry
; Great Britain
; herbivory
; Poaceae
; procedures
; soil
; Agriculture
; Animals
; Calluna
; Carbon
; Great Britain
; Herbivory
; Nitrogen
; Poaceae
; Soil
英文摘要: Ecosystem carbon (C) accrual and storage can be enhanced by removing large herbivores as well as by the fertilizing effect of atmospheric nitrogen (N) deposition. These drivers are unlikely to operate independently, yet their combined effect on aboveground and belowground C storage remains largely unexplored. We sampled inside and outside 19 upland grazing exclosures, established for up to 80years, across an N deposition gradient (5-24kgNha-1yr-1) and found that herbivore removal increased aboveground plant C stocks, particularly in moss, shrubs and litter. Soil C storage increased with atmospheric N deposition, and this was moderated by the presence or absence of herbivores. In exclosures receiving above 11kgNha-1year-1, herbivore removal resulted in increased soil C stocks. This effect was typically greater for exclosures dominated by dwarf shrubs (Callunavulgaris) than by grasses (Moliniacaerulea). The same pattern was observed for ecosystem C storage. We used our data to predict C storage for a scenario of removing all large herbivores from UK heathlands. Predictions were made considering herbivore removal only (ignoring N deposition) and the combined effects of herbivore removal and current N deposition rates. Predictions including N deposition resulted in a smaller increase in UK heathland C storage than predictions using herbivore removal only. This finding was driven by the fact that the majority of UK heathlands receive low N deposition rates at which herbivore removal has little effect on C storage. Our findings demonstrate the crucial link between herbivory by large mammals and atmospheric N deposition, and this interaction needs to be considered in models of biogeochemical cycling. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61560
Appears in Collections: 影响、适应和脆弱性
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作者单位: Institute of Biological and Environmental Science, University of Aberdeen, St Machar Drive, Aberdeen, United Kingdom; The James Hutton Institute, Craigiebuckler, Aberdeen, United Kingdom; ACES, University of Aberdeen, St Machar Drive, Aberdeen, United Kingdom
Recommended Citation:
Smith S.W.,Johnson D.,Quin S.L.O.,et al. Combination of herbivore removal and nitrogen deposition increases upland carbon storage[J]. Global Change Biology,2015-01-01,21(8)