DOI: 10.1111/gcb.12967
论文题名: Impact of nitrogen deposition on forest and lake food webs in nitrogen-limited environments
作者: Meunier C.L. ; Gundale M.J. ; Sánchez I.S. ; Liess A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 1 起始页码: 164
结束页码: 179
语种: 英语
英文关键词: Arctic
; Boreal
; Bottom-up
; Ecological stoichiometry
; Food quality
; Nutrient cycle
; Top-down
; Trophic interaction
Scopus关键词: biome
; bottom-up approach
; ecosystem dynamics
; food quality
; food web
; nitrogen
; nutrient cycling
; top-down approach
; trophic interaction
; Arctic
; Hexapoda
; nitrogen
; phosphorus
; animal
; biodiversity
; ecosystem
; food chain
; forest
; lake
; metabolism
; plant
; plant development
; Animals
; Biodiversity
; Ecosystem
; Food Chain
; Forests
; Lakes
; Nitrogen
; Phosphorus
; Plant Development
; Plants
英文摘要: Increased reactive nitrogen (Nr) deposition has raised the amount of N available to organisms and has greatly altered the transfer of energy through food webs, with major consequences for trophic dynamics. The aim of this review was to: (i) clarify the direct and indirect effects of Nr deposition on forest and lake food webs in N-limited biomes, (ii) compare and contrast how aquatic and terrestrial systems respond to increased Nr deposition, and (iii) identify how the nutrient pathways within and between ecosystems change in response to Nr deposition. We present that Nr deposition releases primary producers from N limitation in both forest and lake ecosystems and raises plants' N content which in turn benefits herbivores with high N requirements. Such trophic effects are coupled with a general decrease in biodiversity caused by different N-use efficiencies; slow-growing species with low rates of N turnover are replaced by fast-growing species with high rates of N turnover. In contrast, Nr deposition diminishes below-ground production in forests, due to a range of mechanisms that reduce microbial biomass, and decreases lake benthic productivity by switching herbivore growth from N to phosphorus (P) limitation, and by intensifying P limitation of benthic fish. The flow of nutrients between ecosystems is expected to change with increasing Nr deposition. Due to higher litter production and more intense precipitation, more terrestrial matter will enter lakes. This will benefit bacteria and will in turn boost the microbial food web. Additionally, Nr deposition promotes emergent insects, which subsidize the terrestrial food web as prey for insectivores or by dying and decomposing on land. So far, most studies have examined Nr-deposition effects on the food web base, whereas our review highlights that changes at the base of food webs substantially impact higher trophic levels and therefore food web structure and functioning. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61539
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Ecology and Environmental Sciences, Umeå University, Umeå, Sweden; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden; Alfred Wegener Institute, Ostkaje 1118, Helgoland, Germany
Recommended Citation:
Meunier C.L.,Gundale M.J.,Sánchez I.S.,et al. Impact of nitrogen deposition on forest and lake food webs in nitrogen-limited environments[J]. Global Change Biology,2016-01-01,22(1)