DOI: 10.1111/gcb.12238
论文题名: Winter climate change effects on soil C and N cycles in urban grasslands
作者: Durán J. ; Rodríguez A. ; Morse J.L. ; Groffman P.M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 9 起始页码: 2826
结束页码: 2837
语种: 英语
英文关键词: Carbon
; Carbon dioxide
; Global change
; Methane
; Nitrogen
; Nitrous oxide
; Nutrient cycling
; Trace gases
; Urban lawns
Scopus关键词: carbon
; carbon dioxide
; methane
; nitrogen
; nitrous oxide
; biogeochemical cycle
; carbon cycle
; carbon dioxide
; climate change
; global change
; grassland
; methane
; nitrogen cycle
; nitrous oxide
; trace gas
; urban ecosystem
; winter
; article
; chemistry
; climate change
; ecosystem
; global change
; nutrient cycling
; Poaceae
; season
; soil
; trace gases
; urban lawns
; urbanization
; carbon
; carbon dioxide
; global change
; methane
; nitrogen
; nitrous oxide
; nutrient cycling
; trace gases
; urban lawns
; Carbon
; Climate Change
; Ecosystem
; Nitrogen
; Poaceae
; Seasons
; Soil
; Urbanization
英文摘要: Despite growing recognition of the role that cities have in global biogeochemical cycles, urban systems are among the least understood of all ecosystems. Urban grasslands are expanding rapidly along with urbanization, which is expected to increase at unprecedented rates in upcoming decades. The large and increasing area of urban grasslands and their impact on water and air quality justify the need for a better understanding of their biogeochemical cycles. There is also great uncertainty about the effect that climate change, especially changes in winter snow cover, will have on nutrient cycles in urban grasslands. We aimed to evaluate how reduced snow accumulation directly affects winter soil frost dynamics, and indirectly greenhouse gas fluxes and the processing of carbon (C) and nitrogen (N) during the subsequent growing season in northern urban grasslands. Both artificial and natural snow reduction increased winter soil frost, affecting winter microbial C and N processing, accelerating C and N cycles and increasing soil : atmosphere greenhouse gas exchange during the subsequent growing season. With lower snow accumulations that are predicted with climate change, we found decreases in N retention in these ecosystems, and increases in N2O and CO2 flux to the atmosphere, significantly increasing the global warming potential of urban grasslands. Our results suggest that the environmental impacts of these rapidly expanding ecosystems are likely to increase as climate change brings milder winters and more extensive soil frost. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62348
Appears in Collections: 影响、适应和脆弱性
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作者单位: Cary Institute of Ecosystem Studies, Box AB, 2801 Sharon Turnpike, Millbrook, NY, 12545, United States
Recommended Citation:
Durán J.,Rodríguez A.,Morse J.L.,et al. Winter climate change effects on soil C and N cycles in urban grasslands[J]. Global Change Biology,2013-01-01,19(9)