Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14471 |
Quantifying the legacy of snowmelt timing on soil greenhouse gas emissions in a seasonally dry montane forest | |
Blankinship, Joseph C.1,2; McCorkle, Emma P.1,2; Meadows, Matthew W.2; Hart, Stephen C.1,2 | |
2018-12-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:12页码:5933-5947 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The release of water during snowmelt orchestrates a variety of important belowground biogeochemical processes in seasonally snow-covered ecosystems, including the production and consumption of greenhouse gases (GHGs) by soil microorganisms. Snowmelt timing is advancing rapidly in these ecosystems, but there is still a need to isolate the effects of earlier snowmelt on soil GHG fluxes. For an improved mechanistic understanding of the biogeochemical effects of snowmelt timing during the snow-free period, we manipulated a high-elevation forest that typically receives over two meters of snowfall but little summer precipitation to influence legacy effects of snowmelt timing. We altered snowmelt rates for two years using black sand to accelerate snowmelt and white fabric to postpone snowmelt, thus creating a two- to three-week disparity in snowmelt timing. Soil microclimate and fluxes of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) were monitored weekly to monthly during the snow-free period. Microbial abundances were estimated by potential assays near the end of each snow-free period. Although earlier snowmelt caused soil drying, we found no statistically significant effects (p < 0.05) of altered snowmelt timing on fluxes of CO2 or N2O, or soil microbial abundances. Soil CH4 fluxes, however, did respond to snowmelt timing, with 18% lower rates of CH4 uptake in the earlier snowmelt treatment, but only after a dry winter. Cumulative CO2 emission and CH4 uptake were 43% and 88% greater, respectively, after the dry winter. We conclude that soil GHG fluxes can be surprisingly resistant to hydrological changes associated with earlier snowmelt, likely because of persistent moisture and microbial activities in deeper mineral soils. As a result, a drier California in the future may cause seasonally snow-covered soils in the Sierra Nevada to emit more GHGs, not less. |
英文关键词 | methane oxidation nitrous oxide snow manipulation soil respiration Southern Sierra Critical Zone Observatory |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000449650600027 |
WOS关键词 | SUB-ALPINE MEADOW ; ECOSYSTEM CO2 EXCHANGE ; COLORADO FRONT RANGE ; MIXED-CONIFER FOREST ; SIERRA-NEVADA ; HIGH-ELEVATION ; CLIMATE-CHANGE ; NITROUS-OXIDE ; INTERANNUAL VARIATION ; MICROBIAL BIOMASS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17623 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Calif, Life & Environm Sci, Merced, CA 95343 USA; 2.Univ Calif, Sierra Nevada Res Inst, Merced, CA 95343 USA |
推荐引用方式 GB/T 7714 | Blankinship, Joseph C.,McCorkle, Emma P.,Meadows, Matthew W.,et al. Quantifying the legacy of snowmelt timing on soil greenhouse gas emissions in a seasonally dry montane forest[J]. GLOBAL CHANGE BIOLOGY,2018,24(12):5933-5947. |
APA | Blankinship, Joseph C.,McCorkle, Emma P.,Meadows, Matthew W.,&Hart, Stephen C..(2018).Quantifying the legacy of snowmelt timing on soil greenhouse gas emissions in a seasonally dry montane forest.GLOBAL CHANGE BIOLOGY,24(12),5933-5947. |
MLA | Blankinship, Joseph C.,et al."Quantifying the legacy of snowmelt timing on soil greenhouse gas emissions in a seasonally dry montane forest".GLOBAL CHANGE BIOLOGY 24.12(2018):5933-5947. |
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