Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/gcb.12418 |
Soil microbial and nutrient responses to 7years of seasonally altered precipitation in a Chihuahuan Desert grassland | |
Bell, Colin W.1,2; Tissue, David T.2,3; Loik, Michael E.4; Wallenstein, Matthew D.1; Acosta - Martinez, Veronica5; Erickson, Richard A.6; Zak, John C.2 | |
通讯作者 | Bell, Colin W. |
来源期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2014 |
卷号 | 20期号:5页码:1657-1673 |
英文摘要 | Soil microbial communities in Chihuahuan Desert grasslands generally experience highly variable spatiotemporal rainfall patterns. Changes in precipitation regimes can affect belowground ecosystem processes such as decomposition and nutrient cycling by altering soil microbial community structure and function. The objective of this study was to determine if increased seasonal precipitation frequency and magnitude over a 7-year period would generate a persistent shift in microbial community characteristics and soil nutrient availability. We supplemented natural rainfall with large events (one/winter and three/summer) to simulate increased precipitation based on climate model predictions for this region. We observed a 2-year delay in microbial responses to supplemental precipitation treatments. In years 3-5, higher microbial biomass, arbuscular mycorrhizae abundance, and soil enzyme C and P acquisition activities were observed in the supplemental water plots even during extended drought periods. In years 5-7, available soil P was consistently lower in the watered plots compared to control plots. Shifts in soil P corresponded to higher fungal abundances, microbial C utilization activity, and soil pH. This study demonstrated that 25% shifts in seasonal rainfall can significantly influence soil microbial and nutrient properties, which in turn may have long-term effects on nutrient cycling and plant P uptake in this desert grassland. |
英文关键词 | Big Bend National Park extreme climate events precipitation manipulation soil microbial communities desert ecosystems |
类型 | Article |
语种 | 英语 |
国家 | USA ; Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000334361000023 |
WOS关键词 | COMMUNITY COMPOSITION ; TERRESTRIAL ECOSYSTEMS ; MYCORRHIZAL FUNGI ; ENZYME-ACTIVITIES ; CLIMATE-CHANGE ; CARBON ; WATER ; PULSES ; DECOMPOSITION ; AVAILABILITY |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
来源机构 | Colorado State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/182340 |
作者单位 | 1.Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80524 USA; 2.Texas Tech Univ, Dept Biol Sci, Lubbock, TX 79409 USA; 3.Univ Western Sydney, Hawkesbury Inst Environm, Richmond, NSW 2753, Australia; 4.Univ Calif Santa Cruz, Dept Environm Studies, Santa Cruz, CA 95064 USA; 5.USDA, Wind Eros & Water Conservat Unit, Lubbock, TX 79415 USA; 6.Texas Tech Univ, Inst Environm & Human Hlth, Dept Environm Toxicol, Lubbock, TX 79409 USA |
推荐引用方式 GB/T 7714 | Bell, Colin W.,Tissue, David T.,Loik, Michael E.,et al. Soil microbial and nutrient responses to 7years of seasonally altered precipitation in a Chihuahuan Desert grassland[J]. Colorado State University,2014,20(5):1657-1673. |
APA | Bell, Colin W..,Tissue, David T..,Loik, Michael E..,Wallenstein, Matthew D..,Acosta - Martinez, Veronica.,...&Zak, John C..(2014).Soil microbial and nutrient responses to 7years of seasonally altered precipitation in a Chihuahuan Desert grassland.GLOBAL CHANGE BIOLOGY,20(5),1657-1673. |
MLA | Bell, Colin W.,et al."Soil microbial and nutrient responses to 7years of seasonally altered precipitation in a Chihuahuan Desert grassland".GLOBAL CHANGE BIOLOGY 20.5(2014):1657-1673. |
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