Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.soilbio.2018.03.025 |
Soil biological responses to C, N and P fertilization in a polar desert of Antarctica | |
Ball, Becky A.1; Adams, Byron J.2; Barrett, J. E.3; Wall, Diana H.4,5; Virginia, Ross A.6 | |
通讯作者 | Ball, Becky A. |
来源期刊 | SOIL BIOLOGY & BIOCHEMISTRY
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ISSN | 0038-0717 |
出版年 | 2018 |
卷号 | 122页码:7-18 |
英文摘要 | In the polar desert ecosystem of the McMurdo Dry Valleys of Antarctica, biology is constrained by available liquid water, low temperatures, as well as the availability of organic matter and nutrient elements. These soil ecosystems are climate-sensitive, where projected future warming may have profound effects on biological communities and biogeochemical cycling. Wanner temperatures will mobilize meltwater from permafrost and glaciers, may increase precipitation and may be accompanied by pulses of nutrient availability. Enhanced water and nutrient availability have the potential to greatly influence desert soil biology and ecosystem processes. The objectives of this 5-year study were to determine which nutrient elements (C, N, P) are most limiting to dry valley soil communities and whether landscape history (i.e., in situ soil type and stoichiometry) influences soil community response to nutrient additions. After 3 years of no noticeable response, soil CO2 flux was significantly higher under addition of C + N than the other treatments, regardless of in situ soil stoichiometry, but microbial biomass and invertebrate abundance were variable and not influenced in the same manner. A stable isotope incubation suggests that fertilization increases C and N mineralization from organic matter via stimulating microbial activity, with loss of both the applied treatments as well in situ C and N. However, these responses are relatively short-lived, suggesting long-term impacts on C and N cycling would only occur if meltwater and nutrient pulses are sustained over time, a scenario that is increasingly likely for the dry valleys. |
英文关键词 | Stoichiometry Nutrient fertilization Water pulses Polar desert Soil respiration Soil invertebrates |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000435053800002 |
WOS关键词 | MCMURDO DRY VALLEYS ; TAYLOR VALLEY ; NITROGEN-FERTILIZATION ; MICROBIAL COMMUNITIES ; ENZYMATIC-ACTIVITIES ; SCOTTNEMA-LINDSAYAE ; NUTRIENT ENRICHMENT ; CARBON STORAGE ; CLIMATE-CHANGE ; VICTORIA LAND |
WOS类目 | Soil Science |
WOS研究方向 | Agriculture |
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/2XILL650/213202 |
作者单位 | 1.Arizona State Univ, Sch Math & Nat Sci, West Campus,4701 W Thunderbird Rd, Glendale, AZ 85306 USA; 2.Brigham Young Univ, Dept Biol, Monte L Bean Museum, Evolutionary Ecol Labs, Provo, UT 84602 USA; 3.Virginia Tech, Biol Sci, Blacksburg, VA USA; 4.Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA; 5.Colorado State Univ, Sch Global Environm Sustainabil, Ft Collins, CO 80523 USA; 6.Dartmouth Coll, Environm Studies Program, Hanover, NH 03755 USA |
推荐引用方式 GB/T 7714 | Ball, Becky A.,Adams, Byron J.,Barrett, J. E.,et al. Soil biological responses to C, N and P fertilization in a polar desert of Antarctica[J]. Colorado State University,2018,122:7-18. |
APA | Ball, Becky A.,Adams, Byron J.,Barrett, J. E.,Wall, Diana H.,&Virginia, Ross A..(2018).Soil biological responses to C, N and P fertilization in a polar desert of Antarctica.SOIL BIOLOGY & BIOCHEMISTRY,122,7-18. |
MLA | Ball, Becky A.,et al."Soil biological responses to C, N and P fertilization in a polar desert of Antarctica".SOIL BIOLOGY & BIOCHEMISTRY 122(2018):7-18. |
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