Arid
DOI10.1016/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
ISSN0038-0717
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.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Ball, Becky A.]的文章
[Adams, Byron J.]的文章
[Barrett, J. E.]的文章
百度学术
百度学术中相似的文章
[Ball, Becky A.]的文章
[Adams, Byron J.]的文章
[Barrett, J. E.]的文章
必应学术
必应学术中相似的文章
[Ball, Becky A.]的文章
[Adams, Byron J.]的文章
[Barrett, J. E.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。