Arid
DOI10.3389/fmicb.2015.00009
Microbial community composition of transiently wetted Antarctic Dry Valley soils
Niederberger, Thomas D.1; Sohm, Jill A.2,3; Gunderson, Troy E.2,3; Parker, Alexander E.4; Tirindelli, Joelle4; Capone, Douglas G.2,3; Carpenter, Edward J.4; Cary, Stephen C.1,5
通讯作者Cary, Stephen C.
来源期刊FRONTIERS IN MICROBIOLOGY
ISSN1664-302X
出版年2015
卷号6
英文摘要

During the summer months, wet (hyporheic) soils associated with ephemeral streams and lake edges in the Antarctic Dry Valleys (DVs) become hotspots of biological activity and are hypothesized to be an important source of carbon and nitrogen for arid DV soils. Recent research in the DV has focused on the geochemistry and microbial ecology of lakes and arid soils, with substantially less information being available on hyporheic soils. Here, we determined the unique properties of hyporheic microbial communities, resolved their relationship to environmental parameters and compared them to archetypal arid DV soils. Generally, pH increased and chlorophyll a concentrations decreased along transects from wet to arid soils (9.0 to similar to 7.0 for pH and similar to 0.8 to similar to 5 mu g/cm(3) for chlorophyll a, respectively). Soil water content decreased to below 3% in the arid soils. Community fingerprinting-based principle component analyses revealed that bacterial communities formed distinct clusters specific to arid and wet soils; however, eukaryotic communities that clustered together did not have similar soil moisture content nor did they group together based on sampling location. Collectively, rRNA pyrosequencing indicated a considerably higher abundance of Cyanobacteria in wet soils and a higher abundance of Acidobacterial, Actinobacterial, Deinococcus/Thermus, Bacteroidetes, Firmicutes, Gemmatimonadetes, Nitrospira, and Planctomycetes in arid soils. The two most significant differences at the genus level were Gillisia signatures present in arid soils and chloroplast signatures related to Streptophyta that were common in wet soils. Fungal dominance was observed in arid soils and Viridiplantae were more common in wet soils. This research represents an in-depth characterization of microbial communities inhabiting wet DV soils. Results indicate that the repeated wetting of hyporheic zones has a profound impact on the bacterial and eukaryotic communities inhabiting in these areas.


英文关键词Dry Valley Antarctica microbial diversity microbial community hyporheic
类型Article
语种英语
国家USA ; New Zealand
收录类别SCI-E
WOS记录号WOS:000349100500001
WOS关键词POLAR DESERT ; BACTERIAL DIVERSITY ; VICTORIA LAND ; SP-NOV. ; FAMILY FLAVOBACTERIACEAE ; TAYLOR VALLEY ; MINERAL SOILS ; LAKE ICE ; STREAMS ; BIODIVERSITY
WOS类目Microbiology
WOS研究方向Microbiology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/187366
作者单位1.Univ Delaware, Coll Marine & Earth Sci, Lewes, DE 19958 USA;
2.Univ So Calif, Wrigley Inst Environm Studies, Los Angeles, CA USA;
3.Univ So Calif, Dept Biol Sci, Los Angeles, CA 90089 USA;
4.San Francisco State Univ, Romberg Tiburon Ctr Environm Studies, Tiburon, CA USA;
5.Univ Waikato, Sch Sci, Hamilton 3240, New Zealand
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GB/T 7714
Niederberger, Thomas D.,Sohm, Jill A.,Gunderson, Troy E.,et al. Microbial community composition of transiently wetted Antarctic Dry Valley soils[J],2015,6.
APA Niederberger, Thomas D..,Sohm, Jill A..,Gunderson, Troy E..,Parker, Alexander E..,Tirindelli, Joelle.,...&Cary, Stephen C..(2015).Microbial community composition of transiently wetted Antarctic Dry Valley soils.FRONTIERS IN MICROBIOLOGY,6.
MLA Niederberger, Thomas D.,et al."Microbial community composition of transiently wetted Antarctic Dry Valley soils".FRONTIERS IN MICROBIOLOGY 6(2015).
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