Arid
DOI10.3389/fmicb.2018.01401
Stoichiometric Shifts in Soil C:N:P Promote Bacterial Taxa Dominance, Maintain Biodiversity, and Deconstruct Community Assemblages
Aanderud, Zachary T.1; Saurey, Sabrina1; Ball, Becky A.2; Wall, Diana H.3; Barrett, John E.4; Muscarella, Mario E.5; Griffin, Natasha A.1; Virginia, Ross A.6; Adams, Byron J.7,8
通讯作者Aanderud, Zachary T.
来源期刊FRONTIERS IN MICROBIOLOGY
ISSN1664-302X
出版年2018
卷号9
英文摘要

Imbalances in C:N:P supply ratios may cause bacterial resource limitations and constrain biogeochemical processes, but the importance of shifts in soil stoichiometry are complicated by the nearly limitless interactions between an immensely rich species pool and a multiple chemical resource forms. To more clearly identify the impact of soil C:N:P on bacteria, we evaluated the cumulative effects of single and coupled long-term nutrient additions (i.e., C as mannitol, N as equal concentrations NH4+ and NO3-, and P as Na3PO4) and water on communities in an Antarctic polar desert, Taylor Valley. Untreated soils possessed relatively low bacterial diversity, simplified organic C sources due to the absence of plants, limited inorganic N, and excess soil P potentially attenuating links between C:N:P. After 6 years of adding resources, an alleviation of C and N colimitation allowed one rare Micrococcaceae, an Arthrobacter species, to dominate, comprising 47% of the total community abundance and elevating soil respiration by 136% relative to untreated soils. The addition of N alone reduced C:N ratios, elevated bacterial richness and diversity, and allowed rare taxa relying on ammonium and nitrite for metabolism to become more abundant [e.g., nitrite oxidizing Nitrospira species (Nitrosomonadaceae), denitrifiers utilizing nitrite (Gemmatimonadaceae) and members of Rhodobacteraceae with a high affinity for ammonium]. Based on community co-occurrence networks, lower C:P ratios in soils following P and CP additions created more diffuse and less connected communities by disrupting 73% of species interactions and selecting for taxa potentially exploiting abundant P. Unlike amended nutrients, water additions alone elicited no lasting impact on communities. Our results suggest that as soils become nutrient rich a wide array of outcomes are possible from species dominance and the deconstruction of species interconnectedness to the maintenance of biodiversity.


英文关键词ecological stoichiometry Lake Fryxell Basin McMurdo Dry Valleys network community modeling nutrient colimitation Solirubrobacteriaceae
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000437179300001
WOS关键词MCMURDO DRY VALLEYS ; TAYLOR VALLEY ; MICROBIAL COMMUNITY ; GLOBAL PATTERNS ; VICTORIA LAND ; ECOLOGICAL STOICHIOMETRY ; NITROGEN DEPOSITION ; P FERTILIZATION ; PLANT DIVERSITY ; ORGANIC-MATTER
WOS类目Microbiology
WOS研究方向Microbiology
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/2XILL650/209438
作者单位1.Brigham Young Univ, Dept Plant & Wildlife Sci, Provo, UT 84602 USA;
2.Arizona State Univ, Sch Math & Nat Sci, Phoenix, AZ USA;
3.Colorado State Univ, Dept Biol, Sch Global Environm Sustainabil, Ft Collins, CO 80523 USA;
4.Virginia Poktech Inst, Dept Biol Sci, Blacksburg, VA USA;
5.Univ Illinois, Dept Plant Biol, Champaign, IL USA;
6.Dartmouth Coll, Environm Studies Program, Hanover, NH 03755 USA;
7.Brigham Young Univ, Evolutionary Ecol Labs, Dept Biol, Provo, UT 84602 USA;
8.Brigham Young Univ, Dept Biol, Monte L Bean Museum, Provo, UT 84602 USA
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GB/T 7714
Aanderud, Zachary T.,Saurey, Sabrina,Ball, Becky A.,et al. Stoichiometric Shifts in Soil C:N:P Promote Bacterial Taxa Dominance, Maintain Biodiversity, and Deconstruct Community Assemblages[J]. Colorado State University,2018,9.
APA Aanderud, Zachary T..,Saurey, Sabrina.,Ball, Becky A..,Wall, Diana H..,Barrett, John E..,...&Adams, Byron J..(2018).Stoichiometric Shifts in Soil C:N:P Promote Bacterial Taxa Dominance, Maintain Biodiversity, and Deconstruct Community Assemblages.FRONTIERS IN MICROBIOLOGY,9.
MLA Aanderud, Zachary T.,et al."Stoichiometric Shifts in Soil C:N:P Promote Bacterial Taxa Dominance, Maintain Biodiversity, and Deconstruct Community Assemblages".FRONTIERS IN MICROBIOLOGY 9(2018).
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