DOI: 10.1007/s10533-017-0370-5
Scopus记录号: 2-s2.0-85028757280
论文题名: Mediation of nitrogen by post-disturbance shelf communities experiencing organic matter enrichment
作者: Sciberras M. ; Tait K. ; Brochain G. ; Hiddink J.G. ; Hale R. ; Godbold J.A. ; Solan M.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 135, 期: 2018-01-02 起始页码: 135
结束页码: 153
语种: 英语
英文关键词: Ammonia-oxidisers
; Bioturbation
; Bottom fishing
; Denitrification
; Ecosystem functioning
; Microbial–invertebrate interactions
; Nitrogen cycling
Scopus关键词: ammonia
; anthropogenic effect
; benthos
; bioturbation
; bottom trawling
; community structure
; denitrification
; deposit feeder
; ecosystem function
; environmental disturbance
; macroinvertebrate
; microbial community
; nitrogen
; nitrogen cycle
; nutrient availability
; organic matter
; oxidation
; shelf sediment
; Archaea
; Bacteria (microorganisms)
; Invertebrata
英文摘要: Microbes and benthic macro-invertebrates interact in sediments to play a major role in the biogeochemical cycling of organic matter, but the extent to which their contributions are modified following natural and anthropogenic changes has received little attention. Here, we investigate how nitrogen transformations, ascertained from changes in archaeal and bacterial N-cycling microbes and water macronutrient concentrations ([NH4–N], [NO2–N], [NO3–N]), in sand and sandy mud sediments differ when macrofaunal communities that have previously experienced contrasting levels of chronic fishing disturbance are exposed to organic matter enrichment. We find that differences in macrofaunal community structure related to differences in fishing activity affect the capacity of the macrofauna to mediate microbial nitrogen cycling in sand, but not in sandy mud environments. Whilst we found no evidence for a change in ammonia oxidiser community structure, we did find an increase in archaeal and bacterial denitrifier (AnirKa, nirS) and anammox (hzo) transcripts in macrofaunal communities characterized by higher ratios of suspension to deposit feeders, and a lower density but higher biomass of sediment-reworking fauna. Our findings suggest that nitrogen transformation in shelf sandy sediments is dependent on the stimulation of specific nitrogen cycling pathways that are associated with differences in the composition and context-dependent expression of the functional traits that belong to the resident bioturbating macrofauna community. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83244
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: School of Ocean Sciences, Bangor University, Askew St, Menai Bridge, Anglesey, United Kingdom; Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth, United Kingdom; Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton, United Kingdom
Recommended Citation:
Sciberras M.,Tait K.,Brochain G.,et al. Mediation of nitrogen by post-disturbance shelf communities experiencing organic matter enrichment[J]. Biogeochemistry,2017-01-01,135(2018-01-02)