DOI: 10.1007/s10533-017-0350-9
Scopus记录号: 2-s2.0-85020742078
论文题名: Mediation of macronutrients and carbon by post-disturbance shelf sea sediment communities
作者: Hale R. ; Godbold J.A. ; Sciberras M. ; Dwight J. ; Wood C. ; Hiddink J.G. ; 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: 121
结束页码: 133
语种: 英语
英文关键词: Biodiversity
; Biogeochemical cycles
; Bioturbation
; Ecosystem function
; Nitrogen
; Recovery
Scopus关键词: benthos
; biodiversity
; biogeochemical cycle
; biogeochemistry
; bioturbation
; carbon cycle
; cohesive sediment
; community structure
; concentration (composition)
; ecosystem function
; nitrogen cycle
; organic carbon
; organic matter
; physical disturbance
; sediment chemistry
; sediment-water interface
; shelf sea
; shelf sediment
英文摘要: Benthic communities play a major role in organic matter remineralisation and the mediation of many aspects of shelf sea biogeochemistry. Few studies have considered how changes in community structure associated with different levels of physical disturbance affect sediment macronutrients and carbon following the cessation of disturbance. Here, we investigate how faunal activity (sediment particle reworking and bioirrigation) in communities that have survived contrasting levels of bottom fishing affect sediment organic carbon content and macronutrient concentrations ([NH4–N], [NO2–N], [NO3–N], [PO4–P], [SiO4–Si]). We find that organic carbon content and [NO3–N] decline in cohesive sediment communities that have experienced an increased frequency of fishing, whilst [NH4–N], [NO2–N], [PO4–P] and [SiO4–Si] are not affected. [NH4–N] increases in non-cohesive sediments that have experienced a higher frequency of fishing. Further analyses reveal that the way communities are restructured by physical disturbance differs between sediment type and with fishing frequency, but that changes in community structure do little to affect bioturbation and associated levels of organic carbon and nutrient concentrations. Our results suggest that in the presence of physical disturbance, irrespective of sediment type, the mediation of macronutrient and carbon cycling increasingly reflects the decoupling of organism-sediment relations. Indeed, it is the traits of the species that reside at the sediment–water interface, or that occupy deeper parts of the sediment profile, that are disproportionately expressed post-disturbance, that are most important for sustaining biogeochemical functioning. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83238
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 and Earth Science, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton, United Kingdom; Biological Sciences,Faculty of Natural and Environmental Sciences, University of Southampton, Highfield Campus, Life Sciences Building 85, Southampton, United Kingdom; School of Ocean Sciences, Bangor University, Menai Bridge, Bangor, United Kingdom
Recommended Citation:
Hale R.,Godbold J.A.,Sciberras M.,et al. Mediation of macronutrients and carbon by post-disturbance shelf sea sediment communities[J]. Biogeochemistry,2017-01-01,135(2018-01-02)