globalchange  > 气候减缓与适应
DOI: 10.1016/j.jmarsys.2019.04.001
WOS记录号: WOS:000472689700001
论文题名:
Biogenic matter characteristics, deposition flux correction, and internal phosphorus transformation in Jiaozhou Bay, North China
作者: Liu, Jin1,2,4; Song, Jinming1,2,3,4; Yuan, Huamao1,2,3,4; Li, Xuegang1,2,3,4; Li, Ning1,2,3,4; Duan, Liqin1,2,3,4
通讯作者: Song, Jinming ; Yuan, Huamao
刊名: JOURNAL OF MARINE SYSTEMS
ISSN: 0924-7963
EISSN: 1879-1573
出版年: 2019
卷: 196, 页码:1-13
语种: 英语
英文关键词: Biogenic elements ; Sediment resuspension ; Phosphorus sink-switching ; Organic matter degradation ; Jiaozhou Bay
WOS关键词: PARTICULATE ORGANIC-CARBON ; SEDIMENT-WATER INTERFACE ; SURFACE SEDIMENTS ; CHANGJIANG ESTUARY ; AUTHIGENIC APATITE ; DEEP-SEA ; RESUSPENSION ; SPECIATION ; SILICA ; LAKE
WOS学科分类: Geosciences, Multidisciplinary ; Marine & Freshwater Biology ; Oceanography
WOS研究方向: Geology ; Marine & Freshwater Biology ; Oceanography
英文摘要:

Sediment resuspension in coastal environments is associated with both nutrient repartitioning and with the biological carbon pump, which are further linked to climate change, eutrophication, and marine pollution. To explore these relationships, a resuspension framework, including surficial/core sediments and settling trap-collected particles (TCPs), was assessed in the Jiaozhou Bay (JZB) to examine the behavior and fate of particulate biogenic elements (C, N, P and Si). Resuspension-mediated differences in the concentrations of numerous biogenic proxies were significant and mainly corresponded to selective upwelling of fine-sized, nutrient-enriched particles, to autochthonous organic matter degradation below the trap-deployed level comprising water column transportation and long-term retention at the sediment-water interface. This is further reinforced by smaller inorganic carbon concentrations in sediments and origin-indicating stoichiometric ratio records (OC:ON, OC:OP). Nevertheless, biogenic silica (BSi) exhibited a near homologous concentration and had the largest preservation efficiency. Three principal components, representing production and preservation, remineralisation, and a particle-size effect, accounted for 55.5%, 14.0%, and 9.1% of the total variance, respectively. After calibration, the primary sinking flux was two orders of magnitude smaller than the measured absolute sedimenting flux. Also, the limited bottom achieving contribution with a maximum of 28.3% for freshly biogenic particles produced in autumn/winter circumstances with low primary productivity was inferred. The recurrent resuspension processes in JZB demonstrated that 5-12 cycles of similar or higher intensity resuspension was required before freshly-formed biogenic particles could ultimately be integrated into the sediments. Regarding the internal P sink-switching mechanism, the previously transformed Fe-bound fraction across the estuarine salinity gradient has limited application under offshore redox oscillations, whereas near-quantitative transfer of dissolved P from remineralized organic matter to authigenic carbonate fluorapatite could substantially reduce its bio-availability in resuspended particulate P.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/124663
Appears in Collections:气候减缓与适应

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作者单位: 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, 7 Nanhai Rd, Qingdao 266071, Shandong, Peoples R China
2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Ecol & Environm Sci, Qingdao 266237, Shandong, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Shandong, Peoples R China

Recommended Citation:
Liu, Jin,Song, Jinming,Yuan, Huamao,et al. Biogenic matter characteristics, deposition flux correction, and internal phosphorus transformation in Jiaozhou Bay, North China[J]. JOURNAL OF MARINE SYSTEMS,2019-01-01,196:1-13
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