globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-016-0190-z
Scopus记录号: 2-s2.0-84957539614
论文题名:
Key biogeochemical processes evaluated by the stable nitrogen isotopes of dissolved inorganic nitrogen in the Yodo River estuary, Japan: significance of estuarine nutrient recycling as a possible source for coastal production
作者: Sugimoto R.; Kasai A.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 128, 期:2018-01-02
语种: 英语
英文关键词: Estuary ; Eutrophication ; Nutrient ; Regeneration ; Stable isotope
Scopus关键词: biogeochemical cycle ; biological production ; dissolved inorganic nitrogen ; estuarine ecosystem ; estuary ; eutrophication ; nitrogen isotope ; nutrient cycling ; phytoplankton ; regeneration ; remineralization ; stable isotope ; Honshu ; Japan ; Kinki ; Osaka Bay ; Yodo River
英文摘要: Isotope analysis of dissolved inorganic nitrogen (DIN) and a mixing model along the salinity gradient were used to clarify the dominant biogeochemical processes controlling nutrient dynamics within a shallow eutrophic estuary in Japan. Although delivery of riverine DIN into the estuary is largely dominated by mixing with seawater during most months, internal biogeochemical processes of DIN assimilation by phytoplankton and DIN production by remineralization and subsequent nitrification within the estuary offer the most reasonable explanation for observed deviations in the isotopic compositions of (Formula presented.) from mixing behavior. However, the balance of each process changed over time. During phytoplankton blooming in summer, co-occurrence of (Formula presented.) assimilation and (Formula presented.) regeneration inhibited the accumulation of (Formula presented.) within the estuary. Moreover, assimilation of (Formula presented.) as well as (Formula presented.) by phytoplankton complicates the nutrient dynamics within the estuary. However, mostly conservative or productive behavior of DIN as well as (Formula presented.) showed that recycled nutrients are significant net source within the estuary. These results suggest recycled nutrients within the estuary could have a non-negligible impact on eutrophication in Osaka Bay. © 2016, Springer International Publishing Switzerland.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83400
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: Research Center for Marine Bioresources, Fukui Prefectural University, 49-8-2 Katsumi, Obama, Fukui, Japan; Field Science Education and Research Center, Kyoto University, Oiwake, Kitashirakawa, Sakyo, Kyoto, Japan; Faculty of Fisheries Sciences, Hokkaido University, 3-1-1, Minato-cho, Hakodate, Hokkaido, Japan

Recommended Citation:
Sugimoto R.,Kasai A.. Key biogeochemical processes evaluated by the stable nitrogen isotopes of dissolved inorganic nitrogen in the Yodo River estuary, Japan: significance of estuarine nutrient recycling as a possible source for coastal production[J]. Biogeochemistry,2016-01-01,128(2018-01-02)
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