Biogeochemistry
; Biological materials
; Carbon
; Isotopes
; Mixing
; Nitrogen
; Organic compounds
; Sedimentology
; Sediments
; Surficial sediments
; Marine derived organic matter
; Mixing models
; Organic nitrogen
; Primary production
; Seasonal variation
; Stable isotope data
; Stable isotopes
; Total Organic Carbon
; Organic carbon
; chlorophyll a
; delta carbon 13
; delta nitrogen 15
; isotope
; marine derived organic matter
; nitrogen
; organic carbon
; organic matter
; sedimentary organic carbon
; unclassified drug
; water
; carbon
; chlorophyll
; fresh water
; humic substance
; nitrogen
; sea water
; Bayesian analysis
; chlorophyll a
; isotopic ratio
; marine sediment
; organic matter
; organic nitrogen
; seasonal variation
; sediment chemistry
; stable isotope
; total organic carbon
; Article
; bay
; Bayes theorem
; carbon source
; chemical analysis
; controlled study
; fluorescence analysis
; seasonal variation
; sediment
; summer
; surface sediment
; Tokyo Bay
; total organic carbon
; analysis
; bay
; chemistry
; environmental monitoring
; humic substance
; Japan
; procedures
; season
; sediment
; statistics and numerical data
; Honshu
; Japan
; Kanto
; Tokyo Bay
; Bayes Theorem
; Bays
; Carbon
; Carbon Isotopes
; Chlorophyll
; Environmental Monitoring
; Fresh Water
; Geologic Sediments
; Humic Substances
; Nitrogen
; Nitrogen Isotopes
; Seasons
; Seawater
; Tokyo
Scopus学科分类:
Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要:
Total organic carbon (TOC), total nitrogen (TN) contents, their stable C and N isotope ratio (δ13C and δ15N), and chlorophyll a ([Chl a]sed) of surface sediments were investigated monthly to identify the seasonal variations and sources of organic matter in Tokyo Bay. The sedimentary TOC (TOCsed) and TN (TNsed) contents, and the sedimentary δ13C and δ15N (δ13Csedand δ15Nsed) values were higher in summer than other seasons. The seasonal variations were controlled by high primary production in the water column and hypoxic water in the bottom water during summer. The fraction of terrestrial and marine derived organic matter was estimated by Bayesian mixing model using stable isotope data and TOC/TN ratio. Surface sediments in Tokyo Bay are dominated by marine derived organic matter, which accounts for about 69���5% of TOCsed. � 2016 Elsevier Ltd