Chlorophyll
; Eutrophication
; Nitrogen
; Phosphorus
; Bohai Bay
; Chlorophyll a
; Dissolved inorganic nitrogens
; Generalized additive model
; Negative correlation
; Nutrients concentrations
; Phytoplankton growth
; Soluble reactive phosphorus
; Nutrients
; chlorophyll a
; dissolved inorganic nitrogen
; nitrogen
; phosphorus
; soluble reactive phosphorus
; unclassified drug
; chlorophyll
; chlorophyll a
; nitrogen
; phosphorus
; sea water
; water pollutant
; chlorophyll a
; eutrophic environment
; eutrophication
; growth response
; long-term change
; numerical model
; nutrient enrichment
; phytoplankton
; Article
; China
; coastal waters
; concentration (parameters)
; controlled study
; environmental monitoring
; environmental parameters
; generalized additive model
; limit of quantitation
; phytoplankton
; seasonal variation
; spring
; summer
; analysis
; bay
; ecosystem
; eutrophication
; season
; water pollutant
; Bohai Bay
; China
; Bays
; China
; Chlorophyll
; Ecosystem
; Environmental Monitoring
; Eutrophication
; Nitrogen
; Phosphorus
; Phytoplankton
; Seasons
; Seawater
; Water Pollutants, Chemical
Scopus学科分类:
Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要:
As the representative semi-enclosed bay of China, Bohai Bay has experienced severe eutrophication in recent decades. Monitoring data from 1995 to 2013 were analysed by generalized additive models (GAMs) to explore the temporal variations in nutrients concentrations, nutrient ratios, chlorophyll a (Chl a) concentrations and the responses of Chl a to the changes in nutrients in the spring and summer. The results showed that dissolved inorganic nitrogen (DIN) decreased from 1995 to 2000 but increased after 2000 in both the spring and summer, and soluble reactive phosphorus (SRP) decreased while the molar nitrogen/phosphorus (N/P) ratios (DIN to SRP) increased over the last two decades. Generally, P-limited phytoplankton growth was observed in the spring and summer and DIN was identified as the main pollutant constituent in Bohai Bay. Furthermore, negative correlations were found between DIN and Chl a in summer in Bohai Bay. � 2017 Elsevier Ltd
Key Laboratory of Pollution Process and Environmental Criteria of Ministry of Education and Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, China
Recommended Citation:
Qiao Y.,Feng J.,Cui S.,et al. Long-term changes in nutrients, chlorophyll a and their relationships in a semi-enclosed eutrophic ecosystem, Bohai Bay, China[J]. Marine Pollution Bulletin,2017-01-01,117(2018-01-02)