naa a22 4500 510754384 CHVBK 20180411083117.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s13131-013-0293-5 doi (NATIONALLICENCE)springer-10.1007/s13131-013-0293-5 Seasonal variations of particulate silicon in the Changjiang (Yangtze River) Estuary and its adjacent area [Elektronische Daten] [Lu Cao, Sumei Liu, Jingling Ren] Temporal and spatial distribution of biogenic (BSi) and lithogenic (LSi) silica were studied in the Changjiang (Yangtze River) Estuary and its adjacent area. The annual average BSi and LSi concentrations were (1.71±1.79) µmol/L and (0.56±1.41) mmol/L, respectively. Both BSi and LSi were high in the inshore areas, where they received terrigenous discharge from the Changjiang, and decreased towards the offshore region. BSi and LSi were most abundant at the near bottom layer due to the high sedimentation rates and resuspension of sediment. Diatom blooms occurred in summer with high Chl a concentration in the surface layer, which induced that BSi in the surface layer during summer was obviously higher than that in the surface layer of other seasons. LSi concentration was maximal in autumn and spring and minimum in summer, associated with the seasonal variation of SPM values. Drifting investigation and mesocosm experiments were conducted during dinoflagellate bloom, aiming to understand the effect of nutrients on BSi by changing the phytoplankton composition. The results show that the low dissolved inorganic phosphorus concentration and high molar ratio of N/P (dissolved inorganic nitrogen vs. dissolved inorganic phosphorus), were the important factors for decreasing diatombiomass in the study area, and it would subsequently decrease the BSi concentration in aquatic ecosystem. The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg, 2013 biogenic silica nationallicence lithogenic silica nationallicence dissolved silicate nationallicence suspended particulate matter nationallicence Changjiang (Yangtze River) Estuary nationallicence East China Sea nationallicence Cao Lu Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, China aut Liu Sumei Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, China aut Ren Jingling Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, China aut Acta Oceanologica Sinica The Chinese Society of Oceanography 32/4(2013-04-01), 1-10 0253-505X 32:4<1 2013 32 13131 https://doi.org/10.1007/s13131-013-0293-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s13131-013-0293-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cao Lu Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, China aut NATIONALLICENCE 700 1- Liu Sumei Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, China aut NATIONALLICENCE 700 1- Ren Jingling Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266100, Qingdao, China aut NATIONALLICENCE 773 0- Acta Oceanologica Sinica The Chinese Society of Oceanography 32/4(2013-04-01), 1-10 0253-505X 32:4<1 2013 32 13131 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer