The size-fractionated composition of particulate biogenic silica and its ecological significance in the Changjiang Estuary area
The concentrations and distributions of particulate biogenic silica (PBSi) and its size-fractionated composition (>20 μm, 0.8–20 μm) of the Changjiang Estuary and its adjacent area were investigated during the summer of 2011. PBSi, primarily produced by diatoms in the surface waters of oceans...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2025-01-01
|
| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2025.1471650/full |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832541109302067200 |
|---|---|
| author | Xizhen Liu Xizhen Liu Bin Wang Bin Wang Siyang Chen Haiyan Jin Haiyan Jin Yanpei Zhuang Zhibing Jiang Hongliang Li Hongliang Li Jianfang Chen Jianfang Chen |
| author_facet | Xizhen Liu Xizhen Liu Bin Wang Bin Wang Siyang Chen Haiyan Jin Haiyan Jin Yanpei Zhuang Zhibing Jiang Hongliang Li Hongliang Li Jianfang Chen Jianfang Chen |
| author_sort | Xizhen Liu |
| collection | DOAJ |
| description | The concentrations and distributions of particulate biogenic silica (PBSi) and its size-fractionated composition (>20 μm, 0.8–20 μm) of the Changjiang Estuary and its adjacent area were investigated during the summer of 2011. PBSi, primarily produced by diatoms in the surface waters of oceans, was examined for correlations with hydrographic conditions, nutrients, particulate organic carbon, and dissolved oxygen. The distribution of PBSi showed distinct patterns: high levels in nearshore, but relatively low further offshore; low concentrations in the surface layer, whereas relatively high concentrations in the bottom layer. Large-sized PBSi (>20 μm) prevailed in the surface layer, whereas small-sized PBSi (0.8–20 μm) dominated in the bottom layer. Temperature and nutrients were crucial factors controlling the grain size structure and distribution of PBSi. Further, we observed that the distinct zones of high PBSi values in the surface waters were affected by the Changjiang freshwater flushing, and those in the bottom waters were affected by the Yellow Sea Cold Water masses. Moreover, in the area where >20-μm PBSi prevailed, the silicate-to-nitrate ratio was less than 1 at most sampling stations, rendering silicate the limiting nutrient in this area. The PBSi/particulate organic carbon values in the surface waters of the study area ranged from 0.01 to 0.3. Areas exhibiting values exceeding 0.13 primarily clustered in nearshore waters, which was characterized by a dominance of large-sized (>20 μm) PBSi. The nearshore benthic waters exhibited anoxic conditions, where diatoms predominantly comprised the phytoplankton biomass and organic matter featured marine phytoplankton. Consequently, the proliferation of diatoms (siliceous phytoplankton) in the midupper water significantly contributed to the hypoxic conditions at the bottom, as diatoms underwent dissolution during sedimentation, leading to oxygen depletion. |
| format | Article |
| id | doaj-art-faeb6609baa54bc3997bf5b752e0ee56 |
| institution | Kabale University |
| issn | 2296-7745 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj-art-faeb6609baa54bc3997bf5b752e0ee562025-02-04T10:11:36ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452025-01-011210.3389/fmars.2025.14716501471650The size-fractionated composition of particulate biogenic silica and its ecological significance in the Changjiang Estuary areaXizhen Liu0Xizhen Liu1Bin Wang2Bin Wang3Siyang Chen4Haiyan Jin5Haiyan Jin6Yanpei Zhuang7Zhibing Jiang8Hongliang Li9Hongliang Li10Jianfang Chen11Jianfang Chen12Marine Monitoring and Forecasting Center of Zhejiang Province, Hangzhou, ChinaKey Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, ChinaKey Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, ChinaDonghai Laboratory, Zhoushan, ChinaMarine Monitoring and Forecasting Center of Zhejiang Province, Hangzhou, ChinaKey Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, ChinaState Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, ChinaPolar and Marine Research Institute, Jimei University, Xiamen, ChinaKey Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, ChinaKey Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, ChinaState Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, ChinaKey Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, ChinaState Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, ChinaThe concentrations and distributions of particulate biogenic silica (PBSi) and its size-fractionated composition (>20 μm, 0.8–20 μm) of the Changjiang Estuary and its adjacent area were investigated during the summer of 2011. PBSi, primarily produced by diatoms in the surface waters of oceans, was examined for correlations with hydrographic conditions, nutrients, particulate organic carbon, and dissolved oxygen. The distribution of PBSi showed distinct patterns: high levels in nearshore, but relatively low further offshore; low concentrations in the surface layer, whereas relatively high concentrations in the bottom layer. Large-sized PBSi (>20 μm) prevailed in the surface layer, whereas small-sized PBSi (0.8–20 μm) dominated in the bottom layer. Temperature and nutrients were crucial factors controlling the grain size structure and distribution of PBSi. Further, we observed that the distinct zones of high PBSi values in the surface waters were affected by the Changjiang freshwater flushing, and those in the bottom waters were affected by the Yellow Sea Cold Water masses. Moreover, in the area where >20-μm PBSi prevailed, the silicate-to-nitrate ratio was less than 1 at most sampling stations, rendering silicate the limiting nutrient in this area. The PBSi/particulate organic carbon values in the surface waters of the study area ranged from 0.01 to 0.3. Areas exhibiting values exceeding 0.13 primarily clustered in nearshore waters, which was characterized by a dominance of large-sized (>20 μm) PBSi. The nearshore benthic waters exhibited anoxic conditions, where diatoms predominantly comprised the phytoplankton biomass and organic matter featured marine phytoplankton. Consequently, the proliferation of diatoms (siliceous phytoplankton) in the midupper water significantly contributed to the hypoxic conditions at the bottom, as diatoms underwent dissolution during sedimentation, leading to oxygen depletion.https://www.frontiersin.org/articles/10.3389/fmars.2025.1471650/fullChangjiang Estuaryparticulate biogenic silicasize-fractionated compositionparticulate organic carbonhypoxia |
| spellingShingle | Xizhen Liu Xizhen Liu Bin Wang Bin Wang Siyang Chen Haiyan Jin Haiyan Jin Yanpei Zhuang Zhibing Jiang Hongliang Li Hongliang Li Jianfang Chen Jianfang Chen The size-fractionated composition of particulate biogenic silica and its ecological significance in the Changjiang Estuary area Frontiers in Marine Science Changjiang Estuary particulate biogenic silica size-fractionated composition particulate organic carbon hypoxia |
| title | The size-fractionated composition of particulate biogenic silica and its ecological significance in the Changjiang Estuary area |
| title_full | The size-fractionated composition of particulate biogenic silica and its ecological significance in the Changjiang Estuary area |
| title_fullStr | The size-fractionated composition of particulate biogenic silica and its ecological significance in the Changjiang Estuary area |
| title_full_unstemmed | The size-fractionated composition of particulate biogenic silica and its ecological significance in the Changjiang Estuary area |
| title_short | The size-fractionated composition of particulate biogenic silica and its ecological significance in the Changjiang Estuary area |
| title_sort | size fractionated composition of particulate biogenic silica and its ecological significance in the changjiang estuary area |
| topic | Changjiang Estuary particulate biogenic silica size-fractionated composition particulate organic carbon hypoxia |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2025.1471650/full |
| work_keys_str_mv | AT xizhenliu thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT xizhenliu thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT binwang thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT binwang thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT siyangchen thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT haiyanjin thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT haiyanjin thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT yanpeizhuang thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT zhibingjiang thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT hongliangli thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT hongliangli thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT jianfangchen thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT jianfangchen thesizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT xizhenliu sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT xizhenliu sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT binwang sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT binwang sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT siyangchen sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT haiyanjin sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT haiyanjin sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT yanpeizhuang sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT zhibingjiang sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT hongliangli sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT hongliangli sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT jianfangchen sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea AT jianfangchen sizefractionatedcompositionofparticulatebiogenicsilicaanditsecologicalsignificanceinthechangjiangestuaryarea |