Response of phytoplankton community to nutrient enrichment in the subsurface chlorophyll maximum in Yellow Sea Cold Water Mass

Fu, Mingzhu; Wang, Zongling; Pu, Xinming; Qü, Ping; Li, Yan; Jiang, Meijie

doi:10.1016/j.chnaes.2015.09.007

Cited by 20 publications

(12 citation statements)

References 39 publications

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“…In the SYS, a unique hydrogeochemical regime of the YSCWM (Figure ) could promote redox cycling of Fe at the oxic‐anoxic interface of the sediments. The strongly stratified YSCWM serves as a source of nutrients to the surrounding water (Fu et al, ; X. Liu et al, ), which facilitates primary production in the subsurface layer of the water column (X. Liu et al, ) and consequently promotes marine OC export to the seabed. In addition, low temperature of the YSCWM may also favor OC export due to low efficiency of OC degradation in the water column (Song et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…For instance, sediment accumulation rate off the Shandong Peninsula is 0.68 cm/a, but decreases southward to 0.21–0.23 cm/a in the muddy area of the SYS central basin (S. Yang & Youn, ). The Yellow Sea Cold Water Mass (YSCWM) is a unique hydrologic phenomenon in the central SYS (Figure ), which is characterized by strong stratification and very low temperature (< 10 °C) in the deep water in summer, and serves as a source of nutrients to the surrounding water (Fu et al, ; X. Liu et al, ).…”

Section: Study Site and Samplingmentioning

confidence: 99%

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Reactive Iron and Iron‐Bound Organic Carbon in Surface Sediments of the River‐Dominated Bohai Sea (China) Versus the Southern Yellow Sea

et al. 2019

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Factors influencing reactive Fe cycling and its protection of organic carbon (OC) in sediments are poorly understood. Here we comparatively study Fe speciation and Fe‐associated OC (Fe‐OC) in surface sediments of the Bohai Sea (BHS) and southern Yellow Sea (SYS), two seas with common sediment sources but different depositional regimes. Though significant sequestration of highly reactive Fe (FeHR) is expected in the estuarine system stream from the river‐dominated BHS, this pool is, however, slightly enriched in the BHS sediments relative to their source material. This reconfirms a previous speculation of sedimentary FeHR enrichment in semi‐protected settings. Relative to the BHS, the SYS sediments are depleted of FeHR, despite common sediment sources of these two areas. Estuarine pre‐enrichment and subsequent redistribution of FeHR in the BHS, and aging of Fe‐bearing authigenic clays during transport from the BHS to the SYS are potential mechanisms for the depletion. The fractions (fFe‐OC) of Fe‐OC in total OC in sediments of the two seas are at the lower end for soils and sediments, indicating Fe being a minor “rusty sink.” 13CFe‐OC fractionations indicate preferential sequestration of terrestrial OC by Fe oxides in the BHS, in contrast with preferential retention of marine OC in the SYS. Different fractionations of 13CFe‐OC in the two seas are a net result of selective adsorption of OC by Fe oxides and selective stabilization of OC during Fe reductive dissolution. Preferential sequestration of terrestrial OC may exert an important influence on distribution and compositions of OC buried in the river‐dominated system.

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Section: Discussionmentioning

confidence: 99%

Section: Study Site and Samplingmentioning

confidence: 99%

Reactive Iron and Iron‐Bound Organic Carbon in Surface Sediments of the River‐Dominated Bohai Sea (China) Versus the Southern Yellow Sea

et al. 2019

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“…The YSCWM is also characterized by a sharp temperature difference between the sea surface and the bottom with a maximum depth less than 80 m (e.g., >15 °C; Lee et al, ). The existence of the YSCWM not only dominates the hydrographic features but also has significant effects on the biomass and production of phytoplankton in the YS (Chen et al, ; Fu et al, ; Hur et al, ; Lie et al, ).…”

Section: Introductionmentioning

confidence: 99%

Revealing the Subsurface Yellow Sea Cold Water Mass from Satellite Data Associated with Typhoon Muifa

Yang

et al. 2019

JGR Oceans

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A significant sea surface temperature (SST) drop was clearly identified to be confined exactly over the Yellow Sea Cold Water Mass (YSCWM) from satellite‐derived SSTs during Typhoon Muifa's passage over the Yellow Sea (YS) in early August 2011. With a simple one‐dimensional mixed‐layer model (Price‐Weller‐Pinkel [PWP]), the mixed‐layer heat budget diagnosis concluded that the entrainment term, rather than the surface heat flux term that usually dominates over the open ocean, was the dominant process for the significant SST cooling over the YSCWM. The PWP‐based experiments were conducted to set up one lookup table including the SST drop, wind speed, and subsurface temperature gradient, from which the YSCWM's intensity (represented by the subsurface temperature gradient) can be easily found with the satellite wind and SST measurements during the typhoon passage over the YS. This YSCWM‐anchored significant SST drop provides a promising possibility to detect the YSCWM intensity and extent, which have generally been poorly sampled to date.

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“…Under the influence of topography and seasonal variations in the East Asian monsoon and associated hydrodynamics, a noticeably large area of cold water mass, bordered by a 10 °C isotherm in the trough is found in the bottom water during the summer half year, which is called the Yellow Sea Cold Water Mass (YSCWM). For decades, numerous studies have focused on the formation mechanisms and physical dynamics of the YSCWM (Feng et al, ; He et al, ; Oh et al, ; Park et al, ; Yu et al, ; Zhang et al, ; Zhu et al, ), and have highlighted vertical variations in nutrients and oxygen (Wang et al, ; Wei, Yu, et al, ; Xin et al, ) and consequently in biological communities over the water column (Bai et al, ; Fu et al, ; Liu et al, , ). The impact that the YSCWM has on PSCs has been mostly studied through in situ data collection and analysis (Fu et al, , ).…”

Section: Introductionmentioning

confidence: 99%

Twenty‐Year Variations in Satellite‐Derived Chlorophyll‐a and Phytoplankton Size in the Bohai Sea and Yellow Sea

et al. 2019

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Phytoplankton cell size is a useful ecological indicator for evaluating the response of phytoplankton community structure to environmental changes. Ocean-color remote observations and algorithms have allowed us to estimate phytoplankton size classes (PSCs) at decadal scale, helping us to understand their trends under ocean warming. Here a large data set of pigments, derived through high performance liquid chromatography, was collected in the Bohai Sea (BS) and Yellow Sea (YS) between 2014 and 2016. The data set was used to reparametrize the sea surface temperature (SST)-dependent threecomponent model of Brewin et al. (2017) to the region. The model was validated using independent in situ data set and subsequently applied to satellite chlorophyll-a data from Ocean Colour Climate Change Initiative, spanning from 1997 to 2016, to derive percentages of three PSCs to total chlorophyll-a. Monthlyaveraged PSCs exhibited spatial-temporal variations in the study area, linked to topography, temperature, solar radiation, currents, and monsoonal winds. In the surface central south Yellow Sea (SYS), influenced by bottom Yellow Sea Cold Water Mass, tight relationships between PSCs and environmental factors were observed, where high SST, high sea level anomaly, low mixed-layer depth, and low wind speed resulted in higher proportions of nanoplankton and picoplankton from June to October. Significant interannual anomlies in PSCs were found associated with El Niño events in the central SYS, related to anomalies in SST. The refined model characterized 20-year variations in chlorophyll-a concentration and PSCs in complicated optical, hydrodynamic, and biogeochemical environments in the BS and YS.Plain Language Summary Phytoplankton are the fundamental component of the marine ecosystem, and the size structure of phytoplankton influences many processes in phytoplankton biology, marine ecology, and marine biogeochemistry. Phytoplankton can be divided into three phytoplankton size classes (PSCs): microplankton (>20 μm), nanoplankton (2-20 μm), and picoplankton (<2 μm). The Bohai Sea (BS) and Yellow Sea (YS) are shallow marginal seas in the northwest Pacific Ocean, strongly impacted by large river plumes, ocean processes, and seasonal monsoons, supporting high primary and fishery productivity. Using a 20-year time series satellite ocean color data from 1997 to 2016, and a SSTdependent model that links chlorophyll-a concentration to the size structure of phytoplankton, we observe spatial and temporal variations of PSCs in the BS and YS and tight correlations between the size structure and physical variables in the central south Yellow Sea. Interannual variations in the PSCs are coupled with changes of sea surface temperature in El Niño events. Our results demonstrate that variations in the phytoplankton size structure are coupled with changes in climate variability, with implications for how the regional ecosystem may change with predicted changes in climate.

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Response of phytoplankton community to nutrient enrichment in the subsurface chlorophyll maximum in Yellow Sea Cold Water Mass

Cited by 20 publications

References 39 publications

Reactive Iron and Iron‐Bound Organic Carbon in Surface Sediments of the River‐Dominated Bohai Sea (China) Versus the Southern Yellow Sea

Reactive Iron and Iron‐Bound Organic Carbon in Surface Sediments of the River‐Dominated Bohai Sea (China) Versus the Southern Yellow Sea

Revealing the Subsurface Yellow Sea Cold Water Mass from Satellite Data Associated with Typhoon Muifa

Twenty‐Year Variations in Satellite‐Derived Chlorophyll‐a and Phytoplankton Size in the Bohai Sea and Yellow Sea

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