Application of biologic silicon in modern sedimentary section to reconstruction of phytoplankton changes in the East China Sea and the Huanghai Sea during last 200 years

Yang, Qian; Song, Xianli; Sun, Yongge; Huang, Jiansheng

doi:10.1007/s13131-012-0193-0

Cited by 9 publications

(2 citation statements)

References 2 publications

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“…In general, zooplankton size is positively correlated with prey size to ensure high feeding efficiency (Brun et al 2016 ; Hansen et al 1994 ). Unfortunately, there was no size-fractioned phytoplankton information (e.g., abundance, biomass) available for this study, but it has been well documented in other studies in SYS (e.g., Deng et al 2008 ; Fu et al 2010 ; Huang et al 2006 ) that size structure is mainly driven by nutrient conditions. For example, it has been found that seasonal changes in nutrient conditions impact the shapes and size structure of phytoplankton and zooplankton in YSCWM (Fu et al 2010 ; Huang et al 2006 ; Huo et al 2012 ; Shi et al 2015 ; Wang et al 2003 ).…”

Section: Discussionmentioning

confidence: 96%

Trait-based approach revealed the seasonal variation of mesozooplankton functional groups in the South Yellow Sea

Zhang

Chen

et al. 2023

Mar Life Sci Technol

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Functional traits determine the fitness of organisms and mirror their ecological functions. Although trait-based approaches provide ecological insights, it is underexploited for marine zooplankton, particularly with respect to seasonal variation. Here, based on four major functional traits, including body length, feeding type, trophic group, and reproduction mode, we quantified the seasonal variations of mesozooplankton functional groups in the South Yellow Sea (SYS) in the spring, summer, and autumn of 2018. Strong seasonal dynamics were identified for all traits but patterns varied among traits. Small zooplankton (47.7–88.6%), omnivores–herbivores (81.3–97.6%), and free spawners (54.8–92.5%) dominated in three seasons, while ambush feeders and current feeders dominated in spring (45.7%), and autumn (73.4%), respectively. Cluster analysis of the functional traits showed that the mesozooplankton in the SYS can be classified into eight functional groups. The biogeographic and seasonal variations of functional groups can be partially explained by environmental drivers. Group 1, represented by omnivores–herbivores, was the most dominant functional group, the abundance of which peaked in spring and was positively correlated with chlorophyll a concentration, indicating its close association with phytoplankton dynamics. The contribution of giant, active ambush carnivores, passive ambush carnivore jellyfish, current omnivores–detritivores, and parthenogenetic cladocerans increased with sea surface temperature. The proportion of giant, active ambush carnivores and active ambush omnivore–carnivore copepods decreased with salinity in autumn. This study presents a new perspective for understanding the dynamics of zooplankton and paves the way for further research on the functional diversity of zooplankton in the SYS.

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Section: Discussionmentioning

confidence: 96%

Trait-based approach revealed the seasonal variation of mesozooplankton functional groups in the South Yellow Sea

Zhang

Chen

et al. 2023

Mar Life Sci Technol

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“…Yangtze River (Yang et al, 2012;Cao et al, 2017). Since 1950, the sediment flux from the Yangtze River to the East China Sea was mostly dominated by human activities (Yang et al, 2006;Wang et al, 2008), with 50% of sediments (390.0 × 10 6 t yr -1 ) buried in the mud area (Qiao et al, 2017).…”

Section: B a Figurementioning

confidence: 99%

Carbon stocks in the mud areas of the Chinese marginal seas

Ma,

Xiao,

Ding

et al. 2023

Front. Mar. Sci.

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Continental marginal seas are key systems in the global carbon cycle. Carbon stocks represent the ability to store carbon, thus quantifying the carbon stocks in marine sediments would help to better understand their importance in the carbon cycle. In this study, 17 sediment cores in the mud areas of the South Yellow Sea and the East China Sea were measured for total organic carbon (TOC) and its stable isotope (δ13C), and dry bulk density; and from which the carbon stocks and carbon stock accumulation rate as well as marine/terrestrial carbon stocks/carbon stock accumulation rate were calculated. The carbon stocks in the mud area of the South Yellow Sea showed a decreasing trend during 1855 to 1950 caused by the relocation of the Yellow River Estuary in 1855, but increased after 1950s due to increased sediment input via the enhancement of South Shandong Coastal Current. In the Min-Zhe belt of the East China Sea, carbon stocks showed an overall high marine proportion due to the phytoplankton bloom induced by high nutrient level, but the decreased carbon stocks in recent decades were mainly caused by the construction of reservoirs in the Yangtze River that reduced sediment transports. The average carbon stocks in 1 m sediments from the South Yellow Sea (45.2 t ha-1) and Min-Zhe belt (52.8 t ha-1) were low compared to that of global marine sediments (66.6 t ha-1), while the carbon stock accumulation rate showed much higher values (0.1 t ha-1 yr-1 in South Yellow Sea and 0.31 t ha-1 yr-1 in the Min-Zhe belt) because of higher sedimentation rates. Although carbon stocks of Chinese marginal seas were also lower than that of the tidal flats (70.7 t ha-1) and wetland (123.6 t ha-1) in China, their much larger area could store 0.75 Pg C in marine sediments. Our temporal records suggest that anthropogenic activities have reduced carbon stocks in the marginal seas since 1950, causing carbon to re-enter the atmosphere to impact climate changes.

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Evidence of bottom-up effects of climate on Japanese anchovy (Engraulis japonicus) in the western North Pacific

Tang

Ito

et al. 2021

J Oceanogr

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Application of biologic silicon in modern sedimentary section to reconstruction of phytoplankton changes in the East China Sea and the Huanghai Sea during last 200 years

Cited by 9 publications

References 2 publications

Trait-based approach revealed the seasonal variation of mesozooplankton functional groups in the South Yellow Sea

Trait-based approach revealed the seasonal variation of mesozooplankton functional groups in the South Yellow Sea

Carbon stocks in the mud areas of the Chinese marginal seas

Evidence of bottom-up effects of climate on Japanese anchovy (Engraulis japonicus) in the western North Pacific

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