Spatial and temporal variations of available silica content in marsh soils under the <i>Spartina alterniflora</i> invasion in the Min River estuary

Hui, 高会 Gao; Shuijing, 翟水晶 Zhai; Zhigao, 孙志高 Sun; Tao, 何涛 He; Liping, 田莉萍 Tian; Xingyun, 胡星云 Hu

doi:10.5846/stxb201709041593

Cited by 2 publications

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“…Therefore, this provides a suitable area to study the differences between ecotones and typical community zones in the Min River estuary. Studies regarding Si in the Min River estuary marshes have mainly focused on soil and porewater in typical vegetation areas (Zhai & Xue, 2016; Hou et al, 2017; Gao et al, 2018), whereas Si cycling in transitional systems has been neglected. Previous studies have shown that biomass allocation and biogenic silica (BSi) stock in roots was higher in ecotones than in typical communities (Gao et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Differences in biomass and silica content in typical plant communities with ecotones in the Min River estuary of southeast China

Gao

Zhai

Sun

et al. 2019

PeerJ

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Silica (Si) is a basic nutrient requirement for many aquatic organisms and its biogeochemical cycle plays an important role in estuarine coastal ecosystems. However, little is known about the role Si plays during plant–plant interactive processes in the marsh ecosystems. Here, variations in biomass, biogenic silica (BSi) content, and available Si content of Cyperus malaccensis-dominated marshes, Phragmites australis-dominated marshes, and their ecotonal marshes were studied in the Shanyutan marsh in the Min River estuary, China. Results showed that C. malaccensis and P. australis biomass in ecotones was lower than those in typical communities by 46.4% and 46.3%, respectively. BSi content in aboveground organs of C. malaccensis and culms and roots of P. australis was lower in ecotones than in typical communities, whereas BSi content in other organs showed the opposite trend. Biomass allocation in C. malaccensis and P. australis roots in ecotones was higher by 56.9% and 19.5%, respectively, and BSi stock in C. malaccensis and P. australis roots was higher than that in typical communities by 120.9% and 18.9%, respectively. Available Si content in ecotonal marsh soils was 12.6% greater than that in typical communities. Thus, the two plant species may use different strategies for Si accumulation and allocation in ecotones to adapt to the competitive environment. P. australis may expand primarily via occupation of wider aboveground space, thereby increasing the Si accumulation capacity in aboveground organs. Meanwhile, C. malaccensis may increase the Si allocation capacity of its roots to withstand the pressure from P. australis. This study will provide new insights into marsh plant competition from the perspective of Si, which can also benefit plant management in marsh ecosystems.

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Section: Introductionmentioning

confidence: 99%

Differences in biomass and silica content in typical plant communities with ecotones in the Min River estuary of southeast China

Gao

Zhai

Sun

et al. 2019

PeerJ

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Simulation Analysis and Test of Edem-Based Twin Spiral Propeller for Mudflat Aquaculture

ZOU,

ZHANG,

ZHANG

et al. 2024

INMATEH

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Aiming at the problems of coastal ecological damage and low yield of mudflat aquaculture caused by the invasion of M. alterniflora, in order to improve the operational efficiency of mudflat wet and soft ground, and to promote the ecological balance and the development of coastal agriculture, a walking device with twin spiral propellers for muddy wet and soft ground was designed. Using EDEM simulation software to simulate and analyze, the discrete element model of muddy soil particles is established to analyze the interaction mechanism with the spiral propeller and the operation propulsion effect, and it is concluded that the spiral propeller will not produce congestion phenomenon during the operation; data are collected through several simulation tests, and the optimal parameter design of the spiral propeller structure is derived from the response surface analysis, and the spiral propeller is designed to operate at a speed of 2.416 mph in the simulation with the optimal parameter of structural design. The field test shows that the optimal height of the spiral blades is 50 mm, the total length of the drum is 2,970 mm, the helix angle of lift is 30 °, the pitch is 453 mm, and the propelling speed is 2.36 m/s. The data collected through several simulation tests are used to find the optimal parameter design of the spiral propeller structure, and the simulation speed of the spiral propeller in the optimal structural design parameter is 2.416 m/s.

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Spatial and temporal variations of available silica content in marsh soils under the Spartina alterniflora invasion in the Min River estuary

Cited by 2 publications

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Differences in biomass and silica content in typical plant communities with ecotones in the Min River estuary of southeast China

Differences in biomass and silica content in typical plant communities with ecotones in the Min River estuary of southeast China

Simulation Analysis and Test of Edem-Based Twin Spiral Propeller for Mudflat Aquaculture

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