Turbulence exerts nutrients uptake and assimilation of bloom-forming Dolichospermum through modulating morphological traits: Field and chemostat culture studies

Zhang, Shuqing; Yan, Xiangwu; Li, Zhe; Wang, Shu; Guo, Jinsong; Lu, Lunhui

doi:10.1016/j.scitotenv.2019.03.328

Cited by 12 publications

(2 citation statements)

References 48 publications

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“…Very recent research has demonstrated that cell chains of the diatom genera Skeletonema and Chaetoceros increased their carbon assimilation in turbulent shear conditions 44 . The bloom-forming and toxic cyanobacterium Dolichospermum is also able to increase its nutrient uptake in more livid hydrodynamical conditions 45 .…”

Section: Discussionmentioning

confidence: 99%

Oscillations in the near-field feeding current of a calanoid copepod are useful for particle sensing

Giuffre

Hinow

Jiang

et al. 2019

Sci Rep

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Calanoid copepods are small crustaceans that constitute a major element of aquatic ecosystems. Key to their success is their feeding apparatus consisting of sensor-studded mouth appendages that are in constant motion. These appendages generate a feeding current to enhance the encounter probability with food items. Additionally, sensing enables the organism to determine the position and quality of food particles, and to alter the near-field flow to capture and manipulate the particles for ingestion or rejection. Here we observe a freely swimming copepod Leptodiaptomus sicilis in multiple perspectives together with suspended particles that allow us to analyse the flow field created by the animal. We observe a highly periodic motion of the mouth appendages that is mirrored in oscillations of nearby tracer particles. We propose that the phase shift between the fluid and the particle velocities is sufficient for mechanical detection of the particles entrained in the feeding current. Moreover, we propose that an immersed algal cell may benefit from the excitation by increased uptake of dissolved inorganic compounds.

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Section: Discussionmentioning

confidence: 99%

Oscillations in the near-field feeding current of a calanoid copepod are useful for particle sensing

Giuffre

Hinow

Jiang

et al. 2019

Sci Rep

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“…The risk of HABs in the backwater area of tributaries has been increasing in spring, summer, and autumn after the impoundment of the TGR [39,40]. It reported that the main reasons for HABs in the TGR are thermal stratification, increased euphotic depth [41][42][43], and the nutrients releasing after soil submergence. The period of water discharge from the TGR between early spring and early summer is consistent with the sensitive period for the recruitment of algal resting stages and the outbreak of HABs.…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Variations in Phytoplankton Communities in Sediment and Surface Water as Reservoir Drawdown—A Case Study of Pengxi River in Three Gorges Reservoir, China

Ouyang

Yang

et al. 2021

Water

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The resting stages of phytoplankton are usually regarded as the seed bank and source of harmful algal blooms because of the recruitment of phytoplankton from sediment to the water column under suitable environmental conditions. Information about resting stages of phytoplankton is abundant in shallow lakes and littoral sea; yet, studies on river–reservoir systems are rare. The river–reservoir continuum shows a unique structuring of longitudinal gradients of hydrological and hydrodynamic conditions. We hypothesized that the seed bank and algal blooms in reservoirs are influenced by the hydrodynamic conditions of each reservoir. We used Illumina Miseq sequencing to examine the spatio-temporal variation in the phytoplankton community in the sediment as reservoir drawdown and in surface water during algal blooms in Pengxi River, a tributary of China’s Three Gorges Reservoir. The results show that the cyanobacteria community in sediment is significantly influenced by temperature, total carbon, maximum flow velocity, and total phosphorous, the eukaryotic phytoplankton community in sediment is significantly influenced by total phosphorous, temperature, total carbon, maximum flow velocity, and total nitrogen. Additionally, the dominant species in sediment is significantly different from that in surface water during algal blooms. Our results suggest that the dominant species in surface water during algal blooms is more influenced by the environmental factors and hydrodynamic conditions in the water column than the seeds in the sediment. These findings are fundamental for further research on the influence of hydrodynamic conditions on algal blooms in artificially regulated river-reservoir systems.

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Curved filaments of Aulacoseira complex as ecological indicators in the Pearl River, China

Wang

Liu

et al. 2020

Ecological Indicators

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Turbulence exerts nutrients uptake and assimilation of bloom-forming Dolichospermum through modulating morphological traits: Field and chemostat culture studies

Cited by 12 publications

References 48 publications

Oscillations in the near-field feeding current of a calanoid copepod are useful for particle sensing

Oscillations in the near-field feeding current of a calanoid copepod are useful for particle sensing

Spatio-Temporal Variations in Phytoplankton Communities in Sediment and Surface Water as Reservoir Drawdown—A Case Study of Pengxi River in Three Gorges Reservoir, China

Curved filaments of Aulacoseira complex as ecological indicators in the Pearl River, China

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