The relationship between light intensity and nutrient uptake kinetics in six freshwater diatoms

Shi, Ping; Shen, Hong; Wang, Wenjing; Chen, Wenjie; Xie, Ping

doi:10.1016/j.jes.2015.03.003

Cited by 18 publications

(10 citation statements)

References 58 publications

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“…Diatoms can use physiological strategies to handle light fluctuations, but only for short periods. Furthermore, controlling light intensity can play an important role in reducing phytoplankton activity of phosphorus uptake and photosynthesis simultaneously because the optimum light intensity required for the growth of diatom is consistent with the required light intensity of high affinity for phosphorus absorption (Shi et al 2015). This provides a theoretical basis for controlling algal blooms through light management.…”

Section: Physiological Regulationmentioning

confidence: 95%

Photoacclimation in freshwater diatoms: interspecific and inter-habitat comparisons

Shi

Xie

Liu

et al. 2020

Journal of Freshwater Ecology

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Diatoms are a type of photosynthetic phytoplankton that can acclimate to the light level of their environment. Diatoms from different habitats exhibit different photoacclimation characteristics; those from relatively low-light intensity habitats present relatively high photosynthetic activity, high light-harvesting pigment (Chla) content, and low xanthophyll content. Conversely, diatoms from high-light intensity environments have lower photosynthetic activity, less Chla content, and efficient xanthophyll cycling. Hence, diatoms can maintain high growth and photosynthetic activity within a wide range of light intensities. Whether the mechanisms of such adaptability are a consequence of biological photoacclimation to different light intensities or interspecific differences is unknown. Here, we show that differences in photoacclimation ability are more significant than species differences. We found similar species compositions in lowand high-light habitats of the Hanjiang River, China; however, there were remarkable differences in rapid light-response curve parameters. The photoacclimation of algae and trends in their photosynthetic activity can be estimated by rapid detection techniques. We isolated three diatom species common to both habitats and grew them under various light intensities, finding that they have an excellent ability to acclimate to local light conditions. Diatoms can use physiological strategies to handle light fluctuations, but only for short periods. Our results provide a theoretical basis for controlling algal blooms through light management. With knowledge of the photoacclimation characteristics of diatoms and according to the availability of local water conservancy facilities, it is possible to use light management to control diatom blooms more efficiently than with conventional techniques, thereby reducing water usage.

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Section: Physiological Regulationmentioning

confidence: 95%

Photoacclimation in freshwater diatoms: interspecific and inter-habitat comparisons

Shi

Xie

Liu

et al. 2020

Journal of Freshwater Ecology

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“…nutrient uptake and growth of algae (Litchman et al, 2004;Shi et al, 2015;Minggat et al, 2021). Previous studies on phytoplankton growth mostly focused on the exponential phase while the lag growth phase was not fully considered.…”

Section: Spm Effects On Algae Growthmentioning

confidence: 99%

“…This can be attributed to (1) the presence of SPM attenuates the light, which is the energy source of photosynthesis, through scattering and absorbing processes (Kirk, 1985;Pierson et al, 2003;Bowers et al, 2009;Peng et al, 2009;Niimura et al, 2010;Liu et al, 2013a). (2) The uptake of nutrient was relatively lower in low light environments (Shi et al, 2015;Minggat et al, 2021), and nitrate reductase and nitrite reductase activities may also decrease under light stress (Li et al, 2004). (3) Some algae showed a physiological adaptation to light attenuation which involves increase in photosynthetic pigments and the changes in the macromolecular composition and ultrastructure of photosynthetic apparatus (Gilbes et al, 1996;MacIntyre et al, 2002;Kim et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The Effects of Suspended Particulate Matter, Nutrient, and Salinity on the Growth of Amphidinium carterae Under Estuary Environmental Conditions

Jiang

Tong

et al. 2021

Front. Mar. Sci.

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The environmental conditions in estuaries display distinct variability along the river-ocean mixing continuum from turbid, eutrophic freshwater to clear, oligotrophic offshore oceanic water. In order to understand the effects of suspended particulate matter (SPM), nutrient, and salinity on phytoplankton growth, this study investigated the response of a harmful dinoflagellate (Amphidinium carterae Hulburt) to the ecological gradients in estuary environments. Rapid nutrient uptake and growth of A. carterae were detected in the nutrient-rich clear water, while nutrient concentration had little impact on the cellular chlorophyll a (Chl-a) content at the stationary phase. Light attenuation caused by SPM not only inhibited the specific growth rate of A. carterae but also prolonged its adaption period in turbid water, resulting in a delayed and weakened growth response. The elevated cellular Chl-a content under high SPM conditions resulting from photo-acclimation led to the decoupling of cell density and Chl-a concentration, indicating that Chl-a is not a reliable indicator for phytoplankton abundance in turbid environments. The combined effect of SPM and nutrient on specific growth rate of A. carterae can be explained by the comparative effect model, while the multiplicative effect model better predicted their interactive effect on the growth inhibitory rate (GIR). There is a transit of dominant limiting factor for phytoplankton growth along the salinity gradient in estuary environments. Salinity (for marine phytoplankton cannot survive under low salinity condition) and SPM are the dominant limiting factors at low salinities in nearshore turbid environments, while nutrient depletion exerts the dominant inhibitory effect in high salinity offshore water. Depending on the balance between enhancing nutrient limitation and reducing light limitation with increasing salinity, blooms most likely occur in the “optimal growth region” at intermediate salinities where light and nutrient are both suitable for phytoplankton growth.

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“…Growth rates, nutrient uptake rates, and stress tolerance have been suggested to be key factors affecting interspecific algal competition. Environmental conditions such as the pH, nutrient concentration, residence time of lake water, temperature, and light intensity have also been recognized as important factors (Shi et al ). Although the effects of each factor on the domination of cyanobacteria or other species with respect to cell density have been investigated, studies examining the combined effects of these factors on their competition have been limited.…”

Section: Introductionmentioning

confidence: 99%

Competitive growth characteristics between Microcystis aeruginosa and Cyclotella sp. accompanying changes in river water inflow and their simulation model

Mikawa

Sugimoto

Amano

et al. 2016

Phycological Research

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Summary When the water quality in Lake Tega was the worst among Japanese lakes in the 1970s, cyanobacteria (mainly the genus Microcystis) were observed to be the dominant species in the summer. Since 2000, for water quality improvement, a large amount of the Tone River water was discharged into Lake Tega, resulting in an improvement in the water quality together with transition of algal dominant species from cyanobacteria to diatoms (mainly the genus Cyclotella). Although several factors including nutrient concentration and daily renewal rate (d) could have been related to the succession of algal dominant species, these effects have not been understood very well. This study investigated the effects of the daily renewal rate and nitrate‐nitrogen (hereafter nitrogen) concentration (N) on the competition between the cyanobacterium Microcystis aeruginosa and the diatom Cyclotella sp. through monoculture and monoxenic culture experiments. Based on the experimental results, a simulation model was constructed to predict the competitive growth pattern of each species. Monoxenic culture experiments showed that M . aeruginosa outcompeted Cyclotella sp. under conditions of N = 0.5 (1.0 mg‐N L−1) and d = 5, 15, and 20%. The domination of M . aeruginosa could be attributed to smaller values for the half‐saturation constant and the minimum nitrogen cell quota for this species with respect to Cyclotella sp. However, Cyclotella sp., possessing higher values of nitrogen cell quota and nitrogen uptake rate, dominated by an increasing nitrogen concentration (N = 1.0 mg L−1) and daily renewal rate (d = 30%). The competitive growth patterns of M . aeruginosa and Cyclotella sp. could roughly be predicted by the simulation model. These results suggested that the daily renewal rate as well as the nitrogen concentration, could affect the competition and be influential factors as to which species dominates between M . aeruginosa and Cyclotella sp.

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The relationship between light intensity and nutrient uptake kinetics in six freshwater diatoms

Cited by 18 publications

References 58 publications

Photoacclimation in freshwater diatoms: interspecific and inter-habitat comparisons

Photoacclimation in freshwater diatoms: interspecific and inter-habitat comparisons

The Effects of Suspended Particulate Matter, Nutrient, and Salinity on the Growth of Amphidinium carterae Under Estuary Environmental Conditions

Competitive growth characteristics between Microcystis aeruginosa and Cyclotella sp. accompanying changes in river water inflow and their simulation model

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