Effects of small-scale turbulence on the growth of two diatoms of different size in a phosphorus-limited medium

Peters, Francesc; Arı́n, Laura; Marrasé, Cèlia; Berdalet, Elisa; Sala, M. Montserrat

doi:10.1016/j.jmarsys.2005.11.012

Cited by 76 publications

(73 citation statements)

References 37 publications

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“…Previous research showed that APAs are affected by cell size [23] and that turbulence increased APA more significantly in T. pseudonana (6 μm in diameter) than in Coscinodiscus sp. (109 μm in diameter) [52]. In our study, however, this so-called cell size dependence was not observed.…”

Section: Growth and Nutrient Strategies Of Diatoms Under Turbulent Cocontrasting

confidence: 88%

“…In addition, turbulence is another factor that can influence APA in diatoms, and the response to turbulence differed markedly between Coscinodiscus sp. and T. pseudonana [52]. This implies that nutrient strategies play an important role in phytoplankton dominance.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 95%

“…Nutrient uptake kinetics of phytoplankton is important for understanding competition, succession, and dominance in natural phytoplankton communities [11]. Many studies have reported that environmental factors such as turbulence [52], temperature [46], light intensity, and nutrient concentration [14] affect rates of P uptake in algae. Appropriate turbulence may be beneficial for phytoplankton by increasing the diffusion rate of nutrients to the cell surface [29].…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

“…Different algae exhibit different nutrient uptake traits in terms of their responses to turbulent conditions. Peters et al [52] showed that the phosphate uptake rate in the marine diatom Coscinodiscus sp. was increased by small-scale turbulence while the uptake rate in the diatom Thalassiosira pseudonana was unaffected.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

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Can Hydrodynamics Change Phosphorus Strategies of Diatoms?—Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems

2011

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Diatom blooms occur in many water bodies worldwide, causing significant ecological and social concerns. In order to understand the mechanisms of diatom blooms formation, the effects of varying phosphorus (P) concentration and hydrodynamics on the growth of diatoms were studied by combining results from field observations and laboratory experiments. The field investigation showed that spring diatom blooms (Cyclotella meneghiniana and Stephanodiscus hantzschii) occurred in Lake Taihu and Hanjiang River with similar environmental factors such as water temperature, pH, and dissolved oxygen in 2008. Concentrations of total phosphorus (TP), total nitrogen, and ammonia nitrogen (NH 4 -N) in Lake Taihu were significantly higher than the concentrations in the Hanjiang River. Laboratory experiments were conducted to evaluate growth and physiological responses of four lotic diatoms (Cyclotella atomus, Fragilaria crotonensis, Nitzschia palea, and S. hantzschii, isolated from the Hanjiang River) and three lentic diatoms (C. meneghiniana, Melosira varians, and Stephanodiscus minutulus, isolated from Lake Taihu, Lake Donghu, and Guanqiao Pond, respectively) to various P concentrations under smallscale turbulent and standing conditions. Our results showed that, with turbulence, lotic diatoms C. atomus, F. crotonensis, N. palea, and S. hantzschii demonstrated a significant increase in affinity for P compared with lentic diatoms C. meneghiniana, M. varians, and S. minutulus. Moreover, lotic diatoms C. atomus, F. crotonensis, and N. palea had higher growth rates and photosynthetic efficiencies with small-scale turbulence than with standing conditions both in P-limited and P-replete conditions. Lotic species S. hantzschii and three lentic diatoms (C. meneghiniana, M. varians, and S. minutulus) grew well under standing conditions. Our results may explain our field observation that the occurrence of diatom blooms in lakes is often associated with higher TP concentrations whereas in rivers, diatom blooms occur at a wide range of TP concentrations under flows. Therefore, different hydrodynamics and nutrient concentrations determined the dominant diatom species, according to their habitat-dependent physiological characteristics.

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Section: Growth and Nutrient Strategies Of Diatoms Under Turbulent Cocontrasting

confidence: 88%

Section: Electronic Supplementary Materialsmentioning

confidence: 95%

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

See 2 more Smart Citations

Can Hydrodynamics Change Phosphorus Strategies of Diatoms?—Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems

2011

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“…Furthermore, since their culture vessels are flushed numerous times per hour to maintain stable pH in the presence of photosynthesis and calcification, this flow-through setup is not suitable for slow growing phytoplankton cultures. Therefore, we chose to bubble our cultures with CO 2 -enriched air as recommended by Gatusso and Lavigne [14], despite some reports of adverse effects of small-scale turbulence on the growth rates of delicate taxa [40][41][42]. To avoid damage by bubbling of fragile species, the CO 2 -enriched air can be continuously pumped into the headspace and will equilibrate from there into the underlying culture medium, especially when some form of agitation is provided.…”

Section: Discussionmentioning

confidence: 99%

Development of a Continuous Phytoplankton Culture System for Ocean Acidification Experiments

Wynn‐Edwards

King

Kawaguchi

et al. 2014

Water

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Abstract:Around one third of all anthropogenic CO 2 emissions have been absorbed by the oceans, causing changes in seawater pH and carbonate chemistry. These changes have the potential to affect phytoplankton, which are critically important for marine food webs and the global carbon cycle. However, our current knowledge of how phytoplankton will respond to these changes is limited to a few laboratory and mesocosm experiments. Long-term experiments are needed to determine the vulnerability of phytoplankton to enhanced pCO 2 . Maintaining phytoplankton cultures in exponential growth for extended periods of time is logistically difficult and labour intensive. Here we describe a continuous culture system that greatly reduces the time required to maintain phytoplankton cultures, and minimises variation in experimental pCO 2 treatments over time. This system is simple, relatively cheap, flexible, and allows long-term experiments to be performed to further our understanding of chronic responses and adaptation by phytoplankton species to future ocean acidification.

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Turbulence effects on phytoplankton morphofunctional traits selection

Fraisse

Bormans

Lagadeuc

2015

Limnology & Oceanography

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Turbulence can regulate phytoplankton community structure in aquatic ecosystems by affecting sedimentation and nutrient acquisition. In rivers, nutrient concentrations are often high enough to sustain phytoplankton growth without limitation. Hence, turbulence mainly acts on phytoplankton by controlling its vertical position in such ecosystems. We conducted a laboratory experiment to see if the response of phytoplankton to turbulence could be predicted from morphofunctional traits related to sinking velocity and maximum growth rate. Turbulence was generated by horizontally oscillating grid systems in three 5 L chambers, which also constituted three chemostats. Two turbulence levels typical of lowland rivers (E 5 7.9 3 10 25 m 2 s 23 and E 5 7.8 3 10 23 m 2 s 23 ) were tested on an experimental community composed of six species from different taxonomic lineages. The species selected displayed different values for five morphofunctional traits related to sinking velocity and maximum growth rate (S : V ratio, algal unit size, density, shape, and motility). We showed that community structure could be partly predicted from morphofunctional traits. Under low turbulence (LT) (E 5 7.9 3 10 25 m 2 s 23 ), species displaying traits leading to high sinking velocity (i.e., large size and high density) were unable to sustain stable populations, whereas species which displayed the opposite traits (i.e., small size, flattened shape, or low density) dominated the community. Furthermore, one of the six species exhibited phenotypic plasticity in size and could adapt to both high and LT conditions.

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Effects of small-scale turbulence on the growth of two diatoms of different size in a phosphorus-limited medium

Cited by 76 publications

References 37 publications

Can Hydrodynamics Change Phosphorus Strategies of Diatoms?—Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems

Can Hydrodynamics Change Phosphorus Strategies of Diatoms?—Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems

Development of a Continuous Phytoplankton Culture System for Ocean Acidification Experiments

Turbulence effects on phytoplankton morphofunctional traits selection

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