Effects of environmental parameters on Lemna minor growth: An integrated experimental and modelling approach

Dyck, Isabelle Van; Vanhoudt, Nathalie; Batlle, J. Vives i; Horemans, Nele; Nauts, Robin; Gompel, Axel Van; Claesen, Jürgen; Vangronsveld, Jaco

doi:10.1016/j.jenvman.2021.113705

Cited by 12 publications

(7 citation statements)

References 29 publications

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“…Thus, the growth has to be described by the differential equation for limited growth and it yielded the best fit between modelled and measured data. In contrast to van Dyck et al. (2022) , the deviation of biomass prediction between model and laboratory set-up in this work is only about 1%.…”

Section: Discussioncontrasting

confidence: 58%

“…By the updated approach of Liebig's law of the minimum along the product rule, the modelling as such includes all relevant variables in one final step.The introduction of a discontinuous sawtooth curve for periodic partial harvesting into the analytical sigmoidal growth curve, describing the regrowth, resulted in an evidently better accuracy between experiments and model results. In contrast to van Dyck et al. (2022) , Petersen et al.…”

Section: Discussionmentioning

confidence: 93%

“…It is supported by the observation over three years of experiments that each variety results in a different capacity W max of the population under the same experimental conditions (light quality and quantity, nutrients, temperature, CO 2 ). For that reason, in the literature, the growth rates are in general indicated for a specific species, ( Khvatkov et al., 2018 ; asfar et al., 2007; Petersen et al., 2021 ; Petersen et al., 2022 ; van Dyck et al., 2022 ). As can be seen below, W max has to be inserted into the model as one of the most important parameters.…”

Section: Methodsmentioning

confidence: 99%

“…iv) supplemental CO 2 ( Raven et al., 1985 ) as related to the available photosynthetically active radiation (PAR). An already existing model approach ( Khvatkov et al., 2018 ; Lasfar et al., 2007 ; van Dyck et al., 2022 ) had to be refined further. In addition, the influence of periodic harvesting of the existing Lemna biomass had to be considered as it influences coverage and competition by algae.…”

Section: Introductionmentioning

confidence: 99%

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Modelling of Lemna minor L. growth as influenced by nutrient supply, supplemental light, CO2 and harvest intervals for a continuous indoor cultivation

Schmidt¹,

Goldbach²

2022

Heliyon

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Section: Discussioncontrasting

confidence: 58%

Section: Discussionmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modelling of Lemna minor L. growth as influenced by nutrient supply, supplemental light, CO2 and harvest intervals for a continuous indoor cultivation

Schmidt¹,

Goldbach²

2022

Heliyon

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“…In between, there are pH levels where the growth rate uctuates with signi cant differences. Like other environmental factors pH also showed a greater in uence on the growth rate of the plant [17]. Most researchers have shown that the growth of duckweeds including Lemna minor is rapid at pH 7 [18].…”

Section: Biomass Production and Growth Rate Analysismentioning

confidence: 99%

Evaluating the impact of pH on the growth and nutritional profile of Lemna minor L. (a sustainable alternative for Pakistan’s feed sector)

Ullah¹,

Gul

Khan

et al. 2022

Preprint

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Pakistan's conventional feed supply is rapidly depleting, forcing the country to turn to non-conventional sustainable feed to meet the demand of the livestock and fishery sectors. The current study investigates the effect of pH on the nutritional composition of Lemna minor L., a freshwater macrophyte and a potential alternative feed. Fronds were grown in a pH range of 4–10 and replicated three times. The growth rate was highest (90 gm− 2 Day− 1) at pH 7 while lowest (40 gm− 2 Day− 1) at pH 4. Protein content dropped sharply at pH 4, but the highest (31g/100g) was found at pH 7 and 8. The lipid fraction was high at pH (9,10), while low in acidic. Carbohydrate was maximum (59.3 g/100g dw). A higher level of Ca (34, 37,38 mg/100g dw) was observed in pH 5 and 6 while low content (24 mg/100g dw) in the control group. In contrast, the Mg level slightly increased with increasing pH while the maximum concentration (32 mg/100g dw) was observed at pH10 and in the control group. High Fe moiety (936mg/100g) was found at pH 5 and 6. Elevated Mn (3.0mg/100g) was seen at a slightly acidic pH. The lowest level of Mn, 1.7 mg/100 and 2.0 mg/100 were recorded at pH 9 and 10 respectively. The highest fraction of Zn (0.08mg/100g) was observed in pH 6 and 7 while the lowest Zn came at pH 9. The study concluded that Lemna minor grows best between pH 6–10 under the agroclimatic conditions of Pakistan with optimal nutritional profile.

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Seasonal dynamics of the standard test species Lemna sp. in outdoor microcosms

Arts,

van Smeden,

Wolters

et al. 2024

Integr Envir Assess & Manag

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Lemna L. sp. is a free‐floating aquatic macrophyte that plays a key role as a standard test species in aquatic risk assessment for herbicides and other contaminants. Population modeling can be used to extrapolate from laboratory to field conditions. However, there are insufficient data on longer‐term seasonal dynamics of this species to evaluate such models. Therefore, several long‐term growth experiments were conducted in outdoor microcosms (surface area 0.174 m2). Monitoring parameters included biomass, frond numbers, water parameters, and weather data. Three different datasets were generated: frond numbers and biomass from weekly to monthly destructively sampled microcosms; a year‐round dataset of frond numbers from five continuously monitored microcosms; and seasonal growth rates without the effect of density dependence over 1–2 weeks in freshly inoculated microcosms. Lemna sp. reached a maximum of approximately 500 000 fronds m−2 and 190 g dry weight m−2. During the first winter, the microcosms were covered by ice for approximately four weeks, and Lemna sp. populations collapsed. The second winter was warmer, without any ice cover, and Lemna sp. populations maintained high abundance throughout the winter. Dry weight per frond was not constant throughout the year but was highest in autumn and winter. Growth rates without density dependence under outdoor environmental conditions reached 0.29 day−1 for frond number, 0.43 day−1 for fresh weight, and 0.39 day−1 for dry weight. In linear regressions, these growth rates were best explained by water temperature. For the populations continuously monitored throughout a year, the nitrogen‐to‐phosphorus ratio best explained the growth rate of frond numbers. This study yielded a relevant dataset for testing and refining Lemna population models used in chemical risk assessment as well as for managing ecosystems and combating the effects of eutrophication. Integr Environ Assess Manag 2024;00:1–14. © 2024 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC).

show abstract

Effects of environmental parameters on Lemna minor growth: An integrated experimental and modelling approach

Cited by 12 publications

References 29 publications

Modelling of Lemna minor L. growth as influenced by nutrient supply, supplemental light, CO2 and harvest intervals for a continuous indoor cultivation

Modelling of Lemna minor L. growth as influenced by nutrient supply, supplemental light, CO2 and harvest intervals for a continuous indoor cultivation

Evaluating the impact of pH on the growth and nutritional profile of Lemna minor L. (a sustainable alternative for Pakistan’s feed sector)

Seasonal dynamics of the standard test species Lemna sp. in outdoor microcosms

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