Effects of high nitrogen concentrations on the growth of submersed macrophytes at moderate phosphorus concentrations

Yu, Qing; Wang, Hongzhu; Li, Yan; Shao, Jianchun; Liang, Xinmiao; Jeppesen, Erik; Wang, Haijun

doi:10.1016/j.watres.2015.06.053

Cited by 64 publications

(35 citation statements)

References 43 publications

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“…But our results were partly contrary to the report, which may be related to low growth rate and high nutrient concentration. For example, the average growth rate of P. maackianus (15d) was higher than that of P. maackianus (30d) (Figure S.1), which also indicated eutrophication can hamper growth of submerged macrophytes (Moss et al, 2012;Yu et al, 2015). In addition, P. maackianus (15d) and P. maackianus (30d) had opposite relationships between tissue N:P ratio and growth rate (Figures 1 and 2).…”

Section: Discussionmentioning

confidence: 94%

Growth rate, protein:RNA ratio and stoichiometric homeostasis of submerged macrophytes under eutrophication stress

Xing

Shi

Liu

et al. 2016

Knowl. Manag. Aquat. Ecosyst.

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-Growth rate hypothesis (GRH) and stoichiometric homeostasis of photoautotrophs have always been questioned. However, little is known about GRH and stoichiometric homeostasis of aquatic plants, especially submerged macrophytes. Therefore, we aim to test the GRH and explore stoichiometric homeostasis of four freshwater submerged macrophytes under eutrophication stress. At the single species level and the multi-species level, N:P ratios of Potamogeton maackianus, Myriophyllum spicatum, Vallisneria natans and Ceratophyllum demersum had no consistent trends with growth rates. However, protein:RNA ratios of P. maackianus, M. spicatum and V. natans all correlated negatively with growth rates, demonstrating GRH can apply to freshwater submerged macrophytes, even though they are threatening by eutrophication stress. Protein:RNA ratios positively correlated with N:P ratios in culture media and tissues in submerged macrophytes except in P. maackianus (30d), suggesting effects of varying N:P ratios in culture media on protein:RNA ratios are basically in concert with tissue N:P ratios under short-time eutrophication stress. Stoichiometric homeostasis coefficients (H N:P ) indicated submerged macrophytes have weak homeostasis. Stoichiometric homeostasis of V. natans was stronger than those of P. maackianus, M. spicatum and C. demersum. The differences in GRH and homeostasis of the four submerged macrophytes may be due to species traits. Key-words: growth rate hypothesis / stoichiometric homeostasis / N:P ratio / protein:RNA ratio / submerged macrophytes / eutrophication stress Résumé -Taux de croissance, rapport protéines : ARN, et homéostasie stoechiométrique de macrophytes submergés sous un stress d'eutrophisation. L'hypothèse du taux de croissance (GRH) et l'homéostasie stoechiométrique des photoautotrophes ont toujours été remises en question. Les plantes aquatiques, les macrophytes submergés en particulier, ont reçu moins d'attention parce qu'ils sont stressés par l'eutrophisation dans le monde entier. Ici, nous voulons tester la GRH et étudier l'homéostasie stoechiométrique de quatre macrophytes submergés d'eau douce sous le stress de l'eutrophisation. Au niveau d'une seule espèce et au niveau multi-spécifique, les rapports N:P de Potamogeton maackia, Myriophyllum spicatum, Vallisneria natans et Ceratophyllum demersum n'ont aucune relation avec les taux de croissance. Cependant, les rapports protéines:ARN de P. maackianus, M. spicatum et V. natans sont tous négativement corrélés avec les taux de croissance, ce qui démontre que la GRH peut s'appliquer aux macrophytes submergés d'eau douce, même s'ils sont menacés par le stress de l'eutrophisation. Les rapports protéines:ARN sont positivement corrélés aux rapports N:P dans les milieux de culture et les tissus des macrophytes submergés, sauf dans P. maackianus (30d), suggérant que les effets de rapports N:P variables en milieu de culture sont essentiellement associés aux rapports N:P des tissus sous contrainte d'eutrophisation de courte durée. Les résultats de H ...

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Section: Discussionmentioning

confidence: 94%

Growth rate, protein:RNA ratio and stoichiometric homeostasis of submerged macrophytes under eutrophication stress

Xing

Shi

Liu

et al. 2016

Knowl. Manag. Aquat. Ecosyst.

View full text Add to dashboard Cite

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“…In the experiment conducted by Yu et al (2015) during the months December to May (a relatively cold period and mainly the low-growth season), leaf length and leaf dry mass were found to decline with increasing concentrations of total nitrogen and ammonium. How macrophyte growth will respond to high nitrogen concentrations in the growing season is less clear (see Fig.…”

Section: Introductionmentioning

confidence: 96%

“…Experimental studies have revealed that ammonium (NH 4 )-related physiological stress may be aggravated by low light conditions . However, there is little agreement on the relative importance of these two effects of high nitrogen concentrations on submersed macrophytes compared with the effects of phosphorus that stimulates shading by enhancing phytoplankton or periphyton growth (Moss et al, 2013;Yu et al, 2015). Little attention has been paid to the varied effects of high nitrogen concentrations and the potential factors inducing such variation.…”

Section: Introductionmentioning

confidence: 99%

“…Toxic effects, for example, have been found to play a key role in acute tests, whereas shading effects from algae have been emphasized in long-term chronic tests Olsen et al, 2015;Zhao et al, 2016). In a long-term whole-ecosystem experiment carried out in 10 ponds in the lowgrowth season, shading by phytoplankton was identified as the main cause of declined plant growth, and toxic stress induced by high N levels may to a certain extent have negative effects (Yu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Does the responses of Vallisneria natans (Lour.) Hara to high nitrogen loading differ between the summer high-growth season and the low-growth season?

Wang

et al. 2017

Science of The Total Environment

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“…In freshwater ecosystems, high levels of human-generated ammonia (NH 4 + ), nitrite (NO 2 − ), and nitrate (NO 3 − ) may produce harmful effects on aquatic organisms (Constable et al, 2003;Camargo et al, 2005;Camargo and Álonso, 2006;Yu et al, 2015). Ammonia is believed to be most toxic in its un-ionized form (NH 3 ) and less so or non-toxic in its ionic form (NH 4 + ) (Camargo and Álonso, 2006;USEPA, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effects of high ammonia concentrations on three cyprinid fish: Acute and whole-ecosystem chronic tests

Wang

Xiao

Wang

et al. 2017

Science of The Total Environment

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Effects of high nitrogen concentrations on the growth of submersed macrophytes at moderate phosphorus concentrations

Cited by 64 publications

References 43 publications

Growth rate, protein:RNA ratio and stoichiometric homeostasis of submerged macrophytes under eutrophication stress

Growth rate, protein:RNA ratio and stoichiometric homeostasis of submerged macrophytes under eutrophication stress

Does the responses of Vallisneria natans (Lour.) Hara to high nitrogen loading differ between the summer high-growth season and the low-growth season?

Effects of high ammonia concentrations on three cyprinid fish: Acute and whole-ecosystem chronic tests

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