Indirect effects of extreme precipitation on the growth of Vallisneria denseserrulata Makino

Yongwei Zhi; Yu Cao; Junyao  Sun; Wei  Li; Erik Jeppesen

doi:10.1016/j.envexpbot.2018.06.003

Indirect effects of extreme precipitation on the growth of Vallisneria denseserrulata Makino

Yongwei Zhi, Yu Cao, Junyao Sun, Wei Li, Erik Jeppesen

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

12 Citations (Scopus)

Abstract

Submerged macrophytes are important for maintaining a clear water state in shallow lakes but are now threatened by the ongoing climate changes involving more extreme weather events. We explored the effects of extreme precipitation (higher water level, higher loading of nutrients (phosphorus and nitrogen)) on the growth of the submerged macrophyte Vallisneria denseserrulata Makino in a 10-month long mesocosm experiment. We used three macrophyte communities (one, three and six species) and four simulated scenarios of water level and nutrient loading (constant 75 cm, no nutrient loading; gradual water level increase from 75 cm to 150 cm over three months; extreme water level increase to 150 cm within one day at the same nutrient loading as in the gradual increase; constant 75 cm and the same nutrient loading as in the two former treatments). Leaf chlorophyll fluorescence, biomass, morphology of macrophytes and periphyton biomass were recorded. In the treatment with an extreme increase in water level, macrophyte biomass declined, whereas plant height and leaf number remained unchanged compared with the treatments where only nutrient but not water levels were increased. The combined effect of increased water level and enhanced nutrient loading (gradual and extreme change) did not differ significantly from the constant 75cm treatment without additional nutrient loading. No significant differences were found in epiphyton biomass among the water level treatments, while epipelon biomass was marginally higher and plant volume inhabited lower in the two treatments with a water level increase. Changes in macrophyte assemblages only had limited effects on maximum leaf width and the relative electron transport rate of V. denseserrulata. In conclusion, V. denseserrulata was overall resilient to the major simulated changes in precipitation, except when the water level increased suddenly, and only marginally influenced (leaf chlorophyll fluorescence parameter) by the composition of the macrophyte assemblage.

Original language	English
Journal	Environmental and Experimental Botany
Volume	153
Pages (from-to)	229-235
Number of pages	7
ISSN	0098-8472
DOIs	https://doi.org/10.1016/j.envexpbot.2018.06.003
Publication status	Published - 2018

Keywords

Extreme rainfall
Plant communities
Shallow lakes
Submerged macrophytes
Vallisneria denseserrulata
Water level

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10.1016/j.envexpbot.2018.06.003

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title = "Indirect effects of extreme precipitation on the growth of Vallisneria denseserrulata Makino",

abstract = "Submerged macrophytes are important for maintaining a clear water state in shallow lakes but are now threatened by the ongoing climate changes involving more extreme weather events. We explored the effects of extreme precipitation (higher water level, higher loading of nutrients (phosphorus and nitrogen)) on the growth of the submerged macrophyte Vallisneria denseserrulata Makino in a 10-month long mesocosm experiment. We used three macrophyte communities (one, three and six species) and four simulated scenarios of water level and nutrient loading (constant 75 cm, no nutrient loading; gradual water level increase from 75 cm to 150 cm over three months; extreme water level increase to 150 cm within one day at the same nutrient loading as in the gradual increase; constant 75 cm and the same nutrient loading as in the two former treatments). Leaf chlorophyll fluorescence, biomass, morphology of macrophytes and periphyton biomass were recorded. In the treatment with an extreme increase in water level, macrophyte biomass declined, whereas plant height and leaf number remained unchanged compared with the treatments where only nutrient but not water levels were increased. The combined effect of increased water level and enhanced nutrient loading (gradual and extreme change) did not differ significantly from the constant 75cm treatment without additional nutrient loading. No significant differences were found in epiphyton biomass among the water level treatments, while epipelon biomass was marginally higher and plant volume inhabited lower in the two treatments with a water level increase. Changes in macrophyte assemblages only had limited effects on maximum leaf width and the relative electron transport rate of V. denseserrulata. In conclusion, V. denseserrulata was overall resilient to the major simulated changes in precipitation, except when the water level increased suddenly, and only marginally influenced (leaf chlorophyll fluorescence parameter) by the composition of the macrophyte assemblage.",

keywords = "Extreme rainfall, Plant communities, Shallow lakes, Submerged macrophytes, Vallisneria denseserrulata, Water level",

author = "Yongwei Zhi and Yu Cao and Junyao Sun and Wei Li and Erik Jeppesen",

year = "2018",

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T1 - Indirect effects of extreme precipitation on the growth of Vallisneria denseserrulata Makino

AU - Zhi, Yongwei

AU - Cao, Yu

AU - Sun, Junyao

AU - Li, Wei

AU - Jeppesen, Erik

PY - 2018

Y1 - 2018

N2 - Submerged macrophytes are important for maintaining a clear water state in shallow lakes but are now threatened by the ongoing climate changes involving more extreme weather events. We explored the effects of extreme precipitation (higher water level, higher loading of nutrients (phosphorus and nitrogen)) on the growth of the submerged macrophyte Vallisneria denseserrulata Makino in a 10-month long mesocosm experiment. We used three macrophyte communities (one, three and six species) and four simulated scenarios of water level and nutrient loading (constant 75 cm, no nutrient loading; gradual water level increase from 75 cm to 150 cm over three months; extreme water level increase to 150 cm within one day at the same nutrient loading as in the gradual increase; constant 75 cm and the same nutrient loading as in the two former treatments). Leaf chlorophyll fluorescence, biomass, morphology of macrophytes and periphyton biomass were recorded. In the treatment with an extreme increase in water level, macrophyte biomass declined, whereas plant height and leaf number remained unchanged compared with the treatments where only nutrient but not water levels were increased. The combined effect of increased water level and enhanced nutrient loading (gradual and extreme change) did not differ significantly from the constant 75cm treatment without additional nutrient loading. No significant differences were found in epiphyton biomass among the water level treatments, while epipelon biomass was marginally higher and plant volume inhabited lower in the two treatments with a water level increase. Changes in macrophyte assemblages only had limited effects on maximum leaf width and the relative electron transport rate of V. denseserrulata. In conclusion, V. denseserrulata was overall resilient to the major simulated changes in precipitation, except when the water level increased suddenly, and only marginally influenced (leaf chlorophyll fluorescence parameter) by the composition of the macrophyte assemblage.

AB - Submerged macrophytes are important for maintaining a clear water state in shallow lakes but are now threatened by the ongoing climate changes involving more extreme weather events. We explored the effects of extreme precipitation (higher water level, higher loading of nutrients (phosphorus and nitrogen)) on the growth of the submerged macrophyte Vallisneria denseserrulata Makino in a 10-month long mesocosm experiment. We used three macrophyte communities (one, three and six species) and four simulated scenarios of water level and nutrient loading (constant 75 cm, no nutrient loading; gradual water level increase from 75 cm to 150 cm over three months; extreme water level increase to 150 cm within one day at the same nutrient loading as in the gradual increase; constant 75 cm and the same nutrient loading as in the two former treatments). Leaf chlorophyll fluorescence, biomass, morphology of macrophytes and periphyton biomass were recorded. In the treatment with an extreme increase in water level, macrophyte biomass declined, whereas plant height and leaf number remained unchanged compared with the treatments where only nutrient but not water levels were increased. The combined effect of increased water level and enhanced nutrient loading (gradual and extreme change) did not differ significantly from the constant 75cm treatment without additional nutrient loading. No significant differences were found in epiphyton biomass among the water level treatments, while epipelon biomass was marginally higher and plant volume inhabited lower in the two treatments with a water level increase. Changes in macrophyte assemblages only had limited effects on maximum leaf width and the relative electron transport rate of V. denseserrulata. In conclusion, V. denseserrulata was overall resilient to the major simulated changes in precipitation, except when the water level increased suddenly, and only marginally influenced (leaf chlorophyll fluorescence parameter) by the composition of the macrophyte assemblage.

KW - Extreme rainfall

KW - Plant communities

KW - Shallow lakes

KW - Submerged macrophytes

KW - Vallisneria denseserrulata

KW - Water level

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U2 - 10.1016/j.envexpbot.2018.06.003

DO - 10.1016/j.envexpbot.2018.06.003

M3 - Journal article

SN - 0098-8472

VL - 153

SP - 229

EP - 235

JO - Environmental and Experimental Botany

JF - Environmental and Experimental Botany

ER -

Indirect effects of extreme precipitation on the growth of Vallisneria denseserrulata Makino

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Keywords

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