Benthic primary production decreases internal phosphorus loading from lake sediments under light supplement

Miao Zhang; Yan Li; Kazi Belal Uddin; Jia Hao Liu; Rui Ting Qiao; Yong Jing Zhao; Shuo Nan Ma; Martin Søndergaard; Hong Zhu Wang

doi:10.1016/j.ecoenv.2023.115834

Benthic primary production decreases internal phosphorus loading from lake sediments under light supplement

Miao Zhang, Yan Li, Kazi Belal Uddin, Jia Hao Liu, Rui Ting Qiao, Yong Jing Zhao, Shuo Nan Ma, Martin Søndergaard, Hong Zhu Wang^*

^*Corresponding author for this work

Department of Ecoscience - Freshwater Ecology

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

Abstract

In aquatic ecosystems, light penetrating the sediment surface in shallow lakes may regulate the internal phosphorus (P) release through benthic primary production, which subsequently affects oxidation, pH levels, and alkaline phosphatase activity in the upper sediment. To study the effects of light exposure on the P dynamics at the sediment-water interface under eutrophic conditions, a two-month mesocosm experiment was conducted in twelve cement tanks (1000 L each). The tanks were equipped with Light-Emitting Diode (LED) lights, and surface sediments collected from eutrophic Lake Nanhu (China) were exposed to four different light intensities (0, 50, 100, 200 μmol m⁻² s⁻¹). The results revealed that: 1) Both the total phosphorus concentration and the phosphorus release flux from the sediment were lower in the light treatments (mean value, 0.59–0.71 mg L⁻¹ and 0.00–0.01 mg m⁻² d⁻¹, respectively) than in the control treatment (0.77 mg L⁻¹ and 0.01 mg m⁻² d⁻¹, respectively), indicating that light supplement could decrease the internal P release. 2) Benthic primary production promoted by light directly absorbed soluble reactive phosphorus and decreased the internal P release. The resulting improved production could also increase dissolved oxygen concentrations at the sediment-water interface, thus indirectly inhibiting internal P release. 3) The relative contributions of direct absorption and indirect inhibition on the internal P release ranged between 23% to 69% and 31% to 77% depending on the light intensity.

Original language	English
Article number	115834
Journal	Ecotoxicology and Environmental Safety
Volume	270
Number of pages	9
ISSN	0147-6513
DOIs	https://doi.org/10.1016/j.ecoenv.2023.115834
Publication status	Published - Jan 2024

Keywords

Alkaline phosphatase activity
Benthic primary production
Dissolved oxygen
Eutrophication
Sediment phosphorus release

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10.1016/j.ecoenv.2023.115834Licence: CC BY-NC-ND

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@article{37f455886c25406994c7aed4af5e7373,

title = "Benthic primary production decreases internal phosphorus loading from lake sediments under light supplement",

abstract = "In aquatic ecosystems, light penetrating the sediment surface in shallow lakes may regulate the internal phosphorus (P) release through benthic primary production, which subsequently affects oxidation, pH levels, and alkaline phosphatase activity in the upper sediment. To study the effects of light exposure on the P dynamics at the sediment-water interface under eutrophic conditions, a two-month mesocosm experiment was conducted in twelve cement tanks (1000 L each). The tanks were equipped with Light-Emitting Diode (LED) lights, and surface sediments collected from eutrophic Lake Nanhu (China) were exposed to four different light intensities (0, 50, 100, 200 μmol m−2 s−1). The results revealed that: 1) Both the total phosphorus concentration and the phosphorus release flux from the sediment were lower in the light treatments (mean value, 0.59–0.71 mg L−1 and 0.00–0.01 mg m−2 d−1, respectively) than in the control treatment (0.77 mg L−1 and 0.01 mg m−2 d−1, respectively), indicating that light supplement could decrease the internal P release. 2) Benthic primary production promoted by light directly absorbed soluble reactive phosphorus and decreased the internal P release. The resulting improved production could also increase dissolved oxygen concentrations at the sediment-water interface, thus indirectly inhibiting internal P release. 3) The relative contributions of direct absorption and indirect inhibition on the internal P release ranged between 23% to 69% and 31% to 77% depending on the light intensity.",

keywords = "Alkaline phosphatase activity, Benthic primary production, Dissolved oxygen, Eutrophication, Sediment phosphorus release",

author = "Miao Zhang and Yan Li and Uddin, {Kazi Belal} and Liu, {Jia Hao} and Qiao, {Rui Ting} and Zhao, {Yong Jing} and Ma, {Shuo Nan} and Martin S{\o}ndergaard and Wang, {Hong Zhu}",

year = "2024",

month = jan,

doi = "10.1016/j.ecoenv.2023.115834",

language = "English",

volume = "270",

journal = "Ecotoxicology and Environmental Safety",

issn = "0147-6513",

publisher = "Academic Press",

}

Benthic primary production decreases internal phosphorus loading from lake sediments under light supplement. / Zhang, Miao; Li, Yan; Uddin, Kazi Belal et al.
In: Ecotoxicology and Environmental Safety, Vol. 270, 115834, 01.2024.

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

TY - JOUR

T1 - Benthic primary production decreases internal phosphorus loading from lake sediments under light supplement

AU - Zhang, Miao

AU - Li, Yan

AU - Uddin, Kazi Belal

AU - Liu, Jia Hao

AU - Qiao, Rui Ting

AU - Zhao, Yong Jing

AU - Ma, Shuo Nan

AU - Søndergaard, Martin

AU - Wang, Hong Zhu

PY - 2024/1

Y1 - 2024/1

N2 - In aquatic ecosystems, light penetrating the sediment surface in shallow lakes may regulate the internal phosphorus (P) release through benthic primary production, which subsequently affects oxidation, pH levels, and alkaline phosphatase activity in the upper sediment. To study the effects of light exposure on the P dynamics at the sediment-water interface under eutrophic conditions, a two-month mesocosm experiment was conducted in twelve cement tanks (1000 L each). The tanks were equipped with Light-Emitting Diode (LED) lights, and surface sediments collected from eutrophic Lake Nanhu (China) were exposed to four different light intensities (0, 50, 100, 200 μmol m−2 s−1). The results revealed that: 1) Both the total phosphorus concentration and the phosphorus release flux from the sediment were lower in the light treatments (mean value, 0.59–0.71 mg L−1 and 0.00–0.01 mg m−2 d−1, respectively) than in the control treatment (0.77 mg L−1 and 0.01 mg m−2 d−1, respectively), indicating that light supplement could decrease the internal P release. 2) Benthic primary production promoted by light directly absorbed soluble reactive phosphorus and decreased the internal P release. The resulting improved production could also increase dissolved oxygen concentrations at the sediment-water interface, thus indirectly inhibiting internal P release. 3) The relative contributions of direct absorption and indirect inhibition on the internal P release ranged between 23% to 69% and 31% to 77% depending on the light intensity.

AB - In aquatic ecosystems, light penetrating the sediment surface in shallow lakes may regulate the internal phosphorus (P) release through benthic primary production, which subsequently affects oxidation, pH levels, and alkaline phosphatase activity in the upper sediment. To study the effects of light exposure on the P dynamics at the sediment-water interface under eutrophic conditions, a two-month mesocosm experiment was conducted in twelve cement tanks (1000 L each). The tanks were equipped with Light-Emitting Diode (LED) lights, and surface sediments collected from eutrophic Lake Nanhu (China) were exposed to four different light intensities (0, 50, 100, 200 μmol m−2 s−1). The results revealed that: 1) Both the total phosphorus concentration and the phosphorus release flux from the sediment were lower in the light treatments (mean value, 0.59–0.71 mg L−1 and 0.00–0.01 mg m−2 d−1, respectively) than in the control treatment (0.77 mg L−1 and 0.01 mg m−2 d−1, respectively), indicating that light supplement could decrease the internal P release. 2) Benthic primary production promoted by light directly absorbed soluble reactive phosphorus and decreased the internal P release. The resulting improved production could also increase dissolved oxygen concentrations at the sediment-water interface, thus indirectly inhibiting internal P release. 3) The relative contributions of direct absorption and indirect inhibition on the internal P release ranged between 23% to 69% and 31% to 77% depending on the light intensity.

KW - Alkaline phosphatase activity

KW - Benthic primary production

KW - Dissolved oxygen

KW - Eutrophication

KW - Sediment phosphorus release

UR - http://www.scopus.com/inward/record.url?scp=85180350575&partnerID=8YFLogxK

U2 - 10.1016/j.ecoenv.2023.115834

DO - 10.1016/j.ecoenv.2023.115834

M3 - Journal article

C2 - 38101976

AN - SCOPUS:85180350575

SN - 0147-6513

VL - 270

JO - Ecotoxicology and Environmental Safety

JF - Ecotoxicology and Environmental Safety

M1 - 115834

ER -

Benthic primary production decreases internal phosphorus loading from lake sediments under light supplement

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Keywords

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