Inundation depth stimulates plant-mediated CH4 emissions by increasing ecosystem carbon uptake and plant height in an estuarine wetland

Mingliang Zhao; Peiguang Li; Weimin Song; Xiaojing Chu; Franziska Eller; Xiaojie Wang; Jingtao Liu; Leilei Xiao; Siyu Wei; Xinge Li; Guangxuan Han

doi:10.1111/1365-2435.14258

Inundation depth stimulates plant-mediated CH₄ emissions by increasing ecosystem carbon uptake and plant height in an estuarine wetland

Mingliang Zhao, Peiguang Li, Weimin Song, Xiaojing Chu, Franziska Eller, Xiaojie Wang, Jingtao Liu, Leilei Xiao, Siyu Wei, Xinge Li, Guangxuan Han^*

^*Corresponding author for this work

Department of Biology - Aquatic Biology

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

8 Citations (Scopus)

Abstract

Plant-mediated CH₄ emission is an important part of the ecosystem CH₄ emission from vegetated wetlands. Inundation depth may alter the potential magnitude of CH₄ releases by changing CH₄ production and plant transport, but the relationships between plant-mediated CH₄ emissions and inundation depth are still uncertain, especially for estuarine wetlands with changeable hydrological processes. Besides, there are conflicting results regarding the role of inundation depth in plant-mediated CH₄ emissions. Here we conducted a novel inundation depth experiment (0, 5, 10, 20, 30 and 40 cm inundation depth) dominated by Phragmites australis in the Yellow River estuary, China. Soil CH₄ emissions, ecosystem CH₄ emissions, net ecosystem CO₂ exchange (NEE), soil organic carbon (SOC) and plant traits were measured during the growing seasons of 2018, 2019 and 2020. Plant-mediated CH₄ emissions were the difference between ecosystem CH₄ emissions and soil CH₄ emissions. The results showed that inundation depth decreased soil CH₄ emissions but increased ecosystem CH₄ emissions. Plant-mediated CH₄ transport from Phragmites australis accounted for 99% of total ecosystem CH₄ emissions under different inundation depths. Inundation depth strongly stimulated plant-mediated CH₄ emission from 0 to 20 cm during the growing seasons. The increased NEE enhanced plant-mediated CH₄ emissions by altering production, suggesting that carbon components derived from photosynthetic carbon input may benefit CH₄ production. Additionally, the increased plant height promoted CH₄ emission by regulating plant transport, indicating that plant traits may play an important role in transport of CH₄. Our findings indicated that NEE and plant height play an important role in plant-mediated CH₄ emissions under different inundation depths in estuarine wetland. This study also highlights that hydrological regimes and plant traits are essential for the estimation of CH₄ emissions in future projections of global wetland changes. Read the free Plain Language Summary for this article on the Journal blog.

Original language	English
Journal	Functional Ecology
Volume	37
Issue	3
Pages (from-to)	536-550
Number of pages	15
ISSN	0269-8463
DOIs	https://doi.org/10.1111/1365-2435.14258
Publication status	Published - Mar 2023

Keywords

estuarine wetland
inundation depth
net ecosystem CO exchange
plant height
plant-mediated CH emissions

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10.1111/1365-2435.14258

Cite this

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title = "Inundation depth stimulates plant-mediated CH4 emissions by increasing ecosystem carbon uptake and plant height in an estuarine wetland",

abstract = "Plant-mediated CH4 emission is an important part of the ecosystem CH4 emission from vegetated wetlands. Inundation depth may alter the potential magnitude of CH4 releases by changing CH4 production and plant transport, but the relationships between plant-mediated CH4 emissions and inundation depth are still uncertain, especially for estuarine wetlands with changeable hydrological processes. Besides, there are conflicting results regarding the role of inundation depth in plant-mediated CH4 emissions. Here we conducted a novel inundation depth experiment (0, 5, 10, 20, 30 and 40 cm inundation depth) dominated by Phragmites australis in the Yellow River estuary, China. Soil CH4 emissions, ecosystem CH4 emissions, net ecosystem CO2 exchange (NEE), soil organic carbon (SOC) and plant traits were measured during the growing seasons of 2018, 2019 and 2020. Plant-mediated CH4 emissions were the difference between ecosystem CH4 emissions and soil CH4 emissions. The results showed that inundation depth decreased soil CH4 emissions but increased ecosystem CH4 emissions. Plant-mediated CH4 transport from Phragmites australis accounted for 99% of total ecosystem CH4 emissions under different inundation depths. Inundation depth strongly stimulated plant-mediated CH4 emission from 0 to 20 cm during the growing seasons. The increased NEE enhanced plant-mediated CH4 emissions by altering production, suggesting that carbon components derived from photosynthetic carbon input may benefit CH4 production. Additionally, the increased plant height promoted CH4 emission by regulating plant transport, indicating that plant traits may play an important role in transport of CH4. Our findings indicated that NEE and plant height play an important role in plant-mediated CH4 emissions under different inundation depths in estuarine wetland. This study also highlights that hydrological regimes and plant traits are essential for the estimation of CH4 emissions in future projections of global wetland changes. Read the free Plain Language Summary for this article on the Journal blog.",

keywords = "estuarine wetland, inundation depth, net ecosystem CO exchange, plant height, plant-mediated CH emissions",

author = "Mingliang Zhao and Peiguang Li and Weimin Song and Xiaojing Chu and Franziska Eller and Xiaojie Wang and Jingtao Liu and Leilei Xiao and Siyu Wei and Xinge Li and Guangxuan Han",

note = "Publisher Copyright: {\textcopyright} 2023 British Ecological Society.",

year = "2023",

month = mar,

doi = "10.1111/1365-2435.14258",

language = "English",

volume = "37",

pages = "536--550",

journal = "Functional Ecology",

issn = "0269-8463",

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Inundation depth stimulates plant-mediated CH₄ emissions by increasing ecosystem carbon uptake and plant height in an estuarine wetland. / Zhao, Mingliang; Li, Peiguang; Song, Weimin et al.
In: Functional Ecology, Vol. 37, No. 3, 03.2023, p. 536-550.

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

TY - JOUR

T1 - Inundation depth stimulates plant-mediated CH4 emissions by increasing ecosystem carbon uptake and plant height in an estuarine wetland

AU - Zhao, Mingliang

AU - Li, Peiguang

AU - Song, Weimin

AU - Chu, Xiaojing

AU - Eller, Franziska

AU - Wang, Xiaojie

AU - Liu, Jingtao

AU - Xiao, Leilei

AU - Wei, Siyu

AU - Li, Xinge

AU - Han, Guangxuan

PY - 2023/3

Y1 - 2023/3

N2 - Plant-mediated CH4 emission is an important part of the ecosystem CH4 emission from vegetated wetlands. Inundation depth may alter the potential magnitude of CH4 releases by changing CH4 production and plant transport, but the relationships between plant-mediated CH4 emissions and inundation depth are still uncertain, especially for estuarine wetlands with changeable hydrological processes. Besides, there are conflicting results regarding the role of inundation depth in plant-mediated CH4 emissions. Here we conducted a novel inundation depth experiment (0, 5, 10, 20, 30 and 40 cm inundation depth) dominated by Phragmites australis in the Yellow River estuary, China. Soil CH4 emissions, ecosystem CH4 emissions, net ecosystem CO2 exchange (NEE), soil organic carbon (SOC) and plant traits were measured during the growing seasons of 2018, 2019 and 2020. Plant-mediated CH4 emissions were the difference between ecosystem CH4 emissions and soil CH4 emissions. The results showed that inundation depth decreased soil CH4 emissions but increased ecosystem CH4 emissions. Plant-mediated CH4 transport from Phragmites australis accounted for 99% of total ecosystem CH4 emissions under different inundation depths. Inundation depth strongly stimulated plant-mediated CH4 emission from 0 to 20 cm during the growing seasons. The increased NEE enhanced plant-mediated CH4 emissions by altering production, suggesting that carbon components derived from photosynthetic carbon input may benefit CH4 production. Additionally, the increased plant height promoted CH4 emission by regulating plant transport, indicating that plant traits may play an important role in transport of CH4. Our findings indicated that NEE and plant height play an important role in plant-mediated CH4 emissions under different inundation depths in estuarine wetland. This study also highlights that hydrological regimes and plant traits are essential for the estimation of CH4 emissions in future projections of global wetland changes. Read the free Plain Language Summary for this article on the Journal blog.

AB - Plant-mediated CH4 emission is an important part of the ecosystem CH4 emission from vegetated wetlands. Inundation depth may alter the potential magnitude of CH4 releases by changing CH4 production and plant transport, but the relationships between plant-mediated CH4 emissions and inundation depth are still uncertain, especially for estuarine wetlands with changeable hydrological processes. Besides, there are conflicting results regarding the role of inundation depth in plant-mediated CH4 emissions. Here we conducted a novel inundation depth experiment (0, 5, 10, 20, 30 and 40 cm inundation depth) dominated by Phragmites australis in the Yellow River estuary, China. Soil CH4 emissions, ecosystem CH4 emissions, net ecosystem CO2 exchange (NEE), soil organic carbon (SOC) and plant traits were measured during the growing seasons of 2018, 2019 and 2020. Plant-mediated CH4 emissions were the difference between ecosystem CH4 emissions and soil CH4 emissions. The results showed that inundation depth decreased soil CH4 emissions but increased ecosystem CH4 emissions. Plant-mediated CH4 transport from Phragmites australis accounted for 99% of total ecosystem CH4 emissions under different inundation depths. Inundation depth strongly stimulated plant-mediated CH4 emission from 0 to 20 cm during the growing seasons. The increased NEE enhanced plant-mediated CH4 emissions by altering production, suggesting that carbon components derived from photosynthetic carbon input may benefit CH4 production. Additionally, the increased plant height promoted CH4 emission by regulating plant transport, indicating that plant traits may play an important role in transport of CH4. Our findings indicated that NEE and plant height play an important role in plant-mediated CH4 emissions under different inundation depths in estuarine wetland. This study also highlights that hydrological regimes and plant traits are essential for the estimation of CH4 emissions in future projections of global wetland changes. Read the free Plain Language Summary for this article on the Journal blog.

KW - estuarine wetland

KW - inundation depth

KW - net ecosystem CO exchange

KW - plant height

KW - plant-mediated CH emissions

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U2 - 10.1111/1365-2435.14258

DO - 10.1111/1365-2435.14258

M3 - Journal article

AN - SCOPUS:85147428019

SN - 0269-8463

VL - 37

SP - 536

EP - 550

JO - Functional Ecology

JF - Functional Ecology

IS - 3

ER -

Inundation depth stimulates plant-mediated CH₄ emissions by increasing ecosystem carbon uptake and plant height in an estuarine wetland

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