Effects of Lotus (Nelumbo nucifera Gaertn.) on the Methane Emission in Littoral Zones of a Subtropical Lake, China DOI Creative Commons
Wenchang Zhou, Xiangjuan Yuan,

Liangkang He

et al.

Applied Sciences, Journal Year: 2023, Volume and Issue: 13(20), P. 11330 - 11330

Published: Oct. 16, 2023

Freshwater lakes represent a potential source of methane (CH4) emission into the atmosphere. However, CH4 contribution to total in littoral zones lakes, especially emergent macrophytes (e.g., lotus), is poorly known. Lotus has been cultivated almost all provinces China; it not only an aquatic plant, but also kind vegetable. In this study, two sampling (lotus plant and open water) were established lake middle reaches Yangtze River. The was measured using floating opaque chamber gas chromatography between April December years 2021 2022. results indicated that flux emissions ranged from 0.10 59.75 mg m−2 h−1, with average value 5.61 water, while ranging 0.19 57.32 17.14 lotus zone. maximal occurred July August for which highly related air water temperature, whereas happened September zone, possibly due high vegetation biomass, indirectly enhancing soil organic carbon content, plant-mediated emission, as well lower dissolved oxygen concentration, thus strengthening production CH4. Considering (both CO2) productivity, although greater could still sink (213 g yr−1) compared water.

Language: Английский

Macrophyte Restoration Promotes Lake Microbial Carbon Pump to Enhance Aquatic Carbon Sequestration DOI

He Chen,

Peng Xing, Shuh‐Ji Kao

et al.

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(2)

Published: Feb. 1, 2025

ABSTRACT Macrophyte‐based lake restoration has successfully transitioned lakes from turbid conditions dominated by phytoplankton to a more natural, clear state; however, its impact on microbial carbon pump‐mediated dissolved organic (DOM) storage and greenhouse gas (GHG) emissions in the aquatic ecosystem remains largely unexplored. Through year‐long field study, we conducted comparative analysis of two alternative habitats within same lake—restored unrestored areas. Results demonstrated that not only substantially decreases nutrient levels algal blooms—evidenced over 50% reductions nitrogen, phosphorus, chlorophyll a—but also significantly increases accumulation recalcitrant DOM. This is characterized rises 9.52% highly unsaturated compounds, 8.68% carboxyl‐rich alicyclic molecules, 37.54% polycyclic condensed aromatics polyphenols, 20.21% SUVA 254 . Additionallly, key taxa with potent pump functions—primarily Gammaproteobacteria, Alphaproteobacteria, Actinobacteria—are enriched restored Structural equation modeling (SEM) further elucidated complex interrelationships pristine ecosystems: macrophytes elevated oxygen (DO) concentrations enhance sequestration via pathways, while mitigates methane caused eutrophication. These findings highlight an extra function macrophyte restoration, offering valuable insights into processes for future efforts aimed at promoting sustainable ecosystems mitigating global warming.

Language: Английский

Citations

1
Heat Waves Can Cause Hypoxia in Shallow Lakes DOI Creative Commons
Ryuichiro Shinohara, Shin‐ichiro S. Matsuzaki, Mirai Watanabe

et al.

Geophysical Research Letters, Journal Year: 2023, Volume and Issue: 50(8)

Published: April 16, 2023

Abstract We assessed how warm air temperatures, high solar radiation, and weak wind speeds might induce hypoxia in a shallow lake during heat wave. simulated bottom‐water dissolved oxygen concentrations compared 2022 with the average for previous 30 years. found that was most sensitive to speeds. When speed low, convection insufficient prevent hypoxia, but there no if equaled However, radiation temperatures respective averages years, did not occur, even were low. conclude combined effects of winds either or induced wave 2022.

Language: Английский

Citations

11
Evaluating the effectiveness of sediment retention by comparing the spatiotemporal burial of sediment carbon, nitrogen and phosphorus in a plateau lake and its affiliated reservoirs DOI
Xiaolei Wang, Jinliang Liu, Jessica Kitch

et al.

CATENA, Journal Year: 2023, Volume and Issue: 223, P. 106896 - 106896

Published: Jan. 4, 2023

Language: Английский

Citations

10
INTERNAL WAVE MODE IN LAKE BIWA DOI

Hibiki YONEDA,

Keisuke Nakayama,

Tatuya HIRAMI

et al.

Japanese Journal of JSCE, Journal Year: 2025, Volume and Issue: 81(16), P. n/a - n/a

Published: Jan. 1, 2025

Citations

0
Recent events and climate change impacts related to the environment, ecosystem, and fishery resources in northern Japanese coastal lagoons DOI
Hiroya Abe, Masahiro Nakaoka

Estuarine Coastal and Shelf Science, Journal Year: 2025, Volume and Issue: unknown, P. 109251 - 109251

Published: March 1, 2025

Language: Английский

Citations

0
Effects of growth and decline of cyanobacteria on CH<sub>4</sub> and CO<sub>2</sub> emission fluxes and their source pathways in sediment-water system of Lake Taihu, China DOI Open Access

Wu Mingjie,

Hai Xu, Xu Zhan

et al.

Journal of Lake Sciences, Journal Year: 2025, Volume and Issue: 37(2), P. 401 - 414

Published: Jan. 1, 2025

Language: Английский

Citations

0
Global inland-water oxygen cycle has changed in the Anthropocene DOI Creative Commons
Junjie Wang, Xiaochen Liu, A. F. Bouwman

et al.

Science Advances, Journal Year: 2025, Volume and Issue: 11(14)

Published: April 4, 2025

Inland waters are an important resource, a highly diverse habitat, and key component of global biogeochemical cycles. Oxygen plays major role in inland-water ecosystem functioning, but long-term changes its cycling remain unknown. Here, we quantify oxygen production, consumption, exchange with the atmosphere during 1900–2010 using spatially explicit, mass-balanced, mechanistic model that takes into account climate, hydrology, human activities, coupled (oxygen-nutrient-organic matter) dynamics. The results show turnover increased 1900–2010: production from 0.16 to 0.94 Pg year −1 consumption 0.44 1.47 . overall remained heterotrophic sink atmospheric oxygen. Direct perturbations (changes hydrology nutrient supply) were more increasing than indirect effects via warming.

Language: Английский

Citations

0
Methane and carbon dioxide emission from an urban lake in India DOI

R. S. Khoiyangbam

Lake and Reservoir Management, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 11

Published: April 30, 2025

Language: Английский

Citations

0
A Detailed Analysis on Hydrodynamic Response of a Highly Stratified Lake to Spatio-Temporally Varying Wind Field DOI Open Access

Hieu Ngoc Le,

Tetsuya SHINTANI, Keisuke Nakayama

et al.

Water, Journal Year: 2023, Volume and Issue: 15(3), P. 565 - 565

Published: Feb. 1, 2023

Wind is generally considered an important factor driving the transport and mixing processes in stratified enclosed systems such as lakes reservoirs. Lake Abashiri one of instances a system. For these systems, typically, temporally unsteady but spatially uniform nature wind has been assumed for simplicity. However, spatial non-uniformity could significantly alter compound hydrodynamic responses. In this study, responses were investigated under continuous imposition different inhomogeneous conditions by applying numerical models integrated analysis. The resultant tracer both non-uniform cases was insignificant total study period 9 days. short interval Ti, where Ti internal fundamental period, behaviors surface particle wave field identified. Particularly, mass to higher variance obviously from those case. addition, spectra strong magnitude, which low variances, became identical that wind; however, there some discrepancies case influence weak-to-moderate high variances. results provide in-depth understanding lake’s response improve water management

Language: Английский

Citations

7
Invasive Water Hyacinth (Eichhornia crassipes) Increases Methane Emissions from a Subtropical Lake in the Yangtze River in China DOI Creative Commons
Wenchang Zhou,

Shanshan Xiang,

Yuhu Shi

et al.

Diversity, Journal Year: 2022, Volume and Issue: 14(12), P. 1036 - 1036

Published: Nov. 26, 2022

Lakes represent an important source of atmospheric methane (CH4); however, there are few studies on which lake-dwelling invasive aquatic plants generate CH4. Therefore, in this study, CH4 emissions were measured using a floating chamber and gas chromatography subtropical lake China. We considered four community zones (Eichhornia crassipes), emergent vegetation (Zizania latifolia), floating-plant (Trapa natans) open-water zones. The results indicate that the flux varied between −5.38 102.68 mg m−2 h−1. higher emission values attributed to eutrophication. Moreover, plant zone was 140–220% than However, no significant difference This may be due production plants, as well rapid reproductive rate plants. Finally, positively associated with air water temperature; also negatively depth. Our suggest enhance freshwater emissions, thus contributing global warming.

Language: Английский

Citations

10