Conceptual models of dissolved carbon fluxes in a two-layer stratified lake: interannual typhoon responses under extreme climates DOI Creative Commons
Hao‐Chi Lin, Keisuke Nakayama, Jeng‐Wei Tsai

et al.

Biogeosciences, Journal Year: 2023, Volume and Issue: 20(20), P. 4359 - 4376

Published: Oct. 25, 2023

Abstract. Extreme climates affect the seasonal and interannual patterns of carbon (C) distribution in lentic ecosystems due to regimes river inflow thermal stratification. Typhoons rapidly load substantial amounts terrestrial C into smaller subtropical lakes (i.e., Yuan-Yang Lake Taiwan, hereafter referred as YYL), renewing mixing water column. We developed a conceptual dissolved model hypothesized that allochthonous loading intrusion may inorganic (DIC) organic (DOC) distributions small lake under these extreme climates. A two-layer was explore how DIC DOC fluxes respond typhoon disturbances on timescales YYL while simultaneously considering autochthonous processes such algal photosynthesis, remineralization, vertical transformation. To compare temporal between years (2015–2016) non-typhoon (2017–2018), monthly field samples were obtained their DIC, DOC, chlorophyll (Chl a) concentrations measured. The results demonstrated net ecosystem production 3.14 times higher than years. These suggested most crucial driver variation because changes physical biochemical processes, mineralization, transportation. However, lowered transportation rate shaped stratification within this lake.

Language: Английский

FRESHWATER CARBON POTENTIAL OF AGRICULTURAL RESERVOIRS DOI

Mizuki SURIISHI,

Katsuji Uno,

Keisuke Nakayama

et al.

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

Published: Jan. 1, 2025

Language: Английский

Citations

0
EVALUATION OF THE SUBMERGED AQUATIC VEGETATION EFFECT ON SURFACE MIXED LAYER DOI
Kazunori Matsumoto, Kozo Okada, Yuan Peng

et al.

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

Published: Jan. 1, 2025

Language: Английский

Citations

0
ATTRIBUTION ANALYSIS OF DIC IN THE KARASUHARA RESERVOIR DOI
Yuxin Peng,

J. SAKAGUCHI,

Mizuki SURIISHI

et al.

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

Published: Jan. 1, 2025

Language: Английский

Citations

0
A phenomenology-based algorithm for extracting submerged aquatic vegetation in lakes using Sentinel-2 time seriesImagery: a case study of Potamogeton crispus DOI Creative Commons
Yiyao Liu, Taixia Wu, Shudong Wang

et al.

GIScience & Remote Sensing, Journal Year: 2025, Volume and Issue: 62(1)

Published: March 21, 2025

Language: Английский

Citations

0
Invasive primary producers modulate carbon fluxes and associated carbon budgets in temperate shallow lakes DOI Creative Commons

Jérémy Mayen,

Christophe Laplace-Treyture, Vincent Bertrin

et al.

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 975, P. 179282 - 179282

Published: April 5, 2025

Lowland shallow lakes are the receiving environments of nutrients and organic carbon from catchment area. In temperate areas, synergic action mild temperatures induce emissions these systems. However, this trend might be modulated by trophic state their productivity. study, we consider blooms invasive submerged aquatic vegetation (SAV) cyanobacteria as a valuable proxy for eutrophication explore role in pools associated budgets lakes. We calculated mass budget two large lakes, characterized different states colonized varying degrees SAV cyanobacteria, basing on annual (input, output, gas exchange, burial) metabolism. The oligo-mesotrophic lake behaved an CO2 CH4 source toward atmosphere (81.2 ± 14.8 g C m-2 yr-1), mainly due to dominant benthic heterotrophic metabolism, whereas mesotrophic sink (-6.7 9.7 because much higher net uptake cyanobacteria. lake, fast-growing metabolism primary producers also resulted strong buffer capacity with respect export lake. Our study highlights major played littoral lacustrine zones control regional/global cycle, especially densely vegetated suggest that interplay between biological invasions can switch sink.

Language: Английский

Citations

0
Small Ponds as Carbon Emission and Burial Hotspots in Lowland Agricultural Landscape DOI Creative Commons

Yulai Ji,

Jiacong Huang, Congsheng Fu

et al.

Earth s Future, Journal Year: 2025, Volume and Issue: 13(4)

Published: April 1, 2025

Abstract Clarifying carbon (C) cycling in small ponds is vital for understanding C transport lowland agricultural landscape. Quantifying flux crucial learning cycling, but challenging due to its complex and significant impacts from intensive human activities. Here, we developed a process‐based model (CDP) achieve daily estimation of dynamics within artificial watersheds (polders), proposed dual evaluation approach (concentration flux) assess the model's performance using two data sets obtained eight typical polders Lake Taihu Basin. The captured pond dynamics, achieving Nash‐Sutcliffe efficiency 0.44 ± 0.27. Our estimations based on newly‐developed showed large emissions, primarily through dioxide (CO 2 ) (497.5 g m −2 yr −1 ), along with burial (27.8 hot moment summer. Scenario simulations revealed distinct emissions associated growth death phytoplankton macrophytes. A 10% increase macrophyte rates 1.8 CO emission, while similar related 12.2–16.2% burial. This study quick response phytoplankton‐macrophyte dominance, highlighted high potential high‐resolution (daily) quantification fluxes, thereby enhancing our ponds.

Language: Английский

Citations

0
Numerical analysis of the impacts of the vegetation drag force on net primary production and carbon flow in shallow-waters using a hydrodynamic and ecological intercoupling model DOI Creative Commons

Hirotada Moki,

Koichi TAGUCHI,

Kenta Watanabe

et al.

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 980, P. 179506 - 179506

Published: May 2, 2025

Language: Английский

Citations

0
A novel strategy for estimating biomass of submerged aquatic vegetation in lake integrating UAV and Sentinel data DOI

Lu Lirong,

Juhua Luo,

Yihao Xin

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 912, P. 169404 - 169404

Published: Dec. 16, 2023

Language: Английский

Citations

10
Carbon dioxide uptake in a eutrophic stratified reservoir: Freshwater carbon sequestration potential DOI Creative Commons

J. SAKAGUCHI,

Keisuke Nakayama, Katsuaki KOMAI

et al.

Heliyon, Journal Year: 2023, Volume and Issue: 9(10), P. e20322 - e20322

Published: Sept. 20, 2023

Carbon capture and storage due to photosynthesis activities has been proposed as a carbon sink mitigate climate change. To enhance such mitigation, previous studies have shown that freshwater lakes should be included in the sink, since they may much coastal areas. In eutrophic lakes, there is uncertainty about whether equilibrium equation can estimate partial pressure of dioxide (pCO2), owing presence phytoplankton, pH measurement error fluid. Thus, this study investigated applicability revealed need modify it. The modified was successfully applied reproduce pCO2 based on total alkalinity through field observations. addition, at water surface lower than atmospheric by phytoplankton during strong stratification. stratification effect low verified using Net Ecosystem Production (NEP) model, submerged plants Potamogeton malaianus were found high potential for dissolved inorganic (DIC) sequestration lake. These results provide starting point toward more sophisticated methods investigate DIC uptake stratified lakes.

Language: Английский

Citations

4
Spatiotemporal heterogeneity of lake carbon dioxide flux leads to substantial uncertainties in regional upscaling estimates DOI
Tianci Qi, Ming Shen, Juhua Luo

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 948, P. 174920 - 174920

Published: July 20, 2024

Language: Английский

Citations

1