The Role of Wetlands in Mitigating Impacts From Diffuse Agricultural Loads

Hatvani, István Gábor; Dokulil, Martin T.; Clement, Adrienne

doi:10.1016/b978-0-12-819166-8.00093-1

Cited by 3 publications

(1 citation statement)

References 66 publications

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“…IAEs are sensitive to accelerated changes caused by anthropogenic activities (mainly agriculture and urban development; [14,15]). C processing in lakes is closely related to trophic status [10].…”

Section: Introductionmentioning

confidence: 99%

Carbon Dioxide Concentration and Emissions along a Trophic Gradient in Tropical Karst Lakes

Vargas-Sánchez

Alcocer

Sánchez-Carrillo

et al. 2022

Water

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Inland aquatic ecosystems are valuable sentinels of anthropic-associated changes (e.g., agriculture and tourism). Eutrophication has become of primary importance in altering aquatic ecosystem functioning. Quantifying the CO2 emissions by inland aquatic ecosystems of different trophic statuses may provide helpful information about the role of eutrophication on greenhouse gas emissions. This study investigated diel and seasonal carbon dioxide (CO2) concentrations and emissions in three tropical karst lakes with different trophic statuses. We measured CO2 emissions using static floating chambers twice daily during the rainy/warm and dry/cold seasons while the lakes were thermally stratified and mixed, respectively. The CO2 concentration was estimated by gas chromatography and photoacoustic spectroscopy. The results showed a significant seasonal variation in the dissolved CO2 concentration (CCO2) and the CO2 flux (FCO2), with the largest values in the rainy/warm season but not along the diel cycle. The CCO2 values ranged from 13.3 to 168.6 µmol L−1 averaging 41.9 ± 35.3 µmol L−1 over the rainy/warm season and from 12.9 to 38.0 µmol L−1 with an average of 21.0 ± 7.2 µmol L−1 over the dry/cold season. The FCO2 values ranged from 0.2 to 12.1 g CO2 m−2 d−1 averaging 4.9 ± 4.0 g CO2 m−2 d−1 over the rainy/warm season and from 0.1 to 1.7 g CO2 m−2 d−1 with an average of 0.8 ± 0.5 g CO2 m−2 d−1 over the dry/cold season. During the rainy/warm season the emission was higher in the eutrophic lake San Lorenzo (9.1 ± 1.2 g CO2 m−2 d−1), and during the dry/cold the highest emission was recorded in the mesotrophic lake San José (1.42 ± 0.2 g CO2 m−2 d−1). Our results indicated that eutrophication in tropical karst lakes increased CO2 evasion rates to the atmosphere mainly due to the persistence of anoxia in most of the lake’s water column, which maintained high rates of anaerobic respiration coupled with the anaerobic oxidation of methane. Contrarily, groundwater inflows that provide rich-dissolved inorganic carbon waters sustain emissions in meso and oligotrophic karstic tropical lakes.

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Section: Introductionmentioning

confidence: 99%

Carbon Dioxide Concentration and Emissions along a Trophic Gradient in Tropical Karst Lakes

Vargas-Sánchez

Alcocer

Sánchez-Carrillo

et al. 2022

Water

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Continental lowlands face rising crop vulnerability: structural change in regional climate sensitivity of crop yields, Hungary (Central and Eastern Europe), 1921–2010

Pinke,

Decsi,

Demeter

et al. 2024

Reg Environ Change

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Central and Eastern Europe (CEE) is a pillar of global wheat and maize production. However, certain areas within the CEE region have become climate change hotspots, experiencing intensifying water deficits and drought pressure, rising mean and maximum temperatures. This study focuses on the long-term statistical relationships between climatic factors and rain-fed wheat and maize yields for different landscape types in Hungary over 30-year time windows between 1921 and 2010. The relationship between the variances of the detrended climatic parameters and crop yields was tested employing both simple and multifactorial linear models according to landscape types and periods. The sensitivity of wheat yields to spring–summer mean temperature shifted dynamically from the western part of the country to east (from cooler and wetter hilly landscapes to plains) between the periods 1921–1950 and 1981–2010. The cooling observed in summer temperature between the periods 1921–1950 and 1951–1980 supported an increase in wheat yields by an estimated 0.11–0.43 t ha−1 year−1, while the 0.9–1.2 °C warming of May–July temperature may have cut wheat yields by an estimated 0.44–0.56 t ha−1 year−1 in various regions over 1981–2010. That being said, the regional sensitivity of wheat yields to May–July mean temperature did not display substantial differences between the periods 1921–1950 and 1981–2010. Besides negative effects, climate change had a positive impact on wheat yields, since increasing January–March mean temperatures mitigated the negative impact of warming summer temperatures on wheat yields by an estimated 16–34% over 1981–2010. In this 30-year period, increasing mean temperature together with decreasing precipitation explained 46–75% of the variances in maize yields reducing annual maize harvests by an estimated 11.1–12.4% year−1.

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Wetlands as nature-based solutions for water management in different environments

Ferreira

Kašanin‐Grubin

Solomun

et al. 2023

Current Opinion in Environmental Science & Health

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The Role of Wetlands in Mitigating Impacts From Diffuse Agricultural Loads

Cited by 3 publications

References 66 publications

Carbon Dioxide Concentration and Emissions along a Trophic Gradient in Tropical Karst Lakes

Carbon Dioxide Concentration and Emissions along a Trophic Gradient in Tropical Karst Lakes

Continental lowlands face rising crop vulnerability: structural change in regional climate sensitivity of crop yields, Hungary (Central and Eastern Europe), 1921–2010

Wetlands as nature-based solutions for water management in different environments

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