Evapotranspiration and biogeochemical regulation in a mountain peatland: insights from eddy covariance and ionic balance measurements

Gunawardhana, M. K. P. C.; Silvester, Ewen; Jones, Oliver A.H.; Grover, Samantha

doi:10.1016/j.ejrh.2021.100851

Cited by 9 publications

(4 citation statements)

References 68 publications

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“…The vegetation composition of the peatland is dominated by Sphagnum moss ( Sphagnum cristatum ), in association with candle heath ( Richea continentis ), alpine baeckea ( Baeckea gunniana ) and rope rush ( Empodisma minus ) (Wahren et al, 1999). The peat depth ranges between 0.3 m and greater than 1 m (Gunawardhana et al, 2021). Watchbed Creek peatland is fed by both rainfall and groundwater.…”

Section: Methodsmentioning

confidence: 99%

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Peatland carbon chemistry, amino acids and protein preservation in biogeochemically distinct ecohydrologic layers

Yusuf,

Silvester,

Brkljaca

et al. 2024

European J Soil Science

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Peatlands play a significant role in global carbon and nitrogen cycles due to their carbon storage capabilities. However, there are key knowledge gaps in our understanding of how peatland hydrology influences the biogeochemical properties that drive peatland functioning and health. This study examines peatland hydrology and biogeochemical dynamics by exploring the variations in carbon chemistry, total amino acid (‘protein’) content and amino acid composition in the ecohydrologic layers: acrotelm, mesotelm and catotelm. The dynamic movement of the water table recorded half‐hourly over 4 years was used to assist in identifying the boundaries between these layers. Peat amino acids were measured using liquid chromatography‐tandem mass spectrometry (LC‐MS/MS). Carbon chemistry was analysed by solid state Cross Polarization Magic Angle Spinning (CPMAS) 13C Nuclear Magnetic Resonance (NMR) spectroscopy, with the alkyl:O‐alkyl ratio used to quantify the extent of decomposition. Our result revealed a strong positive correlation between the extent of decomposition and total protein content, indicating selective preservation of proteinaceous materials during peat decomposition. Each ecohydrologic layer displayed a distinct amino acid composition and carbon functional group composition. The acrotelm was relatively enriched in seven amino acids and two carbon functional groups. The mesotelm was relatively enriched in four amino acids, while the catotelm was relatively enriched in three amino acids and four carbon functional groups. The variations in amino acid composition reflect differences in microbial function and efficiency, while variations in carbon functional groups provide insights into long‐term carbon sequestration in peatland. Collectively, these results provide more insights into nutrient cycling and changes in organic matter composition during peat decomposition. These findings demonstrate that peatland biogeochemistry is closely linked to ecohydrology and suggest that changes to water table dynamics could affect the ability of peatlands to sequester and store carbon in the future.

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Section: Methodsmentioning

confidence: 99%

“…Study sites showing the peat core sampling locations and five piezometers (P1–P5) at Watchbed Creek peatland, Australia, adapted from Gunawardhana et al (2021). …”

Section: Methodsmentioning

confidence: 99%

Peatland carbon chemistry, amino acids and protein preservation in biogeochemically distinct ecohydrologic layers

Yusuf,

Silvester,

Brkljaca

et al. 2024

European J Soil Science

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“…In Poland, one of the larger peatland concentrations is the macroregion of the Mazurian Lake District situated in north-eastern Poland. Peatlands, due to the functions they serve in the habitat, including water circulation and accumulation [9,10], effects on element circulation [11,12], water purification [13], protection of biodiversity [14], and effects on the climate [15], are covered by full protection [5,16].…”

Section: Introductionmentioning

confidence: 99%

“…Research into the biophysiochemical processes occurring in peatlands, in terms of their economic use and environmental impact, is becoming crucial [4,[17][18][19]. Not only are peatlands natural water retention reservoirs in the environment [9,10], but, due to the hydrobioaccumulation processes that occur in them, they also accumulate organic matter [20], which is rich in plant nutrients, particularly nitrogen [11,12]. The organic matter contained in peats exhibits filtration and sorption properties [21].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Organic Nitrogen Compound Mineralization in Organic Soils under Grassland, and the Mineral N Concentration in Groundwater (A Case Study of the Mazurian Lake District, Poland)

Pawluczuk

Stępień

2023

Sustainability

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Peatlands serve numerous functions, with one of the main ones being the retention of nutrients, including mineral nitrogen. A field study in organic soils was carried out in the Mazurian Lake District situated in north-eastern Poland (53°37′50′ N, 20°28′51′ E). In the test peat soils, the rate of organic nitrogen compound mineralization varied significantly depending on the season. The dynamics of the organic matter mineralization process were most strongly influenced by the soil use and the season. The mineral N release was higher in organic soil under intensively used grassland. In this soil, much more mineral nitrogen was released during the summer and spring periods. The dominant form in the organic nitrogen compound mineralization processes was N-NO3. The highest dynamics of the organic nitrogen compound mineralization were noted at a soil moisture content ranging from 57% to 59%. The interdependence of the soil moisture content and the rate of organic nitrogen compound mineralization fluctuated over the study period, with an increase in spring and a decrease in summer. A correlation was demonstrated between the nitrate form content in the peat soils under intensive cultivation and the nitrate-nitrogen concentration in groundwater, while no correlation was demonstrated between the N-NO3 content in the soils under a forest and the N-NO3 concentration in the groundwater of these soils. The results provide the basis for the conclusion that the land use type (forest, grassland), which determines the morphological structure of organic soils, affects the intensity of the infiltration of different mineral nitrogen forms.

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Application of Remote Sensing and GIS in Crop Yield Forecasting and Water Productivity

Bhoutika

Das

Kumar

et al. 2021

Geospatial Technologies for Land and Water Resources Management

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Sugarcane is one of India's most important cash crops and one of the major crops of Uttarakhand state. Accurate crop yield forecasting is essential for making appropriate government policies. Statistical regression method using meteorological parameters is one of the most widely used crop yield forecasting methods. With the help of statistical regression, it is possible to forecast the sugarcane yield a few months before the harvest. But there is no direct cause-effect relationship between meteorological parameters and crop yield, so uses of other independent parameters can increase the crop yield accuracy. Evapotranspiration is one of the most crucial independent parameters, which can be easily estimated using remote sensing. The benefit of remote sensing over other fields and empirical methods for evapotranspiration is the easy availability of data over a large area as data availability becomes critical in other methods. Crop water efficiency can be easily found by crop water productivity. The developed Sugarcane yield actual evapotranspiration (AET) model using regression techniques for the F2 stage and both with and without AET model for F3 stage except 2019-20 in Haridwar district and the developed sugarcane yield model with and without AET using regression techniques for the F2 and F3 stage in Dehradun district showed a good relationship between predicted and observed values of yield which is below 5% deviation. From the study of crop water productivity, we can easily mark the areas with low water productivity and used different planning to increase the water efficiency to fulfill the need of people in reducing water availability. IntroductionSugarcane (Saccharum officinarum L.) is one of India's most important economic beneficial crops, which plays a vital role in the country's agriculture and industrial development (Natarajan et al. 2016). Global production of sugarcane in 2018

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Evapotranspiration and biogeochemical regulation in a mountain peatland: insights from eddy covariance and ionic balance measurements

Cited by 9 publications

References 68 publications

Peatland carbon chemistry, amino acids and protein preservation in biogeochemically distinct ecohydrologic layers

Peatland carbon chemistry, amino acids and protein preservation in biogeochemically distinct ecohydrologic layers

Dynamics of Organic Nitrogen Compound Mineralization in Organic Soils under Grassland, and the Mineral N Concentration in Groundwater (A Case Study of the Mazurian Lake District, Poland)

Application of Remote Sensing and GIS in Crop Yield Forecasting and Water Productivity

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