Temporal variability in evapotranspiration and energy partitioning over a seasonally flooded scrub forest of the Brazilian Pantanal

Silva, Jonh Billy da; Valle, Luiz Claudio Galvão do; Faria, Thiago Oliveira; Marques, João Basso; Dalmagro, Higo J.; Nogueira, José S.; Vourlitis, George L.; Rodrigues, Thiago Rangel

doi:10.1016/j.agrformet.2021.108559

Cited by 10 publications

(8 citation statements)

References 117 publications

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“…The study was conducted at the Brazilian Northern Pantanal Wetland (BR-Npw) flux tower (Figure 1) located approximately 35 km SE of Pocone, Mato Grosso, Brazil (16 o 29 0 53.71" S: 56 o 24 0 45.91" W; 120 m altitude). The site is part of a research station managed by the Federal University of Mato Grosso (UFMT) within a national reserve managed by the Brazilian Social Service of Commerce (SESC Pantanal) [23,24]. Our data were collected from 1 January 2015 to 31 December 2016.…”

Section: Pantanal Sitementioning

confidence: 99%

“…Site instrumentations are given in previous publications [21,22,24,26]. The gaps arising from the exclusion of spurious data during the rigorous screening process, were filled using the gap-filling algorithm of marginal distribution sampling (MDS) described by Reichstein et al [27], which takes into account the covariation of fluxes with meteorological variables and also the temporal self-correlation of fluxes.…”

Section: Instrumentation and Data Processingmentioning

confidence: 99%

See 1 more Smart Citation

The Relevance of Maintaining Standing Forests for Global Climate Balance: A Case Study in Brazilian Forests

Costa¹,

Silva²,

Mendes³

et al. 2023

Tropical Forests - Ecology, Diversity and Conservation Status

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Estimate Net Ecosystem Exchange (NEE) is important to better understand carbon exchanges between terrestrial ecosystems and the atmosphere. Comprehend these dynamics is essential to better understand the responses of environments to ongoing climatic changes. This study aims to analyze, with AMERIFLUX and LBA network measurements, the variability of NEE and climate variables in four different tropical coverages: Pantanal, Amazonia, Caatinga and Cerrado (savanna). Furthermore, was estimate the Gross Primary Productivity (GPP). We found a distinct seasonality of meteorological variables and CO2 fluxes in each site. Despite acting mostly as a CO2 sink, some environments already show worrying source data in certain periods, pointed out as a direct effect of the reduction of photosynthesis caused by land use changes. The preserved forest plays an important role in maintaining rainfall at a regional and global level, and its maintenance makes it possible, by the way, an important tool in combating global warming via carbon sequestration by trees, which requires commitment and public policies of environmental preservation and recovery of degraded areas.

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Section: Pantanal Sitementioning

confidence: 99%

Section: Instrumentation and Data Processingmentioning

confidence: 99%

The Relevance of Maintaining Standing Forests for Global Climate Balance: A Case Study in Brazilian Forests

Costa¹,

Silva²,

Mendes³

et al. 2023

Tropical Forests - Ecology, Diversity and Conservation Status

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“…Evapotranspiration affects the water cycle, extreme weather events, climate, the carbon cycle, regional water balance, cloud formation, agricultural management, drought detection, marine and terrestrial ecosystems (Aguilos et al, 2021;Berkowitz et al, 2020;da Silva et al, 2021;Eichelmann et al, 2018;Fisher et al, 2017;Frédette et al, 2019a;Queluz et al, 2018). Thus, ET is crucial to help answer questions posed by Fisher et al (2017), including "How can information on ET be applied to optimize sustainable water allocations, agricultural water use, food production, ecosystem management, and hence water and food security in a changing climate to meet the demands of a growing population?".…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of two categorically differing emergent wetland plants on evapotranspiration

Kiniry

Williams

Reisner

et al. 2023

Agrosystems Geosci & Env

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Although wetlands are an important component of many landscapes, emergent plants have had variable impacts on wetland hydrology. In the present study, similar to what others have done with emergent plants, we investigated the impacts of black willow (Salix nigra Marshall) and Pennsylvania smartweed (Persicaria pensylvanica L.) on water loss from standing water relative to water loss with no emergent plants from 2018 to 2020. Pans were established with soil and standing water for three replications of five treatments: open water control, low population density black willow, high density black willow, low density smartweed, and high density smartweed. Each week during the growing season water levels, water temperature, leaf area index, and height were recorded. Pans were then refilled to the standard level. The assumption was that open water was just evaporation and the increase in water loss in the presence of plants was due to transpiration. Thus, we could partition water loss between evaporation and transpiration by calculating the difference between pans without plants and pans with plants. This difference is the transpiration by the plants. Water temperature was measured to check on any possible shading effect. Open water evaporation was lower than black willow and smartweed evapotranspiration. Mean increases in water use relative to the control were 37% for smartweed and 66% for black willow. These differences were even more dramatic when calculated for only the last 2 years. Smartweed increased water use by 40% and black willow by 92%. Because pans with plants had lower maximum daily water temperatures than those of the control in the summer, the increased water loss with plants was largely due to transpiration. Smartweed transpired more than willows. The willow root system and leaf area greatly increased after the first year, resulting in more water loss and lower summer water temperature. Low and high density treatments did not differ significantly Abbreviations: BWH, black willow planted at high density; BWL, black willow planted at low density; ET, evapotranspiration; ETo, maximum potential ET; FIPAR, fraction of intercepted photosynthetically active radiation; k, light extinction coefficient; Kc, crop coefficient; LAI, leaf area index; PAR, photosynthetically active radiation; PET, potential evapotranspiration; SWH, smartweed planted at high density; SWL, smartweed planted at low density.

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“…It consists mainly of transpiration (T) via the stomata of plants, evaporation from the soil, and evaporation of water intercepted by the plant canopy and litter layer [1,2]. Determining the contribution of T to ET (hereafter T/ET) is a challenging task but necessary for understanding the response of ecosystem water balance under climate change [3][4][5]. A growing awareness of the importance of ecohydrology has motivated efforts to partition ET into its components, as a key to unravelling processes underlying ecosystem water use and its response to climate change [6,7].…”

Section: Introductionmentioning

confidence: 99%

Impact of Environmental Conditions and Seasonality on Ecosystem Transpiration and Evapotranspiration Partitioning (T/ET Ratio) of Pure European Beech Forest

Petrík

Zavadilová

Šigut

et al. 2022

Water

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Partitioning of evapotranspiration (ET) into transpiration (T) and residual evaporation (E) is a challenging but important task in order to assess the dynamics of increasingly scarce water resources in forest ecosystems. The T/ET ratio has been linked to the ecosystem water use efficiency of temperate forests, and thus is an important index for understanding utilization of water resources under global climate change. We used concurrent sap flow and eddy-covariance measurements to quantify the ET partitioning in pure European beech forest during the 2019–2020 period. The sap flow data were upscaled to stand level T and combined with stand level ET to calculate the T/ET ratio. We analysed intra-annual dynamics, the effect of seasonality and the impact of meteorological conditions on T, ET and T/ET. Annual T/ET of a pure European beech ecosystem was 0.48, falling at the lower end of reported global T/ET values for forest ecosystems. T/ET showed significant seasonal differences throughout spring (T/ET = 0.28), summer (T/ET = 0.62) and autumn (T/ET = 0.35). Air temperature (R2 = 0.45–0.63), VPD (R2 = 0.47–0.6) and PAR (R2 = 0.32–0.63) affected the daily dynamics of T, ET and T/ET; however, soil water content (SWC) had no significant effect. Mature European beech trees showed more anisohydric behaviour and relatively stable T/ET, even under decreasing SWC. The results improve the understanding of ecosystem scale T, ET and T/ET intra-annual dynamics and environmental constraints in anisohydric mature European beech.

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Temporal variability in evapotranspiration and energy partitioning over a seasonally flooded scrub forest of the Brazilian Pantanal

Cited by 10 publications

References 117 publications

The Relevance of Maintaining Standing Forests for Global Climate Balance: A Case Study in Brazilian Forests

The Relevance of Maintaining Standing Forests for Global Climate Balance: A Case Study in Brazilian Forests

Effects of two categorically differing emergent wetland plants on evapotranspiration

Impact of Environmental Conditions and Seasonality on Ecosystem Transpiration and Evapotranspiration Partitioning (T/ET Ratio) of Pure European Beech Forest

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