Sediment drying-rewetting cycles enhance greenhouse gas emissions, nutrient and trace element release, and promote water cytogenotoxicity

Paranaíba, José R.; Quadra, Gabrielle Rabelo; Josué, Iollanda I. P.; Almeida, Rafael M.; Mendonça, Raquel; Cardoso, Simone Jaqueline; Silva, Júlio Augusto Mendes da; Kosten, Sarian; Campos, José Marcello Salabert de; Almeida, Joseane; Araújo, Rafael Lethournon; Roland, Fábio; Barros, Nathan

doi:10.1371/journal.pone.0231082

Cited by 20 publications

(5 citation statements)

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“…According to our results, the input of this fresh terrestrial organic matter might affect these aquatic ecosystem's role to regional and global carbon cycle, perhaps increasing CO 2 evasion in the first moment (as recently demonstrated by Pinheiro et al 2021) but leading to CO 2 sinks due to N and P accumulation in a longer time scale (Tonetta et al, 2018). However, studies have shown that rewetting sediments previously exposed to direct contact with the atmosphere boosts carbon emissions (especially CO 2 ) (Kosten et al, 2018;Paranaı ´ba et al, 2020), in addition to releasing large amounts of nutrients (N and P) and trace elements (Iron, Manganese and Zinc) to the water column. This shift in the metabolic conditions may explain the very unstable CO 2 balance in semiarid eutrophic reservoirs as recently recorded (Mendonc ¸a Jr.…”

Section: Discussionsupporting

confidence: 65%

Fresh terrestrial detritus fuels both heterotrophic and autotrophic activities in the planktonic food web of a tropical reservoir: a mesocosm study

et al. 2021

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Inland aquatic ecosystems play an important role in the global carbon cycle as they actively mineralize large amounts of terrestrial organic matter. However, there is not much evidence that this allochthonous organic matter affects the energy and matter flow through trophic chain via the microbial food web in tropical reservoirs. We hypothesize that the fresh terrestrial dissolved organic matter (DOM) input in aquatic ecosystems increases net heterotrophy via microbes. A field experiment was conducted in mesocosms, with two treatments: one received detritus input of freshly sampled terrestrial vegetation and the other treatment had no additions (control). The detritus input resulted in increased net heterotrophy and respiration rates after 2 days and increased primary production after 21 days. Moreover, it also changed the zooplankton community to the dominance of copepods, cyclopoids and rotifers, which could have stabilized bacterial abundance and increased bacterial respiration (BR). Our results suggest that fresh terrestrial organic matter input in aquatic systems experiencing wide water level fluctuations (e.g. due to changes in climatic patterns) affect metabolism through two main pathways: (i) initially increasing net heterotrophy via direct DOM bacterial

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Section: Discussionsupporting

confidence: 65%

Fresh terrestrial detritus fuels both heterotrophic and autotrophic activities in the planktonic food web of a tropical reservoir: a mesocosm study

et al. 2021

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“…Taking into account all sampling points, CO 2 emissions from El Gergal drawdown areas were negatively related to the distance to the shore (r = -0.18; p < 0.05, Fig. 3a), revealing that recently exposed sediments sustain higher CO 2 emission (Jin et al, 2016;Paranaíba et al, 2020), and pointing out the role of rapid hydrological changes on CO 2 evasion from drawdown. Exposed sediments particle size also depicted a negative relation with CO 2 emission, with significant higher CO 2 efflux in fine sand areas than in coarse sand zones, while there were no CO 2 emissions from the larger particle's patches (see Fig.…”

Section: Resultsmentioning

confidence: 98%

“…In agreement, we found a positive and significant relationship between exposed sediment temperature and distance to the shoreline (r = 0.24; p < 0.001), so warmer exposed sediments were also probably the drier, and some water content is essential as a transport medium for nutrients required by microbial communities. Accordingly, Paranaíba et al (2020) found peaks in CO 2 emissions when exposed reservoir sediments transitioned from wet to dry, with fluxes declining as sediments dry out.…”

Section: Resultsmentioning

confidence: 98%

Carbon dioxide emission from drawdown areas of a Mediterranean reservoir

Pozzo-Pirotta¹,

Montes-Pérez²,

Sammartino³

et al. 2022

Limnetica

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Carbon dioxide emission from drawdown areas of a Mediterranean reservoirSediment beds from drawdown areas of reservoirs constitute a relevant hotspot for carbon dioxide (CO 2 ) emission to the atmosphere. This CO 2 source is especially relevant in the case of Mediterranean reservoirs, where hydrological variability favors the exposure of large sediment areas to air. In spite of this, the role of dry sediments as CO 2 emitters has been typically neglected in lakes and reservoirs greenhouse gas emission assessments, and there is also a lack of research on the spatial variability of CO 2 fluxes from drawdown sediments. In this study we contribute to this knowledge by combining drone-based aero-photogrammetry techniques with in situ infrarred gas analyzer measurements to assess the magnitude and spatial variability of CO 2 fluxes from the drawdown area of a Mediterranean reservoir (El Gergal, Southwestern Spain) during one dry season. Our results show that during survey dry sediments in El Gergal were a relevant net CO 2 source to the atmosphere, with a mean emission of 0.36 ± 0.38 g CO 2 m -2 h -1 . In addition, CO 2 fluxes from El Gergal drawdown depict a marked spatial variability, with maximum values measured in areas influenced by river or intermittent streams discharges. Distance to the shore, sediment particle size, pH and temperature also have a significant effect on CO 2 emissions from the reservoir dry banks. The expected strengthening of droughts intensity and frequency in the Mediterranean region could enhance the role of exposed sediments from the drawdown of reservoirs as CO 2 source to the atmosphere.

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“…Consequently, there is a rationale for allowing marginal trees to develop, providing shade to mitigate against extreme heat and the potential for such disbenefits to occur (Kail et al, 2021). Trees may also help to mitigate the potential disbenefit of enhanced greenhouse gas emissions from temporary ponds, which have been observed as a result of sediment drying–rewetting cycles (Obrador et al, 2018; Paranaíba et al, 2020). Our results indicate that features are significant sinks for POC, however the extent to which this carbon remains in situ is not yet fully understood.…”

Section: Discussionmentioning

confidence: 99%

Nature‐based solutions enhance sediment and nutrient storage in an agricultural lowland catchment

Robotham

Old

Rameshwaran

et al. 2022

Earth Surf Processes Landf

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In this paper, nature-based solutions (NBS) include: (1) natural flood management (NFM) interventions with a primary function of flood risk reduction but with additional multiple benefits for water quality improvements through the mitigation of diffuse pollution; and (2) ponds with a primary function of water quality improvement.This study assesses the ability of these NBS to trap pollutants in run-off within two small (3.4 km 2 ) agricultural catchments (Upper Thames, UK). The masses of sediment, phosphorus, and organic carbon trapped by 14 features (since construction 2-3 years previously) were quantified through sediment surveying and sampling.

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Sediment drying-rewetting cycles enhance greenhouse gas emissions, nutrient and trace element release, and promote water cytogenotoxicity

Abstract: OPEN ACCESS Citation: Paranaíba JR, Quadra G, Josué IIP, Almeida RM, Mendonça R, Cardoso SJ, et al. (2020) Sediment drying-rewetting cycles enhance greenhouse gas emissions, nutrient and trace element release, and promote water cytogenotoxicity. PLoS ONE 15(4): e0231082.

Cited by 20 publications

References 84 publications

Fresh terrestrial detritus fuels both heterotrophic and autotrophic activities in the planktonic food web of a tropical reservoir: a mesocosm study

Fresh terrestrial detritus fuels both heterotrophic and autotrophic activities in the planktonic food web of a tropical reservoir: a mesocosm study

Carbon dioxide emission from drawdown areas of a Mediterranean reservoir

Nature‐based solutions enhance sediment and nutrient storage in an agricultural lowland catchment

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