When water returns: Drying history shapes respiration and nutrients release of intermittent river sediment

Schreckinger, José; Mutz, Michael; Mendoza‐Lera, Clara

doi:10.1016/j.scitotenv.2022.155950

Cited by 8 publications

(9 citation statements)

References 52 publications

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“…We were surprised that modest rain events did not generate a pulse in CO 2 from rewetted sediments in expanded surface water of the isolated pool. It may be that severe drying caused a delay in the respiration pulse in some sediments (Schreckinger et al., 2022). While rain events were associated with a drop in CO 2 , concentrations would rise again when the rain stopped and stream surface water again contracted.…”

Section: Discussionmentioning

confidence: 99%

“…Stream CO 2 concentrations result from external inputs and the internal uptake and mineralization of organic matter (Hotchkiss et al., 2015), including dissolved organic matter (DOM; Battin et al., 2008). The duration for which both the OM substrates and respired CO 2 remain in a given reach along the network is subject to flow velocity as well as the legacies of past flows (Schreckinger et al., 2022; Zhang et al., 2021). The movement of carbon through streams remains an understudied area, especially since fluxes can be heterogeneous over space and time even within a single stream (Bretz et al., 2021; Crawford et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

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Carbon Biogeochemistry and Export Governed by Flow in a Non‐Perennial Stream

Bretz,

Murphy,

Hotchkiss

2023

Water Resources Research

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Non‐perennial headwaters experience extremes in flow conditions that likely influence carbon fate. As surface waters contract through dry periods, reconnect during storms, and re‐expand or dry again, there is a great deal of variability in carbon emissions and export. We measured discharge, dissolved oxygen, carbon dioxide (CO2), and dissolved organic carbon (DOC) continuously in a persistent pool at the base of a non‐perennial, forested headwater stream in the southeastern United States to characterize how flow changes affect carbon emissions and export as the stream expands and shrinks. We also compared carbon concentrations and export during different stream flow categories before and after fall wet‐up. CO2 concentrations were high when discharge was lowest (median = 10.2 mg L−1) and low during high flows (3.2 mg L−1) and storms (1.1 mg L−1). High CO2 concentrations led to high emissions on a per area basis during low flow times, but whole‐channel stream CO2 emissions were limited by the small surface area of the stream during periods of surface water disconnection. DOC concentration varied by season (range = 0.1–16.2 mg L−1) with large pulses during smaller summer storms. We found that CO2 and DOC concentrations differed among binned stages of stream flow. As non‐perennial streams become more prevalent across the southeastern United States due to shifts in climate, the relationships between flow and carbon movement into and out of stream networks will become increasingly critical to understanding stream carbon biogeochemistry.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carbon Biogeochemistry and Export Governed by Flow in a Non‐Perennial Stream

Bretz,

Murphy,

Hotchkiss

2023

Water Resources Research

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“…2. Since our literature review, several notable studies examining GHG fluxes from dry inland waters have been published (e.g., Arce et al, 2023;Bretz et al, 2021;DelVecchia et al, 2021;Koschorreck et al, 2022;Paranaíba et al, 2021;Pinto et al, 2021;Schreckinger et al, 2022). However, there is still a marked shortage of studies on GHG fluxes from isolated pools in IRES, with most studies focused on dry sediments (Bonada et al, 2020).…”

Section: Future Re S E Arch D Irec Ti On Smentioning

confidence: 99%

“…Furthermore, studies that measured GHG fluxes from dry and rewetting IRES most commonly measured CO 2 , with few studies measuring CH 4 and N 2 O. A similar tendency was observed in studies of river networks fragmented by damming, where fewer studies included measurements of N 2 O when compared to CH 4 and CO 2 . Since our literature review, several notable studies examining GHG fluxes from dry inland waters have been published (e.g., Arce et al, 2023; Bretz et al, 2021; DelVecchia et al, 2021; Koschorreck et al, 2022; Paranaíba et al, 2021; Pinto et al, 2021; Schreckinger et al, 2022). However, there is still a marked shortage of studies on GHG fluxes from isolated pools in IRES, with most studies focused on dry sediments (Bonada et al, 2020).…”

Section: Future Research Directionsmentioning

confidence: 99%

Greenhouse gas dynamics in river networks fragmented by drying and damming

Silverthorn,

López‐Rojo,

Foulquier

et al. 2023

Freshwater Biology

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River fragmentation by drying and damming is occurring more frequently in the Anthropocene era, yet there is limited knowledge of how this fragmentation influences greenhouse gas (GHG) fluxes in river networks. River networks have the potential to be important sources of GHGs to the atmosphere through both similar and dissimilar mechanisms associated with temporary (drying) and permanent (damming) fragmentation. We conducted a review of the literature and found 49, 43 and six studies about GHGs (CO2, CH4 and N2O) in rivers impacted by damming, drying and their interaction, respectively. We found research lacking in non‐arid climates and in small water‐retention structures for studies regarding drying and damming, respectively. The major factors directly influencing GHG fluxes in river networks impacted by drying were sediment moisture, temperature, organic matter content and texture. In networks impacted by damming, the most influential factors were water temperature, dissolved oxygen, and phytoplankton Chlorophyll‐a. Based on our literature review and meta‐ecosystem theory, we propose that the spatial distribution of fragmentation strongly influences GHG fluxes at the river‐network scale. The actionable future research directions identified here will help to improve our understanding of the effects of fragmentation by drying and damming on GHG fluxes, with the potential to inform river management and climate change mitigation strategies.

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“…The intricate interplay of factors influencing the spatiotemporal patterns of internal nutrient release comprises a complex puzzle . Parameters such as temperature fluctuations, sediment composition, redox conditions, and microbial activities collectively shape the nutrient flux dynamics. − However, untangling the web of interactions and elucidating their cumulative effect on nutrient release remain scientific endeavors of paramount importance.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Variation and Dynamics of Endogenous Nutrient Fluxes from Sediments in Hangzhou West Lake

Yang,

Fang,

Feng

et al. 2023

ACS EST Water

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This study conducts a comprehensive investigation of the sediment dynamics of West Lake. The research finds intricate relationships between sediment nutrient release and various environmental factors. Sedimentological tests suggest that the concentrations of TN, TP, and NH 4 + -N in sediment are mainly influenced by the physicochemical properties of sediment and overlying water. Laboratory experiments uncover that a temperature increase of 2−3 °C can elevate phosphorus efflux from sediment by approximately 15%. The presence of submerged plants, mainly in areas with direct water diversion, is linked to a decrease in nutrient efflux from sediment at a rate of about 25%. Analysis of microbial communities in sediment samples indicates the dominance of Proteobacteria and Bacteroidetes, which are proposed to play a key role in degrading organic matter and nutrient recycling in sediment. The activity of these microorganisms is estimated to reduce the level of nutrient efflux from sediment by 18%. Principal component analysis further verifies the spatial heterogeneity among sampling sites, with the primary principal components explaining 68% of variations. These findings not only provide insights into biogeochemical processes in freshwater ecosystems but also underscore the importance of integrated management to ensure long-term sustainability of aquatic environments.

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When water returns: Drying history shapes respiration and nutrients release of intermittent river sediment

Cited by 8 publications

References 52 publications

Carbon Biogeochemistry and Export Governed by Flow in a Non‐Perennial Stream

Carbon Biogeochemistry and Export Governed by Flow in a Non‐Perennial Stream

Greenhouse gas dynamics in river networks fragmented by drying and damming

Spatiotemporal Variation and Dynamics of Endogenous Nutrient Fluxes from Sediments in Hangzhou West Lake

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