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Sediment Respiration Pulses in Intermittent Rivers and Ephemeral Streams

descriptionPublicationkeyboard_double_arrow_right Article , Other literature type , Journal 01 Oct 2019Embargo end date: 01 Oct 2019 France, Spain, Canada, Spain, France, Italy, Switzerland, Italy, France, United Kingdom, Germany, Australia, Australia, Italy, Croatia, Australia, France, Australia, Australia, Spain, Australia, Australia, France, Canada, Croatia, Australia, France, France, France Publisher:American Geophysical Union (AGU)Journal:Global Biogeochemical Cycles, volume 33, pages 1,251-1,263 (issn: 0886-6236, eissn: 1944-9224,

Authors: Eduardo J. Martín; Alisha L. Steward; Fiona Dyer; María Isabel Arce; María Isabel Arce; Angus R. McIntosh; Andy Banegas-Medina; +98 Authors

doi: 10.1029/2019gb006276 , 10.5167/uzh-180858

handle: 20.500.14243/376245 , 10481/57826 , 2318/1843862 , 10072/391314 , 11343/286510 , 10900/105630

Sediment Respiration Pulses in Intermittent Rivers and Ephemeral Streams

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Abstract

AbstractIntermittent rivers and ephemeral streams (IRES) may represent over half the global stream network, but their contribution to respiration and carbon dioxide (CO2) emissions is largely undetermined. In particular, little is known about the variability and drivers of respiration in IRES sediments upon rewetting, which could result in large pulses of CO2. We present a global study examining sediments from 200 dry IRES reaches spanning multiple biomes. Results from standardized assays show that mean respiration increased 32‐fold to 66‐fold upon sediment rewetting. Structural equation modeling indicates that this response was driven by sediment texture and organic matter quantity and quality, which, in turn, were influenced by climate, land use, and riparian plant cover. Our estimates suggest that respiration pulses resulting from rewetting of IRES sediments could contribute significantly to annual CO2 emissions from the global stream network, with a single respiration pulse potentially increasing emission by 0.2–0.7%. As the spatial and temporal extent of IRES increases globally, our results highlight the importance of recognizing the influence of wetting‐drying cycles on respiration and CO2 emissions in stream networks.

Countries

France, Spain, Canada, Spain, France, Italy, Switzerland, Italy, France, United Kingdom, Germany, Australia, Australia, Italy, Croatia, Australia, France, Australia, Australia, Spain, Australia, Australia, France, Canada, Croatia, Australia, France, France, France

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Keywords

[SDE] Environmental Sciences, Carbon sequestration, Atmospheric Science, Atmospheric sciences, 550, river, Atmospheric Science, Global and Planetary Change, General Environmental Science, Environmental Chemistry river, stream, intermittent, temporary, respiration, 2306 Global and Planetary Change, CO; 2; intermittent; respiration; river; stream; temporary, Oceanography, Captura i emmagatzematge de diòxid de carboni, General Environmental Science, River, Global and Planetary Change, Multidisciplinary, Respiration, stream respiration, Sediments fluvials, Life Sciences, Institute of Evolutionary Biology and Environmental Studies, CO2 emissions ; C cycling ; stream respiration, temporary, CO, intermittent, 2304 Environmental Chemistry, Physical Sciences, [SDE]Environmental Sciences, 590 Animals (Zoology), CO2, Life Sciences & Biomedicine, Geosciences, 570, 2300 Environmental Science, [SDE.MCG]Environmental Sciences/Global Changes, Intermittent, CO2 emissions, 333, River sediments, Rivers, 1902 Atmospheric Science, Environmental Chemistry, Cursos d'aigua, Science & Technology, stream, River ; Stream ; Intermittent ; Temporary ; Respiration ; CO2, [SDE.MCG] Environmental Sciences/Global Changes, Geochemistry, CO 2, C cycling, 570 Life sciences; biology, Stream, Environmental Sciences, Temporary, respiration

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	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 10%
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Top 1%