Sediment respiration pulses in intermittent rivers and ephemeral streams

von Schiller, D., Datry, T., Corti, R., Foulquier, A., Tockner, K., Marcé, R., García-Baquero, G., Odriozola, I., Obrador, B., Elosegi, A., Mendoza-Lera, C., Gessner, M.O., Stubbington, R., Albariño, R., Allen, D.C., Altermatt, F., Arce, M., Arnon, S., Banas, D., Banegas-Medina, A., Beller, E., Blanchette, M.L, Blanco-Libreros, J.F., Blessing, J., Boëchat, I., Boersma, K., Bogan, M.T., Bonada, N., Bond, N., Brintrup, K., Bruder, A., Burrows, R.M., Cancellario, T., Carlson, S., Cauvy-Fraunié, S., Cid, N., Danger, M., de Freitas Terra, B., Dehedin, A., De Girolamo, A.M., del Campo, R., Díaz-Villanueva, V., Duerdoth, C., Dyer, F., Faye, E., Febria, C., Figueroa, R., Four, B., Gafny, S., Gómez, R., Gómez-gener, L., Graça, M.A.S., Guareschi, S., Gücker, B., Hoppeler, F., Hwan, J.L, Kubheka, S., Laini, A., Langhans, S.D, Leigh, C., Little, C.J., Lorenz, S., Marshall, J., Martín, E.J., Mcintosh, A., Meyer, E.I., Miliša, M., Mlambo, M.C., Moleón, M., Morais, M., Negus, P., Niyogi, D., Papatheodoulou, A., Pardo, I., Pařil, P., Pešić, V., Piscart, C., Polášek, M., Rodríguez-Lozano, P., Rolls, R.J., Sánchez-Montoya, M.M., Savić, A., Shumilova, O., Steward, A., Taleb, A., Uzan, A., Vander Vorst, R., Waltham, N., Woelfle-Erskine, C., Zak, D., Zarfl, C., and Zoppini, A. (2019) Sediment respiration pulses in intermittent rivers and ephemeral streams. Global Biogeochemical Cycles, 33 (10). pp. 1251-1263.

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Abstract

Intermittent 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 32–66-fold upon sediment rewetting. Structural equation modelling 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.

Item ID: 60476
Item Type: Article (Research - C1)
ISSN: 1944-9224
Keywords: river, stream, intermittent, temporary, respiration CO₂
Copyright Information: ©2019. American Geophysical Union. All Rights Reserved.
Funders: EU, EU, Spanish Ministry of Science, Innovation and Universities (SMSIU), Swiss National Science Foundation (SNSF), INTER-COST, EU / LIFE Programme, Basque Government (BG), European Cooperation in Science and Technology (COST)
Projects and Grants: EU Grant Number: 748625, EU Grant Numbers: LIFE13 ENV/ES/000341, 603629, SMSIU Grant Numbers: CGL2017‐86788‐C3‐3‐P, CGL2017‐86788‐C3‐2‐P, SNSF Grant Numbers: PP00P3_179089, PP00P3_150698, INTER-COST Grant Number: LTC17017, BG Grant Number: IT‐951‐16, COST Grant Number: CA15113
Date Deposited: 02 Feb 2020 22:11
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060204 Freshwater Ecology @ 40%
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050205 Environmental Management @ 40%
05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change @ 20%
SEO Codes: 96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960506 Ecosystem Assessment and Management of Fresh, Ground and Surface Water Environments @ 50%
96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960807 Fresh, Ground and Surface Water Flora, Fauna and Biodiversity @ 50%
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