Academic Journal
Sediment respiration pulses in intermittent rivers and ephemeral streams
| Τίτλος: | Sediment respiration pulses in intermittent rivers and ephemeral streams |
|---|---|
| Συγγραφείς: | 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., Zoppini, A. |
| Στοιχεία εκδότη: | American Geophysical Union |
| Έτος έκδοσης: | 2019 |
| Συλλογή: | James Cook University, Australia: ResearchOnline@JCU |
| Περιγραφή: | 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. |
| Τύπος εγγράφου: | article in journal/newspaper |
| Περιγραφή αρχείου: | application/pdf |
| Γλώσσα: | unknown |
| Relation: | https://doi.org/10.1029/2019GB006276; https://researchonline.jcu.edu.au/60476/; https://researchonline.jcu.edu.au/60476/6/60476.pdf |
| Διαθεσιμότητα: | https://researchonline.jcu.edu.au/60476/6/60476.pdf |
| Rights: | restricted |
| Αριθμός Καταχώρησης: | edsbas.2C237BF3 |
| Βάση Δεδομένων: | BASE |
| FullText | Text: Availability: 0 CustomLinks: – Url: https://researchonline.jcu.edu.au/60476/6/60476.pdf# Name: EDS - BASE (ns324271) Category: fullText Text: View record from BASE |
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| Header | DbId: edsbas DbLabel: BASE An: edsbas.2C237BF3 RelevancyScore: 813 AccessLevel: 3 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 813.215454101563 |
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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%. 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