| Title: |
Net CO2 emissions from dry inland waters persist in the presence of vegetation |
| Authors: |
Sharma, K.; Brothers, S.; Bernal, S.; Catalán, N.; Keller, P.; Koschorreck, Matthias; Kosten, S.; Leigh, C.; von Schiller, D.; Pastor, A.; Larrañaga, A.; Arı, A.; Camacho-Santamans, A.; Grinham, A.; Lupon, A.; Linkhorst, A.; Elosegi, A.; Obrador, B.; Eyre, B.D.; Trochine, C.; Muniz, C.C.; Feijoo, C.; Duvert, C.; Moreno-Ostos, E.; Garcia, E.; Sobreira Oliveira, E.; Cuassolo, F.; Fernandez, H.R.; Yeo, J.; Oakes, J.; Paranaíba, J.R.; Pegg, J.; Anselmo, J.; Montes-Perez, J.J.; van den Heuvel, L.; Ran, L.; Wilkinson, L.L.; Gómez-Gener, L.; Arroita, M.; Shanafield, M.; de Lourdes Gultemirian, M.; Arce, M.I.; Cobo, M.; Sánchez-Montoya, M.M.; Barros, N.; Wells, N.; Karakaya, N.; Ertürk Arı, P.; Struik, Q.; Aben, R.; Rimas, R.; Kumar, S.; Bansal, S.; Sarkar, S.; Rodríguez-Gómez, S.; Huang, T.; Silverthorn, T.; Datry, T.; Diaz Villanueva, V.; Marcé, R. |
| Source: |
ISSN: 0886-6236. |
| Publisher Information: |
American Geophysical Union (AGU), Washington, DC; Global Biogeochemical Cycles 40 (3);; e2025GB008801 |
| Publication Year: |
2026 |
| Subject Terms: |
carbon cycling; desiccation; dryflux; diel net CO2 emission; net ecosystem exchange |
| Description: |
Many inland waters are shrinking due to shifts in climate and water diversion for human uses. As they dry out, their exposed sediments emit large amounts of carbon dioxide (CO2) to the atmosphere. However, current global estimates of CO2 emissions from dry inland waters are derived exclusively from bare sediment dark-chamber measurements that do not account for the colonization of desiccated areas by vegetation. To understand the impact of vegetation on CO2 emissions from dry sediments, we analyzed 164 dry inland water bodies across five climatic regions and five inland water body types (lakes, ponds, reservoirs, streams and wetlands). On average, within vegetated zones, vegetation occupied 47±35% in measured biomass quadrants. Light-induced decreases in instantaneous CO2 emissions in vegetated dry sediments were lower (mean±SD=−3.7±12.9mmol CO2 m−2hr−1) than increases during dark conditions (14.7±20.1mmol CO2 m−2hr−1). Diel (24-hr) CO2 emissions from dry, vegetated sediments (mean±SD=100±261mmol CO2 m−2d−1) were 25% lower than in bare sediments (133±245mmol CO2 m−2d−1). These results indicate that vegetation can partially off-set sediment respiration, although the magnitude of this effect is insufficient to switch dry beds from net sources to net sinks of carbon. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=32236; https://dx.doi.org/10.1029/2025GB008801 |
| DOI: |
10.1029/2025GB008801 |
| Availability: |
https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=32236; https://doi.org/10.1029/2025GB008801 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.1456A8C1 |
| Database: |
BASE |