Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.5194/bg-22-6411-2025 |
Lizenz  |
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| Titel (primär) | Breathing storms: Enhanced ecosystem respiration during storms in a heterotrophic headwater stream |
| Autor | Jativa, C.; Lupon, A.; Lannergård, E.; Ledesma, J.L.J.
; Rocher-Ros, G.; Peñarroya, X.; Bernal, S. |
| Quelle | Biogeosciences |
| Erscheinungsjahr | 2025 |
| Department | HDG |
| Band/Volume | 22 |
| Heft | 21 |
| Seite von | 6411 |
| Seite bis | 6425 |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Supplements | Supplement 1 |
| Abstract | Hydrological
disturbances following storm events influence the structure and
functioning of headwater streams. However, understanding how these
disturbances impact critical processes such as stream metabolism is
challenging. We assessed the effect of storm events on the resistance
and resilience of gross primary production (GPP) and ecosystem
respiration (ER) in a heterotrophic headwater stream. We hypothesized
that stream metabolism will show low resistance to storm events because
GPP and ER will be either stimulated by inputs of limited resources
(small storms) or suppressed by biofilm damage (large storms). We also
expected resilience to decrease with the size of the storm event. To
test these hypotheses, we hydrologically characterized 53 individual
storm events during 4.5 years (period October 2018–February 2023) and
estimated metabolic rates prior, during, and after each event.
Individual storm events had different duration (from 4 to 32 d), and
exhibited contrasting changes in discharge (discharge from 0.6 to
872.4 L s−1). Due to data
and model constraints, we were able to estimate metabolic rates for 35
of these events, for which GPP and ER averaged 1.7 ± 1.8 and −13.4 ± 7 g O2 m−2 d−1,
respectively. The two processes showed low resistance to storm events,
with magnitudes increasing in 69 % and 86 % of the cases for GPP and ER,
respectively. The relationship between hydrological parameters and
changes in GPP was not statistically significant, while a positive
relation with the magnitude of the storm event was found for ER (R2 > 0.37). Similarly, recovery times were positively related to the size of the event only for ER (R2 > 0.46).
Yet recovery times were always lower than 6 d, suggesting that the
positive effect of resource inputs on stream metabolic activity was
limited over time. Our findings support the idea that storm events
stimulate metabolic activity in headwater streams, especially ER, and
highlight how changes in hydrological regimes could impact stream
functioning and its role in global biogeochemical cycles. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=31531 |
| Jativa, C., Lupon, A., Lannergård, E., Ledesma, J.L.J., Rocher-Ros, G., Peñarroya, X., Bernal, S. (2025): Breathing storms: Enhanced ecosystem respiration during storms in a heterotrophic headwater stream Biogeosciences 22 (21), 6411 - 6425 10.5194/bg-22-6411-2025 |
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