Garcia-Franco, N.* ; Wiesmeier, M.* ; Buness, V.* ; Berauer, B.J.* ; Schuchardt, M.A.* ; Jentsch, A.* ; Schlingmann, M.* ; Andrade Linares, D.R. ; Wolf, B.* ; Kiese, R.* ; Dannenmann, M.* ; Kögel-Knabner, I.*
Rapid loss of organic carbon and soil structure in mountainous grassland topsoils induced by simulated climate change.
Geoderma 442:116807 (2024)
Mountainous grassland soils are considered one of the most unique biological hotspots, rich in organic carbon (OC). At the same time, they are exposed to great threats, as climate warming is more pronounced in mountainous regions than in lowland areas. In this study, we assessed the effect of simulated warming (+1K, +2K, and + 3 K) on OC stocks and soil structure in grassland soils of the Northern Limestone Alps in Germany by translocating plant-soil mesocosms from high- (1260 m a.s.l., Rendzic Phaeozem) and mid- (860 m a. s. l., Haplic Cambisol) to low-elevation (600 m a.s.l). Plant-soil mesocosms were exposed to both extensive and intensive grassland management practices. Four years after translocation, we observed a rapid decrease of topsoil SOC stocks under intensive (−1.0 t C ha yr−1) and extensive management (-2.2 t C ha yr−1), under the highest temperature increase. Intensive management with about 1 t C ha−1 yr−1 higher manure C return than extensive management (1.6 vs. 0.8 t C ha−1 yr−1 intensive and extensive, respectively) may explain the difference in SOC losses between different management treatments. Under both management practices, the loss of SOC was mainly associated with a decrease of large macroaggregates, at both management practices. In addition, different aggregate specific OC loss rates resulted in an altered distribution of OC among the aggregate size classes. Our study provides evidence that simulated climate change induced a rapid and substantial decline of SOC in mountainous, OC-rich grassland soils, which may be attributed to decreased physical OC protection within large macroaggregates. Optimized grassland management in form of increased application of organic fertilizers could only partially offset the SOC loss by improved formation of small macroaggregates.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Typ der Hochschulschrift
Herausgeber
Schlagwörter
Grassland Management ; Mountainous Soils ; Plant-soil Mesocosms ; Soil Aggregates; Storage; Temperature; Dynamics; Nitrogen; Aggregation; Variability; Feedbacks; Stability; Turnover; Patterns
Keywords plus
Sprache
englisch
Veröffentlichungsjahr
2024
Prepublished im Jahr
0
HGF-Berichtsjahr
2024
ISSN (print) / ISBN
0016-7061
e-ISSN
1872-6259
ISBN
Bandtitel
Konferenztitel
Konferzenzdatum
Konferenzort
Konferenzband
Quellenangaben
Band: 442,
Heft: ,
Seiten: ,
Artikelnummer: 116807
Supplement: ,
Reihe
Verlag
Elsevier
Verlagsort
Radarweg 29, 1043 Nx Amsterdam, Netherlands
Tag d. mündl. Prüfung
0000-00-00
Betreuer
Gutachter
Prüfer
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Veröffentlichungsdatum
0000-00-00
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0000-00-00
Anmelder/Inhaber
weitere Inhaber
Anmeldeland
Priorität
Begutachtungsstatus
Peer reviewed
POF Topic(s)
30202 - Environmental Health
Forschungsfeld(er)
Environmental Sciences
PSP-Element(e)
G-504700-001
Förderungen
German Ministry for Education and Research (BMBF)
Copyright
Erfassungsdatum
2024-04-23