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Different Cerrado Ecotypes Show Contrasting Soil Microbial Properties, Functioning Rates, and Sensitivity to Changing Water Regimes
CSIC, Spain; Univ Coimbra, Portugal.
Univ Fed Vicosa, Brazil.
CSIC, Spain.
Univ Western Sydney, Australia.
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2023 (Engelska)Ingår i: Ecosystems, ISSN 1432-9840, E-ISSN 1435-0629Artikel i tidskrift (Refereegranskat) Epub ahead of print
Abstract [en]

Soil moisture is among the most important factors regulating soil biodiversity and functioning. Models forecast changes in the precipitation regime in many areas of the planet, but how these changes will influence soil functioning, and how biotic drivers modulate such effects, is far from being understood. We evaluated the responses of C and N fluxes, and soil microbial properties to different soil water regimes in soils from the main three ecotypes of the worlds largest and most diverse tropical savanna. Further, we explored the direct and indirect effects of changes in the ecotype and soil water regimes on these key soil processes. Soils from the woodland savanna showed a better nutritional status than the other ecotypes, as well as higher potential N cycling rates, N2O emissions, and soil bacterial abundance but lower bacterial richness, whereas potential CO2 emissions and CH4 uptake peaked in the intermediate savanna. The ecotype also modulated the effects of changes in the soil water regime on nutrient cycling, greenhouse gas fluxes, and soil bacterial properties, with more intense responses in the intermediate savanna. Further, we highlight the existence of multiple contrasting direct and indirect (via soil microbes and abiotic properties) effects of an intensification of the precipitation regime on soil C- and N-related processes. Our results confirm that ecotype is a fundamental driver of soil properties and functioning in the Cerrado and that it can determine the responses of key soil processes to changes in the soil water regime.

Ort, förlag, år, upplaga, sidor
SPRINGER , 2023.
Nyckelord [en]
cerrado; ecotype; precipitation regime; C cycle; N cycle; greenhouse gases
Nationell ämneskategori
Naturgeografi
Identifikatorer
URN: urn:nbn:se:liu:diva-194173DOI: 10.1007/s10021-023-00838-0ISI: 000983776000001Scopus ID: 2-s2.0-85153360458OAI: oai:DiVA.org:liu-194173DiVA, id: diva2:1760763
Anmärkning

Funding Agencies|FCT [IF/00950/2014, SFRH/BDP/108913/2015]; MCTES; CFE research unit - FCT/MCTES through national funds (PIDDAC) [UIDB/04004/2020]; FSE; Marie Sklodowska-Curie Actions of the Horizon 2020 Framework Programme H2020-MSCA-IF-2016 under REA Grant (CLIMIFUN) [LRA17\1193]; BES (MUSGONET); CRUE-CSIC agreement; Springer Nature; UE; [702057]

Tillgänglig från: 2023-05-31 Skapad: 2023-05-31 Senast uppdaterad: 2023-10-16

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