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Formation of soil phosphorus fractions along a climate and vegetation gradient in the Coastal Cordillera of Chile

Titelangaben

Brucker, Emanuel ; Spohn, Marie:
Formation of soil phosphorus fractions along a climate and vegetation gradient in the Coastal Cordillera of Chile.
In: Catena. Bd. 180 (2019) . - S. 203-211.
ISSN 0341-8162
DOI: https://doi.org/10.1016/j.catena.2019.04.022

Abstract

Despite the importance of hosphorus (P) for ecosystems, the effect of climate and vegetation on the formation of P fractions is not well understood. Therefore, we explored the formation of soil P fractions along a climosequencecovering an arid, semi-arid, Mediterranean and humid site in the Coastal Cordillera of Chile. We determined Hedley P fractions (water extractable P, labile P, secondary mineral P, apatite P and residual P) as well as total organic P (TOP) in two soils on each of the four study sites. We calculated apatite dissolution rates based on the soil production rate and the soil P fractions, which has never been done before, according to our knowledge.Apatite P was the dominant P fraction in the soils at the arid and the semiarid site, and it decreased from the arid to the humid site by 96%. Residual P and secondary mineral P dominated at the humid site. The increase inplant available P along the climosequence went along with an increase in TOP. Apatite was strongly positively correlated with soil pH across all soils. The apatite dissolution rate increased with mean annual precipitationfrom 0 to 34mgPm⁠−2 yr⁠−1, leading to an increase in plant available P (sum of water extractable P and labile P) along the climosequence from the arid to the humid site. In conclusion, our study shows that the extent to which apatite in soil is dissolved, and the apatite dissolution rate strongly increase with precipitation, leading to anincrease in the concentrations of secondary soil P fractions (secondary mineral P, labile P and TOP) along the climosequence.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER151091
Keywords: Nutrients; Climate sequence; Apatite weathering; Biogenic weathering; Soil turnover time
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie > Lehrstuhl Bodenökologie - Univ.-Prof. Dr. Eva Lehndorff
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
Eingestellt am: 24 Jan 2020 08:13
Letzte Änderung: 16 Mär 2023 14:37
URI: https://eref.uni-bayreuth.de/id/eprint/53801