Labile and stabile soil organic carbon fractions in surface horizons of mountain soils : relationships with vegetation and altitude.
PBN-AR
Instytucja
Wydział Chemii (Uniwersytet Wrocławski)
Źródłowe zdarzenia ewaluacyjne
Informacje podstawowe
Główny język publikacji
en
Czasopismo
Journal of Mountain Science (20pkt w roku publikacji)
ISSN
1672-6316
EISSN
1993-0321
Wydawca
Springer
Rok publikacji
2017
Numer zeszytu
12
Strony od-do
2391-2405
Numer tomu
14
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
en
Soil organic matter
Humus fractions
Dissolved organic carbon
Organic carbon pools
Mountain soils
vegetation
climate
Streszczenia
Język
en
Treść
Global and local climate changes could disturb carbon sequestration and carbon stocks in forest soils. Thus, it is important to characterize the stability of soil organic matter and the dynamics of soil organic carbon (SOC) fractions in forest ecosystems. This study had two aims: (1) to evaluate the effects of altitude and vegetation on the content of labile and stabile forms of organic carbon in the mountain soils; and (2) to assess the impact of the properties of soil organic matter on the SOC pools under changing environmental conditions. The studies were conducted in the Karkonosze Mountains (SW Poland, Central Europe). The content of the most labile fraction of carbon (dissolved organic carbon, DOC) decreases with altitude, but the content of fulvic acids (FA), clearly increases in the zone above 1000 m asl, while the stabile fraction (humins, non-hydrolyzing carbon) significantly decreases. A higher contribution of stabile forms was found in soils under coniferous forests (Norway spruce), while a smaller - under deciduous forests (European beech) and on grasslands. The expected climate change and the ongoing land use transformations in the zone above 1000 m asl may lead to a substantial increase in the stable humus fraction (mainly of a non-hydrolyzing carbon) and an increase in the SOC pools, even if humus acids are characterized by a lower maturity and greater mobility favorable to soil podzolization. In the lower zone (below 1000 m asl), a decrease in the most stable humus forms can be expected, accompanied by an increase of DOC contribution, which will result in a reduction in SOC pools. Overall, the expected prevailing (spatial) effect is a decreasing contribution of the most stable humus fractions, which will be associated with a reduction in the SOC pools in medium-high mountains of temperate zone of Central Europe.
Cechy publikacji
original-article
Inne
System-identifier
2017CH8323
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