Loss of monoterpenes from Umbellularia californica leaf litter

A litter bag experiment was conducted to study changes in foliar monoterpene yields (total, oxygenated monoterpenes, and monoterpene hydrocarbons) and per cent hydrocarbons in Umbellularia californica (California Bay Tree) leaf litter and to investigate how climate may influence this process. Monote...

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Veröffentlicht in:Biochemical systematics and ecology 1995, Vol.23 (6), p.581-591
Hauptverfasser: Wood, Swarup E., Gaskin, John F., Langenheim, Jean H.
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Sprache:eng
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Zusammenfassung:A litter bag experiment was conducted to study changes in foliar monoterpene yields (total, oxygenated monoterpenes, and monoterpene hydrocarbons) and per cent hydrocarbons in Umbellularia californica (California Bay Tree) leaf litter and to investigate how climate may influence this process. Monoterpene yields (mg g −1 original leaf dry wt.), and per cent hydrocarbons (ratio of hydrocarbon yield/total monoterpene yield) were not significantly different among green, yellow, and brown (newly fallen) foliage. Litter at moist sites absorbed water from rain significantly earlier in the season than that at dry sites and remained wetter than litter at dry sites throughout the collection period. Decomposition (mass lost) was not significantly different at all study sites. Oxygenated monoterpenes were lost to a greater extent than hydrocarbons. Total monoterpene yield decreased between 63% and 86% during the study period. Total monoterpene yields in litter at moist sites were significantly less than those at dry sites at the end of the study period. Most of the decrease in total monoterpene yield occurred during the period of greatest rainfall. The per cent of monoterpene hydrocarbons was significantly greater at the end of the rainy season than at the beginning and significantly greater at moist sites than dry sites. Loss of monoterpenes from litter was correlated with monoterpene water solubility ( r=0.82).
ISSN:0305-1978
1873-2925
DOI:10.1016/0305-1978(95)00087-9