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Title: Litter layer influence on the thermal regime of a sandy soil under a pine forest in mediterranean Portugal
Authors: Andrade, José
Abreu, Francisco
Keywords: pine forest
litter layer
soil temperature
Mediterranean climate
Issue Date: Sep-2004
Citation: Andrade, J. , Abreu, F. 2004 Litter layer influence on the thermal regime of a sandy soil under a pine forest in mediterranean Portugal In International symposium: “Forest Soils under global and local changes: from research to practice, 15-18 September 2004, Bordeux
Abstract: Decomposition of needle litter is a relevant process in applied ecology, namely in the nutrient dynamics of forested ecosystems. Soil temperature strongly influences soil microbian activity. Temperature profiles of a sandy soil (Haplic Podzol) under a pine forest were measured at several depths down to 16 cm, with and without litter layer. Daily cycles were analysed by means of Fourier series. Daily cycles were studied based on data from four days defined according to soil water content. The daily periodic variations of soil temperature follow closely the time-course of solar irradiance. Daily course of soil temperature is generally well described by the two first Fourier harmonics. The litter layer acts as a thermal insulator, reducing soil temperature gradients and amplitudes and increasing damping depth, particularly in dry soil.
Type: lecture
Appears in Collections:GEO - Comunicações - Em Congressos Científicos Internacionais

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