Carbon fluxes above a deciduous forest in Greece

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Nikolaos Proutsos
Αristotle Liakatas
Stavros Alexandris
Ioannis Tsiros

Abstract

Photosynthetic production in forest ecosystems occurs through the absorption of light and CO2. The present work deals with CO2 and carbon flux densities above a deciduous forest in Greece, the southernmost monitoring site in Europe. Results show annual net carbon absorption of 7.6 t C ha–1 y–1, indicating that this forest is a strong carbon sink compared to other European sites. However, absorbance may be reduced by 1 μmol m–2 s–1 for every 1.5 ºC above-canopy air temperature increase or 0.015 cm3 cm–3 active root-zone moisture depletion, beyond estimated optimum values. The forest acts as a carbon sink from late April to early November and as a source of carbon in the remaining period of the year. The highest CO2 net absorption flux occurs during June-July (approximately 200 g C m–2 month–1).

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Author Biographies

Nikolaos Proutsos, Agricultural University of Athens

Department of Natural Resources Development and Agricultural University

Αristotle Liakatas, Agricultural University of Athens

Department of Natural Resources Development and Agricultural UniversityEmeritus Professor

Stavros Alexandris, Agricultural University of Athens

Department of Natural Resources Development and Agricultural University

Assistant Professor

Ioannis Tsiros, Agricultural University of Athens

Department of Crop Science

Associate Professor

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