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precedente: P1.8
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livello superiore: P1
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seguente: P1.10
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P1.9 - Decomposition of Quercus ilex litter: a microcosm experiment -
first data
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Papa Stefania (1)*,
Cembrola Emanuela (1),
Fiorillo Maria Giovanna (1),
Fioretto Antonietta (1)
| (1) |
Dipart. di Scienze della Vita, Seconda Università degli Studi
di Napoli, Via Vivaldi 43, Caserta, Italia |
| * |
stefania.papa@unina2.it |
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Abiotic factors, such as climate, and biotic factors, such as the chemical
nature of litter and microbial activity, control leaf litter decay. It is
generally accepted that, under unfavourable climatic conditions, climate seems
to play the most important role in litter decomposition, whereas under
favourable climate, litter quality largely prevails. In this work Quercus
ilex leaf litter bags (2 mm mesh bags) was incubated in 10 microcosms under
controlled temperature (22
) and moisture (holding capacity)
conditions. Parameters measured for each microcosm included mass loss, carbon
dioxide evolution and active fungal biomass. The data showed that the
decomposition rate proceeded very quickly, about three times more elevated
respect to the same litter incubated in field. In fact, litter lost about 20%
of the initial leaf mass at the end of 2 months against the same value lost,
instead, in 10 months from Quercus ilex leaf litter incubated in the
Nature Reserve of Castel Volturno. The respiration rate did not show
significant variation between samplings; instead, active fungal biomass showed
an increase in the first decomposition phases. Besides, the litter before the
incubation already introduced microbial respiration and fungal colonization
even if to a low values. A positive and significant correlation was found
between active fungal biomass and mass loss.
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consulta l' Indice analitico (alfabetico per autore) |
sfoglia l' Indice delle sessioni del Congresso |
a cura di Comoglio, Comino, e Bona
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