Banca de DEFESA: GABRIEL HENRIQUE SANTOS SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : GABRIEL HENRIQUE SANTOS SILVA
DATE: 22/06/2020
TIME: 14:00
LOCAL: Sala de reuniões - Decol
TITLE:

Importance of abiotic and biotic predictors of the plant community on litter decomposition in a seasonal tropical forest: A long-term approach via mass balance


KEY WORDS:

functinal traits; biodiversity and ecosystem functioning;niche complementarity;decomposition;functional dispersion;selection effect;soil fetility;macronutrients;restinga


PAGES: 38
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Vegetal detritus decomposition is a key process in nutrient cycling and can be affected by both biotic and abiotic factors. Although many studies have evaluated the effects of litter diversity on its decomposition rate, most works use experimental and short-term approaches. Our aim were, using an observational approach based on estimates of the mass balance between the input and the debris stock during 3 years. For that, we assess, in 41 plots in a restinga forest fragment, the litterfall, soil litter, taxonomic, functional and phylogenetic litter diversity, C:P and C:K ratios and water-holding capacity of litter, in addition to the soil moisture and N, P and K concentrations. After building 54 models of path analysis, our significant models showed that soil moisture was the only variable to affect the decomposition rate of litter in our communities. The results suggest that the decomposition of the litter is not driven by any of the possible effects of diversity: neither by mechanisms of selection nor of complementarity. In fact, at our study site, the results indicate that the decomposition of plant debris is affected by physical attributes of the environment, i.e. soil moisture, probably because it affects the activity of the decomposing microorganisms.


BANKING MEMBERS:
Presidente - 1714892 - ADRIANO CALIMAN FERREIRA DA SILVA
Interna - 1677189 - GISLENE MARIA DA SILVA GANADE
Externo à Instituição - ALAN MOSELE TONIN - UnB
Notícia cadastrada em: 16/06/2020 14:48
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