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CAC-PPGCA PROGRAMA DE PÓS-GRADUAÇÃO STRICTO SENSU EM CIÊNCIAS AMBIENTAIS - CAC UNIVERSIDADE DO ESTADO DE MATO GROSSO "CARLOS ALBERTO REYES MALDONADO" Phone: No available http://portal.unemat.br/PPGCA

Banca de QUALIFICAÇÃO: VALERIA LUCELIA DE OLIVEIRA CORREA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : VALERIA LUCELIA DE OLIVEIRA CORREA
DATA : 29/12/2021
HORA: 09:00
LOCAL: ENSINO REMOTO EMERGENCIAL
TÍTULO:

Underground carbon dynamics in the Cerrado stricto sensu of the Ecological Stationof Serra das Araras, under different fire histories

PALAVRAS-CHAVES:

soil breathing; burn; carbon dioxide.

PÁGINAS: 31
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

The soil is one of the largest carbon reservoirs in the ecosystem, knowing its dynamics, as well as quantifying the efflux of CO2 into the atmosphere, allows not only to carry out carbon sequestration calculations for that ecosystem, but also helps in decision making in an attempt to mitigate the high concentrations of this gas in the atmosphere, since after the occurrence of burning, emissions tend to increase due to the accumulated carbon. The objective of this study was to analyze the variation of the efflux of CO2 from the soil in areas with different fire histories in the Serra das Araras Ecological Station, in Porto Estrela-MT, in order to provide evidence about this important process in Cerrado areas. The study areas were subjected to experimental burning in 2018 and/or 2019 (two burnt areas per year) and maintained after these events, in a process of natural regeneration. The efflux was measured monthly between September 2018 and March 2020, with the aid of a portable infrared gas analyzer, coupled to a retention chamber (EGM-4). The experimental design consisted of measuring the CO2 efflux in 54 breathing collars, distributed among the six sampled areas, with three experimental areas parallel to three control areas. In each sampled area, a total of nine breathing collars were inserted, each allocated one of the nine central sub-plots. We measured the efflux of CO2 and recorded the seasonal variation in CO2 emissions between periods of drought and rain, pre and post experimental burning, with a climatic seasonality that influences the soil respiration process, and moisture is one of the major factors influence. The values presented did not follow the same seasonality in all areas, although in the first six months after the burning, we registered higher CO2 emissions resulting from underground respiration in the areas subjected to experimental burning. During the period studied, the efflux of CO2 from the soil was higher in the experimental areas compared to the control areas.

MEMBROS DA BANCA:
Interno - 82328001 - BEATRIZ SCHWANTES MARIMON
Presidente - 000.000.000-00 - IMMACULADA OLIVERAS MENOR - York
Externo ao Programa - 986.188.651-68 - SIMONE MATIAS DE ALMEIDA REIS - UNEMAT

Notícia cadastrada em: 29/11/2021 18:11