Banca de DEFESA: EDSON SERAFIM DE ALMEIDA JUNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : EDSON SERAFIM DE ALMEIDA JUNIOR
DATA : 10/02/2021
HORA: 15:00
LOCAL: virtual
TÍTULO:

FOLIAR ORGANIC MATTER productivity in an atlantic rain florest stream. 

PALAVRAS-CHAVES:

Riparian zones; headstreams; allochthonous organic matter

PÁGINAS: 54
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
SUBÁREA: Ecologia de Ecossistemas
RESUMO:

Riparian zones are considered ecotone and leaves provided by riparian vegetation are the main source of energy for headwater streams. The carbono cycling and nutrients in these streams depend on organic matter input (OM) determined by riparian vegetation  The plants lose their leaves over time according to the phenology of the species. The precipitation and temperature are identified as the main drivers of this process. The aim of this work was to evaluate the allochthonous MO inputs and the main species of plants that contribute to the input of MO over time (five years 2015-2019) in a stream of the Atlantic Forest. Buckets, suspended nets and nets on the ground were used to collect the vertical, terrestrial and lateral inputs of the allochthonous OM contribution. For the benthic stock, dragging with surber was done at the bottom of the stream. Collections were made quarterly over the years to obtain seasonal representativeness. The years of 2015 and 2016 differed from the others. The first quarters of the years were aggravated due to the drought. The lateral inputs had the highest contribution of OM and the vertical inputs the lowest. The temperature positively influenced the input of OM while precipitation contributed negatively to the leaves inputs. The species that most contributed to the input of OM were: Miconia dodecandra, Brosimum guianense, Miconia mirabilis, Adenocalyma coriaceum, Bauhinia cheillantha, Stryphnodendorn pulcherrimum and Pera glabrata. These species are common in riparian zones and can be studied in the future as potential for plans to recover degraded areas. Long-term studies prove to be important for a better dynamic understanding of OM in headwater streams.

MEMBROS DA BANCA:
Interno(a) - 1658906 - ADRIANA OLIVEIRA MEDEIROS
Interno(a) - 1739395 - EDUARDO MARIANO NETO
Externo(a) à Instituição - RENATO TAVARES MARTINS - INPA