Banca de DEFESA: ARNOLD PATRICK DE MESQUITA MAIA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ARNOLD PATRICK DE MESQUITA MAIA
DATE: 29/03/2023
TIME: 09:00
LOCAL: videoconferência
TITLE:

THE IMPACT OF MICROCLIMATE CHANGES ON THE STRUCTURE AND FLORISTIC OF THE PLANTS COMMUNITY IN THE UNDERSTORY OF THE UPLAND FOREST IN THE EASTERN AMAZON

KEY WORDS:

Amazonia, flora e climate changes

PAGES: 63
BIG AREA: Ciências Biológicas
AREA: Botânica
SUMMARY:

Global climate change is impacting biodiversity. In order to monitor these changes and their impacts, an experiment was created in 2001 in the Amazon, in the state of Pará, which simulates an artificial reduction in precipitation called “Dry Forest Project” (ESECAFLOR). Monitoring started in 2001 and continues today. The structure of ESECAFLOR is represented by two parcels. One called witness and the other experimental, where 50% of precipitation is excluded. The general objective of this dissertation is to compare the structure and floristics of plants in the understory of a terra firme forest between the control and experimental plots of the ESECAFLOR Project. Surveys took place in 2017 (epiphytes and hemi-epiphytes and understory palms) and 2022 (recruitment of plants with a diameter of 1-9.9 cm). There was a decrease in soil moisture and an increase in soil temperature between the experimental plot compared to the control plot in the years 2017 and 2022, respectively. There was a decrease in the abundance of individuals and in the number of epiphyte and hemi-epiphyte species in the experimental plot compared to the control plot. There was a reduction in the abundance and height of individuals and in the number of palm species in the experimental plot compared to the control plot. The vast majority of individuals in the recruitment have an arboreal life form, followed by lianas, shrubs and palm trees. Tree and shrub life forms had a significant reductio in the abundance of individuals and the number of species between the control and experimental plots, while the opposite occurred with plants with lianas and palms life forms. There was a separation of species composition of plant recruitment between the control and experimental plot, both at the community level and for tree and shrub life forms. These results are worrying, because in climate change scenarios, which predict a reduction in rainfall in the Amazon Biome, there are predictions of a decrease in the abundance of individuals and species and also changes in the composition of species of understory plants that are not very tolerant to changes microclimates.

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