Banca de DEFESA: URSULA TATHIANA OLIVEIRA DE MEDEIROS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : URSULA TATHIANA OLIVEIRA DE MEDEIROS
DATE: 29/02/2024
TIME: 12:30
LOCAL: Google Meet
TITLE:

Forest carbon sequestration for different ecological restoration techniques in the Caatinga

KEY WORDS:

Biomass; Caatinga; Carbon; Ecological restoration;

PAGES: 42
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Ecological restoration plays a crucial role in overcoming the urgent challenges related to ecosystem degradation, biodiversity loss and climate change. In regions such as the Caatinga, which faces unique climatic challenges, restoration can be an ally as a technique to promote carbon sequestration in degraded areas, strengthening the potential for climate change mitigation. This study seeks to identify effective restoration techniques and assess their impact on carbon accumulation, tree species development and seedling characteristics, with the aim of optimizing biomass production in semi-arid ecosystems. The research involved six tree species native to the Caatinga and implemented five planting treatments in 12m x 8m plots with 2m spacing, replicated five times. These treatments included the control (no manipulation), irrigation, transposition of litter, a combination of transposition of litter and irrigation, and agroforestry. The seedlings were categorized based on the dimensions of the roots (small or large) and the aerial part (small or large), and measurements of height, diameter at ground height, aerial biomass and water content of the plants were recorded three years after restoration, at the end of the experiment. Our results revealed that the addition of water had a significant impact on carbon accumulation. Jurema preta (Mimosa tenuiflora) proved to be the most promising species for greenhouse gas neutralization projects, accumulating approximately 0.09 kg of carbon per m². The research also looked at the importance of the size of the seedlings, indicating that plants with larger roots and aerial parts accumulated more biomass and had a higher survival rate. In addition, the Catingueira species showed excellent survival in water-restricted treatments, especially when the seedlings had small roots. The total carbon accumulated at the end of the experiment was 0.1 kg per m². These findings offer guidelines and strategies for management and restoration, highlighting the importance of taking into account not only the availability of water, but also the particularities of the species and the size of the seedlings in order to maximize the effectiveness of restoration projects in the Caatinga.

COMMITTEE MEMBERS:
Presidente - 1677189 - GISLENE MARIA DA SILVA GANADE
Externo ao Programa - 3334238 - FELIPE FERREIRA MONTEIRO - UFRNExterna à Instituição - JEANNE RAQUEL DE ANDRADE FRANCO