Change in volume, biomass and carbon of the stem in a Seasonal Semideciduous Forest of the Atlantic Forest
Name: LUCAS DUARTE CALDAS DA SILVA
Publication date: 30/04/2020
Advisor:
Name |
Role |
|---|---|
| ADRIANO RIBEIRO DE MENDONÇA | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| ADRIANO RIBEIRO DE MENDONÇA | Advisor * |
| GILSON FERNANDES DA SILVA | Co advisor * |
Summary: Studies on changes in forests can assess the behavior of species during growth, mortality and ingrowth, as well as changes that occur in the wood volume, biomass and carbon stocks of the forest over a certain period of time. The quantification of these processes helps us to better understand the functioning of trees and forests and their role in providing ecosystem services such as capture and storage of atmospheric carbon, as well as the response of these environments to climate change. In this context, the information derived from these studies, provides subsidies for the formulation of public policies and actions of the private initiative, which aims at the conservation of natural resources, recovery of degraded areas and mitigation of the impacts resulting from anthropic actions. This study aimed to evaluate the changes in the volume, biomass and carbon stocks of the tree stem in a Submontane Semideciduous Seasonal Forest, located in the south of the State of Espírito Santo. The analyzes were performed using data from continuous inventories, collected in 25 permanent plots of 20x50m, in the years 2007 and 2017. Initially, the characterization of the floristic composition was made. Subsequently, the phytosociological analysis of the forest was carried out. Equations were fitted to estimate the volume, biomass and carbon of the tree stem depending on the diameter, height of the trees and basic wood density. To obtain the data for the fitting of these equations, 21 species were considered, representing approximately 50% of the importance value index (IVI). Ten trees per species were selected and scaled upright. Samples of wood were also collected from five trees per species, using Pressler augers, to obtain the basic wood density and the carbon content (TC) of the species. The TC was determined by means of a composed sample by species. With the inventory data, allometric equations, basic density and carbon content, the volumetric, biomass and carbon stock estimation was performed, as well as the quantification of ingrowth, mortality, gross and net increments. The volumetric, biomass and carbon stock was 238,35 m³ ha-1, 172,01 Mg ha-1 and 74,98 Mg ha-1, respectively, for the year 2007 and 259,73 m³ ha-1, 188,14 Mg.ha-1 and 83,36 Mg ha-1, respectively, for the year 2017. The ingrowth rates for the 10-years period in volume, biomass and carbon were 2.47%, 2.44% and 3.47%, respectively, while mortality rates were 12.87%, 12.99 % and 12.49%, respectively. The annual net periodic increase, including ingrowth, for the variables volume, biomass and carbon, corresponded to 2.14 m³ ha-1 year -1, 1.61 Mg ha-1 year -1 and 0.84 Mg ha-1 year -1. The species with the highest carbon stock in the bole were Astronium concinnum, Pseudopiptadenia contorta, Anadenathera peregrina, Melicoccus oliviformis subsp. Intermedius, Goniorrhachis marginata and Astronium graveolens. It is concluded that, despite being a forest in an advanced successional stage, the increase in stocks of volume, biomass and mainly carbon indicates that the RPPN Fazenda Boa Esperança acted as a carbon drain in the period between 2007 and 2017.
Keywords: forest inventory, Submontane Semideciduous Seasonal Forest, native forest species, regression models, biodiversity conservation.
