Estoque De Carbono Em Áreas De Restauração Florestal Da Mata Atlântica

Abstract

ResumoEcossistemas florestais são importantes no processo de estocagem de carbono da atmosfera. Áreas de reflorestamentos podem contribuir de maneira substancial nesse processo e diminuir a pressão extrativista sobre florestas nativas. Este trabalho objetivou avaliar a biomassa acima do solo viva (por meio do método não-destrutivo -equações alométricas) e morta (serapilheira) e o estoque de carbono nesses compartimentos em áreas de reflorestamento com diferentes idades (3, 5 e 7 anos) e em área de Floresta Ombrófila Densa (testemunha), localizadas no município de Cachoeiras de Macacu (RJ). Foram alocadas 30 parcelas (10 x 10 m cada) na área testemunha e 20 parcelas (20 x 30 m cada) nas áreas de reflorestamento. Os indivíduos arbóreos foram identificados, e a altura total, circunferência e diâmetro à altura do peito foram medidos. A serapilheira foi coletada com gabarito quadrado (1 x 1 m) em cinco repetições em cada área. Os valores de biomassa acima do solo e carbono estocado aumentaram à medida que a idade dos plantios de restauração florestal avançou. Os modelos alométricos utilizados foram adequados no estudo. Contudo, é necessário testar a confiabilidade dos dados com a utilização do método destrutivo nas áreas reflorestadas. Palavras-chave: Sequestro de carbono, restauração florestal, biomassa acima do solo, serapilheira. AbstractCarbon stock in forest restoration areas of the Atlantic Forest. Forest ecosystems are important in the process of storing carbon from the atmosphere. Reforestation areas can contribute substantially in this process and reduce the extractive pressure over native forests. This study aimed to assess the aboveground live biomass (by non-destructive method -allometric equations) and dead biomass (litter layer standing stock) and carbon stock in these compartments at areas of reforestation of different ages (3, 5, and 7 years old) and at a Dense Ombrophylous Forest (control) area, located in the municipality of Cachoeiras de Macacu (state of Rio de Janeiro, Brazil). We allocated 30 plots (10 x 10 m each) in the control area and 20 plots (20 x 30 m each) in the reforestation areas. Tree individuals were identified, and total height, circumference, and diameter at breast height were measured. The litter standing stock was collected by square gauge (1 x 1 m) in five replicates at each area. The values of aboveground biomass and stored carbon increased as the age of forest restoration plantings advanced. The allometric models used were adequate in the study. However, it is necessary to test the reliability of the data, using the destructive method in the reforested areas.

Population Fluctuation of Termitofauna (Blattodea: Isoptera) in Six Forest Fragments of the Mata Atlântica

“…According to Köppen, the climate of the region is tropical with a rainy summer and a dry winter, classified as type AF. The work developed by Azevedo et al (2018) on the same reservation determined the average annual temperature of 22.4 °C, with maximum in the months of January and February and minimum in June. The average annual rainfall is 2095 mm.…”

“…In the state of Rio de Janeiro, forest restoration actions are carried out in the basin of Guapiaçu river in Cachoeiras de Macacu (Azevedo et al, 2018). The headwaters of the river is located in a preserved area at 1,200 m altitude in the midst of the hilly slopes of the Serra do Mar (Azevedo et al, 2018).…”

“…In the state of Rio de Janeiro, forest restoration actions are carried out in the basin of Guapiaçu river in Cachoeiras de Macacu (Azevedo et al, 2018). The headwaters of the river is located in a preserved area at 1,200 m altitude in the midst of the hilly slopes of the Serra do Mar (Azevedo et al, 2018). The basin has a territorial extension of 573.54 km 2 , having as main soil covered with Dense Ombrophilous Forest (Azevedo et al, 2018), very diverse, forming three strata: emerging with canopy trees, reaching about 45 m of height, on the main canopy of 5 to 10 m and smaller trees their shadows (Azevedo et al, 2018).…”

“…The main river of the basin, the river Guapiaçu, used to be navigable. According to Azevedo et al (2018), the rivers of the region were important logistical pathways of agricultural products and raw materials derived from forest extraction in the 18th century. Currently, a large part of restoration actions of the basin follows the guidelines of the Atlantic Forest Restoration Pact (Calmon et al, 2009).…”

EXTRAÇÃO DE LIPÍDEOS DA MICROALGA Nannochloropsis oculata CULTIVADA COM VARIAÇÃO DE NITRATO DE SÓDIO NO MEIO DE CULTURA

“…Universidade Federal de Lavras Lavras -Minas Gerais. (AZEVEDO et al, 2018;FERREIRA et al, 2018) junho e julho de 2016 e teve como objetivo verificar a percepção sobre remanescentes florestais pela visão de discentes de onze colégios estaduais do município de Irati (PR.…”