Synthesising knowledge on carbon stocks is an essential tool for understanding the potential of forests to store carbon and its drivers. However, such a synthesis needs to be constructed for the Atlantic Forest due to various methodological approaches and biogeographic heterogeneity. Thus, here we conducted a bibliographic search (2000 to 2021) on carbon stocks in the biomass and necromass of Atlantic Forest ecosystems to understand the variation in stocks and their explanatory variables. Drivers included spatial (altitude, forest size) and climatic (precipitation and temperature) variables, and successional stages. Based on the information in 46 articles, biomass exhibited the highest carbon stock (96%), in Mature Forests (MF), with an average of 125.34±40.3 MgC.ha^-1, whereas Secondary Forests (SF) stored 82.7±38.2 MgC.ha^-1. The carbon in the necromass varied from 1.63 to 11.47 MgC.ha^-1, with SF exhibiting 3.90±2.73 MgC.ha^-1 and MF 4.31±2.82 MgC.ha^-1. Only average annual precipitation and successional stage positively explained the carbon in Atlantic Forest. This research clarifies the function and potential of Atlantic Forest fragments for storing carbon and reinforces need for conserving mature forest patches throughout the biome since one hectare of mature forest can store almost twice as much carbon as one hectare of secondary young patches.

The use of diameter at breast height (DBH) measurement in allometric equations for estimation of biomass (AGB) requires that measurements be taken precisely at 130cm from the ground level. However, obtaining this measurement is not always possible. This study aimed to i) investigate the relationship between the DBH and diameters measured at different heights below 130 cm on tree stems, ii) develop an equation for converting diameters measured below 130cm to DBH, and iii) evaluate the accuracy of using converted DBH values to estimate the AGB. We measured the diameters of 376 trees at various stem heights at intervals of 25 cm up to the DBH, in a protected area of the Atlantic Forest, Brazil. Three theoretical models were applied and tested, and the best equation was selected. The relationships between DBH and diameters at 50, 75, and 100 cm did not differ, which allowed the use of one general equation for converting these diameters to DBH. Measurements taken below 50 cm may lead to biased estimations; thus, we propose two additional equations for estimating DBH from these heights. The DBH converted from diameters measured at other heights can be accurately used to estimate the tree AGB and carbon stocks.

A pressão sobre os recursos naturais para fins de atividades agropecuárias tem causado alterações e perdas de serviços ecossistêmicos essenciais ao bem-estar das populações. Objetivou-se avaliar a influência do desmatamento sob as alterações climáticas em áreas de exploração agropecuária do município de Currais-PI. Realizou-se uma análise espaço-temporal do uso e cobertura do solo no município, numa serie temporal de 32 anos (1986 a 2018), correlacionando com variáveis meteorológicas. Para realizar a análise espaço-temporal foram utilizadas imagens do Satélite Landsat 5 e Landsat 8, adquiridas gratuitamente no Instituto Nacional de Pesquisas Espaciais (INPE) entre os meses de junho e outubro. Os dados meteorológicos (temperatura máxima média, umidade relativa e precipitação total) foram obtidos no site do Instituto Nacional de Meteorologia (INMET). No período de estudo houve um decréscimo de 15,90% da vegetação nativa, e simultaneamente ocorreram alterações no microclima, com aumento de 2,06°C na temperatura e diminuição de 25% da umidade relativa. A progressiva pressão sobre a vegetação nativa para uso e ocupação do solo causou rápidas alterações na paisagem natural e no microclima da região.

El trabajo tuvo como objetivo evaluar la sensibilidad del método del ultrasonido en la determinación del grado de sanidad de las piezas estructurales en madera que compone la fachada de la casa grande de la Hacienda Cachoeira do Taepe, Surubim, Pernambuco, Brasil. Se evaluaron siete pilares y cada pieza fueron marcados puntos a partir de la base cada 30 centímetros en el sentido longitudinal y midió el tiempo de propagación de la onda en cada punto marcado. El pilar uno, presentó lecturas con valores inferiores a 1000 m/s, mereciendo atención en la parte inferior y central de la pieza, necesitando reparaciones puntuales. En el pilar cinco se verificaron valores superiores a 2000 m/s casi en toda la extensión de la pieza. Los resultados apuntaron a la sensibilidad del método del ultrasonido en la evaluación del grado de degradación y comprometimiento de las piezas de madera utilizadas en estructuras y la consiguiente toma de decisión en cuanto a la restauración de la edificación, tomada por el Instituto del Patrimonio Histórico y Artístico Nacional (IPHAN).

The objective was to analyze the forest landscape structure of fragments at different altitudes in dry region. In order to do so, RapidEye images acquired in the year of 2014 were segmented, identified the Forest and Other uses classes and classified. Categorical maps were made and inserted in raster format in the Fragstats software, and text files were generated for calculations of class-level metrics and landscape-wide and then analyzed. The results of the parameters determined that the most affected and fragmented environments are those with lower altitudes, because of the forest cover of these environments is under strong pressure, since they are surrounded mainly by the Agropecuarian class, providing more susceptibility to fragmentation and external influences. Therefore, using the metrics together it was verified that there is a high shredding and this shredding has relation with the altitudinal gradient, since the lower the altitude, the lower the connectivity and thus the lower forest cover.