Influência das diferentes classes fitossanitárias na estimativa do estoque de carbono em Araucaria angustifolia (Bertol.) O. Kuntze de um remanescente florestal em Dois Vizinhos – PR

Abstract

Araucaria angustifolia (Bertol.) Kuntze is a key species for maintaining biodiversity and carbon sequestration in southern Brazilian ecosystems, but it is endangered, requiring phytosanitary management and conservation strategies based on technical diagnosis. Environmental characterization and carbon stock estimation are fundamental to understanding the dynamics of these forest remnants and supporting climate change mitigation actions. Advances in geotechnologies have increased the accuracy of carbon monitoring and spatial mapping, contributing to the identification of priority areas for management. Thus, this study evaluated the phytosanitary status of A. angustifolia individuals classified into three categories (healthy, devitalized, and dead), estimated carbon stocks using allometric equations, and developed an interpolated map to represent the spatial distribution of carbon in the analyzed remnant. The results indicated that healthy trees had greater carbon accumulation, while devitalized individuals showed significant reductions and dead trees completely lost their sequestration potential, potentially releasing carbon during decomposition. Spatial analysis revealed variations in the carbon distribution pattern, pointing to vulnerable areas and strategic regions for conservation management. It was concluded that phytosanitary conditions directly affect carbon storage and sequestration by araucaria trees, reinforcing the need for integrated management aimed at maintaining the vitality of individuals and the resilience of remnants. The results highlight the ecological importance of the species and its relevance in the context of climate change mitigation.