Wykorzystanie chmur punktów Lidar w ochronie czynnej borów chrobotkowych w Parku Narodowym" Bory Tucholskie"

Forest lichen communities develop on dry and poor in biogens sandy areas. The center of occurrence of this plant community in Europe coincides with Natura 2000 sites located in Poland, including the Bory Tucholskie National Park (BT NP). The aim of the study was to determine the spatial structure of selected Scots pine stands of BT NP, where a program of active protection of lichen communities was initiated. The research area included two forest compartments: 18 and 19. The analysis was performed in the following sub-compartments: 18c, 19d, 19g, 19h, 19i, 19j and 19 k. The research was carried out using airborne (ALS) and terrestrial (TLS) laser scanning (LiDAR). Thanks to the use of LiDAR technology, it was possible to make a very precise description of the structure of stands in 2D and 3D space. As a result of the conducted study, a number of stand parameters have been defined, such as: number of trees, tree density in the stand, number of live trees, average distance between living trees, number of dead trees, basal area, horizontal cover of tree crowns, crown penetration ratio, average height of trees, height of the crown base, tree crown length, crown layer volume, 2D and 3D crown surface, average crown radius, canopy relief ration and vertical range of dead branches. A map of crown gaps with an area of more than 2 m2 was also developed. Research activities with the use of laser scanning technology is continued in 2018 (repeated ALS and TLS scanning). The conducted research will allow to determine the influence of the stand structure on factors influencing the occurrence of lichens, including: shaping of microclimatic conditions.