Na região costeira do Rio Grande do Sul os impactos causados pelo cultivo e dispersão do Pinus estão cada vez mais evidentes. Na região do Parque Nacional da Lagoa do Peixe extensas áreas de cultivo de Pinus alteraram a estrutura e a dinâmica da paisagem local. O entorno da Unidade está cercado e dentro as áreas de cultivo representam uma forte ameaça. O vento distribui as sementes, que vêm de toda parte, dificultando o manejo e a proteção do sistema. O efeito espacial do Pinus é intenso e as alterações mais severas podem ser observadas na margem da Lagoa do Peixe, junto ao campo de dunas, na faixa longitudinal de Pinus, paralela ao oceano. Nessa faixa o deslocamento natural das dunas parece ter sido modificado, acumulando areia, que aos poucos está superando o obstáculo e talvez seja uma questão de tempo até que alcancem um volume perigoso, capaz de invadir a lagoa. A exclusão do Pinus, aos poucos, vem sendo realizada, porém sem um plano estratégico de erradicação e sem considerar, também, a necessidade de restaurar a paisagem e reabilitar os processos naturais, perdidos na decomposição do desenho espacial original.Abstract:The impacts caused by the cultivation and dispersion of pines are increasingly evident in the coastal region of Rio Grande do Sul. Currently, the region of Lagoa do Peixe National Park has been affected by extensive pine cultivation areas that changed local landscape structure and dynamics. Not only pines surround the area but also remaining cultives inside the unit represent a threat. The wind distributes the seeds, which makes management and system protection a complicated matter. The pines spatial effect is intense and the most severe changes may be observed at the margin of the pond, next to the dunes, in the pines longitudinal range, parallel to the ocean. In this area, the dune natural movement appears to have been modified, settling the once drifting sand, which is slowly overcoming the obstacles. Maybe it is a matter of time until it reaches a dangerous volume, able to overrun the lagoon. The exclusion of pines gradually have been performed. However, it is urgent to develop a strategic plan of eradication and to consider the need to restore the landscape therefore rehabilitating natural processes lost in the decomposition of the original spatial design.Keywords: Cultivationof Pinus; CoastalLandscapes; Coast of Rio Grande do Sul.
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