Author(s): Denise Zanchetta | Leandro de Souza Pinheiro
Journal: CLIMEP : Climatologia e Estudos da Paisagem
ISSN 1980-654X
Volume: 2;
Issue: 1;
Start page: 72;
Date: 2007;
Original page
Keywords: Pinus elliottii | Biological invasion | Cerrado | Managing practices | Landscape ecology.
ABSTRACT
One of the biggest problems concerning the biological contamination in the South hemisphere isrelated to the invasion of natural ecosystems by Pinus species. This work has focused in the studyof the biological contamination by Pinus elliottii in the natural vegetation of the Itirapina EcologicalStation - SP. In this Conservation Unit the grasslands and savannas are suffering with the invasionof Pinus from the exotic forest crops of the contiguous areas of Experimental Station. The localclimatic dynamics favor the dissemination of the P. elliottii since the period of dispersion of it’s seeds, which occurs between March and May, coincides with a period of great bearing of the windsin the direction where the invasion occurs (North, Northeast and Southeast). As this periodcoincides with the end of the rainy season and the beginning of dry season, the favorable directionand the high intensity of the winds facilitate the displacement of the seeds. In view of thecomplexity of the situation there is no ideal solution for the problem and it’s extremely important toadopt managing practices that restore and preserve the scenic and ecological attributes of theregion. We concluded that the best strategy to remedy the invasions is to establish a recoveryzone with native species in the region between the two Conservation Units according to thepedologic and phisiographic conditions. Such barrier, therefore, should not offer risks for theintegrity of the natural ecosystems. This zone should work as an ecological corridor binding thenatural areas of the Ecological Station with the fragments of Cerrado that still remain in theExperimental Station as well. The implementation of such zone with dense vegetation shouldfunction as a filter to the dispersion of the P. elliottii seeds.
Journal: CLIMEP : Climatologia e Estudos da Paisagem
ISSN 1980-654X
Volume: 2;
Issue: 1;
Start page: 72;
Date: 2007;
Original page
Keywords: Pinus elliottii | Biological invasion | Cerrado | Managing practices | Landscape ecology.
ABSTRACT
One of the biggest problems concerning the biological contamination in the South hemisphere isrelated to the invasion of natural ecosystems by Pinus species. This work has focused in the studyof the biological contamination by Pinus elliottii in the natural vegetation of the Itirapina EcologicalStation - SP. In this Conservation Unit the grasslands and savannas are suffering with the invasionof Pinus from the exotic forest crops of the contiguous areas of Experimental Station. The localclimatic dynamics favor the dissemination of the P. elliottii since the period of dispersion of it’s seeds, which occurs between March and May, coincides with a period of great bearing of the windsin the direction where the invasion occurs (North, Northeast and Southeast). As this periodcoincides with the end of the rainy season and the beginning of dry season, the favorable directionand the high intensity of the winds facilitate the displacement of the seeds. In view of thecomplexity of the situation there is no ideal solution for the problem and it’s extremely important toadopt managing practices that restore and preserve the scenic and ecological attributes of theregion. We concluded that the best strategy to remedy the invasions is to establish a recoveryzone with native species in the region between the two Conservation Units according to thepedologic and phisiographic conditions. Such barrier, therefore, should not offer risks for theintegrity of the natural ecosystems. This zone should work as an ecological corridor binding thenatural areas of the Ecological Station with the fragments of Cerrado that still remain in theExperimental Station as well. The implementation of such zone with dense vegetation shouldfunction as a filter to the dispersion of the P. elliottii seeds.
