Dinâmica da colonização natural em encostas degradadas da Serra do Mar, ecofisiologia e produção de mudas das espécies, como subsídio à recuperação florestal

Content Provider	Semantic Scholar
Author	Júnior, Santos Dos, Nelson Augusto
Copyright Year	2005
Abstract	The occurrence of landslides on the Serra do Mar is an inherent process to the local dynamics. However, due to anthropic action and its consequences, this event has become more frequent and reached greater proportions. The objective of this study was to check, through floristic and phytosociological studies, which vegetable species that colonize the degraded mountainous slopes in the region of Cubatao/SP and, after studying their biology, propose recovery strategies for these areas. For this, three areas were experimentally chosen as a means of establishing a gradient in terms of distance from Polo Industrial de Cubatao (Cubatao Industrial Hub), vegetation and relief. Samples of soil were collected from these areas, both from the degraded areas as well as from the remaining non-degraded surrounding ones as a means to characterize the physical environment. Parcels of one m of soil, with the phytosociological parameters of the species present at the time of the implementation of the study annotated were placed there. The natural colonization was then checked every month, during a year, after cleaning. The most outstanding species (Tibouchina clavata, Lycopodiella cernua, Blechnum serrulatum, Cecropia pachystachya e Stycherus bifidus) underwent tests in laboratory conditions and nurseries. Mantles composed of degradable vegetable matter as a means of mechanical deterrence to landslides were used as an alternative to the recovery of the areas. The three experiment areas presented low specific diversity, with many exotic species native or non-native of the region. Throughout the experiment period 35 species were identified being the Poaceae and the Asteraceae families the most representative. However, the only species present in each and every period and area and also in large quantities was the Tibouchina clavata. The soils presented low fertility even under natural circumstances and were extremely poor after the landslides. The 5 species that were tested (2 fanerogames and 3 pteridophytes) showed viability in terms of seedling production and responded well to the treatments to which they were submitted. As for the use of the mantle, besides propitiating the retention of the superficial erosion process it also helped to promote an increase in the number of species and in the quantity of individuals within each species when compared to the barren area, which showed the viability of the use of this technique in the recovery of degraded slopes.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://repositorio.unesp.br/bitstream/handle/11449/100653/santosjunior_na_dr_rcla.pdf?isAllowed=y&sequence=1
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article