Full text
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| Author(s): |
Claudiney Bardini Junior
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Piracicaba. |
| Institution: | Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) |
| Defense date: | 2012-12-20 |
| Examining board members: |
Jaime Aparecido Bertoluci;
Sergius Gandolfi
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| Advisor: | Jaime Aparecido Bertoluci |
| Abstract | |
It is estimated that currently 80% of the remaining Atlantic forest are located on private properties, which makes evident the need for conservation of these areas by engaged entities. Evaluation and monitoring of restored forests are essential to improve restoration techniques, thereby contributing to the maintenance and persistence of biodiversity in these areas. The present study aimed to evaluate the influence of time of forest restoration in areas planted with native tree species and their structural characteristics on the richness and abundance of leaf litter frogs. The data set of this study was obtained between April 2011 and February 2012, on 5 × 5 m plots arranged in 12 fragments located in three areas of native vegetation and a chronosequence (five months, and four and 11 years old) of areas restored with native species, totaling three fragments by age. Four sampling stations with six sampling units were installed in each fragment, totaling 288 plots of sampling effort. In addition to counting the frogs in each plot the following abiotic variables were measured: temperature and relative humidity of the air trapped in the litter, litter depth and cover canopy. Five anuran species belonging to five families were recorded. The highest species richness and abundance were obtained in forested fragments with 11 years old, followed by the native forest area and the fragment with five months old. No individual was captured at the four years old area. The Spearman correlation analysis indicated that anuran richness was significantly correlated with the depth of leaf litter and canopy cover. Canopy cover and litter depth were positively correlated, and relative humidity and temperature of the air were negatively correlated. The Kruskal-Wallis test indicated a significant difference among different types of fragments evaluated. The Wilcoxon test revealed that five old months and four years old fragments did not differ, but they were significantly different from 11 years old and native forest fragments. It should be noted, however, the need for medium and long term studies to improve our understanding about processes involved in ecological succession and occupation of these habitats by anurans. (AU) | |
| FAPESP's process: | 10/04542-4 - Richness and abundance of litter frogs in regeneration forest of the state of Sao Paulo |
| Grantee: | Claudiney Bardini Junior |
| Support Opportunities: | Scholarships in Brazil - Master |