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trabalhos:abstracts [2021/12/08 01:21] jennifervasconcelosjdsv2 |
trabalhos:abstracts [2021/12/08 01:28] jennifervasconcelosjdsv2 |
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a secondary role by determining local differences in the phylogenetic structure of | a secondary role by determining local differences in the phylogenetic structure of | ||
neighbouring species. | neighbouring species. | ||
+ | |||
+ | === MORETTO, Felipe Alexandre === | ||
+ | |||
+ | **Natural regeneration and seedling diversity in a coastal plain transition ecosystem - hillside** | ||
+ | |||
+ | **Abstract:** The seedling community of coastal plains of Caraguatatuba county was studied in a | ||
+ | fragment of 50 acres of Forest Transition Restinga - Hill. The study area has been | ||
+ | described by means of 40 sets of three plots of 1m x1m totaling an area of 120m2, | ||
+ | with 23 sets were flooded condition and 17 in non-flooded conditions (drought). We | ||
+ | obtained canopy opening with the help of Densiometer. In total 507 seedlings were | ||
+ | identified, representing an average of 4.23 seedlings per m2. It was possible to | ||
+ | observe a high richness, with 82 different species. The most abundant species were | ||
+ | //Calypthrantes sp// (107), //Myrta sp1// (82) and //Annona cf reticulata cf// (19). The family | ||
+ | Myrtaceae showed the highest species richness, totaling 18 species. The flooded | ||
+ | plots had on average 9.99 seedlings per 3m 2 and droughts 15.69 per 3m 2. The | ||
+ | average number of species in the wetlands was 3.69 species per 3m 2 and in the dry | ||
+ | plots was 6.11 seedlings per 3m 2. The predictions of this study were that the | ||
+ | wetlands should contain fewer species and lower species richness compared to | ||
+ | areas not flooded. For canopy opening was expected that more open areas possess | ||
+ | greater number of seedlings and greater species richness. However after | ||
+ | randomization of data was not possible to observe that wetlands had less wealth and | ||
+ | fewer species (p = .33). Increasing the percentage of canopy openness did not | ||
+ | significantly affect the number of seedlings (p = 0.23) or species richness (p = .44). | ||
+ | Thus, the results indicate that environmental variables are not sufficient to explain the | ||
+ | observed variation in abundance and species richness of seedlings in this | ||
+ | ecosystem. However other factors may be limiting for seedling establishment. Among | ||
+ | the possible factors, the human disturbance area for removal of palm (Euterpe | ||
+ | edulis), the large number of paths traced in the region (trampling seedlings) and | ||
+ | competition from herbaceous plants deserve more detailed studies in the future. | ||
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=== DIAS, Julia de Freitas === | === DIAS, Julia de Freitas === |