ORCID Profile
0000-0003-0536-1668
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Publisher: Springer Science and Business Media LLC
Date: 03-07-2015
Publisher: Wiley
Date: 07-2021
DOI: 10.1111/AVSC.12602
Abstract: Germination is one of the decisive processes influencing species presence and plant community structure. Here, we investigated the influence of seed density and single and mixed species on germination percentage and timing using annual wetland plants of the Pantanal in Brazil. Seeds were collected from annual species occupying a seasonally flooded grassland, at Fazenda São Bento (19°29′27,3″ S 57°01′55,9″ W), in the Abobral sub‐region, Pantanal, Mato Grosso do Sul (Central‐West Brazil). Experiments on the effects of seed density dependence on the germination time in intraspecific (single‐species) and interspecific (mixed‐species) treatments were conducted with ten annual species at three levels: for intraspecific — scarce (one seed), moderate (10 seeds), and high (20 seeds) and for interspecific — low (one each), medium (10) and abundant (20). The germination percentage was independent of density and species mixtures. Germination time was density‐dependent for the mixed‐species treatment, but not the single‐species treatments. Six species had a shorter germination time, suggesting a group priority effect. Other species delayed or did not alter their germination time, indicating that the response to intraspecific seed densities is species‐specific. These findings illustrate that even though species have a history of coexistence and characteristics of rapid germination, seeds can alter germination time if they perceive neighbouring seeds of other species. Species that respond with a faster germination time may have a competitive advantage for recruitment and growth. These terrestrial species show high initial colonization power, which is essential in the regeneration of wetlands after flood disturbance.
Publisher: Springer Science and Business Media LLC
Date: 28-06-2014
Publisher: FapUNIFESP (SciELO)
Date: 03-2021
Publisher: Wiley
Date: 30-03-2018
DOI: 10.1111/BTP.12550
Publisher: Springer Science and Business Media LLC
Date: 21-01-2022
DOI: 10.1186/S13717-021-00353-X
Abstract: Predicting how natural and anthropogenic drivers shape different ecological indicators, such as plant populations along environmental gradients, can be a relevant tool for establishing management and conservation criteria of tropical wetlands. We aimed to assess the effects of seasonal flood disturbance, type of grasslands and topographical conditions on Croton trinitatis population distribution in a tropical wetland. The study was carried out in a seasonally flooded grassland (Central-West Brazil). We conducted s lings of soil on the dry and flood hydrophases of the Pantanal. We took the s les in eight seasonal ponds, with 1 km interval between them. Transects were marked during the flood period, observing the water level, one in the lowest zone, in the middle of the pond = low (ca. 60 cm deep), one at the pond edge = mid (ca. 30 cm deep) and one in the higher zone, on the external part = high (ca. 1 cm deep). The results showed that the topography, seasonality, and types of grassland determine differences in the abundance patterns of adult plants and seedlings, and seed bank and seed predation. The abiotic factors can shape plant population-related ecological processes and patterns, with outputs (germination and predation) and inputs (local dispersion and from neighbouring areas) of proportional seeds for the population maintenance in this environment. We emphasize the importance of these findings, to show that abiotic factors are not the only ones to be considered in ecological studies of distribution and structuring of populations in habitats with extreme seasonal events.
Publisher: Springer Science and Business Media LLC
Date: 20-11-2017
Publisher: Oxford University Press (OUP)
Date: 16-02-2021
DOI: 10.1093/JPE/RTAB014
Abstract: Our objective was to quantify the contributions of the seed bank and the established vegetation to the species composition, functional composition and ersity, and discuss the implications of these differences in regeneration and persistence of floodplain plant communities. We s led all ground cover vegetation up to 1.5 m height and seed bank in 25 plots (10 m × 1 m) distributed across five sites in dry and rainy seasons in a periodically flooded savanna in the Pantanal wetland, Brazil. We evaluated the soil seed bank by seedling emergence method. The seed bank species had traits that conferred regeneration to the communities, while persistence traits characterized the vegetation. The seed bank had higher functional richness and lower functional evenness than the vegetation. The existence of different plant traits between seed bank and vegetation allowed the coexistence of species with functionally contrasting persistence and regeneration traits, which may help maintain functional ersity. It may allow the community to be more resilient when dealing with different environmental filters such as drought, fire and flood.
Location: Brazil
No related grants have been discovered for Francielli Bao.