ORCID Profile
0000-0003-3081-8973
Current Organisation
Universidade Federal de Mato Grosso do Sul
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Publisher: Wiley
Date: 16-12-2013
DOI: 10.1111/BTP.12080
Publisher: Elsevier BV
Date: 09-2021
Publisher: Elsevier BV
Date: 02-2020
Publisher: Springer Science and Business Media LLC
Date: 27-11-2013
Publisher: FapUNIFESP (SciELO)
Date: 09-02-2017
DOI: 10.1590/0001-3765201720150049
Abstract: Banded iron formations (BIF) have a particular vegetation type and provide a good model system for testing theories related to leaf phenology, due to unique stressful environmental conditions. As a consequence of the stressful conditions of BIF environment, we hypothesize that most species would retain at least some significant canopy cover, even at the end of the dry season, independently of growth form - trees, shrubs, and sub-shrubs. Considering the strong seasonality, we also hypothesize that photoperiod and rainfall act as triggers for leaf fall and leaf flushing in these environments. The majority of the fifteen studied species had a semi-deciduous behavior and shed their leaves mainly during the dry season, with a recovery at the end of this season. In general, leaf flushing increased around the spring equinox (end of the dry season and start of the rainy season). A trade-off between leaf loss and leaf maintenance is expected in a community in which most plants are naturally selected to be semi-deciduous. Our results suggest photoperiod as a dominant factor in predicting leaf phenology.
Publisher: Elsevier BV
Date: 06-2023
Publisher: Springer Science and Business Media LLC
Date: 10-04-2021
Publisher: Wiley
Date: 10-2016
DOI: 10.1111/AVSC.12264
Publisher: Wiley
Date: 03-2022
Abstract: Indigenous people have been managing fire‐prone landscapes for millennia, especially in tropical savannas, thereby maintaining carbon stocks and pyro ersity and ensuring food security. In some indigenous lands in Brazil, fire brigades are composed of indigenous people, integrating their traditional knowledge in Brazilian fire management policies however, the effectiveness of their management is largely undocumented. Nevertheless, we need to know the effectiveness of indigenous fire brigades and their influence on fire patterns. Here, we evaluate an 18‐year historical series of fire patterns and burn scars, comparing periods with and without indigenous brigade activity, to describe the role of indigenous fire brigades in the Kadiwéu Indigenous Territory. In this Indigenous Territory, fire brigades composed of indigenous people have been instituted, trained and maintained by the National Center of Prevention and Combat of Wildfire (PREVFOGO/IBAMA) since 2009. These brigades are responsible for fire management throughout the Kadiwéu Indigenous Territory using controlled burning, prescribed burning and combating wildfires. We found that fire management by the indigenous brigades has reduced fire frequency by 80% in the areas with high fire frequency (over 70% of the analysed time). Management also reduced the size of the area burned by 53% and the influence of climate over the total area burned. According to our models, the area affected by fires is mainly influenced by annual rainfall in the absence of indigenous brigades in contrast, climatic factors could not explain the variation in the burned area in the period without indigenous brigades. Synthesis and applications . The fire management realized by the indigenous brigades can modify the fire regime. These changes in the fire regime can include: changes in spatial patterns, the magnitude of fires and reduction in the influence of climate on fire regimes. Hence, the management carried out by the indigenous brigades can be considered an important tool for fire management. In addition to demonstrating the importance of programs that integrate traditional indigenous knowledge with fire management policies, such as the Integrated Fire Management (IFM), to construct effective management strategies.
Publisher: Wiley
Date: 04-03-2015
DOI: 10.1111/AVSC.12163
Publisher: Elsevier BV
Date: 2013
Publisher: Elsevier BV
Date: 07-2023
Publisher: Wiley
Date: 04-2022
DOI: 10.1111/REC.13660
Abstract: In 2012, the Native Vegetation Protection Law 12,651 decreased the extent of Areas of Permanent Preservation in Brazil. While previously the distance from water was measured during the rainy season, the new version only considered the extent of the regular watercourse. This change affects conservation and restoration sites, and restoration programs need to be modified based on the new legislation. For instance, more flood‐tolerant species need to be planted, given the higher probability that restoration efforts will be lost during flooding. To identify species suitable for the restoration of such areas, we tested if plants that develop morphological structures to tolerate waterlogging stress are more resistant to hypoxia caused by flooding and can recover better afterwards. We experimentally evaluated survival and morphological or phenological strategies (root dry mass, height, basal diameter, adventitious roots, lenticels, and leaf renewal) of 13 tree species from the Cerrado and Pantanal biomes of Brazil. After 56 days of simulated inundation and 56 days of post‐inundation recovery, we found that all study species were able to survive on waterlogged soil and to recover after the flood, and they can be used to restore periodically flooded riparian forests within the new legal zone. Our study is particularly relevant, as climate change is expected to increase flooding. As environmental laws change and new areas get restored including those in artificially flooded areas, such as on banks of hydroelectric dams, the experimental approach introduced in this study should be replicated with other species from various phytogeographic domains worldwide.
Publisher: Wiley
Date: 24-10-2013
DOI: 10.1111/DDI.12136
Publisher: FapUNIFESP (SciELO)
Date: 12-2020
Publisher: SAGE Publications
Date: 2017
Publisher: Springer Science and Business Media LLC
Date: 31-08-2022
Publisher: Elsevier BV
Date: 10-2023
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 03-2021
Publisher: Wiley
Date: 25-04-2014
DOI: 10.1111/REC.12091
Publisher: Wiley
Date: 14-05-2021
Abstract: Optimal sexual reproduction in relation to fire effects varies in Fabaceae species. Calliandra species have a large investment in reproduction. We investigated the consequences of fire during the fruiting period of Calliandra parviflora Benth., by checking fruit exposure to fire, pre‐dispersal seed predator infestation, and the effect of fruit burning on germination. We conducted this study in a floodable savanna in central Brazil, where we collected burnt and unburnt fruits. We measured the fruit and seed mass, and counted the number of damaged and undamaged seeds and live larvae per fruit. We analyzed the seed germination percentage from burnt and unburnt fruits. The burnt fruits presented greater mass than the unburnt fruits, despite their seed mass being similar. The number of damaged seeds per fruit was only slightly higher in burnt compared to unburnt fruits ( p = 0.047). The number of larvae on pre‐dispersal seeds per fruit varied from 0 to 4 and did not differ between burnt and unburnt fruits. The germination percentage of unburnt fruit seeds (mean = 22 ± 17%), was significantly higher than that of burnt fruit (mean = 3.0 ± 2.0%, p 0.001). Fire during fruiting or pre‐dispersion decreases seed germination from 22 to 3%, but it does not hurt vegetative regeneration or resprout capacity of C. parviflora , which is a facultative seeder. Hence, we suggest that C. parviflora has potential for post‐fire restoration in floodable open grassy savannas, in the ecotone between Cerrado and Pantanal, because this species may sprout quickly after first post‐fire rains.
Publisher: Elsevier BV
Date: 04-2020
Publisher: Springer Science and Business Media LLC
Date: 17-01-2022
Publisher: Springer Science and Business Media LLC
Date: 04-09-2020
Publisher: Elsevier BV
Date: 12-2020
Publisher: Elsevier BV
Date: 12-2017
Publisher: Elsevier BV
Date: 2023
DOI: 10.2139/SSRN.4510907
Publisher: Elsevier BV
Date: 04-2016
Publisher: Wiley
Date: 2017
DOI: 10.1002/EAP.1461
Abstract: In November 2015, a large mine-tailing dam owned by Samarco Corporation collapsed in Brazil, generating a massive wave of toxic mud that spread down the Doce River, killing 20 people and affecting bio ersity across hundreds of kilometers of river, riparian lands, and Atlantic coast. Besides the disaster's serious human and socioeconomic tolls, we estimate the regional loss of environmental services to be ~US$521 million per year. Although our estimate is conservative, it is still six times higher than the fine imposed on Samarco by Brazilian environmental authorities. To reduce such disparities between estimated damages and levied fines, we advocate for an environmental bond policy that considers potential risks and environmental services that could possibly be impacted by irresponsible mining activity. Environmental bonds and insurance are commonly used policy instruments in many countries, but there are no clear environmental bond policies in Brazil. Environmental bonds are likely to be more effective at securing environmental restitution than post-disaster fines, which generally are inadequate and often unpaid. We estimate that at least 126 mining dams in Brazil are vulnerable to failure in the forthcoming years. Any such event could have severe social-environmental consequences, underscoring the need for effective disaster-management strategies for large-scale mining operations.
Publisher: Elsevier BV
Date: 02-2020
Publisher: FapUNIFESP (SciELO)
Date: 06-2006
DOI: 10.1590/S0102-33062006000200019
Abstract: O objetivo desse estudo foi avaliar o comportamento germinativo de Bacccharis retusa e Tibouchina multiflora, espécies que ocorrem na vegetação de canga no Quadrilátero Ferrífero de Minas Gerais. Diásporos coletados no município de Barão de Cocais foram colocados para germinar nas temperaturas de 15, 20, 25 e 30 ºC na presença de luz contínua ou no escuro. As sementes mantidas inicialmente no escuro foram posteriormente transferidas para a presença de luz, mantendo-se as mesmas temperaturas. Os diásporos das duas espécies apresentaram comportamento fotoblástico positivo, com germinação inexpressiva no escuro em todas as temperaturas testadas. Na presença de luz contínua as sementes de T. multiflora não apresentaram diferenças na porcentagem final de germinação em todas as temperaturas testadas, mas B. retusa apresentou menor porcentagem final de germinação a 30 ºC. Os diásporos das duas espécies mantidos inicialmente no escuro, germinaram rapidamente após serem transferidos para luz branca contínua. Entretanto, não foi verificado efeito significativo do tempo de permanência no escuro nos valores finais de porcentagem de germinação alcançados a cada temperatura. Esses resultados sugerem que essas duas espécies de canga apresentam potencial para a formação de banco de sementes no solo.
Publisher: Wiley
Date: 15-10-2019
DOI: 10.1002/EAP.2000
Abstract: The practice of using green manure for ecological restoration has grown so significantly that there is a shortage of seeds for purchase on the market. Nonetheless, there is very little literature available demonstrating the effects and benefits commonly cited for green manure for addressing important environmental filters, such as herbivory and invasive grasses. Our objective is to determine which spatial sowing arrangement including green manure promotes the lowest rates of herbivory on native species and decreases cover by invasive grasses in ecological restoration. We experimentally tested three sowing configurations of green manure intercropping with native species: T1 the lowest herbivoy rate for both native and green manure, mixture of native and green manure species in the same row, T2, alternating rows of green manure and native species, and T3, rows of native species intercropped with a 2 m wide strip of green manure. We found that (1) green manure species experience greater damage from herbivory than do native species, with average values ranging from 1.8 times higher values in green manure than natives in T1, 2.9 times in T2, and 2.7 times in T3 (when sown in rows and in broader strips, green manure and native species attract more herbivorous insects than if they were sown together [muvuca]) and (2) when green manure and native species are planted mixed in the same row they produce greater soil cover, and thus limit invasion by undesired species. The use of green manure has been identified as an alternative method for overcoming the environmental filters of herbivory and invasive grasses in restoration areas. Considering the demand for information that supports the use of green manure for purposes of ecological restoration, the novel results of the present study fill a void and should prove to be of great interest to researchers and practitioners. In addition, the presented results provide information on efficient and low-cost restoration techniques that are necessary for the activity to gain scale, enabling countries to meet the large restoration targets.
Publisher: Elsevier BV
Date: 05-2014
Publisher: Wiley
Date: 07-12-2022
DOI: 10.1002/ECY.3852
Abstract: Advancing functional ecology depends fundamentally on the availability of data on reproductive traits, including those from tropical plants, which have been historically underrepresented in global trait databases. Although some valuable databases have been created recently, they are mainly restricted to temperate areas and vegetative traits such as leaf and wood traits. Here, we present Rock n' Seeds, a database of seed functional traits and germination experiments from Brazilian rock outcrop vegetation, recognized as outstanding centers of ersity and endemism. Data were compiled through a systematic literature search, resulting in 103 publications from which seed functional traits were extracted. The database includes information on 16 functional traits for 383 taxa from 148 genera, 50 families, and 25 orders. These 16 traits include two dispersal, six production, four morphological, two biophysical, and two germination traits—the major axes of the seed ecological spectrum. The database also provides raw data for 48 germination experiments, for a total of 10,187 records for 281 taxa. Germination experiments in the database assessed the effect of a wide range of abiotic and biotic factors on germination and different dormancy‐breaking treatments. Notably, 8255 of these records include daily germination counts. This input will facilitate synthesizing germination data and using this database for a myriad of ecological questions. Given the variety of seed traits and the extensive germination information made available by this database, we expect it to be a valuable resource advancing comparative functional ecology and guiding seed‐based restoration and bio ersity conservation in tropical mega erse ecosystems. There are no copyright restrictions on the data please cite this paper when using the current data in publications also the authors would appreciate notification of how the data are used in publications.
Location: Brazil
No related grants have been discovered for Letícia Garcia.