Papers by Mônica Tognella
Programa de Pós-Graduação em Oceanografia Ambiental, Jun 29, 2016
Photosynthetica, Sep 8, 2022
PITotal-performance index for energy conservation from exciton to the reduction of PSI end accept... more PITotal-performance index for energy conservation from exciton to the reduction of PSI end acceptors; PN-net photosynthetic rate; Qleaf-luminous intensity incident on the leaf surface; TR0/RC-trapped energy flux per RC; WUE-water-use efficiency; δR0efficiency with which an electron from the intersystem reduces the final acceptor of PSI; φD0-maximum efficiency of nonphotochemical de-excitation; φE0-quantum yield for electron transport; φP0-maximal quantum yield of PSII photochemistry; Ψ0-the probability of electron transport further than QA- .
Photosynthetica, Nov 1, 2019
This study evaluated the photosynthetic efficiency in Rhizophora mangle plants in two mangrove fo... more This study evaluated the photosynthetic efficiency in Rhizophora mangle plants in two mangrove forests, the highest salinity (HS) area, and the lower salinity (LS) area. The CO2 assimilation rate (PN), stomatal conductance, leaf transpiration, intrinsic water-use efficiency, and chlorophyll a fluorescence L-band, IP-phase, and performance index were higher in the LS area. The instantaneous water-use efficiency, initial fluorescence, maximum fluorescence, and J-step were higher in the HS area. The plants growing in the HS area exhibited greater efficiency in electron transfer between the oxygen-evolving complex and the acceptor side of the PSII. The plants growing in the LS area exhibited greater efficiency of the reduction of the final acceptors of the PSI, an important strategy to the stress conditions. The results show that a greater variation in salinity in the LS area had the effect on PN and long-term changes in the rainfall regime may alter the vegetation community of mangrove forests.
Ornamental Horticulture
In order to establish a link between the evolutionary history and the photochemical attributes, m... more In order to establish a link between the evolutionary history and the photochemical attributes, measurements of chlorophyll (Chl) a fluorescence were made in Cattleya warneri, C. shofieldiana and C. harrisoniana exposed to high irradiance for 5, 35, and 120 min (hereafter referred to as treatments T5, T35, and T120, respectively). The following questions are addressed: (1) Is the increased energy dissipation enough to counterbalance the excess energy that drives photosynthesis at different times of high irradiance exposure? (2) Is there an influence of the incidence and duration of light radiation on Cattleya species in full sunlight, compared to Cattleya species submitted to low irradiance? Higher relative variable fluorescence at the J-step (Vj) values followed by the lower quantum yield of electron transport (ψEo) indicate the accumulation of reduced Quinone A (QA) proportionally of sunflecks exposure time in C. warneri. The higher performance index (PIABS) and plasticity index v...
Regional Studies in Marine Science
Anais da Semana de Biologia da UFES de Vitória, Apr 15, 2021
Interciencia, 2000
Resumen en: Population features of the grapsid crab Aratus pisonii, a common inhabitant of the su... more Resumen en: Population features of the grapsid crab Aratus pisonii, a common inhabitant of the supralittoral zone of roots, branches and canopy of several species ...
Universidade Federal do Espírito Santo, Jul 11, 2016
Journal of Ethnobiology and Ethnomedicine, Mar 19, 2012
Background: Blue Land Crab (Cardisoma guanhumi) is one of the most important crustacean species c... more Background: Blue Land Crab (Cardisoma guanhumi) is one of the most important crustacean species captured and commercialized in Brazil. Although this species is not considered to be threatened with extinction, populations of C. guanhumi are known to be rapidly diminishing due to heavy harvesting pressures and degradation of their natural habitats, highlighting the necessity of developing and implanting management and protection strategies for their populations. There have been no ethnozoological publications that have focused specifically on C. guanhumi, in spite of importance of this type of information for developing efficient management plans of resource utilization. So, the present work describes the ethnoecological aspects of the capture and commercialization of C. guanhumi by a fishing community in northeastern Brazil. Methods: Field work was carried out in the municipality of Mucuri, Bahia in Brazil, between the months of January and March/2011 through the use of open semi-structured interviews with all of the crustacean harvesters in city who acknowledged their work in capturing this species, totaling 12 interviewees. The informants were identified through the use of the "snowball" sampling technique. In addition to the interviews themselves, the "guided tour" technique and direct observations was employed. Results: According all the interviewees, the C. guanhumi is popularly called "guaiamum" and is collected in "apicum" zones. They recognize sexual dimorphism in the species based on three morphological characteristics and the harvesters also pointed two stages in the reproductive cycle during the year and another phase mentioned by the interviewees was ecdysis. All of the interviewed affirmed that the size and the quantities C. guanhumi stocks in Mucuri have been diminishing. All of the interviewees agreed that the species and other mangrove resources constituted their principal source of income. The harvesters dedicated three to five days a week to collect Blue Land Crabs and the principal technique utilized for capturing is a trap called a "ratoeira" (rat-trap). Conclusions: The results of the present work demonstrated that the community retains a vast and important volume of knowledge about C. guanhumi that could subsidize both scientific studies and the elaboration of viable management and conservation strategies for this species.
Journal of Ethnobiology and Ethnomedicine, Nov 16, 2011
Background: Lethargic Crab Disease (LCD) has caused significant mortalities in the population of ... more Background: Lethargic Crab Disease (LCD) has caused significant mortalities in the population of Ucides cordatus crabs in the Mucuri estuary in Bahia State, Brazil, and has brought social and economic problems to many crabharvesting communities that depend on this natural resource. The present work examined the perceptions of members of a Brazilian crab harvesting community concerning environmental changes and the Lethargic Crab Disease. Methods: Field work was undertaken during the period between January and April/2009, with weekly or biweekly field excursions during which open and semi-structured interviews were held with local residents in the municipality of Mucuri, Bahia State, Brazil. A total of 23 individuals were interviewed, all of whom had at least 20 years of crab-collecting experience in the study region. Key-informants (more experienced crab harvesters) were selected among the interviewees using the "native specialist" criterion. Results: According to the collectors, LCD reached the Mucuri mangroves between 2004 and 2005, decimating almost all crab population in the area, and in 2007, 2008 and 2009 high mortalities of U. cordatus were again observed as a result of recurrences of this disease in the region. In addition to LCD, crabs were also suffering great stock reductions due to habitat degradation caused by deforestation, landfills, sewage effluents, domestic and industrial wastes and the introduction of exotic fish in the Mucuri River estuary. The harvesting community was found to have significant ecological knowledge about the functioning of mangrove swamp ecology, the biology of crabs, and the mass mortality that directly affected the economy of this community, and this information was largely in accordance with scientific knowledge. Conclusions: The study of traditional knowledge makes it possible to better understand human interactions with the environment and aids in the elaboration of appropriate strategies for natural resource conservation.
Coasts
The effects of iron, manganese, zinc, copper, and lead on the chlorophyll content, carbon assimil... more The effects of iron, manganese, zinc, copper, and lead on the chlorophyll content, carbon assimilation, and the antiradical activity of Rhizophora mangle and Laguncularia racemosa were evaluated in regions affected by the Fundão dam disruption in Brazil. The mine waste which settled and accumulated in the sediments could represent long-term contamination. It can be expected that the iron oxyhydroxides deposited in the sediments will be solubilized, leading to chronic contamination by trace metals and the accumulation of these metals in the biota. In this sense, biological indicators prove to be important tools to assess this type of damage. The different bioaccumulation of metals by the species revealed that R. mangle was more impacted by Mn and Cu and that L. racemosa showed alterations in its physiological responses in the presence of Cu, Zn, and Fe. The concentration of these metals in the leaves, with values above previous local reference limits, was associated with reductions i...
Dissertação apresentada ao Programa de Pós-Graduação em Biodiversidade tropical da Universidade F... more Dissertação apresentada ao Programa de Pós-Graduação em Biodiversidade tropical da Universidade Federal do Espírito Santo, como requisito parcial para obtenção do título de Mestre em Biodiversidade, na área de concentração Ecofisiologia Vegetal.
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Papers by Mônica Tognella