Relação entre o índice de avermelhamento do solo e o estoque de carbono na biomassa aérea da vegetação de cerrado

Santana, Otacílio Antunes; Encinas, José Imaña; Inácio, Euzelina dos Santos Borges; Amorim, Laerte Bezerra de; Vilaverde, João Luiz Jardim

doi:10.5902/1980509812362

Cited by 7 publications

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“…The leaf area index and leaf area reductions were observed in response to the need of reducing photosynthesis (Santana & Encinas, 2011). Researchers conducted in dystrophic environments (water and nutrients shortage) showed the plant sensitivity to minimal changes in climate or abiotic data and herbivory attack (Santos et al, 2014;Santana et al, 2010;Santana & Encinas, 2011Santana, Encinas, Inácio, Amorim, & Vilaverde, 2013;Santana, Santos, Silva, Morais, & Encinas, 2015), and this was observed in this work. The plant individual takes out efficiently the available resource and this is an attribute of Semiarid and Arid species (Santos et al, 2014).…”

Section: Discussionsupporting

confidence: 63%

Dendrophysiological plant strategies of Poincianella pyramidalis (Tul.) L.P. Queiroz after wood herbivory in semiarid region of Paraíba - Brazil

Santana

Encinas

2016

Acta Sci. Biol. Sci.

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ABSTRACT. The increase in Equus africanus asinus Linnaeus population in semiarid areas of Northeast Brazil had significant impacts on wild and rural areas. The objective of this work was to analyze the herbivory of E. africanus asinus on Poincianella pyramidalis (Tul). L.P. Queiroz and determine the dendrophysiological strategies P. pyramidalis used during and after damage caused by E. africanus asinus. The selected areas have significant populations of P. pyramidalis with amplified importance value higher than 50%. Two areas were established: one control and another experimental, with presence of E. africanus asinus. The study was carried out from 2001 to 2015. The evaluated variables of P. pyramidalis were: sap flow, basic density, diameter, volume, biomass and leaf area index. The increase of abandoned E. africanus asinus in semiarid areas resulted in impact and responses from P. pyramidalis. This plant species compensates for biomass losses and physiological activities reduction with two strategies: i) increase in the belowground biomass stock, and ii) increase in sap flow in undisturbed branches.Keywords: ecological interactions, ecophysiology, survival strategies.Estratégias dendrofisiológicas em Poincianella pyramidalis (Tul.) L.P. Queiroz depois da herbivoria no tronco em regiões semiáridas na Paraíba -Brasil RESUMO. O aumento da população de Equus africanus asinus Linnaeus em áreas do Semiárido doNordeste brasileiro teve um impacto significativo sobre as áreas silvestres e rurais. O objetivo desse trabalho foi analisar a herbivoria de E. africanus asinus sobre a espécie vegetal Poincianella pyramidalis (Tul). L.P. Queiroz e quais as estratégias dendrofisiológicas que essa espécie (P. pyramidalis) utilizou no momento e depois do dano causado pelo E. africanus asinus. As áreas selecionadas possuem significante presença populacional de P. pyramidalis, com valor de importância ampliada maior do que 50%. Duas áreas foram estabelecidas: uma controle e outra experimental com a presença de E. africanus asinus. O estudo foi realizado de 2001 a 2015. As variáveis avaliadas de P. pyramidalis foram: fluxo da seiva, densidade básica, diâmetro, volume, biomassa e índice de área foliar. O aumento da população de E. africanus asinus abandonados em áreas do Semiárido resultou em impacto e respostas na espécie P. pyramidalis. Essa espécie vegetal compensou suas perdas dendrométricas e redução nas atividades fisiológicas com duas estratégias: i) aumento no estoque de biomassa abaixo da superfície do solo; e ii) aumento do fluxo de seiva nos ramos não impactados.Palavras-chave: interações ecológicas, ecofisiologia, estratégias de sobrevivência.

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Section: Discussionsupporting

confidence: 63%

Dendrophysiological plant strategies of Poincianella pyramidalis (Tul.) L.P. Queiroz after wood herbivory in semiarid region of Paraíba - Brazil

Santana

Encinas

2016

Acta Sci. Biol. Sci.

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“…All the answers went towards what the biophysical variable represents, no students were left behind in the field of building knowledge about the physical concept taught. And this confirms that theories in the field of exact sciences do not have a degree of difficulty that is in the imagination of students, especially in basic education, what is missing is the engagement of students in a direct application of the concept [54], [55], [56], [57], [58], [59].…”

Section: Resultssupporting

confidence: 59%

Interactive Model Tool about Center of Mass during COVID-19 Pandemic: A New Learning Path in STEM for K-12 Education

Santana

Braga

et al. 2020

2020 IEEE International Conference on Teaching, Assessment, and Learning for Engineering (TALE)

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the pandemic closure brings [4], [5]. This plan was a challenge to K-12 students from Public Schools: physical exercises in which the students could learn in a playful and experiential way a concept of Natural Sciences [6]. This challenge focused on building cognitive, socio-emotional, and behavioral skills, and on quality of life through the care of the physical health of educational actors [7].The chosen concept was the "center of mass" because it is a biometric, dynamic, and contextual variable linked to body movement -kinesiology [8], [9], where students could be experienced in the quarantine period ('lockdown') through physical exercises. Also, there is a significant probabilistic relationship between the more a child is physically active (spontaneous and induced sports practices), the more the child's ability to learn and solve problems (within the zone of proximal development) [10], [11].An Interactive Model ("Change your Center of Mass!") was built based on a mathematical model with the center of mass as a dependent variable and independent variables: body mass index and vertical jump, in which students and teachers could insert data, and qualify as your center of mass is: from regular (not very active physically) to excellent (in activity with high performance). And this interaction with the Model could be a motivating factor for the student to remain active during and after the pandemic.The center of mass is a hypothetical point where the whole mass converges as if all external forces were being applied at that point. The center of mass can coincide with the center of gravity when a human body is under the influence of a uniform gravitational field [8], [12], [13]. This biophysical variable is important because it is related to the student's biomechanics and biometrics, his body volume has a direct and proportional relationship with his movement, it can be quantified (e.g. body mass index on running speed) and qualified: the perceptual effort used to get out of inertia (e.g. laziness) [14].Jumping jacks is a physical exercise in which you can study and analyze the center of mass about its induced variation because it is a vertical movement in which, over time, we can verify a variation in the position of the center of mass in student (or athlete), if students are actives and change Abstract-The pandemic caused by Sars-CoV-2 resulted in a period of physical distance and school closures. This motivated us to elaborate on some physical and psychological harm reduction plan for the students. A challenge was proposed to K-12 students from Public Schools of the Recife City: physical exercises in which the students could learn playfully and experientially a concept of Natural Sciences. The chosen concept was the "center of mass" because it is a biometric, dynamic, and contextual variable linked to body movement, which could be experienced in the quarantine period. The objectives of this work were: (i) to propose a challenge through the physical exercise to K-12 students (jumping jacks), which implies the study...

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“…No entanto, para a borda do remanescente inferiu-se que 57 % das amostras apresentaram classificação "vermelho-amarelo", 23 % das amostras foram classificadas pertencentes à classe "vermelho" e os 20 % restantes possuem classificação "amarelo". Assim, e em consonância com o estudo de Santana et al (2013), os valores referentes ao estoque de carbono na vegetação e ao índice de vermelho são maiores em regiões onde há a presença de vegetação mais densa. Neste contexto, as Figuras 4 e 5 e a Tabela 6 trazem as análises de correlações entre o IAF, o teor de matéria orgânica (MO) e o índice de vermelho (RR).…”

Section: Garcia J M Et Al 184unclassified

Uso De Fotografias Hemisféricas Para Avaliação Da Qualidade Ambiental Na Mata De Santa Genebra, Campinas-Sp, Brasil

Garcia¹,

Longo²,

Penereiro³

et al. 2018

Ciênc. Florest.

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RESUMOAtualmente, o desenvolvimento de grandes centros tem exercido pressão constante em remanescentes florestais localizados em áreas urbanas. O estudo dos impactos ambientais aos quais estes são expostos permite a melhor gestão e conservação de remanescentes florestais localizados nestas áreas. Nesse contexto, o presente trabalho teve por objetivo avaliar os impactos da degradação em áreas de borda e do interior da Mata de Santa Genebra, um remanescente florestal constituído 85 % em floresta estacional semidecidual, localizada no distrito de Barão Geraldo (Campinas -SP). Tomaram-se 19 pontos no interior do remanescente, obtendo-se três fotografias para cada ponto, equidistantes 200 metros entre si e cada um a uma distância de 5 metros das trilhas percorridas. Adicionalmente, tomaram-se 40 pontos na área das bordas do remanescente, também abordados em triplicata, equidistantes 200 metros entre si e cada um a uma distância de 10 metros do limite da borda do remanescente florestal. Os resultados permitem concluir que, no inverno, por meio de análises do Índice de Área Foliar, a borda do remanescente florestal encontra-se mais degradada que o seu interior, inclusive apontando os locais cuja degradação apresentou-se mais pronunciada, necessitando de ações mais emergenciais para sua recuperação. Esses resultados são provavelmente decorrentes das influências antropogênicas sofridas nos trechos trabalhados da mata estudada. Palavras-chave: degradação ambiental; índice de área foliar; remanescente florestal. ABSTRACTCurrently, the development of large centers has exerted constant pressure on the remaining forests located in urban areas. The study of environmental impacts to which they are exposed allows better management and conservation of forest remnants located in this areas. In this context, the present study aimed to evaluate the impacts of degradation in forest border areas and inside of Mata de Santa Genebra, a forest remnant constituted 85% of semideciduous forest, located in Barão Geraldo district (Campinas, SP). They took up 19 points within the remaining, three photos were taken for each point, equidistant 200 meters from each other and each at a distance of 5 meters from the traversed tracks. Additionally, 40 points in the remainder of the edge area, also discussed in triplicate, equally spaced 200 meters apart and each at a distance of 10 meters from the edge of the forest fragment. The results lead to the conclusion that in the winter, through the Leaf Area Index analyzes, the edge of the remaining forest is more degraded in the interior, including point out of the places where degradation had become more pronounced and they need more emergency actions for their

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Relação entre o índice de avermelhamento do solo e o estoque de carbono na biomassa aérea da vegetação de cerrado

Cited by 7 publications

References 1 publication

<b>Dendrophysiological plant strategies of <i>Poincianella pyramidalis</i> (Tul.) L.P. Queiroz after wood herbivory in semiarid region of Paraíba - Brazil

<b>Dendrophysiological plant strategies of <i>Poincianella pyramidalis</i> (Tul.) L.P. Queiroz after wood herbivory in semiarid region of Paraíba - Brazil

Interactive Model Tool about Center of Mass during COVID-19 Pandemic: A New Learning Path in STEM for K-12 Education

Uso De Fotografias Hemisféricas Para Avaliação Da Qualidade Ambiental Na Mata De Santa Genebra, Campinas-Sp, Brasil

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