ORCID Profile
0000-0001-8467-4667
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Publisher: FapUNIFESP (SciELO)
Date: 06-2015
DOI: 10.1590/01047760201521021609
Abstract: Neste estudo, objetivou-se caracterizar florística e estruturalmente a comunidade arbórea em uma área de encosta, Caatinga arbórea e em área ecotónal com cerrado no Parque Nacional Cavernas do Peruaçu, Norte de Minas Gerais, buscando testar as seguintes hipóteses: 1- Existem diferenciações florísticas entre os ambientes 2- Todos os ambientes apresentam as mesmas características quanto à estrutura. Foram confeccionados diagrama de Venn e histogramas de frequência da distribuição de in íduos por classes de diâmetro. Foi feita a análise de Espécies Indicadoras e foram calculados os parâmetros fitossociológicos clássicos. Foram encontradas 305 espécies, distribuídas em 173 gêneros e 48 famílias. Sendo que, na encosta, foram encontradas 166 espécies, na Caatinga arbórea foram encontradas 204 espécies e na área ecotonal foram encontradas 155 espécies. Muitas espécies foram exclusivas a cada ambiente, sendo 54 à encosta, 65 à Caatinga arbórea e 35 ao ecótono. Apenas 69 espécies foram comuns aos três ambientes. Foram amostrados 1391 in íduos, resultando em uma estimativa de 1340,62, 1765 e 1280 in íduos.ha-1 na encosta, Caatinga arbórea e ecótono, respectivamente. A área basal em m2.ha-1 foi 47,64, 30,05 e 23,29, respectivamente. Já, o índice de ersidade de Shannon foi 3,49, 3,74 e 3,61 nats.in íduo-1, e a equabilidade de Pielou foi de 0,80, 0,84 e 0,85. Com relação à distribuição dos in íduos em classes de diâmetro, a Caatinga arbórea e encosta apresentaram um mesmo padrão, com uma diminuição gradual do número de in íduos. Já, o ambiente ecotonal apresentou uma distribuição tendendo a normal.
Publisher: Commonwealth Forestry Association
Date: 08-2015
Publisher: FapUNIFESP (SciELO)
Date: 18-10-2018
DOI: 10.1590/1806-90882018000200011
Abstract: ABSTRACT Caatinga represents one of the two major centers of Seasonally Dry Tropical Forests (SDTF) and is completely inserted in the Brazilian territory. The present work aimed to evaluate the structure of two micro-environments and relate them to environmental variables. Twenty 20 × 20 m plots were placed in which we measured the height and CBH and made the botanical identification of all trees with CBH ≥10 cm. The CCA and indicator species analysis presented a clear distribution of species according to the micro-environments. We concluded that the presence of limestone slabs provided the formation of microhabitats, thus influencing the distribution and composition of tree species, what characterized the phytoecological unit here referred as “furados”.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 18-12-2020
Abstract: The carbon sink of southeastern Brazil seasonal forests is decreasing over time in 2013, the carbon sink became a carbon source.
Publisher: Springer Science and Business Media LLC
Date: 26-11-2013
Publisher: Springer Science and Business Media LLC
Date: 21-11-2019
Publisher: American Association for the Advancement of Science (AAAS)
Date: 28-09-2022
Abstract: Deadwood is a large global carbon store with its store size partially determined by biotic decay. Microbial wood decay rates are known to respond to changing temperature and precipitation. Termites are also important decomposers in the tropics but are less well studied. An understanding of their climate sensitivities is needed to estimate climate change effects on wood carbon pools. Using data from 133 sites spanning six continents, we found that termite wood discovery and consumption were highly sensitive to temperature (with decay increasing .8 times per 10°C increase in temperature)—even more so than microbes. Termite decay effects were greatest in tropical seasonal forests, tropical savannas, and subtropical deserts. With tropicalization (i.e., warming shifts to tropical climates), termite wood decay will likely increase as termites access more of Earth’s surface.
No related grants have been discovered for Marco Aurélio Leite Fontes.