Ecosystem
Mostrando 13-24 de 1032 artigos, teses e dissertações.
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13. Concentration of Metals in Plant Litter Produced in Regions of Caatinga in Southwest Bahia, Brazil
Plant litter has several functions in a forest ecosystem. Studies about plant litter are of great importance to better understand and conserve ecological environments. The objective of this study was to investigate the concentration of metals (Fe, Co, Ca, Cu, Ni, Mg, Mn and Zn) in Caatinga plant litter in the southwest region of Bahia. Plant litter was colle
J. Braz. Chem. Soc.. Publicado em: 2020-07
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14. DIFFERENTIAL RESPONSE OF EPIPHYTIC LICHEN TAXA TO AGRICULTURAL LAND USE IN A FRAGMENTED FOREST IN CENTRAL ARGENTINA
ABSTRACT The seasonally dry subtropical forest, especially the Espinal forest in central Argentina (one of the most fragmented ecoregions), is affected by intensive agricultural activity. These activities are the main anthropogenic sources of atmospheric nitrogen compounds and their effects on lichens have been extensively studied, making them excellent ecol
CERNE. Publicado em: 2020-06
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15. Geochemical Investigation of Tar Balls Collected in a Brazilian Beach Using Biomarkers, Ni/V, δ13C Ratios and Ultra-High Resolution FT-ICR Mass Spectrometry
Representative tar balls collected in two distinct years (2012 and 2014) in a beach along the State of Bahia, northeastern Brazil, were geochemically characterized in order to identify correlations between them and investigate potential sources. Terpanes and steranes biomarkers (detected by gas chromatography coupled to mass spectrometry, GC-MS), carbon stab
J. Braz. Chem. Soc.. Publicado em: 2020-04
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16. COMPLEXO ESTUARINO LAGUNAR MUNDAÚ-MANGUABA: CARACTERIZAÇÃO DA MATÉRIA ORGÂNICA NATURAL E INTERAÇÃO COM ÍONS Hg2+
The Mundaú-Manguaba lagoon estuary complex is the most important ecosystem in the state of Alagoas, and a source of sustenance for a large number of the state’s inhabitants. However, degradation by anthropic sources has been causing impacts on this ecosystem. Understanding the characteristics of the natural organic material of the waters of the mundaú-ma
Quím. Nova. Publicado em: 2020-02
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17. A criação de valor compartilhado com base em um ecossistema de inovação
Resumo Frente a uma mudança de percepção acerca do papel das organizações, tão importante quanto gerar lucro para os acionistas é gerar valor para a sociedade. Para tanto, parte-se do pressuposto de que a formação de um ecossistema de inovação, por intermédio da interconexão e inter-relação de uma rede de atores para gerar inovação, pode con
Cad. EBAPE.BR. Publicado em: 20/01/2020
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18. Mitochondrial genomes of genus Atta (Formicidae: Myrmicinae) reveal high gene organization and giant intergenic spacers
Abstract The ants of the genus Atta are considered important pests to agriculture in the Americas, although Atta species are also important contributors to ecosystem functions in the various habitats in which they occur. The aim of this study was to assemble four complete mitochondrial genomes of the genus Atta, construct the phylogenomic tree, and analyze t
Genet. Mol. Biol.. Publicado em: 13/01/2020
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19. Type 2 diabetes mellitus-related environmental factors and the gut microbiota: emerging evidence and challenges
The gut microbiota is a group of over 38 trillion bacterial cells in the human microbiota that plays an important role in the regulation of human metabolism through its symbiotic relationship with the host. Changes in the gut microbial ecosystem are associated with increased susceptibility to metabolic disease in humans. However, the composition of the gut m
Clinics. Publicado em: 10/01/2020
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20. PLANT RICHNESS AND LIFE FORM DIVERSITY ALONG VEGETATION AND FOREST USE GRADIENTS IN NORTHWESTERN PATAGONIA OF ARGENTINA
ABSTRACT The imbalace between the increase in the demand and the decrease in the supply of products from natural forests, partly explains the on-going development of exotic tree plantations. In northwestern Patagonia of Argentina, Pinus ponderosa (Pinaceae) afforestation plays a key role in ameliorate degraded soils, but may also reduce biodiversity. The eco
CERNE. Publicado em: 20/12/2019
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21. AMAZÔNIA BRASILEIRA, CELEIRO DO MUNDO: CIÊNCIA, AGRICULTURA E ECOLOGIA NO INSTITUTO AGRONÔMICO DO NORTE NOS ANOS 1940 E 1950
Resumo O artigo analisa as pesquisas científicas realizadas no Instituto Agronômico do Norte (IAN), instituição criada pela política desenvolvimentista do governo brasileiro para a utilização agrícola da Amazônia nas décadas de 1940 e 1950. Discutimos especialmente as pesquisas relacionadas à chamada “teoria do ecossistema florestal”, desenvol
Rev. Hist. (São Paulo). Publicado em: 09/12/2019
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22. PHYSICAL, MECHANICAL AND THERMAL BEHAVIOUR OF ADOBE STABILIZED WITH THE SLUDGE OF WASTEWATER TREATMENT PLANTS
ABSTRACT The need for treated water is essential for life. With the constant increase in population, the most common way to purify surface water is through conventional water treatment plants (WTPs). The high volume of residue (sludge) generated in this process is most often returned to the catchment site, negatively affecting the ecosystem. The sludge of WT
Eng. Agríc.. Publicado em: 09/12/2019
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23. AGRICULTURE IN URBAN ECOSYSTEMS: A STEP TO CITIES SUSTAINABILITY1
Resumo A Agricultura Urbana (AU) desempenha relações sustentáveis nas dimensões econômica, social e ambiental das cidades. Estando localizada na zona urbana, cultiva e processa produtos alimentares, tradicionais do meio rural, mas em consonância com as relações do ambiente, a fim de promover a sustentabilidade. O objetivo desse estudo foi analisar as
Ambient. soc.. Publicado em: 02/12/2019
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24. Um novo ecossistema: florestas urbanas construídas pelo Estado e pelos ativistas
resumo Historicamente, a expansão das cidades resultou na substituição da paisagem natural pela urbana, tendo como consequência a degradação ambiental por meio das mudanças na cobertura do solo, nos sistemas hidrológicos, nos ciclos biogeoquímicos, no clima e na biodiversidade, tornando as cidades especialmente vulneráveis às mudanças climáticas
Estud. av.. Publicado em: 02/12/2019