Consulta: subjectFacets:"Environmental impacts"
Registros recuperados: 28
Data/hora: 17/06/2024 09:56:45

The Social and Environmental Impacts of Biofuel Feedstock Cultivation: Evidence from Multi-Site Research in the Forest Frontier
Provedor de dados: Ecology and Society
Autores: German, Laura; Center for International Forestry Research (CIFOR); L.GERMAN@cgiar.org; Schoneveld , George  C.; Center for International Forestry Research (CIFOR); G.Schoneveld@cgiar.org; Pacheco, Pablo; Center for International Forestry Research (CIFOR); p.pacheco@cgiar.org.
Preoccupation with global energy supplies and climate change in the global North, and a desire to improve the balance of trade and capture value in the emerging carbon market by developing countries, together place biofuels firmly on the map of global land use change. Much of this recent land use change is occurring in developing countries where large agro-ecologically suitable tracts of land may be accessed at lower economic and opportunity cost. This is leading to the gradual penetration of commercial crops that provide suitable biofuel feedstocks (e.g., sugarcane, soybean, oil palm, jatropha) into rural communities and forested landscapes throughout many areas of the global South.   Expansion of biofuel feedstock cultivation in developing countries is...
Tipo: Peer-Reviewed Reports
Palavras-chave: Africa; Biofuels; Environmental impacts; Forest frontier; Latin America; Social impacts; Southeast Asia.
Ano: 2011

Environmental and Social Impacts of Oil Palm Plantations and their Implications for Biofuel Production in Indonesia
Provedor de dados: Ecology and Society
Autores: Obidzinski, Krystof ; Center for International Forestry Research (CIFOR); kobidzinski@cgiar.org; Andriani, Rubeta ; Center for International Forestry Research (CIFOR) ; r.andriani@cgiar.org; Komarudin, Heru; Center for International Forestry Research (CIFOR) ; h.komarudin@cgiar.org; Andrianto, Agus ; Center for International Forestry Research (CIFOR) ; a.andrianto@cgiar.org.
This paper reviews the development of oil palm with linkages to biofuel in Indonesia and analyzes the associated environmental and socioeconomic impacts. We selected three plantation study sites in West Papua (Manokwari), West Kalimantan (Kubu Raya), and Papua (Boven Digoel) to assess the impacts. Research findings indicate that the development of oil palm in all three sites has caused deforestation, resulting in significant secondary external impacts such as water pollution, soil erosion, and air pollution. In terms of social impacts, many stakeholder groups, i.e., employees, out-growers, and investing households, report significant gains. However, we found these benefits were not evenly distributed. Other stakeholders, particularly traditional...
Tipo: Peer-Reviewed Reports
Palavras-chave: Biofuels; Environmental impacts; Oil palm; Socioeconomic benefits.
Ano: 2012

Local Social and Environmental Impacts of Biofuels: Global Comparative Assessment and Implications for Governance
Provedor de dados: Ecology and Society
Autores: German, Laura; Center for International Forestry Research; University of Georgia; L.GERMAN@cgiar.org; Schoneveld , George  C.; Center for International Forestry Research; G.Schoneveld@cgiar.org; Pacheco, Pablo; Center for International Forestry Research; p.pacheco@cgiar.org.
The 2000s witnessed the rapid expansion of biofuel plantations in the global South in the context of a growing trend of crop plantation expansion. This trend has been spurred by policies in the European Union, United States, Brazil, and other countries favoring the use of biofuels in the transport sector to enhance energy security and reduce carbon emissions, as well as by the desire of governments in developing countries to harness the stimulus that new commercial investments provide to the agricultural sector and to national economies. Despite these potential benefits, a number of concerns have been raised about the local social and environmental impacts of biofuel feedstock expansion. We shed light on this debate through a synthesis of findings from...
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Biofuels; Developing countries; Environmental impacts; Global South; Social impacts.
Ano: 2011

Consequências da monocultura de braquiárias e da invasão de cambarazais e algodoais sobre a ictiofauna de alagados no Pantanal.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: ROSA, F. R. da; RESENDE, E. K. de.
As áreas inundáveis do Pantanal são importantes ambientes de alimentação, crescimento e desova para a ictiofauna. A vegetação das áreas inundáveis passa por fortes mudanças, em parte causadas por oscilações naturais do nível hidrológico, em parte ocasionada pelo manejo humano da paisagem. São exemplos dessas mudanças, naturais ou antrópicas, a substituição de campos nativos pela expansão de algodoais (Ipomoea carnea), cambarazais (Vochysia divergens) e pela introdução das forrageiras Brachiaria spp. Avaliamos as consequências dessas substituições sobre a ictiofauna em áreas alagáveis do Pantanal Norte. Comparamos riqueza de espécies, biomassa e abundância das ictiocenoses coletadas em 30 parcelas com 25 m2. Registramos 101 espécies de peixes de variados...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Áreas inundáveis; Impactos ambientais; Peixes; Environmental impacts; Fishes; Flooded areas.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/920837

Combining ecosystem indicators and life cycle assessment for environmental assessment of demersal trawling in Tunisia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Abdou, Khaled; Le Loc'H, Francois; Gascuel, Didier; Romdhane, Mohamed Salah; Aubin, Joel; Ben Rais Lasram, Frida.
Purpose The present study assesses environmental performance of seafood production by demersal trawling in Tunisia (Gulf of Gabes) in order to analyze the contribution of each production stage to environmental impacts and to understand drivers of the impacts using life cycle assessment (LCA). Then a set of ecosystem quality indicators were determined using an ecosystem modeling tool, Ecopath with Ecosim (EwE), and were combined with LCA to increase the relevance of both tools' assessments when applied to fisheries. Methods The approach consisted of conducting LCA and calculating ecosystem indicators to provide a complete assessment of trawling's environmental impacts and the ecosystem characteristics associated with seafood production. The functional unit...
Tipo: Text
Palavras-chave: Life cycle assessment; Fisheries; Ecosystem modeling; Ecopath with Ecosim; Ecospace; Demersal trawling; Environmental impacts; Gulf of Gabes.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00609/72148/70895.pdf

A review of potential impacts of submarine power cables on the marine environment: Knowledge gaps, recommendations and future directions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Taormina, Bastien; Bald, Juan; Want, Andrew; Thouzeau, Gerard; Lejart, Morgane; Desroy, Nicolas; Carlier, Antoine.
Submarine power cables (SPC) have been in use since the mid-19th century, but environmental concerns about them are much more recent. With the development of marine renewable energy technologies, it is vital to understand their potential impacts. The commissioning of SPC may temporarily or permanently impact the marine environment through habitat damage or loss, noise, chemical pollution, heat and electromagnetic field emissions, risk of entanglement, introduction of artificial substrates, and the creation of reserve effects. While growing numbers of scientific publications focus on impacts of the marine energy harnessing devices, data on impacts of associated power connections such as SPC are scarce and knowledge gaps persist. The present study (1)...
Tipo: Text
Palavras-chave: Submarine power cables; Marine renewable energy; Environmental impacts; Ecosystem functioning; Benthic habitats.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56542/58330.pdf

Economic and Environmental Impacts of Improving Growth Rate and Feed Efficiency in Fish Farming Depend on Nitrogen and Density Limitation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Besson, Mathieu; Komen, H; Vandeputte, Marc; Aubin, Joel; De Boer, I J M; Van Arendonk, J A M.
The aim of fish breeding is to increase profit by producing faster growing fish with lower feed intake. However, little is known about the economic and environmental impacts of selective breeding programs for fish. We modelled a fish farm producing African catfish in a Recirculating Aquaculture System (RAS) to calculate economic values of growth rate and feed efficiency with production limited by fish density in rearing tanks and fish nitrogen emission. We also calculated “environmental values” with Life Cycle Assessment. The economic and environmental values of growth rate and feed efficiency depended on the limiting factor. When nitrogen was the limiting factor, economic and environmental values of growth rate were zero. But, on the other hand, feed...
Tipo: Text
Palavras-chave: Economic values; Environmental impacts; Fish farming.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00205/31641/30046.pdf

Ferromanganese nodule fauna in the Tropical North Pacific Ocean: Species richness, faunal cover and spatial distribution
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Veillette, J; Sarrazin, Jozee; Gooday, A; Galeron, Joelle; Caprais, Jean-claude; Vangriesheim, Annick; Etoubleau, Joel; Christian, J; Juniper, S.
The poorly known ferromanganese nodule fauna is a widespread hard substratum community in the deep sea that will be considerably impacted by large-scale nodule mining operations. The objective of this study was to analyze the spatial distribution of the fauna attached to nodules in the Clarion-Clipperton Fracture Zone at two scales; a regional scale that includes the east (14 degrees N, 130 degrees W) and the west (9 degrees N, 150 degrees W) zones and a local scale in which different geological facies (A, B, C and west) are recognizable. The fauna associated with 235 nodules was quantitatively described: 104 nodules from the east zone (15 of facies A, 50 of facies B and 39 of facies C) and 131 nodules from the west zone. Percent cover was used to quantify...
Tipo: Text
Palavras-chave: Environmental impacts; Environmental factors; Geographical distribution; Agglutinated foraminifera; Fixed fauna; Ferromanganese nodules.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3537.pdf

Reproduction of Pimelodus maculatus(Siluriformes: Pimelodidae) in three section of Grande River basin, downstream Porto Colombia dam, south-eastern Brazil
Provedor de dados: Neotropical Ichthyology
Autores: Paschoalini,Alessandro Loureiro; Perini,Violeta da Rocha; Ribeiro,Dirceu Marzulo; Formagio,Paulo Sérgio; Rizzo,Elizete; Bazzoli,Nilo.
The alterations to the hydrologic regime downstream from hydroelectric dams may cause an impact on the reproductive success of fishes. This study aimed to analyse the influence of the physical and chemical parameters of the water of the Grande and Pardo Rivers on gonadal maturation, oocyte diameter, follicular atresia and biological indices of Pimelodus maculatus collected from three river sections: Grande River, downstream from the Porto Colômbia dam (S1), Grande River, downstream from the confluence with the Pardo River (S2) and in the Pardo River channel (S3). Males and females captured in S1 presented significantly higher average values for total length and body weight than those captured in S2 and S3. The gonadosomatic index values were significantly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic factors; Dam impacts; Environmental impacts; Gonadosomatic index.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300615

Unexpected effects of pigeon-peas (Cajanus cajan) in the restoration of rupestrian fields
Provedor de dados: Planta Daninha
Autores: Hilário,R.R; Castro,S.A.B; Ker,F.T.O; Fernandes,G.
Several degraded areas can be found along the Highway MG-010 that crosses the Espinhaço Mountain Biosphere Reserve in the Brazilian state of Minas Gerais. Restoration by planting the legume Cajanus cajan was implemented in some of these areas. The present study compares plant species richness, diversity, abundance, equitability, similarity, and soil composition between restored and non-restored areas, in an attempt to evaluate the effectiveness of the use of C. cajan in the restoration process in the mountain environment. Each treatment (restored and non-restored) had four sampling areas, each with three 300 m² plots. We counted and identified every individual plant found within these plots. We also collected soil from the superficial layer (0-10 cm) of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental impacts; Restoration ecology; Serra do Cipó; Tropical mountains.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582011000400001

Environmental Impacts of Emerging Biomass Feedstock Markets: Energy, Agriculture, and the Farmer
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Dodder,   Rebecca S.; Amani,   Elobeid; Johnson,   Timothy L.; Kaplan,   P. Ozge; Kurkalova,   Lyubov A.; Secchi,   Silvia; Tokgoz,   Simla.
The tighter linkages between energy and crop markets due to recent climate and energy legislation in the US have large potential environmental impacts beyond carbon sequestration and climate mitigation. These range from effects on water quality and quantity, soil erosion, habitat and biodiversity preservation. These impacts are very location and management-decision specific, as they are the product of atomistic decisions and depend on soil and landscape specific variables. In order to fully understand the effects of biomass markets, the new and stronger linkages and feedback effects between national- and global-scale energy and commodity markets must be properly understood and identified using an integrated perspective. We discuss the various interactions...
Tipo: Working Paper
Palavras-chave: Energy and Commodity markets linkages; Integrated energy system assessment; Environmental impacts; Biofuels.; Agricultural and Food Policy; Environmental Economics and Policy; Farm Management; Land Economics/Use; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/118453

Contributions of U.S. Crop Subsidies to Biofuel and Related Markets
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Devadoss,   Stephen; Bayham,   Jude.
The U.S. crop subsidies provide incentives for farmers to expand feedstock production, which benefits the biofuel producers by lowering input costs. This study develops a general equilibrium model to analyze the effects of a reduction in the U.S. crop subsidy on biofuel industries and social welfare. The impacts of feedstock policies on the biofuel market are marginal. In contrast, the biofuel mandate has a larger impact and counteracts the effects of the crop subsidy reduction. The mandate increases the demand for feedstock and causes not only grain ethanol, but also cellulosic ethanol production to rise. The mandate exacerbates the distortion, and government spending increases significantly, leading to greater welfare loss.
Tipo: Journal Article
Palavras-chave: Biofuel; Environmental impacts; Farm supports; Welfare analysis; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Financial Economics; Land Economics/Use; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy; Q18; Q27.
Ano: 2010
URL: http://purl.umn.edu/100525

Incorporating Environmental Impacts in the Measurement of Agricultural Productivity Growth
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Ball,   V. Eldon; Lovell,   C.A. Knox; Luu,   H.; Nehring,   Richard F.
Agricultural production is known to have environmental impacts, both adverse and beneficial, and it is desirable to incorporate at least some of these impacts in an environmentally sensitive productivity index. In this paper, we construct indicators of water contamination from the use of agricultural chemicals. These environmental indicators are merged with data on marketed outputs and purchased inputs to form a state-by-year panel of relative levels of outputs and inputs, including environmental impacts. We do not have prices for these undesirable by products, since they are not marketed. Consequently, we calculate a series of Malmquist productivity indexes, which do not require price information. Our benchmark scenario is a conventional Malmquist...
Tipo: Journal Article
Palavras-chave: Environmental impacts; Productivity growth; Environmental Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/30911

SOCIAL WELFARE AND ENVIRONMENTAL DEGRADATION IN AGRICULTURE:  THE CASE OF ECUADOR
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Segarra,   Eduardo; Torre Ugarte,   Daniel de la; Malaga,   Jaime E.; Williams,   Gary W.
A non-linear optimization model which maximizes total Ecuadorian social welfare, defined as the sum of consumers' and producers' surpluses for the four major crops (corn, bananas, rice and African palm) is developed to evaluate the tradeoff between welfare and environmental degradation in Ecuador.  It was found that a total welfare loss of US$122 million (a 11 percent reduction - from US$ 1.112 billion to US$ 989.66 million) would be expected from a 30 percent reduction in the total pesticide load on the environment in the production of the four major crops.  The distributional impacts of the welfare loss were found, however, to be significantly skewed toward the loss of consumers' surplus.  Specifically, a 30 percent reduction of total pesticide load on...
Tipo: Conference Paper or Presentation
Palavras-chave: Welfare tradeoff; Environmental impacts; Non-linear optimization; Environmental Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/25822

Community Watershed Management in Semi-Arid India: The State of Collective Action and its Effects on Natural Resources and Rural Livelihood
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Shiferaw,   Bekele A.; Kebede,   Tewodros A.; Reddy,   V. Ratna.
Spatial and temporal attributes of watersheds and the associated market failures that accelerate degradation of agricultural and environmental resources require innovative institutional arrangements for coordinating use and management of resources. Effective collective action (CA) allows smallholder farmers to jointly invest in management practices that provide collective benefits in terms of economic and sustainability gains. The Government of India takes integrated watershed management (IWM) as a key strategy for improving productivity and livelihoods in the rain-fed and drought-prone regions. This study investigates the institutional and policy issues that limit effective participation of people in community watershed programs and identifies key...
Tipo: Conference Paper or Presentation
Palavras-chave: Collective action; Institutions; Property rights; Watershed management; Poverty; Environmental impacts; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/44358

The Ethanol Decade:  An Expansion of U.S. Corn Production, 2000-09
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Wallander,   Steven; Claassen,   Roger; Nickerson,   Cynthia J.
The recent 9-billion-gallon increase in corn-based ethanol production, which resulted from a combination of rising gasoline prices and a suite of Federal bioenergy policies, provides evidence of how farmers altered their land-use decisions in response to increased demand for corn. As some forecasts had suggested, corn acreage increased mostly on farms that previously specialized in soybeans. Other farms, however, offset this shift by expanding soybean production. Farm-level data reveal that the simultaneous net expansion of corn and soybean acreage resulted from a reduction in cotton acreage, a shift from uncultivated hay to cropland, and the expansion of double cropping (consecutively producing two crops of either like or unlike commodities on the same...
Tipo: Report
Palavras-chave: Agricultural Resource Management Survey (ARMS); Bioenergy; Ethanol; Indirect effects; Land use; Corn production; Environmental impacts; Environmental Economics and Policy; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2011
URL: http://purl.umn.edu/117982

Nitrous oxide and methane fluxes in south Brazilian gleysol as affected by nitrogen fertilizers
Provedor de dados: Revista Brasileira de Ciência do Solo
Autores: Zanatta,Josiléia Acordi; Bayer,Cimélio; Vieira,Frederico C.B.; Gomes,Juliana; Tomazi,Michely.
Nitrogen fertilizers increase the nitrous oxide (N2O) emission and can reduce the methane (CH4) oxidation from agricultural soils. However, the magnitude of this effect is unknown in Southern Brazilian edaphoclimatic conditions, as well as the potential of different sources of mineral N fertilizers in such an effect. The aim of this study was to investigate the effects of different mineral N sources (urea, ammonium sulphate, calcium nitrate, ammonium nitrate, Uran, controlled- release N fertilizer, and urea with urease inhibitor) on N2O and CH4 fluxes from Gleysol in the South of Brazil (Porto Alegre, RS), in comparison to a control treatment without a N application. The experiment was arranged in a randomized block with three replications, and the N...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen fertilization; Environmental impacts; Agriculture; Greenhouse effect.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000500018

Hydrochemistry of alluvial aquifer in the Cobra River sub-basin
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Lima,Alexandre de O.; Dias,Nildo da S.; Lima Filho,Francisco P.; Ferreira Neto,Miguel; Rego,Priscila R. do A.; Souza,Anderson de M.
ABSTRACT The regional characteristics of waters from alluvial aquifers are different, since they depend on geology and climate. Also, there may be local variation in the quality of the available water when the water source is superficial (rivers and lakes) or is underground due to geology. In order to investigate the groundwater quality of the alluvial aquifer in the Sub-Basin of the Cobra River (RN) for construction of underground dams, five wells, four in the main river and one in the tributary, were monitored in dry and rainy seasons, during two hydrological years. Fifteen water samples from ‘Amazonas’ wells were collected for hydrochemical assessment. Multivariate analysis were performed to evaluate the origin of aquifer recharge and water...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water quality; Salinization; Environmental impacts.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001100785

Cassava wastewater as organic fertilizer in ‘Marandu’ grass pasture
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Bezerra,Márcio G. S.; Silva,Gualter G. C. da; Difante,Gelson dos S.; Emerenciano Neto,João V.; Oliveira,Ermelinda M. M.; Oliveira,Luiz E. C. de.
ABSTRACT This study aimed to evaluate the use of wastewater from the cassava processing as organic fertilizer on pastures of Brachiaria brizantha cv. ‘Marandu’. The treatments were wastewater doses (0, 15, 30, 60 and 120 m3 ha-1), in a randomized block design with four replicates. The structural characteristics and morphological composition of the pastures were evaluated, from July 2013 to January 2014. The addition of wastewater promoted a positive linear increase in the three cuts for the canopy height, light interception and leaf area index. The maximum dry matter (DM) production was obtained with 120 m3 ha-1 of wastewater (2796 kg ha-1 of DM in the second cut). The mass of senescent material in the second and third cuts fitted to positive linear...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria brizantha; Manihot esculenta; Manipueira; Environmental impacts.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000600404

Waste management in production and animal health services
Provedor de dados: Revista de Educação Continuada em Medicina Veterinária e Zootecnia do CRMV-SP
Autores: Polegato, Elma Pereira dos Santos.
Waste disposal has become a worldwide problem in terms of environment damage and pollution. If they are disposed without any treatment, besides the impact and commitment of natural resources there are also great and serious consequences to human and animal health. The Brazilian legislation is generic and can be applied to waste generated in veterinary services, but due to the diversity of animal species and their distinct activities, it is not enough clear. The present paper discuss the main residues generated in animal production in general, with particular interest to animal health care waste and rationalize the information to be attended the current standards with appropriate practices of control, management and environmental adequate disposal of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Residues of animal health services; Environment; Environmental impacts; Residues in animal production resíduos de serviços de saúde animal; Meio ambiente; Impactos ambientais; Resíduos na produção animal.
Ano: 2018
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/37815

Soil organisms in organic and conventional cropping systems
Provedor de dados: Scientia Agricola
Autores: Bettiol,Wagner; Ghini,Raquel; Galvão,José Abrahão Haddad; Ligo,Marcos Antônio Vieira; Mineiro,Jeferson Luiz de Carvalho.
Despite the recent interest in organic agriculture, little research has been carried out in this area. Thus, the objective of this study was to compare, in a dystrophic Ultisol, the effects of organic and conventional agricultures on soil organism populations, for the tomato (Lycopersicum esculentum) and corn (Zea mays) crops. In general, it was found that fungus, bacterium and actinomycet populations counted by the number of colonies in the media, were similar for the two cropping systems. CO2 evolution during the cropping season was higher, up to the double for the organic agriculture system as compared to the conventional. The number of earthworms was about ten times higher in the organic system. There was no difference in the decomposition rate of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil microorganisms; Organic agriculture; Microartropods; Cropping systems; Environmental impacts.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000300023

Impactos do fogo sobre o componente arbustivo-arbóreo de um remanescente de Floresta Ombrófila Aberta, Areia, Estado da Paraíba - DOI: 10.4025/actascibiolsci.v31i4.4522
Provedor de dados: Acta Scientiarum: Biological Sciences
Autores: Xavier, Klerton Rodrigues Forte; Universidade Federal da Paraíba; Andrade, Leonaldo Alves de; Universidade Federal da Paraíba; Coelho, Maria do Socorro Evangelista; Universidade Federal da Paraíba; Assis, Felipe Nollet de Medeiros; Universidade Federal da Paraíba; Fabricante, Juliano Ricardo; Universidade Federal da Paraíba.
O objetivo do presente trabalho foi avaliar os impactos causados pelo fogo sobre o estrato arbustivo-arbóreo de um fragmento de Floresta Atlântica, em Areia, Paraíba. Foram plotadas 40 parcelas de 100 m2 em dois ambientes: floresta intacta (Ambiente I) e floresta queimada (Ambiente II). O presente levantamento incluiu indivíduos com diâmetro ao nível do solo (DNS) ≥ 3 cm, sendo a estrutura da vegetação avaliada por parâmetros convencionais. Calcularam-se, também, os índices de diversidade e de equabilidade, além da similaridade entre os ambientes. Foram amostrados 1.960 indivíduos, pertencentes a 22 famílias, 26 gêneros e 35 espécies. No Ambiente I, Protium heptaphyllum foi a espécie mais abundante e importante; no Ambiente II, sobressaíram-se os...
Tipo: Fitossociologia
Palavras-chave: 2.05.00.00-9 incêndio florestal; Perfilhamento; Impactos ambientais; Floresta serrana 2.05.00.00-9 forest fire; Shoots; Environmental impacts; Mountain forest.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4522

Evaluating water resource maintenance for lakes of the middle Doce river - doi: 10.4025/actascibiolsci.v34i3.8703
Provedor de dados: Acta Scientiarum: Biological Sciences
Autores: Morais, Maíra Moreira; Universidade Federal de Minas Gerais; Miranda, Roberta Ferreira; Universidade Federal de Minas Gerais; Barroso-Silva, Kariny; Centro Universitário do Leste de Minas Gerais – UnilesteMG; Latini, Anderson Oliveira; Universidade Federal de São João Del Rei.
The importance of water resources to mankind and the threat level these resources have withstood due to regional and worldwide human intervention are undeniable. In the middle stretch of the Doce river basin, there are close to 170 natural lakes, located between an environmental conservation area and monoculture eucalyptus plantations, with social, economic and biological importance. Our objective was to evaluate whether the water surface area in these lakes has remained constant in the last few decades, and make inferences on the result. To that end, we measured the water surface area of 16 lakes, from satellite images obtained between May and August in the years 1977, 1979, 1981, 2000 and 2005. Total water surface area was compared considering these...
Palavras-chave: Ecologia de Ecossistemas lakes; Water surface area; Environmental impacts; Remote sensing Ecologia.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8703

Changes in diet of a neotropical cichlid in response to river damming
Provedor de dados: Acta Scientiarum: Biological Sciences
Autores: Jorge, Monica Bueno; Vilela, Maria José Alencar; Suarez, Yzel Rondon; Lima Junior, Sidnei Eduardo.
Changes in diet of Laetacara araguaiae Ottoni and Costa, 2009 were evaluated in the Sucuriú River (Upper Paraná basin, Brazil) in an area with a small hydroelectric power plant, both before and after the formation of the reservoir, in order to answer: Did the construction of the reservoir affected the diet of this species? The results showed greater change of diet composition in the upstream section of the reservoir. It was observed that before the formation of the reservoir and the first year after, the individuals from upstream section formed a group characterized by an insectivorous diet. With the dam construction and habitat change we observed that aquatic plant material, sediment, and algae predominated in the diet. These results show the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.00.00.00-6 aquatic ecology; Environmental impacts; Laetacara araguaiae; Reservoir; Upper Paraná River; Brazil. Ecologia.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/43880

Evaluation of Environmental Effects in Producing Three Main Crops (Corn, Wheat and Soybean) Using Life Cycle Assessment
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: Ghasempour, Atena; ahmadi, ebrahim.
Today, environmental pollution and greenhouse gases emissions are one of the human society challenges which is attracted many countries, scientists and researchers attention. To control and reduce the pollution needed to track the environmental impact during the production of the desired product. Since the world's population is growing, the demand for food has increased. Therefore, the agricultural industry required to appropriate policy management to reduce the environmental impacts for producing the healthier products. LCA approach specifies the environmental impact during the production of the interest product. In addition, three crops of corn, wheat and soybean were announced as ten of world's first listwith universal value. Therefore, producing these...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental impacts; SimaPro; Greenhouse gases; Life cycle assessment; Acidification; Photochemical oxidation.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4687

Ichthyofauna from tributaries of Urubu and Amazonas rivers, Amazonas State, Brazil
Provedor de dados: Biota Neotropica
Autores: Pereira,Rayane da Silva; Silva,Rayanna Graziella Amaral da; Morales,Bruno Ferezim; Souza,Sidney dos Santos; Hinnah,Rafael; Takahashi,Erico Luis Hoshiba; Ota,Rafaela Priscila.
Abstract: The Amazonas River basin comprises the world’s highest fish species diversity. Anthropogenic interferences in aquatic environments represent a pressure over the maintenance of ecological stability and biodiversity. We inventoried the ichthyofauna of 13 disturbed/modified tributaries of Urubu and Amazonas rivers in the region of the middle Amazon River, between June 2018 and March 2019. A total of 164 species were captured, represented by 11 orders, 37 families and 96 genera. Characiformes was the richest order, followed by Cichliformes and Siluriformes. The most representative families in number of species were Cichlidae, Serrasalmidae, and Characidae. Hemigrammus levis was the most abundant species, and Acarichthys heckelii the most common,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon fish; Environmental impacts; Ichthyofauna diversity; Inventory.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032020000200301

Impacts of the construction of the Port of Suape on phytoplankton in the Ipojuca River estuary (Pernambuco-Brazil)
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Koening,Maria Luise; Leça,Enide Eskinazi; Neumann-Leitão,Sigrid; Macêdo,Silvio José de.
In order to address the impact on phytoplankton, sampling was conducted monthly at 4 fixed stations, from April/86 to March/87 at diurnal low and high tide using a plankton net (65 mum mesh size) and a 1 L Van Dorn bottle. Among the 133 taxa identified, marine littoral euryhaline species were most common, outranking Gyrosigma balticum (Ehrenberg) Rabenhorst, Nitzschia sigma (Kützing) Wm. Smith, Licmophora abbreviata Agardh, Climacosphenia moniligera Ehrenberg, Surirella febigerii Lewis, Terpsinoe musica Ehrenberg and Cylindrotheca closterium (Ehrenberg) Reiman and Lewis. The port construction caused significant changes to the phytoplankton community with a strong influence of marine species (mainly dinoflagellate) because of the opening of the reef near...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Phytoplankton; Environmental impacts; Estuary; Suape Port.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000100012

An evaluation of the economic viability of environmental offsets in the saltworks industry
Provedor de dados: Ciência Rural
Autores: Fernandes,Rogério Taygra Vasconcelos; Pinto,Aruza Rayana Morais; Fernandes,Raimunda Thyciana Vasconcelos; Oliveira,Jônnata Fernandes de; Novaes,José Luís Costa.
ABSTRACT: The extraction of sea salt depends on the occupation of large areas at the estuary banks, many of them inserted in Permanent Preservation Areas (PPAs). Thus, the objective was to evaluate the economic viability of Environmental Offsets (EO) as an alternative to the unoccupied PPAs in the saltworks. In order to do so, 27 solar saltworks installed in the region of the Brazilian White Coast were evaluated for the occupation of PPAs - measured using images from satellite, georeferenced, vectored with corresponding PPA bands generated - and estimated to EO (Impact Degree x Sum of the investments necessary to implement the project) and Economic Impact (Net Present Value, with long-term interest rate of 7%) of vacating PPAs. It was considered that EO...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Economic impact; Environmental impacts; Ecosystem services; Mangroves; Permanent preservation areas.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000500401