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Assessing the Performance of Natural Resource Systems Ecology and Society
Campbell, Bruce; Center for International Forestry Research (CIFOR); b.campbell@cgiar.org; Sayer, Jeffrey A; WWF (World Wildlife Fund); jsayer@wwfint.org; Frost, Peter; Institute of Environmental Studies; pfrost@compcentre.uz.ac.zw; Vermeulen, Sonja; International Institute for Environment and Development; sonja.vermeulen@iied.org; Cunningham, Tony; World Wildlife Fund/UNESCO/Kew People and Plants Initiative; peopleplants@bigpond.com; Prabhu, Ravi; CIFOR Regional Office; r.prabhu@cgiar.org.
Assessing the performance of management is central to natural resource management, in terms of improving the efficiency of interventions in an adaptive-learning cycle. This is not simple, given that such systems generally have multiple scales of interaction and response; high frequency of nonlinearity, uncertainty, and time lags; multiple stakeholders with contrasting objectives; and a high degree of context specificity. The importance of bounding the problem and preparing a conceptual model of the system is highlighted. We suggest that the capital assets approach to livelihoods may be an appropriate organizing principle for the selection of indicators of system performance. In this approach, five capital assets are recognized: physical, financial, social,...
Tipo: Peer-Reviewed Reports Palavras-chave: Capital assets; Conceptual models; Decision support; Livelihoods; Modeling; Multivariate statistics; Natural resource systems; Performance; Zimbabwe.
Ano: 2001
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Assessment of the water quality in a large reservoir in semiarid region of Brazil AGRIAMBI
Lopes,Fernando B.; Andrade,Eunice M. de; Meireles,Ana C. M.; Becker,Helena; Batista,Adriana A..
The aim of this study was to identify spatial and temporal variations in water quality of Orós reservoir, Ceará, Brazil, as well as the sources of contamination. To get this information the Principal Component Analysis (PCA) and Cluster Analysis (CA) was used. Water samples were collected at seven (geo-referenced) points, from April 2008 to March 2011, totalling 4,032 samples. The following attributes of the waters were analysed: temperature, pH, CE, Ca2+, Mg2+, Na+, K+, Cl-, HCO3-, SO4--, turbidity, colour, Sechi transparency, TS, TVS, TFS, TSS, VSS, FSS, TDS, DO, BO5D, total phosphorus, soluble orthophosphate, EC, TTC, total ammonia, TKN, nitrate, SAR and chlorophyll-a. The PCA promoted the reduction from the 32 initial variables to 14, accounting for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water quality; Water pollution; Multivariate statistics.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014000400012
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Avaliação do uso e situação das pastagens no Bioma Pantanal por meio de gráficos Triplot. Repositório Alice
ABREU, U. G. P. de; SANTOS, S. A.; BARIONI, L. G.; OLIVEIRA, O. C. de.
A presença dominante de campo nativo favoreceu migrações inter-regionais para a criação de fazendas no Pantanal. As pastagens nativas no bioma Pantanal são os principais recursos naturais que a região possui para a manutenção e desenvolvimento da pecuária de corte extensiva. Foram construídas as planilhas de dados com as áreas totais por municípios das pastagens nativas (pn), pastagens cultivadas (pc), pastagens degradadas (pdeg) e áreas de reserva legal (ReserL). A partir desses dados foram construídos gráficos Triplot, método multivariado exploratório desenvolvido para tabelas de contingência com três colunas, geralmente com dados caracterizados como proporções. A presença de pastagens cultivadas foram marcantes nos municípios do Mato Grosso em função de...
Tipo: Separatas Palavras-chave: Municípios; Estatística multivariada; Análise exploratória; Tipologia; Municipalities; Multivariate statistics; Exploratory analysis; Typology.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/868243
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Bioactive compounds in and antioxidant activity of camu-camu fruits harvested at different maturation stages during postharvest storage. Repositório Alice
GRIGIO, M. L.; MOURA, E. A. de; CHAGAS, E. A.; DURIGAN, M. F. B.; CHAGAS, P. C.; CARVALHO, G. F. de; ZANCHETTA, J. J..
The present study was carried out to evaluate the antioxidant activity of and the content of bioactive compounds in camu-camu fruits harvested at different maturation stages and stored. The fruits were harvested in the municipality of Cantá, Roraima State, Brazil. The experimental design was completely randomized, with three replications, in a factorial arrangement consisting of three different maturation stages (immature, semi-mature and mature) and eight days of storage (3 x 8). The fruits were analysed every day regarding total vitamin C, carotenoids, anthocyanins, flavonoids, total phenolic compounds, and antioxidant activity (FRAP and DPPH). According to the results obtained, the interaction of maturation stages x eight days of storage had a...
Tipo: Artigo de periódico Palavras-chave: Biocompounds; Multivariate statistics; Myrciaria Dubia; Anthocyanins; Phenolic compounds.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139455
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Brand Information Mitigating Negative Shocks on Animal Welfare: Is It More Effective to “Distract” Consumers or Make Them Aware? AgEcon
Dentoni, Domenico; Tonsor, Glynn T.; Calantone, Roger J.; Peterson, H. Christopher.
To create and sustain a competitive advantage in markets that increasingly value animal welfare attributes, meat companies need to meet public and private production standards while communicating to final consumers through their brands. Data are collected from a representative sample of 460 U.S. residents through an on-line experiment on McDonald’s chicken breast sandwiches and analyzed with Latent Growth Modeling. This study assesses which content of positive brand information effectively mitigates the risk of negative information shocks on animal welfare. On average, brand information has the same positive impact on consumers’ beliefs and attitudes, regardless of whether it is related or unrelated to animal welfare. However, there is strong market...
Tipo: Journal Article Palavras-chave: Animal welfare; Brand; Information; Consumer behavior; Multivariate statistics; Agribusiness; Livestock Production/Industries; Q1.
Ano: 2010 URL: http://purl.umn.edu/96337
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Longitudinal data assessment of global stability index in kale leaves Scientia Agricola
Azevedo,Alcinei Mistico; Andrade Júnior,Valter Carvalho de; Pedrosa,Carlos Enrrik; Valadares,Nermy Ribeiro; Ferreira,Marcos Aurélio Miranda; Cecon,Paulo Roberto.
ABSTRACT Kale plants are usually sold “in natura” in street markets and malls. Kale leaves can have their appearance compromised by dehydration and discoloration due to increased post-harvest time exposure. We aimed to analyze the Global Stability Index (GSI) in kale accessions by means of repeated measurement analysis and curve grouping as a complementary form of superior sample identification with regard to post-harvest preservation. Thirty kale accessions were evaluated using a randomized block design with four blocks and five plants per plot. Two commercial leaves per plant were collected, and kept on workbenches in the shade at a temperature of 18 ± 1 °C. Subsequently, the degrees of discoloration and dehydration, total chlorophyll content, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brassica oleracea var. acephala DC; Post-harvest preservation; Repeated measurements; Multivariate statistics; Curve grouping.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000100079
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MERCURY IN THE SEDIMENT OF PELOTAS RIVER BASIN, BRAZIL REA
Remor,Marcelo B.; Sampaio,Silvio C.; Model,Kathleen J.; Falco,Thais D.; Prudente,Victor H. R..
ABSTRACT Many studies have determined the concentration of trace elements in river sediments in Brazil. Notwithstanding, mercury assessments are scarce, especially because of exclusive extraction techniques and expensive analysis techniques. Still, this element is known for its toxicity, persistence, and bioaccumulation, making its presence in the environment an important factor for biota and human health. For this reason, the objective of this study was to determine the mercury concentration in the sediment of the Pelotas River basin, located on the border of the states of Santa Catarina and Rio Grande do Sul. The sediment was collected at eight locations of the Pelotas basin and, after drying, the mercury was quantified by atomic absorption spectrometry...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metal; Trace element; Multivariate statistics.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000100117
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Quality pattern evaluation of frozen soursop pulps: an assessment based on chemical composition and chemometric analysis Ciênc. Tecnol. Aliment.
NASCIMENTO,Madson Moreira; JESUS,Raildo Mota de; SANTOS,Herick Macedo; SILVA JUNIOR,André Luiz Sampaio da; CAMPOS,Nícolas Mateus Cosme Oliveira; SILVA,Erik Galvão Paranhos da; LÔBO,Ivon Pinheiro.
Abstract In the present study, the physicochemical properties and mineral composition of commercially-frozen soursop pulps from the southern region of the state of Bahia, Brazil, were evaluated. The physicochemical parameters such as soluble solids (°Brix), acidity and pH were determined according to reference methodologies. For mineral composition evaluation, samples were digested in a closed microwave system and the elements K, P, S, Ca, Mg, Fe, Cu, Zn, and Mn were quantified through inductively coupled plasma optical emission spectrometry (ICP OES). Soluble solids content ranged from 4.77 to 15.37 °Brix among the different brands of analyzed frozen pulps. Titratable acidity (equivalent to citric acid) and pH ranged from 0.49 to 1.00 and 3.61 to 4.57,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Annona muricata L.; Frozen soursop pulp; Physicochemical properties; Essential elements; Multivariate statistics; Principal component analysis.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612020000200508
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Quality pattern evaluation of frozen soursop pulps: an assessment based on chemical composition and chemometric analysis Ciênc. Tecnol. Aliment.
NASCIMENTO,Madson Moreira; JESUS,Raildo Mota de; SANTOS,Herick Macedo; SILVA JUNIOR,André Luiz Sampaio da; CAMPOS,Nícolas Mateus Cosme Oliveira; SILVA,Erik Galvão Paranhos da; LÔBO,Ivon Pinheiro.
Abstract In the present study, the physicochemical properties and mineral composition of commercially-frozen soursop pulps from the southern region of the state of Bahia, Brazil, were evaluated. The physicochemical parameters such as soluble solids (°Brix), acidity and pH were determined according to reference methodologies. For mineral composition evaluation, samples were digested in a closed microwave system and the elements K, P, S, Ca, Mg, Fe, Cu, Zn, and Mn were quantified through inductively coupled plasma optical emission spectrometry (ICP OES). Soluble solids content ranged from 4.77 to 15.37 °Brix among the different brands of analyzed frozen pulps. Titratable acidity (equivalent to citric acid) and pH ranged from 0.49 to 1.00 and 3.61 to 4.57,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Annona muricata L.; Frozen soursop pulp; Physicochemical properties; Essential elements; Multivariate statistics; Principal component analysis.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019005000302
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Use of multivariate approaches in biomass energy plantation harvesting: logistics advantages CIGR Journal
Costa, Corrado; Sperandio, Giulio; Verani, Stefano.
Agricultural biomass supply chain consisting of multiple harvesting, storage, pre-processing, and transport operations.  This network operates in space and time coordinates and produces empirical data used for many purposes, including wood-flow planning, harvesting cost calculation and work rate setting.  The aim of this study was to explore and propose the use of a multivariate approach, namely, the Partial Least Squares (PLS) multivariate regression approach and compare its performance with the commonly used Ordinary Linear Regression (OLS).  In particular, the study aimed at comparing the main statistical significance of indicators attributed to models calculated with OLS and PLS regressions from the same original datasets, for the purpose of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Harvesting; Biomass; Logistics; Machine costs; Multivariate statistics; Ordinary linear regression; Partial least square.
Ano: 2014 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2910
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