Produção Nacional
Revisado por pares
Ana Silvia Rolon, Leonardo Maltchik,
Abstract Question: Does flooding of rice fields after cultivation contribute to wetland plant conservation in southern Brazil? Location: Rice fields in the coastal plain of southern Brazil. Methods: Six rice fields with different management practices were randomly selected (three dry rice fields and three flooded rice fields). Six collections were carried out over the rice cultivation cycle. Richness and biomass were measured using the quadrat method. Results: A total of 88 macrophyte species was ...
Tópico(s): Biological Control of Invasive Species
2009 - Wiley | Applied Vegetation Science
Produção Nacional
Revisado por pares
Ana Silvia Rolon, Leonardo Maltchik,
Tópico(s): Biological Control of Invasive Species
2005 - Springer Science+Business Media | Hydrobiologia
Produção Nacional
Revisado por pares
Maria G. Linke, Robson Souza Godoy, Ana Silvia Rolon, Leonardo Maltchik,
Abstract Questions Are organic rice crops better than convention crops for aquatic plant conservation? We tested three hypotheses: (1) richness, diversity and biomass of aquatic macrophytes are higher in organic rice fields than in conventional ones; (2) aquatic macrophyte species composition in organic rice fields is more similar to that of natural wetlands than to conventional rice fields; and (3) aquatic macrophyte richness, diversity, biomass and species composition in natural wetlands will differ ...
Tópico(s): Constructed Wetlands for Wastewater Treatment
2014 - Wiley | Applied Vegetation Science
Produção Nacional
Revisado por pares
Aline B. Moraes, Cristina Stenert, Ana Silvia Rolon, Leonardo Maltchik,
Ponds represent discrete sites surrounded by a terrestrial landscape that is inhospitable for aquatic macroinvertebrates. Such ecosystems are appropriate for testing the influence of area, isolation, and correlated variables such as habitat diversity and hydroperiod, on aquatic macroinvertebrate communities. We tested three hypotheses in natural and non-impacted ponds located in a matrix of coastal dunes without human interference in southern Brazil: (1) area, habitat diversity, and hydroperiod increase ...
Tópico(s): Marine Biology and Ecology Research
2014 - Taylor & Francis | Journal of Freshwater Ecology
Produção Nacional
Revisado por pares
Ana Silvia Rolon, Taís Lacerda, Leonardo Maltchik, Demétrio Luís Guadagnin,
Abstract Questions: Two hypotheses were tested: (1) physical features, such as wetland surface area and habitat diversity, together with water chemistry, are important determinants of species richness and composition of macrophyte assemblages and (2) species richness and composition of macrophyte assemblages differ between wetlands of different types (i.e., palustrine versus lacustrine) and between wetlands of different hydrologies (i.e. permanent versus intermittent). Location: A subtropical coastal ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2008 - Wiley | Journal of Vegetation Science
Produção Nacional
Revisado por pares
Ana Silvia Rolon, Odete Rocha, Leonardo Maltchik,
Tópico(s): Hydrology and Sediment Transport Processes
2011 - Springer Science+Business Media | Hydrobiologia
Produção Nacional
Revisado por pares
Demétrio Luís Guadagnin, Ângela Schmitz Peter, Ana Silvia Rolon, Cristina Stenert, Leonardo Maltchik,
Use of rice fields as complementary habitats to waterbird species was investigated. Three questions were posed (1) does waterbird richness (defined as number of species), abundance and composition differ between rice fields and natural wetlands; (2) do richness, abundance and composition of waterbird species differ between flooded and drained rice fields in the post-harvest season, and (3) do richness, abundance and composition of waterbird species change in rice fields over the rice cultivation cycle? ...
Tópico(s): Wildlife Ecology and Conservation
2012 - The Waterbird Society | Waterbirds
Produção Nacional
Revisado por pares
Luis Esteban Krause Lanés, Ana Silvia Rolon, Cristina Stenert, Leonardo Maltchik,
Two hypotheses were tested: that the artificial sandbar opening decreases the richness, diversity and abundance of fishes and alters the fish composition in floodplain ponds; that the salinity variations influence fish richness, diversity, abundance, as well as composition. Results suggest that artificial sandbar openings did not reduce the richness or diversity of freshwater fishes in southern Brazil floodplain ponds. Nevertheless, this process causes an increase in salinity, which determines significant ...
Tópico(s): Fish Ecology and Management Studies
2015 - Wiley | Journal of Applied Ichthyology
Produção Nacional
Revisado por pares
Ana Silvia Rolon, Odete Rocha, Leonardo Maltchik,
Tópico(s): Hydrology and Sediment Transport Processes
2012 - Elsevier BV | Aquatic Botany
Produção Nacional
Revisado por pares
Ana Silvia Rolon, Henrique Flores Homem, Leonardo Maltchik,
Aim: This study gathers the main results obtained from studies regarding dynamic of aquatic macrophyte community in natural and managed wetlands of Southern Brazil.We analyzed the aquatic macrophytes diversity in wetlands of Southern Brazil, the environmental factors that determine the structure of the aquatic macrophyte community in fragmented wetlands, the effects of floods on the dynamics of macrophytes, and the contributions to the rice field for the conservation of aquatic macrophytes; Methods: ...
Tópico(s): Coastal wetland ecosystem dynamics
2010 - Associação Brasileira de Limnologia | Acta Limnologica Brasiliensia
Produção Nacional
Revisado por pares
Ana Silvia Rolon, Henrique Flores Homem, Leonardo Maltchik,
AIM: This study gathers the main results obtained from studies regarding dynamic of aquatic macrophyte community in natural and managed wetlands of Southern Brazil. We analyzed the aquatic macrophytes diversity in wetlands of Southern Brazil, the environmental factors that determine the structure of the aquatic macrophyte community in fragmented wetlands, the effects of floods on the dynamics of macrophytes, and the contributions to the rice field for the conservation of aquatic macrophytes; METHODS: ...
Tópico(s): Constructed Wetlands for Wastewater Treatment
2010 - Associação Brasileira de Limnologia | Acta Limnologica Brasiliensia
Produção Nacional
Revisado por pares
Ana Silvia Rolon, Odete Rocha, Leonardo Maltchik,
Floristic surveys are significant tools to get to know species diversity and distribution. Little is known about the diversity of aquatic macrophytes in the palustrine wetlands of the Lagoa do Peixe National Park. The goal of this study was to survey aquatic macrophytes in the park wetlands. It identified 176 aquatic macrophyte species distributed in 98 genera and 44 families. Families with the largest number of species included Cyperaceae, Poaceae, Juncaceae, and Asteraceae. The most diverse genera ...
Tópico(s): Coastal wetland ecosystem dynamics
2011 - UNIVERSIDADE DO VALE DO RIO DOS SINOS | Neotropical Biology and Conservation
Patrícia Schott, Ana Silvia Rolon, Leonardo Maltchik,
Tópico(s): Coastal wetland ecosystem dynamics
2005 - Taylor & Francis | SIL Proceedings 1922-2010
Produção Nacional
Friedrich W. Keppeler, Luis Esteban Krause Lanés, Ana Silvia Rolon, Cristina Stenert, Leonardo Maltchik,
Abstract Studies with annual fish diet have shown that the generalist habit is a dominant strategy within this group. Cynopoecilus fulgens (Cyprinodontiformes: Rivulidae) is a restricted range species, endemic to a small area in Southern Brazil, and aspects of its biology and ecology are poorly known. The main goal of the study was to determine the diet of C. fulgens throughout its life cycle and compare it with the prey availability in Southern Brazil wetlands. Specifically, we analyzed samples ...
Tópico(s): Fish Ecology and Management Studies
2013 - Taylor & Francis | Italian Journal of Zoology
Álvaro Junior Caicedo Rolón, Leonardo Rivera,
Emergency medical service (EMS) systems play a fundamental role in society by providing a vital service in initial emergency care. The purpose of this research is to present the first literature review of hospital selection operational decision within the context of the EMS system. The main findings were the following: The hospital selection problem is integrated with the location, dispatch, routing, and size of the ambulance fleet. The main selection criteria were closeness, hospital care capacities ...
Tópico(s): Trauma and Emergency Care Studies
2021 - | Gerencia y Políticas de Salud
Produção Nacional
Revisado por pares
Leonardo Maltchik, Ana Silvia Rolon, Cristina Stenert,
Wetlands are important sites for biological conservation because they support rich biodiversity and present high productivity. Species-area relationship is an important tool in conservation planning and it has been extensively used for wetland management. This study had as aims: (1) to analyse macrophyte and macroinvertebrate diversity in the fragmented wetlands of the Sinos River basin; and (2) to investigate whether wetland areas could work as a tool for selecting the important habitats for biodiversity ...
Tópico(s): Freshwater macroinvertebrate diversity and ecology
2010 - Instituto Internacional de Ecologia (Brazil) | Brazilian Journal of Biology
Produção Nacional
Revisado por pares
Leonardo Maltchik, Ana Silvia Rolon, Patrícia Schott,
Tópico(s): Hydrology and Sediment Transport Processes
2007 - Springer Science+Business Media | Limnology
Produção Nacional
Revisado por pares
Leonardo Maltchik, Ana Silvia Rolon, Cristina Stenert, Iberê Farina Machado, Odete Rocha,
La conservación de especies en los agroecosistemas ha llamado la atención. Los canales de riego pueden mejorar los hábitats y ofrecer condiciones para la conservación de especies de agua dulce. Desde el punto de vista de conservación de la biodiversidad surgen dos preguntas: 1) ¿Pueden los canales de riego mantener una rica diversidad de vegetación acuática, invertebrados y anfibios en el ciclo de cultivo del arroz? 2) ¿Puede la riqueza, abundancia y composición de especies acuáticas cambiar durante ...
Tópico(s): Fish biology, ecology, and behavior
2018 - Vicerractoría Investigación | Revista de Biología Tropical
Produção Nacional
Revisado por pares
Friedrich W. Keppeler, Luis Esteban Krause Lanés, Ana Silvia Rolon, Cristina Stenert, Pablo César Lehmann Albornoz, Martin Reichard, Leonardo Maltchik,
Abstract Annual fishes, which inhabit temporary pools with extremely limited habitat complexity and niche availability, display remarkable sexual dimorphism, rapid growth, and enormous investment into reproduction, all traits associated with high energy requirement. This study tests three hypotheses for two syntopic annual fishes ( A ustrolebias minuano and C ynopoecilus fulgens ) found in six wetlands of southern B razil: (i) considerable morphological differences result in low dietary overlap, (ii) ...
Tópico(s): Fish Biology and Ecology Studies
2014 - Wiley | Ecology Of Freshwater Fish
R.E. Rolón, Luis D. Larrateguy, Leandro E. Di Persia, Rubén D. Spies, Hugo Leonardo Rufiner,
The obstructive sleep apnea–hypopnea (OSAH) syndrome is a very common and generally undiagnosed sleep disorder. It is caused by repeated events of partial or total obstruction of the upper airway while sleeping. This work introduces two novel approaches called most dicriminative activation selection (MDAS) and most discriminative column selection (MDCS) for the detection of apnea–hypopnea events using only pulse oximetry signals. These approaches use discriminative information of sparse representations ...
Tópico(s): Cardiovascular Health and Disease Prevention
2017 - Elsevier BV | Biomedical Signal Processing and Control
Produção Nacional
Revisado por pares
Ana Silvia Rolon, Odete Rocha, Leonardo Maltchik,
The Lagoa do Peixe has its connection with the sea artificially opened every year at the end of winter. However, this management has been carried out without the evaluation of the impact of this opening in the aquatic biodiversity. This information is crucial for the management of the natural resources of the Lagoa do Peixe National Park, the unique Ramsar site in Southern Brazil. The following questions were analyzed: (1) Do richness and composition of aquatic macrophytes from Lagoa do Peixe floodplain ...
Tópico(s): Geography and Environmental Studies
2013 - Vicerractoría Investigación | Revista de Biología Tropical
R.E. Rolón, Iván Gareis, Luis D. Larrateguy, Leandro E. Di Persia, Rubén D. Spies, Hugo Leonardo Rufiner,
The obstructive sleep apnea-hypopnea (OSAH) syndrome is a common and frequently undiagnosed sleep disorder. It is characterized by repeated events of partial (hypopnea) or total (apnea) obstruction of the upper airway while sleeping. To quantify the severity of the pathology, the Apnea Hypopnea Index (AHI) is used. This index is defined as the average number of apnea and hypopnea events per hour of sleep. Discriminating between these two types of events is a very challenging task and in fact most traditional ...
Tópico(s): Voice and Speech Disorders
2020 - Elsevier BV | Biomedical Signal Processing and Control
Leonardo Maltchik, Gislaine Roberto de Oliveira, Ana Silvia Rolon, Cristina Stenert,
SUMMARY The floodplain systems are important wetland classes in southern Brazil, but studies about the effects of flood pulses on the biota are still scarce. The purpose of this study was to analyze and compare the effects of floods on the richness, biomass and diversity of macrophytes in three shallow lakes over an annual cycle (2001-2002) under different flooding regimes. The number of flood events was different among the three studied shallow lakes. The lowest resistance to disturbance by flood ...
Tópico(s): Soil erosion and sediment transport
2005 - Associação Interciencia | Interciencia
Produção Nacional
Revisado por pares
Guilherme Garcez Cunha, Cristina Stenert, Ana Silvia Rolon, Cláudio Mário Mundstock, Leonardo Maltchik,
Tópico(s): Ecology and Vegetation Dynamics Studies
2015 - Springer Science+Business Media | Wetlands Ecology and Management
Produção Nacional
Revisado por pares
Ana Silvia Rolon, Robson Souza Godoy, Leonardo Maltchik,
Recent studies indicate that rice fields contribute to the conservation of aquatic plants, however, repeated cultivation can reduce the species diversity harbored by rice fields. Repeated tillage, agrochemical application and environmental homogeneity can reduce plant diversity and select for species more tolerant to disturbance. Our hypotheses were: 1) macrophyte richness and biomass decrease with increased rice crop age; and 2) macrophyte species of rice fields are a subsample of natural wetlands ...
Tópico(s): Ecology and Conservation Studies
2017 - Instituto Internacional de Ecologia (Brazil) | Brazilian Journal of Biology
Leonardo Maltchik, Marina Schmidt Dalzochio, Cristina Stenert, Ana Silvia Rolon,
The selection of priority areas is an enormous challenge for biodiversity conservation. Some biogeographic methods have been used to identify the priority areas to conservation, and panbiogeography is one of them. This study aimed at the utilization of panbiogeographic tools, to identify the distribution patterns of aquatic insect genera, in wetland systems of an extensive area in the Neotropical region (~280 000km2), and to compare the distribution of the biogeographic units identified by the aquatic ...
Tópico(s): Species Distribution and Climate Change
2012 - Vicerractoría Investigación | Revista de Biología Tropical
Edwin R. Caballero‐Agosto, Nobel O. Sierra-Vega, Yashira Rolon-Ocasio, Samuel P. Hernández‐Rivera, Ricardo A. Infante-Degró, Miriam Fontalvo Gómez, Leonardo C. Pacheco‐Londoño, Ricardo Infante‐Castillo,
Adulterating foods, such as milk powder (MP), is a common practice in countries with no rigid policy on food quality control. This study employs Fourier transform near-infrared and mid-infrared (FT-NIR, FT-MIR) spectroscopy and chemometric analysis to detect milk powder adulteration with corn starch (CS) and wheat flour (WF) from 0.00 to 30.00% w/w concentrations. Partial least square regression (PLSR) models were developed, optimized, and compared to quantify corn starch and wheat flour adulterations. ...
Tópico(s): Spectroscopy Techniques in Biomedical and Chemical Research
2023 - Elsevier BV | Food Chemistry Advances
Manuel Méndez Pinzón, Adela Margarita Vélez Rolón, Román Leonardo Villarreal Ramos, Marcela Gómez Osorio,
Incluir la sostenibilidad en la estrategia de negocios en las Mipymes (Micro, pequeñas y medianas empresas) se convierte en un reto, más allá de los mecanismos que deben ser abordados para su implementación y es un tema aún poco explorado. Este artículo se centra en analizar las implicaciones financieras que representan para las mipymes incurrir en la implementación de propuestas de Valor compartido en sus organizaciones. La evidencia empírica y de validación de la hipótesis, se realizó mediante ...
Tópico(s): Diverse Applied Research Studies
2022 - University of Zulia | Revista Venezolana de Gerencia
Produção Nacional
Revisado por pares
Cinthya Correa, Óscar González-Ramella, Helen Baldomero, Ana Lisa Basquiera, Rosio Baena, Leonardo Javier Arcuri, Bárbara Puga, Carmen Rosales, Marlene Chávez, Calixto Hernández Cruz, Bella Maldonado, Andrés Gómez‐De León, Ninotchka Mendoza, Cristóbal Frutos, Lourdes Aranda, Lilián Díaz, Marcos Hernández, Adriana Seber, Amado Karduss, Gregorio Jaimovich, Juliana Martínez-Rolón, Carmem Bonfim, Hildegard Greinix, Mickey Koh, Mahmoud Aljurf, Minako Iida, Wael Saber, Dietger Niederwieser, Yoshiko Atsuta, Sebastián Galeano, Cinthya Correa, Óscar González-Ramella, Helen Baldomero, Ana Lisa Basquiera, Rosio Baena, Leonardo Javier Arcuri, Bárbara Puga, Carmen Rosales, Marlene Chávez, Calixto Hernández Cruz, Bella Maldonado, Andrés Gómez‐De León, Ninotchka Mendoza, Cristóbal Frutos, Lourdes Aranda, Lilián Díaz, Marcos Hernández, Adriana Seber, Amado Karduss, Gregorio Jaimovich, Juliana Martínez-Rolón, Carmem Bonfim, Sebastián Galeano, Hildegard Greinix, Mickey Koh, Mahmoud Aljurf, Minako Iida, Wael Saber, Dietger Niederwieser, Yoshiko Atsuta,
Tópico(s): T-cell and B-cell Immunology
2022 - Springer Nature | Bone Marrow Transplantation
Alvaro Jr Caicedo-Rolón, Leonardo Rivera, David Claudio,
We designed a decision model for hospital selection in the emergency medical system, which integrates its actors, such as the dispatch center, emergency medical services (EMS), and emergency departments (ED). We designed and simulated the model using colored Petri nets to evaluate two policies: the nearest hospital policy (in time) and the proposed policy that integrates the proximity criteria and ED congestion. The simulation results for the Massachusetts Region 3 case study indicate that the proposed ...
Tópico(s): Healthcare Operations and Scheduling Optimization
2024 - Taylor & Francis | IISE Transactions on Healthcare Systems Engineering