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Publisher: SciELO   (Total: 703 journals)

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Showing 1 - 200 of 703 Journals sorted alphabetically
ABCD. Arquivos Brasileiros de Cirurgia Digestiva     Open Access   (Followers: 2, SJR: 0.207, CiteScore: 1)
Acta Agronómica     Open Access  
Acta Amazonica     Open Access   (Followers: 6, SJR: 0.36, CiteScore: 1)
Acta Bioethica     Open Access   (SJR: 0.196, CiteScore: 0)
Acta Botanica Brasilica     Open Access   (Followers: 3, SJR: 0.325, CiteScore: 1)
Acta botánica mexicana     Open Access   (Followers: 1, SJR: 0.212, CiteScore: 0)
Acta Cirurgica Brasileira     Open Access   (SJR: 0.395, CiteScore: 1)
Acta Limnologica Brasiliensia     Open Access   (Followers: 4, SJR: 0.28, CiteScore: 1)
Acta Literaria     Open Access   (Followers: 5, SJR: 0.1, CiteScore: 0)
Acta Medica Colombiana     Open Access   (Followers: 1)
Acta Médica Costarricense     Open Access   (Followers: 2)
Acta Neurológica Colombiana     Open Access   (Followers: 2)
Acta Ortopédica Brasileira     Open Access   (Followers: 1, SJR: 0.343, CiteScore: 1)
Acta Paulista de Enfermagem     Open Access   (Followers: 2, SJR: 0.275, CiteScore: 1)
Acta Pediátrica Costarricense     Open Access   (Followers: 1)
Acta Scientiarum. Agronomy     Open Access   (Followers: 6, SJR: 0.431, CiteScore: 1)
Acta zoológica mexicana     Open Access  
Actualidades Biológicas     Open Access   (Followers: 1)
African Human Rights Law J.     Open Access   (Followers: 17)
African Natural History     Open Access   (Followers: 2, SJR: 0.198, CiteScore: 1)
Afro-Asia     Open Access  
Ágora - studies in psychoanalytic theory     Open Access   (Followers: 3, SJR: 0.132, CiteScore: 0)
Agricultura Tecnica     Open Access   (Followers: 5)
Agrociencia     Open Access   (Followers: 1, SJR: 0.2, CiteScore: 0)
Agrociencia Uruguay     Open Access  
Agronomía Mesoamericana     Open Access  
Aisthesis     Open Access   (Followers: 7, SJR: 0.106, CiteScore: 0)
Alea : Estudos Neolatinos     Open Access   (Followers: 2, SJR: 0.1, CiteScore: 0)
Alfa : Revista de Linguística     Open Access  
Alpha (Osorno)     Open Access   (SJR: 0.138, CiteScore: 0)
Ambiente & sociedade     Open Access   (Followers: 3, SJR: 0.235, CiteScore: 0)
Ambiente & Agua : An Interdisciplinary J. of Applied Science     Open Access   (Followers: 1, SJR: 0.263, CiteScore: 1)
Ambiente Construído     Open Access   (Followers: 1)
América Latina en la historia económica     Open Access   (Followers: 4, SJR: 0.134, CiteScore: 0)
Anais Brasileiros de Dermatologia     Open Access   (Followers: 3, SJR: 0.52, CiteScore: 1)
Anais da Academia Brasileira de Ciências     Open Access   (Followers: 2, SJR: 0.418, CiteScore: 1)
Anais do Museu Paulista : História e Cultura Material     Open Access  
Anales de Medicina Interna     Open Access   (Followers: 1)
Anales del Instituto de la Patagonia     Open Access  
Anales del Sistema Sanitario de Navarra     Open Access   (Followers: 1, SJR: 0.157, CiteScore: 0)
Análise Psicológica     Open Access   (Followers: 1, SJR: 0.16, CiteScore: 0)
Análise Social     Open Access   (Followers: 3, SJR: 0.16, CiteScore: 0)
Andean geology     Open Access   (Followers: 9, SJR: 0.674, CiteScore: 1)
Antipoda. Revista de Antropología y Arqueología     Open Access   (Followers: 5, SJR: 0.135, CiteScore: 0)
Anuario Colombiano de Historia Social y de la Cultura     Open Access   (SJR: 0.1, CiteScore: 0)
Anuario de Historia Regional y de las Fronteras     Open Access  
Apuntes : Revista de Estudios sobre Patrimonio Cultural - J. of Cultural Heritage Studies     Open Access   (Followers: 6)
Archivos de Medicina Veterinaria     Open Access   (Followers: 1, SJR: 0.194, CiteScore: 0)
Archivos de Neurociencias     Open Access   (Followers: 3, SJR: 0.111, CiteScore: 0)
Archivos de Pediatria del Uruguay     Open Access   (Followers: 3)
Archivos de Zootecnia     Open Access   (Followers: 1, SJR: 0.202, CiteScore: 0)
Archivos Españoles de Urología     Open Access   (SJR: 0.178, CiteScore: 0)
Argos     Open Access   (Followers: 1)
ARQ     Open Access   (Followers: 6, SJR: 0.113, CiteScore: 0)
Arquitectura y Urbanismo     Open Access   (Followers: 3)
Arquivo Brasileiro de Medicina Veterinária e Zootecnia     Open Access   (SJR: 0.248, CiteScore: 0)
Arquivos Brasileiros de Cardiologia     Open Access   (Followers: 1, SJR: 0.381, CiteScore: 1)
Arquivos Brasileiros de Endocrinologia e Metabologia     Open Access  
Arquivos Brasileiros de Oftalmologia     Open Access   (Followers: 1, SJR: 0.518, CiteScore: 1)
Arquivos de Gastroenterologia     Open Access   (Followers: 1, SJR: 0.396, CiteScore: 1)
Arquivos de Medicina     Open Access  
Arquivos de Neuro-Psiquiatria     Open Access   (SJR: 0.448, CiteScore: 1)
Arquivos do Instituto Biológico     Open Access   (Followers: 1)
Arquivos Internacionais de Otorrinolaringologia     Open Access  
ARS     Open Access   (Followers: 4)
Atenea (Concepción)     Open Access   (SJR: 0.112, CiteScore: 0)
Atmósfera     Open Access   (Followers: 2, SJR: 0.449, CiteScore: 1)
Audiology - Communication Research     Open Access   (Followers: 10)
Avaliação : Revista da Avaliação da Educação Superior (Campinas)     Open Access  
Avances en Enfermería     Open Access   (Followers: 2)
Avances en Odontoestomatologia     Open Access   (SJR: 0.105, CiteScore: 0)
Avances en Periodoncia e Implantología Oral     Open Access   (Followers: 1)
Bakhtiniana : Revista de Estudos do Discurso     Open Access   (SJR: 0.103, CiteScore: 0)
BAR. Brazilian Administration Review     Open Access   (Followers: 1, SJR: 0.137, CiteScore: 0)
Biota Neotropica     Open Access   (SJR: 0.381, CiteScore: 1)
Biotecnología Aplicada     Open Access   (SJR: 0.146, CiteScore: 0)
Biotecnología en el Sector Agropecuario y Agroindustrial     Open Access  
Boletim de Ciências Geodésicas     Open Access   (SJR: 0.188, CiteScore: 0)
Boletim do Museu Paraense Emílio Goeldi. Ciências Humanas     Open Access   (Followers: 1, SJR: 0.238, CiteScore: 0)
Boletin Chileno de Parasitologia     Open Access  
Boletín de Filología     Open Access  
Boletín de la Sociedad Botánica de México     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Boletín de la Sociedad Geológica Mexicana     Open Access   (SJR: 0.291, CiteScore: 1)
Boletín del Museo Chileno de Arte Precolombino     Open Access   (Followers: 1, SJR: 0.233, CiteScore: 0)
Bosque     Open Access   (Followers: 2, SJR: 0.29, CiteScore: 1)
Bragantia     Open Access   (Followers: 2, SJR: 0.555, CiteScore: 1)
Brazilian Archives of Biology and Technology     Open Access   (Followers: 3, SJR: 0.281, CiteScore: 1)
Brazilian Dental J.     Open Access   (Followers: 3, SJR: 0.476, CiteScore: 1)
Brazilian J. of Biology     Open Access   (Followers: 3, SJR: 0.523, CiteScore: 1)
Brazilian J. of Chemical Engineering     Open Access   (Followers: 5, SJR: 0.395, CiteScore: 1)
Brazilian J. of Food Technology     Open Access   (Followers: 3, SJR: 0.206, CiteScore: 0)
Brazilian J. of Medical and Biological Research     Open Access   (SJR: 0.611, CiteScore: 2)
Brazilian J. of Microbiology     Open Access   (Followers: 4, SJR: 0.63, CiteScore: 2)
Brazilian J. of Oceanography     Open Access   (Followers: 1, SJR: 0.425, CiteScore: 1)
Brazilian J. of Oral Sciences     Open Access   (Followers: 2, SJR: 0.131, CiteScore: 0)
Brazilian J. of Physical Therapy     Open Access   (SJR: 0.802, CiteScore: 2)
Brazilian J. of Plant Physiology     Open Access   (Followers: 3, SJR: 1.178, CiteScore: 3)
Brazilian J. of Veterinary Research and Animal Science     Open Access   (Followers: 8, SJR: 0.225, CiteScore: 0)
Brazilian Oral Research     Open Access  
Brazilian Political Science Review     Open Access   (Followers: 2)
Bulletin of the World Health Organization     Open Access   (Followers: 18, SJR: 2.532, CiteScore: 3)
Caderno CRH     Open Access   (Followers: 3, SJR: 0.233, CiteScore: 0)
Caderno de Estudos     Open Access  
Cadernos CEDES     Open Access   (Followers: 1, SJR: 0.119, CiteScore: 0)
Cadernos de Pesquisa     Open Access   (Followers: 2, SJR: 0.183, CiteScore: 0)
Cadernos de Saúde Pública     Open Access   (Followers: 1, SJR: 0.568, CiteScore: 1)
Cadernos de Tradução     Open Access  
Cadernos Metrópole     Open Access   (Followers: 1)
Cadernos Nietzsche     Open Access  
Cadernos Pagu     Open Access   (SJR: 0.356, CiteScore: 0)
Cadernos Saúde Coletiva     Open Access   (Followers: 1)
Caldasia     Open Access   (SJR: 0.195, CiteScore: 0)
Calidad en la educación     Open Access   (Followers: 1)
Case Reports     Open Access  
Cerâmica     Open Access   (Followers: 5, SJR: 0.186, CiteScore: 0)
CES Medicina     Open Access  
Chilean J. of Agricultural Research     Open Access   (Followers: 1, SJR: 0.377, CiteScore: 1)
Chungara (Arica) - Revista de Antropologia Chilena     Open Access   (Followers: 1, SJR: 0.565, CiteScore: 1)
Ciência & Saúde Coletiva     Open Access   (Followers: 2, SJR: 0.566, CiteScore: 1)
Ciência & Educação (Bauru)     Open Access  
Ciência Animal Brasileira     Open Access   (Followers: 1, SJR: 0.216, CiteScore: 0)
Ciência da Informação     Open Access   (Followers: 1, SJR: 0.121, CiteScore: 0)
Ciencia del suelo     Open Access   (Followers: 2)
Ciência e Agrotecnologia     Open Access   (SJR: 0.383, CiteScore: 1)
Ciencia e Cultura     Open Access   (Followers: 1)
Ciencia e investigación agraria     Open Access   (Followers: 1, SJR: 0.211, CiteScore: 0)
Ciencia forestal en México     Open Access  
Ciência Rural     Open Access   (Followers: 2, SJR: 0.337, CiteScore: 1)
Ciencia y Enfermeria - Revista Iberoamericana de Investigacion     Open Access   (Followers: 3, SJR: 0.158, CiteScore: 0)
Ciencias Marinas     Open Access   (Followers: 3, SJR: 0.414, CiteScore: 1)
Ciencias Psicológicas     Open Access  
Cirugia Plastica Ibero-Latinoamericana     Open Access   (SJR: 0.166, CiteScore: 0)
CLEI Electronic J.     Open Access  
Clínica y Salud     Open Access   (SJR: 0.173, CiteScore: 0)
Clinics     Open Access   (SJR: 0.536, CiteScore: 1)
CoDAS     Open Access   (SJR: 0.267, CiteScore: 0)
Comuni@cción     Open Access   (Followers: 1)
Comunicación y sociedad     Open Access   (Followers: 2, SJR: 0.327, CiteScore: 0)
Contaduría y Administración     Open Access   (SJR: 0.219, CiteScore: 0)
Contexto Internacional     Open Access  
Convergencia     Open Access   (Followers: 3, SJR: 0.196, CiteScore: 0)
Correo Científico Médico     Open Access  
Corrosão e Protecção de Materiais     Open Access  
Crop Breeding and Applied Biotechnology     Open Access   (Followers: 3, SJR: 0.609, CiteScore: 1)
Cuadernos de Administración (Universidad del Valle)     Open Access   (Followers: 2)
Cuadernos de Economía     Open Access   (SJR: 0.115, CiteScore: 0)
Cuadernos de Economía     Open Access   (Followers: 2)
Cuadernos de Economia - Latin American J. of Economics     Open Access   (Followers: 3)
Cuadernos de Historia     Open Access   (Followers: 1)
Cuadernos de Medicina Forense     Open Access   (Followers: 2, SJR: 0.1, CiteScore: 0)
Cuadernos.info     Open Access   (SJR: 0.38, CiteScore: 0)
Cubo. A Mathematical J.     Open Access  
Cuicuilco     Open Access   (Followers: 1)
Cultivos Tropicales     Open Access   (Followers: 1)
Culturales     Open Access   (Followers: 3)
Dados - Revista de Ciências Sociais     Open Access   (SJR: 0.37, CiteScore: 0)
De Jure     Open Access   (Followers: 1)
DELTA : Documentação de Estudos em Lingüística Teórica e Aplicada     Open Access   (SJR: 0.133, CiteScore: 0)
Dementia & Neuropsychologia     Open Access   (Followers: 10, SJR: 0.205, CiteScore: 0)
Dental Press J. of Orthodontics     Open Access   (Followers: 4, SJR: 0.489, CiteScore: 1)
Desacatos     Open Access   (Followers: 1)
Desarrollo y Sociedad     Open Access   (Followers: 3, SJR: 0.109, CiteScore: 0)
Diálogo Andino - Revista de Historia, Geografía y Cultura Andina     Open Access   (Followers: 1, SJR: 0.116, CiteScore: 0)
Diánoia     Open Access   (Followers: 1)
Dimensión Empresarial     Open Access  
Dynamis : Acta Hispanica ad Medicinae Scientiarumque Historiam Illustrandam     Open Access   (Followers: 2, SJR: 0.131, CiteScore: 0)
e-J. of Portuguese History     Open Access   (Followers: 2, SJR: 0.101, CiteScore: 0)
Eclética Química     Open Access   (Followers: 1)
Ecología en Bolivia     Open Access  
Economia Aplicada     Open Access   (SJR: 0.208, CiteScore: 0)
Economia e Sociedade     Open Access  
EconoQuantum     Open Access  
Educação & Sociedade     Open Access   (Followers: 3)
Educação e Pesquisa     Open Access   (Followers: 1, SJR: 0.163, CiteScore: 0)
Educação em Revista     Open Access  
Educación Matemática     Open Access  
Educación Médica     Open Access   (Followers: 1, SJR: 0.236, CiteScore: 0)
Educación Médica Superior     Open Access   (Followers: 1, SJR: 0.237, CiteScore: 0)
Educación y Educadores     Open Access  
Educar em Revista     Open Access  
EDUMECENTRO     Open Access  
En-Claves del pensamiento     Open Access   (Followers: 1, SJR: 0.194, CiteScore: 0)
Encuentros     Open Access  
Ene : Revista de Enfermería     Open Access  
Enfermería Global     Open Access   (Followers: 3, SJR: 0.165, CiteScore: 0)
Enfermería Nefrológica     Open Access   (Followers: 1, SJR: 0.198, CiteScore: 0)
Enfoques     Open Access  
Engenharia Agrícola     Open Access   (SJR: 0.305, CiteScore: 1)
Engenharia Sanitaria e Ambiental     Open Access   (SJR: 0.218, CiteScore: 0)
Ensaio Avaliação e Políticas Públicas em Educação     Open Access   (Followers: 1, SJR: 0.254, CiteScore: 0)
Entomologia y Vectores     Open Access   (Followers: 2)
Escritos de Psicología : Psychological Writings     Open Access   (Followers: 2)
Estudios Atacameños     Open Access   (Followers: 2, SJR: 0.446, CiteScore: 1)
Estudios Constitucionales     Open Access   (Followers: 5, SJR: 0.319, CiteScore: 0)
Estudios de Cultura Maya     Open Access   (Followers: 2, SJR: 0.272, CiteScore: 0)
Estudios de Economía     Open Access   (SJR: 0.121, CiteScore: 0)
Estudios de historia moderna y contemporánea de México     Open Access   (SJR: 0.101, CiteScore: 0)
Estudios Filologicos     Open Access   (SJR: 0.107, CiteScore: 0)
Estudios Fronterizos     Open Access   (Followers: 1)

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Similar Journals
Journal Cover
Actualidades Biológicas
Number of Followers: 1  

  This is an Open Access Journal Open Access journal
ISSN (Print) 0304-3584 - ISSN (Online) 2145-7166
Published by SciELO Homepage  [703 journals]
  • The transformation of the academic journal Actualidades
           Biológicas
    in open access era

    •  
  • Feeding habits of the gafftopsail sea catfish Bagre marinus (Mitchill,
           1815) (Siluriformes: Ariidae) in Urabá Gulf, Colombian Caribbean

    • Abstract: Resumen Comprender la biología de los recursos pesqueros es un insumo básico para definir su adecuada administración; por esto, los estudios de ecología trófica aportan información importante sobre la distribución espacio-temporal de las poblaciones de peces y sus presas. Empleando artes de pesca pasivas como palangre y redes de enmalle, se capturaron 373 individuos del barbudo de pluma Bagre marinus de los cuales se analizaron 252 estómagos. Se identificaron 41 ítems alimenticios clasificados en diferentes grupos, de los cuales, los restos de peces, el pez Anchoa sp., los crustáceos peneidos, el pez Cathorops mapale, los huevos de peces y material vegetal fueron los más frecuentes. El análisis de la dieta indicó que se trata de una especie omnívora. Los hábitos alimenticios de este ariido responden a un gradiente estuarino en dirección sur-norte, con diferencias significativas entre épocas y sin solapamientos significativos entre sitios. Al norte, las presas crustáceos peneidos dominan la dieta, al parecer por las altas salinidades de esta zona que favorecen su abundancia, mientras que la zona sur, caracterizada por la presencia de importantes extensiones de manglar, parece ser un área adecuada para un rango más amplio de presas marinas y estuarinas, particularmente peces. Understanding the biology of fishing resources is a basic tool in order to define their adequate administration, and for that, trophic ecology studies gather important information about the spatio-temporal distribution of fish populations and their preys. Using passive fishing tackles such as longline and gillnets, 373 specimens of the gafftopsail sea catfish Bagre marinus were caught from which, 252 stomachs were analyzed. 41 food items were identified and classified in different groups, of which, fish remains, the fish Anchoa sp, peneid crustaceans, the fish Cathorops mapale, fish eggs and vegetal material were the most frequent ones. The diet analysis indicates that it is an omnivore species. The feeding habits of this ariid, respond to an estuarine gradient in direction south-north, with significant differences between seasons and no significant overlapping between sites. To the north, the peneid crustacean preys are dominant in the diets, apparently due to high salinities of this zone that favor their abundance, while the south zone, characterized by large extensions of mangroves, is apparently an adequate area for a wider spectrum of marine and estuarine preys, particularly fish.
       
  • Structural changes of the periphytic community in the Yahuarcaca lake
           system, Colombian Amazon

    • Abstract: Resumen El estudio analiza el proceso de sucesión de la comunidad perifítica en las fracciones bacteriana, algal y de protozoos, durante los períodos limnológicos de aguas bajas y aguas altas en el sistema lagunar de Yahuarcaca, ubicado en la llanura aluvial del río Amazonas (Leticia, Colombia). Cada 12 h, durante tres días, fueron recolectadas tres láminas de acetato por ambiente (región limnética y entre los macrófitos). El proceso de colonización bacteriana para el período de aguas bajas inició a las 12 h con valores de 2,98E+06 - 1,84E+06 cel/ml; a las 36 y 48 h con 6,36E+06 - 6,16E+06 cel/ml y finalizó con un descenso de 2,57E+06 -1,32E+06 cel/ml a las 72 h. Para el período de aguas altas se presentó un aumento en la densidad de este componente con valores iniciales de 1,55E+07 - 8,54E+06 cel/ml. En la primera etapa de colonización algal predominaron los géneros bidimensionales. En la segunda etapa Gomphonema aff., G. gracile, Melosira varians y Pinnularia sp.; y en la última fase se encontraron especies como Fragillaria aff. intermedia, F. aff. ulna, Aulacoseira varians, Oedogonium sp., Ulothix sp. y Nostoc sp. Entre los protozoos, los primeros colonizadores fueron los flagelados, seguidos de los ciliados bacteriófagos de vida libre que dieron paso a los ciliados fijos (tipo vorticélidos). La temperatura y la conductividad fueron las variables que presentaron mayor relación con la fracción algal, al contrario de la fracción bacteriana, que dominó al inicio del proceso. Para los protozoos, el pH fue el factor que más influyó en la presencia y abundancia durante la sucesión, presentando dominancia hacia las horas finales durante los dos períodos limnológicos. La disminución y aparición de nuevas especies de algas hacia las horas finales del proceso de colonización, evidenciaron un cambio en la estructura del perifiton y una sucesión de la comunidad en un lapso de 72 h para este sistema de la Amazonia colombiana. The study analyzes the succession process of the periphytic community in the bacterial, algal and protozoal fractions during the limnological periods of low water and high water in the lagoon system of Yahuarcaca, located in the floodplain of the Amazon River (Leticia, Colombia). Every 12 hours, for three days, three sheets of acetate per environment were collected (limnetic region and between macrophytes). The process of bacterial colonization for the low-water period began at the twelfth hour with values ​​of 2.98E + 06 ― 1.84E + 06 cells/ml; at hours 36 and 48, with 6.36E + 06 - 6.16E + 06 cells/ml and ended with a decline of 2.57E + 06 - 1.32E + 06 cells/ml at hour 72. For the period of high water there was an increase in the density of this component, with initial values of 1.55E + 07 - 8.54E + 06 cells/ml. In the first stage of the algal colonization the two-dimensional genres predominated. In the second stage, Gomphonema aff., G. gracile, Melosira varians and Pinnularia sp.; and in the last phase, species such as Fragillaria aff. intermediate, F. aff. ulna, Aulacoseira varians, Oedogonium sp., Ulothix sp. and Nostoc sp were found. Among the protozoa, the first settlers were flagellates, followed by free-living bacteriophage ciliates that gave way to fixed ciliates (vorticélidos type). Temperature and conductivity were the variables that had a closer relationship with the algal fraction, unlike the bacterial fraction, which dominated at the beginning of the process. For protozoa, the pH was the most influential factor in the presence and abundance during succession, presenting dominance toward the final hours during the two limnological periods. The decline and appearance of new species of algae at the final hours of the colonization process, made evident a change in the structure of periphyton and a succession of the community in a span of 72 hours for this system in the Colombian Amazon.
       
  • Evolución darwiniana*

    • Abstract: Resumen El estudio analiza el proceso de sucesión de la comunidad perifítica en las fracciones bacteriana, algal y de protozoos, durante los períodos limnológicos de aguas bajas y aguas altas en el sistema lagunar de Yahuarcaca, ubicado en la llanura aluvial del río Amazonas (Leticia, Colombia). Cada 12 h, durante tres días, fueron recolectadas tres láminas de acetato por ambiente (región limnética y entre los macrófitos). El proceso de colonización bacteriana para el período de aguas bajas inició a las 12 h con valores de 2,98E+06 - 1,84E+06 cel/ml; a las 36 y 48 h con 6,36E+06 - 6,16E+06 cel/ml y finalizó con un descenso de 2,57E+06 -1,32E+06 cel/ml a las 72 h. Para el período de aguas altas se presentó un aumento en la densidad de este componente con valores iniciales de 1,55E+07 - 8,54E+06 cel/ml. En la primera etapa de colonización algal predominaron los géneros bidimensionales. En la segunda etapa Gomphonema aff., G. gracile, Melosira varians y Pinnularia sp.; y en la última fase se encontraron especies como Fragillaria aff. intermedia, F. aff. ulna, Aulacoseira varians, Oedogonium sp., Ulothix sp. y Nostoc sp. Entre los protozoos, los primeros colonizadores fueron los flagelados, seguidos de los ciliados bacteriófagos de vida libre que dieron paso a los ciliados fijos (tipo vorticélidos). La temperatura y la conductividad fueron las variables que presentaron mayor relación con la fracción algal, al contrario de la fracción bacteriana, que dominó al inicio del proceso. Para los protozoos, el pH fue el factor que más influyó en la presencia y abundancia durante la sucesión, presentando dominancia hacia las horas finales durante los dos períodos limnológicos. La disminución y aparición de nuevas especies de algas hacia las horas finales del proceso de colonización, evidenciaron un cambio en la estructura del perifiton y una sucesión de la comunidad en un lapso de 72 h para este sistema de la Amazonia colombiana. The study analyzes the succession process of the periphytic community in the bacterial, algal and protozoal fractions during the limnological periods of low water and high water in the lagoon system of Yahuarcaca, located in the floodplain of the Amazon River (Leticia, Colombia). Every 12 hours, for three days, three sheets of acetate per environment were collected (limnetic region and between macrophytes). The process of bacterial colonization for the low-water period began at the twelfth hour with values ​​of 2.98E + 06 ― 1.84E + 06 cells/ml; at hours 36 and 48, with 6.36E + 06 - 6.16E + 06 cells/ml and ended with a decline of 2.57E + 06 - 1.32E + 06 cells/ml at hour 72. For the period of high water there was an increase in the density of this component, with initial values of 1.55E + 07 - 8.54E + 06 cells/ml. In the first stage of the algal colonization the two-dimensional genres predominated. In the second stage, Gomphonema aff., G. gracile, Melosira varians and Pinnularia sp.; and in the last phase, species such as Fragillaria aff. intermediate, F. aff. ulna, Aulacoseira varians, Oedogonium sp., Ulothix sp. and Nostoc sp were found. Among the protozoa, the first settlers were flagellates, followed by free-living bacteriophage ciliates that gave way to fixed ciliates (vorticélidos type). Temperature and conductivity were the variables that had a closer relationship with the algal fraction, unlike the bacterial fraction, which dominated at the beginning of the process. For protozoa, the pH was the most influential factor in the presence and abundance during succession, presenting dominance toward the final hours during the two limnological periods. The decline and appearance of new species of algae at the final hours of the colonization process, made evident a change in the structure of periphyton and a succession of the community in a span of 72 hours for this system in the Colombian Amazon.
       
 
 
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