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Long term analyses of the microbial loop, centred on the picoplankton dynamics, were carried out over a five-year (1998 to 2002) period in Lake Alchichica (Puebla, Mexico), a high altitude tropical athalassohaline lake. The hydrodynamics of the lake followed a warm-monomictic pattern with mixing at a minimum temperature during the early dry season while the stratification was pronounced in the late dry season and throughout the rainy season; anoxic conditions in the hypolimnion lasted <9 months. The annual mean concentrations of chlorophyll-a were below 4 μg L-1 in 1998, 1999 and 2001, however, 6.1 and 5.2 μg L-1 in 2000 and 2002, respectively. Total picoplankton, TPP, displayed a temporal pattern that followed the mixing-stratification cycle. The highest TPP values (the whole water column ≥5×106 cells mL-1) were found during mixing and early stratification (January-March). The minimum numbers were present during late stratification (October-November). The maximum TPP numbers were observed within the layer 0-20 m, which corresponded to the epilimnion during the stratification period. Neither the thermocline nor the deep chlorophyll maximum showed an elevated TPP concentration. In the hypolimnion, TPP numbers were low (frequently <1×106 cells mL-1) apparently as a result of the long period of anoxia. Notwithstanding autotrophic picoplankton (APP) contributed even ≥30% of TPP (2001 to 2002); no significant correlation was found between TPP and chlorophyll-a. MACEK, Miroslav, Javier ALCOCER, Alfonso LUGO VÁZQUEZ, María Elena MARTÍNEZ-PÉREZ, Laura PERALTA SORIANO, and Gloria VILACLARA FATJÓ. 2009. “Long Term Picoplankton Dynamics in a Warm-Monomictic, Tropical High Altitude Lake”. Journal of Limnology 68 (2):183-92. https://doi.org/10.4081/jlimnol.2009.183. More Citation Formats ACM ACS APA ABNT Chicago Harvard MLA Turabian Vancouver Download Citation Endnote/Zotero/Mendeley (RIS) BibTeX Downloads Download data is not yet available. Citations List of Cited By : Ciliate food vacuole content and bacterial community composition in the warm-monomictic crater Lake Alchichica, México Fernando Bautista-Reyes, Miroslav Macek FEMS Microbiology Ecology : 2012 Lake Alchichica Limnology Elva Escobar, Javier Alcocer The role of ecophysiological and behavioral traits in structuring the zooplankton assemblage in a deep, oligotrophic, tropical lake Jorge Ciros-Pérez, Elizabeth Ortega-Mayagoitia, Javier Alcocer Limnology and Oceanography : 2015 Limnology in Mexico Javier Alcocer, Fernando W. Bernal-Brooks Hydrobiologia : 2010 Comparative metagenomics unveils functions and genome features of microbialite‐associated communities along a depth gradient Aurélien Saghaï, Yvan Zivanovic, David Moreira, Karim Benzerara, Paola Bertolino, Marie Ragon, Rosaluz Tavera, Ana Isabel López‐Archilla, Purificación López‐García Environmental Microbiology : 2016 Autotrophic picoplankton assemblages in subtropical reservoir: temporal and vertical dynamics in abundance and biomass Fernando Pantoja-Agreda, Ernesto Otero-Morales Journal of Freshwater Ecology : 2017 Lake Alchichica Limnology Javier Alcocer, Martín Merino-Ibarra, Jorge A. Ramírez-Zierold, Luis A. Oseguera, Daniela Cortés-Guzmán, F. Sergio Castillo-Sandoval, Andrea P. Guzmán-Arias, María Guadalupe Pérez-Ramírez Lake Alchichica Limnology Javier Alcocer, Luis A. Oseguera, Daniel Cuevas-Lara, Sandra Guadarrama-Hernández, Benjamín Quiroz-Martínez Modelling approach for characterizing thermal stratification and assessing water quality for a large tropical reservoir J. G. Rangel‐Peraza, O. Obregon, J. Nelson, G. P. Williams, J. de Anda, F. González‐Farías, J. Miller Lakes & Reservoirs: Science, Policy and Management for Sustainable Use : 2012 Vertical and seasonal distribution of picoplankton and functional nitrogen genes in a high‐altitude warm‐monomictic tropical lake Silvia Pajares, Martín Merino‐Ibarra, Miroslav Macek, Javier Alcocer Freshwater Biology : 2017 Synechococcus plasticity under environmental changes Cristiana Callieri FEMS Microbiology Letters : 2017 Phylogenetic diversity of nonmarine picocyanobacteria Cristiana Callieri, Manuela Coci, Gianluca Corno, Miroslav Macek, Beatriz Modenutti, Esteban Balseiro, Roberto Bertoni FEMS Microbiology Ecology : 2013 Modelling and forecasting the heterogeneous distribution of picocyanobacteria in the tropical Lajes Reservoir (Brazil) by evolutionary computation Friedrich Recknagel, Christina W. Castelo Branco, Hongqing Cao, Vera L. M. Huszar, lzidro F. Sousa-Filho Hydrobiologia : 2015 Prokaryotic picoplankton dynamics in a warm-monomictic saline lake: temporal and spatial variation in structure and composition J. S. Hernandez-Aviles, M. Macek, J. Alcocer, B. Lopez-Trejo, M. Merino-Ibarra Journal of Plankton Research : 2010 Alkaline phosphatases in microbialites and bacterioplankton from Alchichica soda lake, Mexico Patricia M. Valdespino-Castillo, Rocio J. Alcántara-Hernández, Javier Alcocer, Martín Merino-Ibarra, Miroslav Macek, Luisa I. Falcón FEMS Microbiology Ecology : 2014 Lake Alchichica Limnology Rocío J. Alcántara-Hernández, Miroslav Macek, Jesús Torres-Huesca, Juan Arellano-Posadas, Patricia M. Valdespino-Castillo Phylotype Dynamics of Bacterial P Utilization Genes in Microbialites and Bacterioplankton of a Monomictic Endorheic Lake Patricia M. Valdespino-Castillo, Rocío J. Alcántara-Hernández, Martín Merino-Ibarra, Javier Alcocer, Miroslav Macek, Octavio A. Moreno-Guillén, Luisa I. Falcón Microbial Ecology : 2017 Phenotypic plasticity of life-history traits of a calanoid copepod in a tropical lake: Is the magnitude of thermal plasticity related to thermal variability? Elizabeth Ortega-Mayagoitia, Osvaldo Hernández-Martínez, Jorge Ciros-Pérez, Daniel E. Naya PLOS ONE : 2018 Mexican Aquatic Environments Javier Alcocer, Fernando W. Bernal-Brooks Metagenome-based diversity analyses suggest a significant contribution of non-cyanobacterial lineages to carbonate precipitation in modern microbialites Aurélien Saghaï, Yvan Zivanovic, Nina Zeyen, David Moreira, Karim Benzerara, Philippe Deschamps, Paola Bertolino, Marie Ragon, Rosaluz Tavera, Ana I. López-Archilla, Purificación López-García Frontiers in Microbiology : 2015 Seasonal and Interannual Dynamics of Pelagic Rotifers in a Tropical, Saline, Deep Lake Rocío Fernández, Javier Alcocer, Alfonso Lugo, Luis A. Oseguera, Sandra Guadarrama-Hernández Diversity : 2022 Lake Alchichica Limnology Gloria Vilaclara, María Guadalupe Oliva-Martínez, Miroslav Macek, Elizabeth Ortega-Mayagoitia, Rocío J. 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