Table of Contents

Editorial
Munawar, M., S. Lawrence, I.F. Munawar, D. Malley

Preface
Hamilton, A.

Aquatic ecosystems of Mexico: The political and social context
Mestre, J. E.

Freshwater ecosystems:

Epicontinental aquatic systems of Mexico in the context of hydrology, climate, geography and geology
Alcocer, A., E. Escobar & L.E. Marín

Heavy metal concentration in the sediments of the Upper Lerma Basin, Mexico
Lugo de la Fuente, J., G. Hernández Silva & L.E. Marín

Analysis of coliform contamination at "Emiliano Zapata Dam", Morales State, Mexico
Gomez-Marquez, J.L., I.H. Salgado-Ugarte & S. Ortega-Munguia

Occurrence of pathogenic and free-living amoebae in aquatic systems of Huasteca Potosina, Mexico
Bonilla, P., E. Ramírez, R. Ortíz, A. Calderón, E. Gallegos & D. Hernández

Pelagic ciliate assemblage of high-altitude lake Atexcac (Puebla, Mexico): comparison with similar lakes in other regions
Macek, M., A. Lugo V., G. Vilaclara F.

Lake Zirahuen (Mexico): An assessment of the morphometry change based on evidence of water level fluctuations and sediment inputs.
Bernal-Brooks, F.W. & H.R. MacCrimmon

Lake Zirahuen (Mexico): A pristine natural reservoir visually insensitive to expected cultural eutrophication
Bernal-Brooks, F.W. & H.R. MacCrimmon

The effects of hypereutrophication in a tropical Mexican Lake
Chacon Torres, A., C. Rosas-Monge, J. Alvarado-Diaz

An eutrophication-induced shift in the composition, frequency and abundance of the phytoplankton in Lake Catemaco, Veracruz, Mexico
Tavera, R., & S. Castillo

Dynamic models of primary production in a tropical high-mountain lake: El Sol, Mexico
González-Villela, R., G. J. de la Lanza & A. G. Banderas-Tarabay

Algal communities from calcareous springs and streams in La Hausteca, central Mexico: a synthesis
Montejano, G., J. Carmona-Jiménez, E. Cantoral-Uriza

The aquatic fauna of karstic environments in the Yucatan Peninsula, Mexico: an updated overview
Suárez-Morales, E. & E. Rivera-Arriaga

Aquatic ecosystem pollution of the Ayuquila River, Sierra de Manantlan Biosphere Reserve, Mexico
Martínez, L.M & García, M.

The microtox test and toxicity balance used to assess the toxic potency of industrial discharges on receiving waters
Saldana, P., Gomez, A., Lerdo de Tejada, A., Marquez, L., Izurieta, J., Ruiz, A., Gutierrez, E., Lopez, R., Ordonez, A.

Environmental and biological characteristics of Artemia ecosystems in Mexico: an updated review
Castro, T., A. Malpica, J. Castro, G. Castro, R. De Lara

Brachionus species in Aguascalientes State, Mexico
Silva-Briano, M., A. Adabache-Ortíz

Marine Ecosystems:

An introductory account of the types of aquatic ecosystems of Yucatán Peninsula (SE Mexico)
Herrera-Silveira, J.A. & F.A. Comín

Determination of hydrogeological characteristics and mapping of the sea water intrusion of the Yaqui Valley aquifer, Sonora, Mexico
Steinich, B., J. Andrés Chavarría

Environmental natural disturbances at Bahía Concepción, Gulf of California
Lechuga-Devéze, C.H., M.L. Morquecho-Escamilla, A. Reyes-Salinas & J.R. Hernández-Alfonso

Occurance of Vibrio cholerae in the brackish water of a coastal lagoon on the Gulf of Mexico
Cortés-Muñoz, J., P. Ramírez-García, & J. Sánchez-Chávez

Biodiversity and biogeographic affinities of the algal flora of Baja California Sur: a synthesis of the literature
Casas-Valdez, M., R. A. Núñez-López, M. B. Cruz-Ayala, I. Sánchez-Rodríguez, R. Vázquez-Borja, G. E. López

Macroalgal communities at coastal lagoons of the Yucatán Peninsula, Mexico
Ortegón-Aznar, I., J. González-González

Distribution and seasonality of seaweeds in San Ignacio Lagoon, Baja California Sur, Mexico
Núñez-López, R. A., M. M. Casas-Valdez

Macroalgal communities from Laguna Superior, Oaxaca
León Tejera, H. P. & J. González González

Subtidal macroalgal communities of Acapulco and Zihuatanejo, Guerrero, Mexico
López, N., D. Rodríguez, C. Candelaria, J. González-González

A review of algae associated with Mexican mangrove forests
Collado-Vides, L.

Fish resource allocation in coral reefs of Yucatán Peninsula
Garduño, M. & E. A. Chávez

The distribution and affinities of the shore fishes of the Baja California Sur lagoons
Galván-Magaña, F., F. Gutiérrez-Sánchez, L. A. Abitia- Cárdenas, J. Rodríguez- Romero

Taxonomic, bioecological and biogeographic aspects of selected biota of the Laguna Madre, Tamaulipas, Mexico
Leija-Tristán, A., A. Contreras-Arquieta, M.E. García-Garza, A.J. Contreras- Balderas, M. de L. Lozano-Vilano, S. Contreras-Balderas, M.E. García-Ramírez, J. Ortíz-Rosales, F. Segovia-Salinas, F. Jiménez-Guzmán, D. Lazcano-Villarreal, J.A. de León-González, S. Martínez-Lozano, G.A. Rodríguez-Almaraz, M.A. Guzmàn-Lucio, M.del C. Gonzàlez de la Rosa, J.A. García-Salas, G. Guajardo-Martínez, J.I. González-Rojas & A. Guzmán-Velazco