Related Experiment Video
Updated: May 25, 2026

Discovery of New Intracellular Pathogens by Amoebal Coculture and Amoebal Enrichment Approaches
Published on: October 27, 2013
Trachelomonas (Euglenophyta) from a eutrophic reservoir in Central Mexico
Gloria Garduño Solórzano1, Maria Guadalupe Oliva Martinez, Alfonso Lugo Vazquez
1Facultad de Estudios Superiores Iztacala, UNAM. Av.de los Barrios No. 1, Col. Los Reyes Iztacala, Tlalnepantla de Baz, Estado de México, 54090. ggs@servidor.unam.mx
This study identified 12 Trachelomonas species, including 9 new to Mexico, in Guadalupe Dam. These algae thrive in warm, nutrient-rich, wastewater-affected waters, particularly during the dry season.
Area of Science:
- Microbiology
- Ecology
- Phycology
Background:
- Guadalupe Dam is a eutrophic reservoir receiving significant wastewater, impacting its aquatic ecosystem.
- The genus Trachelomonas (Euglenophyceae) is a key component of phytoplankton in freshwater environments.
Purpose of the Study:
- To investigate the ultrastructure and environmental conditions of Trachelomonas species in Guadalupe Dam.
- To identify new records of Trachelomonas for Mexico and describe their lorica ultrastructure.
Main Methods:
- Phytoplankton specimens were collected from the surface of Guadalupe Dam between November 2005 and May 2006.
- Light microscopy (LM) and scanning electron microscopy (SEM) were used for species identification and ultrastructural analysis.
Main Results:
- Twelve Trachelomonas taxa were identified, with nine being new records for Mexico.
- The reservoir exhibited warm monomictic conditions, basic pH (7.4-10.1), high chlorophyll a (18-101 µg l⁻¹), and elevated nutrient levels (N-NO3, P-PO4).
- Trachelomonas species richness was highest during the dry season, correlating with higher temperatures and nutrient concentrations.
Conclusions:
- This study expands the knowledge of Trachelomonas in Mexico, providing the first detailed description of lorica ultrastructure for 12 taxa.
- The findings highlight the adaptability of Trachelomonas to eutrophic, wastewater-impacted aquatic environments.
More Related Videos
09:44Characterization of a Pathogenic Escherichia coli Strain Derived from Oreochromis spp. Farms Using Whole-Genome Sequencing
Published on: December 23, 2022
14:38Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential
Published on: April 20, 2012
Related Concept Videos
Diversity of Protists I
Bacterial Phylum Chlamydiae
Diversity of Protists II
Anoxygenic Phototrophic Bacteria
Freshwater Microbial Ecology
Diversity of Protists III