A5049593783- Protist diversity and phylogeny
- Biocrusts and Microbial Ecology
- Legionella and Acanthamoeba research
- Microbial Community Ecology and Physiology
- Soil Carbon and Nitrogen Dynamics
- Mycorrhizal Fungi and Plant Interactions
- Slime Mold and Myxomycetes Research
- Insect and Arachnid Ecology and Behavior
- Bacterial biofilms and quorum sensing
- Lichen and fungal ecology
- Study of Mite Species
- Yersinia bacterium, plague, ectoparasites research
- Indoor Air Quality and Microbial Exposure
- Marine and coastal ecosystems
- Legume Nitrogen Fixing Symbiosis
- Heme Oxygenase-1 and Carbon Monoxide
- Building materials and conservation
- Nematode management and characterization studies
- Soil and Environmental Studies
- Constructed Wetlands for Wastewater Treatment
- Parasitic Infections and Diagnostics
- Rabies epidemiology and control
- Isotope Analysis in Ecology
- Coastal wetland ecosystem dynamics
- Geochemistry and Elemental Analysis
Universidad Nacional Autónoma de México
1994-2023
Autonomous University of Tlaxcala
2005-2022
Bar-Ilan University
2005
The Ohio State University
1998
Ecologie Microbienne Lyon
1997
ABSTRACT The 18S rRNA gene ( Rns ) phylogeny of Acanthamoeba is being investigated as a basis for improvements in the nomenclature and taxonomy genus. We previously analyzed sequences from 18 isolates morphological groups 2 3 found that they fell into four distinct evolutionary lineages we called sequence types T1‐T4. Here, 53 representing 16 species including 35 new strains. Eight additional (sequence T5‐T12) were identified. Four 12 included strains more than one nominal species. Thus,...
A field study was designed to examine the effect of desert shrubs on dynamics free-living amoebae in arid soil. Soil samples from 0- 50-cm depths were collected at 10-cm intervals each four seasons. The vertical distributions main morphological types amoebae, grouped according their mobility, and small flagellate populations measured under canopies Hammada scoparia Atriplex halimus, belonging chloride-absorbing xerohalophytes. result obtained demonstrated that total number protozoa...
The spatial and temporal patterns of resource distribution in a desert system have been shown to influence number soil biota components processes. pattern possible different resources supplied by two typical halophyte shrubs with ecophysiological adaptations, Atriplex halimus Hammada scoparia, was found be the trigger present study on microbial community (vertical) scale. uniqueness A. halimus, saltbush plant, is creation 'islands salinity' its rhizosphere relatively high percentage organic...
Abstract Prosopis laevigata (mesquite; Fabaceae) forms fertility islands in soils of semi-arid lands where microbial diversity concentrates response to the accumulation resources soil beneath individual plants, promoting organic matter decomposition and nutrient cycling. This phenomenon provides suitable conditions for proliferation key edaphic elements such as fungi mites. Mite-fungal interactions are central our understanding cycling processes resource-limited arid food webs; yet, no...
Terrestrial plant roots exude compounds that promote the proliferation of microorganisms, a phenomenon called rhizosphere effect. However, little is known about influence aquatic plants on microbial populations. We compared cultivable bacteria and protozoa from rhizoplanes Azolla filiculoides Lam., Lemna gibba L., Ricciocarpus natans collected at Tecocomulco Lagoon (Hidalgo, Mexico). The functional bacterial groups isolated A. filiculoides, L. R. natans, were macro- microscopically...
Acta Protozoologica » 2018 Volume 57, Issue 4 Population dynamics of amoeboid protists in a tropical desert: seasonal changes and effects vegetation soil conditions A
Several species of pathogenic Acanthamoeba cause infections to humans, but amoebic keratitis is more frequently found than any other due the increasing number contact lens wearers in world. Cysts and trophozoites these amebas are airborne may pollute water from air. We investigated proportion atmosphere city San Luis Potosi. Samples were taken by impinger method, every month during one year. isolated 23 strains Acanthamoeba, 61% them non-pathogenic, 31% non-pathogenic with invasive capacity...
ABSTRACT. The species richness and quantity of naked amebae were determined in the bulk soil rhizoplane desert plant Escontria chiotilla Valley Tehuacan, Mexico. Samples from taken at 10‐cm 30‐cm depths April, May July, 1993, roots a depth June 1994. Quantity obtained by Most Probable Number method increased two orders magnitude after rains. Likewise, countable population doubled numbers both 10‐ We isolated 163 strains root environments, which grouped into 40 bactivorous and/or generalist...
Desert shrubs modify the soil’s physical and chemical properties under their canopies, making it different from bare soil. Knowledge of variation Prosopis laevigata Parkinsonia praecox is necessary to understand functioning desert microenvironments. The objective this study was determine soil structure, temperature, texture, moisture, water-holding capacity, electrical conductivity (EC), pH, organic matter (OM), orthophosphate (OP) content variations these factors P. at 0- 50-cm depths...