Variación de los Organismos Fitoplanctónicos y la Calidad del Agua en el Lago de Chapala, Jalisco, México

Castelán, Héctor Quiroz; Zúñiga, Lorena Miriam Mora; Astudillo, Isela Molina; Rodríguez, Judith García

doi:10.15174/au.2004.238

Cited by 10 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In several lakes suffering the eutrophication process, green algae and diatoms have been replaced by cyanobacteria, particularly Anabaena spp., Microcystis aeruginosa (Kützing) Kützing 1846, Oscillatoria spp., and Lyngbya spp. ( [17][18][19][20][21][22], among others).…”

Section: Mexicomentioning

confidence: 99%

Eutrophication and Phytoplankton: Some Generalities from Lakes and Reservoirs of the Americas

González¹,

Roldán²

2020

Microalgae - From Physiology to Application

View full text Add to dashboard Cite

Eutrophication is one of the most widespread problems of inland waters in the world. In many countries from North to South America, eutrophication is due to several impacts resulting from the inefficient or nonexistent wastewater treatment; the agricultural expansion with inadequate soil uses and application of chemical fertilizers; the urbanization of watersheds, the increase of intensive husbandry of cattle, pigs, and chicken; the increase of aquaculture; the construction of reservoirs; and the destruction of natural ecosystems. Basically, the increase in the internal load of nitrogen and phosphorus in lakes and reservoirs produces an increase in the biological productivity of the water bodies. As consequence, phytoplankton community in freshwater systems is mainly dominated by cyanobacteria. Despite differences in continental climate regimes, this seems to be a regular pattern along the Americas, where there are various practices related to the use of lower and upper taxonomic groups of phytoplankton for the indication of the trophic level and water quality status of freshwater systems. As was reported in numerous studies in the Americas, increase in nutrient concentrations mainly due to rich in phosphorus cause larger phytoplankton biomass and predominance of cyanobacteria such as genera Microcystis, Anabaena, Planktothrix, Oscillatoria, and Cylindrospermopsis than ever before.

show abstract

Section: Mexicomentioning

confidence: 99%

Eutrophication and Phytoplankton: Some Generalities from Lakes and Reservoirs of the Americas

González¹,

Roldán²

2020

Microalgae - From Physiology to Application

View full text Add to dashboard Cite

show abstract

“…Las condiciones ambientales en el lago de Chapala durante los meses de estudio siguieron un patrón similar de variación espacial y temporal que otros autores han reportado para el área de estudio (CEA-Jalisco, 2014;Limón, 1985;Quiroz et al, 2004;. Las condiciones cálidas prevalecieron a finales de primavera (junio) y durante el verano (julioseptiembre), mientras que en invierno (enero) se registraron las menores temperaturas en la región y variaciones espaciales apenas perceptibles entre áreas del lago, es decir entre sitios (oeste-centro-este) (CEA-Jalisco 2014; Filonov y Tereshchenko, 1999; Filonov et al, 2001).…”

Section: Discussionunclassified

Variación espacio-temporal del fitoplancton del lago de Chapala, México, durante 2012

Lara González,

Robles Jarero,

Pérez Peña

et al. 2024

e-cucba

View full text Add to dashboard Cite

In order to assess the composition and spatio-temporal variation of phytoplankton in Lake Chapala, a study was carriedout at ten sampling stations in January, May and September during 2012. A total of 60 species/morphospecies of netphytoplankton were recorded at the surface and at two metres depth. The Division Chlorophyta recorded the highestnumber of species (22), followed by Cyanophyta (20), Heterokontophyta (13), Euglenophyta (four) and Dinophyta(one). Cyanophyta species accounted for 84-90% of the abundance of the five divisions in the sampling months, withslight species turnover at the order level in this class. Multidimensional scaling analysis (NMDS) showed an evidentseparation of the phytoplankton community between sampling months forming three temporal clusters, consistent withthe exploratory similarity analysis (SIMPER), which also showed three temporal associations. While Bray Curtisordination analysis revealed a significant correlation between phytoplankton species and environmental variables, such asdissolved oxygen, transparency, irradiance, temperature, pH, dissolved oxygen and wind speed (p < 0.05). In conclusion,a clear dominance in presence and abundance of species of the Cyanophyta Division was observed in the lake during thepresent study; identifying the traditional succession process in the phytoplankton community assemblages, characteristicin water bodies with different levels of eutrophication.

show abstract

“…The accelerated growth of the phytoplankton increases the biochemical demand of oxygen and hinders light penetration into more deep layers, causing anoxia ( Smith, 2003 ). These conditions can predispose a change in the composition of the phytoplankton, favoring the loss of sensitive groups and increasing the presence of cyanobacteria ( Cloern, 2001 ; Smith, 2003 ; Xu et al, 2010 ; Pérez-Morales et al, 2016 ) of genera like Anabaena , Anabaenopsis , Cylindrospermopsis , Lyngbya , Microcystis , Nodularia , Phormidium , Planktothrix , and Pseudanabaena ( Komárek and Komárková-Legnerová, 2002 ; Quiroz-Castelan et al, 2004 ; Vasconcelos et al, 2010 ), many of them are potentially toxigenic.…”

Section: Introductionmentioning

confidence: 99%

Changes in the morphology and cell ultrastructure of a microalgal community exposed to a commercial glyphosate formulation and a toxigenic cyanobacterium

Hernández-García

Martínez‐Jerónimo

2023

Front. Microbiol.

View full text Add to dashboard Cite

Human activities significantly influence the health of aquatic ecosystems because many noxious chemical wastes are discharged into freshwater bodies. Intensive agriculture contributes to the deterioration by providing indirectly fertilizers, pesticides, and other agrochemicals that affect the aquatic biota. Glyphosate is one of the most used herbicides worldwide, and microalgae are particularly sensitive to its formulation, inducing displacement of some green microalgae from the phytoplankton that leads to alterations in the floristic composition, which fosters the abundance of cyanobacteria, some of which can be toxigenic. The combination of chemical stressors such as glyphosate and biological ones, like cyanotoxins and other secondary metabolites of cyanobacteria, could induce a combined effect potentially more noxious to microalgae, affecting not only their growth but also their physiology and morphology. In this study, we evaluated the combined effect of glyphosate (Faena®) and a toxigenic cyanobacterium on the morphology and ultrastructure of microalgae in an experimental phytoplankton community. For this purpose, Microcystis aeruginosa (a cosmopolitan cyanobacterium that forms harmful blooms) and the microalgae Ankistrodesmus falcatus, Chlorella vulgaris, Pseudokirchneriella subcapitata, and Scenedesmus incrassatulus were cultivated, individually and jointly, exposing them to sub-inhibitory concentrations of glyphosate (IC10, IC20, and IC40). Effects were evaluated through scanning electron (SEM) and transmission electron (TEM) microscopy. Exposure to Faena® produced alterations in the external morphology and ultrastructure of microalgae both individually and in combined cultures. SEM evidenced the loss of the typical shape and integrity of the cell wall and an increase in the biovolume. TEM revealed reduction and disorganization of the chloroplast, variation in starch and polyphosphate granules, formation of vesicles and vacuoles, cytoplasm degradation, and cell wall continuity loss. The presence of M. aeruginosa was, for microalgae, an additional stress factor adding to the chemical stress produced by Faena®, increasing the damage in their morphology and ultrastructure. These results alert to the effects that can be caused by glyphosate and the presence of toxigenic bacteria on the algal phytoplankton in contaminated and anthropic and eutrophic freshwater ecosystems.

show abstract

Variación de los Organismos Fitoplanctónicos y la Calidad del Agua en el Lago de Chapala, Jalisco, México

Cited by 10 publications

References 10 publications

Eutrophication and Phytoplankton: Some Generalities from Lakes and Reservoirs of the Americas

Eutrophication and Phytoplankton: Some Generalities from Lakes and Reservoirs of the Americas

Variación espacio-temporal del fitoplancton del lago de Chapala, México, durante 2012

Changes in the morphology and cell ultrastructure of a microalgal community exposed to a commercial glyphosate formulation and a toxigenic cyanobacterium

Contact Info

Product

Resources

About