Yeasts isolated from the South Saskatchewan, a polluted river

Abstract

Minimum numbers of yeasts isolated from the Saskatchewan River in the summers of 1964 and 1965 ranged from 400 to 500 cells/liter upstream from the city of Saskatoon, to 4600 cells/liter immediately downstream. In the summer of 1968, a period of extremely low water, the counts were 150 cells/liter upstream from the city and 30 000 cells/liter downstream.Proton magnetic resonance spectra of the mannose-containing polysaccharides from representative cultures of the different species isolated were used as an aid in classification. Most of the species were asporogenous, and included representatives of the genera Candida, Trichosporon, Rhodotorula, Torulopsis, and Cryptococcus. Some species of Pichia, Saccharomyces, and Debaryomyces were isolated. The yeasts were mostly introduced into the river with the effluent from the Saskatoon sewage system.

Yeast and Macroinvertebrate Communities Associated with Leaf Litter Decomposition in a Second Order Stream

“…In addition to filamentous fungi, yeast and yeast-like organisms are common inhabitants of aquatic environments (SPENCER et al, 1970). Whereas basidiomycetous yeasts appears ubiquitous, ascomycetous seem more responsive to the concentration of organic debris (LACHANCE and STARMER, 1998).…”

Caracterização de leveduras do gênero Trichosporon isoladas de três regiões costeiras do Estado de São Paulo

“…Considerando que as leveduras são abundantes em águas costeiras (COOKE, 1960;SPENCER et al, 1970;AHEARN, 1973), sua presença pode estar relacionada ao arrasto da terra pelo rios e canais, bem como de resíduos domésticos e industriais que aumentam os nutrientes para água do mar.…”

“…A poluição presente na Baixada Santista, causada principalmente pela presença do porto de , 1996;SHIBATA et al, 2004;RIVERA et al, 2008). Spencer et al (1970) (GALVÃO et al, 2006) e, principalmente, como suporte para gestão ambiental.…”

“…Isso se deve ao fato de que esses vírus são mais resistentes aos processos de tratamento de água do que as bactérias indicadoras convencionais (ROMERO et al,1990). Considerando que as leveduras são abundantes em águas costeiras (COOKE et al, 1960;SPENCER et al, 1970;AHEARN, 1973) informaram que este fato pode estar relacionado ao arrasto da terra pelos rios e canais, bem como de resíduos domésticos e industriais que aumentam os nutrientes para água de mar.…”