Cultivable bacteria in the supraglacial lake formed after a glacial lake outburst flood in northern Pakistan / Bacterias cultivables en el lago supraglacial formadas después de una inundación repentina en un lago glacial en el norte de Pakistán
Int. microbiol
; 26(2): 309-325, May. 2023. mapas
Artigo
em Inglês
| IBECS
| ID: ibc-220224
Biblioteca responsável:
ES1.1
Localização: ES15.1 - BNCS
ABSTRACT
Recently, a supraglacial lake formed as a result of a glacial lake outburst flood (GLOF) in the Dook Pal Glacier. Lake debris and meltwater samples were collected from the supraglacial lake to determine bacterial diversity. Geochemical analyses of samples showed free amino acids (FAAs), anions, cations, and heavy metals. Comparable viable bacterial counts were observed in meltwater and debris samples. Using R2A media, a total of 52 bacterial isolates were identified 40 from debris and 12 from meltwater. The relative abundance of Gram-positive (80.8%) bacteria was greater than Gram-negative (19.2%). Molecular identification of these isolates revealed that meltwater was dominated by Firmicutes (41.6%) and Proteobacteria (41.6%), while lake debris was dominated by Firmicutes (65.0%). The isolates belonged to 14 genera with the greatest relative abundance in Bacillus. Tolerance level of isolates to salts was high. Most of the Gram-positive bacteria were eurypsychrophiles, while most of the Gram-negative bacteria were stenopsychrophiles. Gram-negative bacteria displayed a higher minimum inhibitory concentration of selected heavy metals and antibiotics than Gram-positive. This first-ever study of culturable bacteria from a freshly formed supraglacial lake improves our understanding of the bacterial diversity and antibiotic resistance released from the glaciers as a result of GLOF.(AU)
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Coleções:
Bases de dados nacionais
/
Espanha
Base de dados:
IBECS
Assunto principal:
Bactérias
/
Resíduos
/
Resistência Microbiana a Medicamentos
/
Lagos
/
Inundações
Limite:
Humanos
País/Região como assunto:
Ásia
Idioma:
Inglês
Revista:
Int. microbiol
Ano de publicação:
2023
Tipo de documento:
Artigo
Instituição/País de afiliação:
Lanzhou University/Peoples Republic of China