One of the Amazon River’s main tributaries has dropped to its lowest level ever recorded Brazil’s geological service said on Friday.

The river port in the Amazon rainforest's largest city of Manaus on Friday hit its lowest level since 1902, as a drought drains waterways and snarls transport of grain exports and essential supplies that are the region's lifeline.

The environmental risks of dredging include ecosystem disruption, increased erosion, water contamination, and harm to aquatic species such as manatees and river dolphins.

A major port in the Amazon rainforest is seeing itslowest water level in 122 years due to drought:: Manaus, Brazil::Below-average rainfall - even through the rainy season - has plagued the Amazon and much of South America since last year,

Brazil’s geological service says that one of the Amazon River’s main tributaries has dropped to its lowest level in 122 years, reflecting a severe drought that has devastated the Amazon rainforest and

A drone view shows boats stranded on the Rio Negro as the river reached its lowest point in its history during the most intense and widespread drought the country has experienced since records began in 1950,

Below-average rainfall — even through the rainy season — has plagued the Amazon and much of South America since last year, also feeding the worst wildfires in more than a decade in Brazil and Bolivia.