Dolphin Mass: Understanding the Impact of Climate Change on River Dolphins in Lake Tefé

The recent crisis in Lake Tefé has led to a devastating mass mortality event among river dolphins, with 104 animals being necropsied and tissue samples sent to specialized laboratories for analysis. While the investigation into the algae's possible role in the environmental and health emergency is ongoing, early findings suggest that the animals have not been affected by toxins produced by these organisms.

However, other factors are believed to be at play. The water temperature of Lake Tefé reached a record high of close to 40°C, causing thermal stress in the animals. This extreme heat, combined with the effects of El Niño and extreme drought, has resulted in a 10% loss of the local dolphin population.

Researchers from the Mamirauá Sustainable Development Institute (IDSM) and other organizations are working tirelessly to mitigate the impacts of this environmental and health emergency. They have identified an unusual number of Euglena sanguinea algae, which produces a toxin that can cause mortality in fish, at one point in the lake.

The Environmental Operation Sector is monitoring water, fish, and phytoplankton, while the Dead Sector aims to identify and search for carcasses in the region. The Alive Operation Sector monitors groups of pink and tucuxi river dolphins along Lake Tefé, rescuing individuals with signs of abnormality and taking them to rehabilitation facilities.

The recent mass mortality event is a stark reminder of the devastating impact of climate change on river dolphin populations. As temperatures continue to rise, it is essential that we take immediate action to address this crisis and protect these endangered species.

In conclusion, the recent dolphin mass in Lake Tefé highlights the urgent need for environmental conservation efforts to mitigate the effects of climate change on river dolphin populations. Further research into the causes of this event and its impacts on the local ecosystem is crucial to developing effective strategies for protecting these vulnerable species.

Dolphin mass