WANG Qianjia: Why Did a 30-km Wild Chinese Giant Salamander Appear in the Leshan Section of the Dadu River? Or Did It Come from Beifeng Mountains? | CBCGDF Reports

Recently, someone found a particularly large Chinese giant salamander (Andrias davidianus) by the river in a parking lot at a riverside (Dadu River) in Yangzhuba, Leshan City, Sichuan Province, and quickly called the police. The Chinese giant salamander is an amphibian that lives in freshwater. It is a unique species in China, a national second-level protected animal, and a critically endangered (CR) species on the IUCN Red List.

The police and experts quickly arrived at the scene. After careful inspection, it was confirmed that the big fish was a national protected animal - a wild giant salamander, 1.45 meters long and weighing 60 kilograms. With the help of the police and experts, it was safely transferred to a place suitable for its life and returned to nature.

The wild Chinese giant salamander has high requirements for its habitat, usually in streams with clear water, wide mountainous areas, flowing water, and many gravels of different sizes. Now it appears in the Leshan section of the Dadu River, which obviously does not meet its habitat requirements. As the lower reaches of the Dadu River, the Leshan section is polluted by urban domestic sewage and industrial wastewater. The water quality is turbid compared to the upper reaches, eutrophication is serious, and the dissolved oxygen content in the water is low. The giant salamander has extremely high requirements for water quality, and clear and oxygen-rich water is a necessary condition for their survival. Due to the interference of human activities, the riverbank vegetation in the Leshan section has been severely damaged, and natural shelters such as rocks and caves in the water have been reduced, and the habitat of the giant salamander has been compressed.

So why did it appeared there? The author found that the Beifeng Mountain is next to the site where the wild giant salamander was discovered. Is it possible that this giant salamander has been living in the clear streams in the Beifeng Mountain area, and was forced down the mountain after being disturbed by various projects? I look forward to the locals and people who know the giant salamander species to solve the puzzle.

The author finally makes a suggestion: the streams in the Beifeng Mountain area have a beautiful ecological environment and rich biodiversity. Taking this discovery of wild giant salamanders as an opportunity, it is recommended that the local government of Leshan, Sichuan or relevant scientific research institutions conduct stream eDNA monitoring of the water bodies in Beifeng Mountain.

Original article:https://mp.weixin.qq.com/s/K53keKBn8OCfg8EqP7ElEg

Translator: Daisy

Checked by Sara

Editor: Daisy

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