The researchers studied the biodiversity in Qingyihe River at Xuchang section. They looked at different plants and animals in the water and on the riverbanks, as well as the water and sediment quality. They found that the communities of plants and animals changed a lot depending on factors like ammonia levels, temperature, and heavy metals in the water and sediment. Different species were affected by different environmental factors. The water in the river was polluted, and the variety of plants and animals was low. It's important to clean up the wastewater along the river and protect and restore the communities of plants and animals.