长江流域水生生物资源恢复态势向好

Core Insights - The overall recovery of aquatic biological resources in the Yangtze River Basin is positive, with a significant increase in resource quantity and diversity [1] Group 1: Aquatic Biological Resources - In 2024, the unit resource quantity of the Yangtze River main stream is 2.3 kg, an increase of 9.5% compared to 2023 [1] - The resource quantity of the four major fish species (Qing fish, Grass fish, Silver fish, and Bighead fish) at the monitoring section in the middle reaches of the Yangtze River is 8.32 billion (tails), which is 6.2 times that of the pre-fishing ban in 2020 [1] Group 2: Biodiversity and Habitat - The integrity index of aquatic organisms in the Yangtze River Basin continues to improve, with the index for the Chishui River rated as "good" for three consecutive years [1] - From 2021 to 2024, a total of 344 indigenous fish species have been monitored in the Yangtze River Basin, an increase of 36 species compared to the pre-fishing ban period (2017 to 2020) [1] - The overall stability of habitats is reflected in the water quality evaluation, with 98.6% of the water quality sections rated as Class I-III, an increase of 0.1 percentage points from 2023 [1]