基于Mann-Kendall法的中国渔业生态环境状况变化趋势分析OA

The fishery environment is fundamental to the survival and reproduction of aquatic organisms and underpins the sustainable development of fisheries.To systematically assess long-term change trends in China's fishery ecological environment,we applied the Mann-Kendall trend test to analyze major water quality indicators in key marine and inland fishery waters,as well as national aquatic germplasm resources reserves,based on continuous monitoring data from the Report on the state of the Fishery Eco-Environment in China(2000-2024).Results indicate that in major marine fishery areas,the proportion of waters meeting the standards for inorganic nitrogen,active phosphate,chemical oxygen demand(COD),and petroleum hydrocarbons generally showed an upward trend,with significant improvements for active phosphate and petroleum hydrocarbons.Inorganic nitrogen remained the primary exceedance factor.The water quality of key inland fishery waters improved overall.Significant improvements were observed in the proportion of waters up-to-standard for non-ionic ammonia,permanganate index,and petroleum hydrocarbons in river fishery waters,and for petroleum hydrocarbons in lake/reservoir fishery waters and national aquatic germplasm resource reserves(inland).However,exceedances of total nitrogen(TN),total phosphorus(TP),and permanganate index remained prominent in some waters.Overall,the quality of fishery ecological environment in China has shown a positive trend.On the other hand,nitrogen and phosphorus nutrients exceedance remain the primary environmental pressures,and gaps in monitoring coverage still exist in national aquatic germplasm resource reserves.This suggests an urgent need to upgrade monitoring systems,improve evaluation standards,and advance digital-intelligent capacity building at national aquatic germplasm resources reserves to promote precise protection of fishery ecological environment.