The toxic impacts of microplastics-borne benzo[a]pyrene and heavy metals on the health and behavior of seahorse Hippocampus erectus  

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作  者:Ying LIU Nan LI Dongwei SHANG Yanjing YANG Pei CUI Jinhui SUN 

机构地区:[1]Tianjin Key Laboratory of Green Ecological Feed,Tianjin Agricultural University,Tianjin 300384,China [2]Tianjin Fisheries Research Institute,Tianjin 300000,China [3]Tianjin Nongken Bohai Agricultural Group Co.,Ltd.,Tianjin 301809,China

出  处:《Journal of Oceanology and Limnology》2025年第2期559-571,共13页海洋湖沼学报(英文)

基  金:Supported by the Marine Economic Development Project(No.GDNRC[2022]36);the National Key Research and Development Program of China(No.2018YFD0900206);the Tianjin Science and Technology Program Project(No.21YDTPJC00340)。

摘  要:Marine pollution poses a critical threat to biodiversity.The synergistic effects of microplastics,specifically high-density polyethylene(HDPE),combined with benzo[a]pyrene(B[a]P)and heavy metals,on the physiology and feeding behavior of the seahorse,Hippocampus erectus were studied.The growth parameters,pollutant bioaccumulation,enzymatic response,and feeding dynamics were extensively analyzed.Seahorses exposed to microplastics-borne B[a]P and heavy metals exhibited notable reductions in body length and weight,as well as in survival rates,indicating severe stress from these contaminants.The accumulation of pollutant particularly B[a]P in seahorse exceeded China’s national regulatory limit of 5μg/kg,and the B[a]P accumulation in seahorses was obviously aided by HDPE microplastics,posing a risk to marine organisms and human health via the food chain.The adaptive response of the seahorses was evident shown in the elevation of antioxidant enzyme activities,which is a biological mechanism to mitigate oxidative stress induced by the pollutants.However,this physiological adaptation comes at a cost,as evidenced by marked changes in the feeding behavior.Results show that the efficiency and frequency of feeding were greatly reduced,indicating a heavy impact on the ecological role and survival of this marine creature in polluted habitats.This research offers a crucial perspective on the compound threats of microplastics and associated pollutants in marine ecosystems.It highlights the urgent need develop comprehensive strategies to address these environmental issues.The findings are an important contribution to ecotoxicology,providing a deeper understanding of how microplastics act as vectors for other contaminants and their profound effects on marine life,especially species like seahorses.This study calls for action to strengthen environmental policies and practices aimed at mitigating the impact of marine pollution.

关 键 词:microplastics(MP) heavy metal benzo[a]pyrene(B[a]P) SEAHORSE synergistic effect 

分 类 号:X55[环境科学与工程—环境工程] X503.225

 

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