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靠近海岸的使用增加了两种鱼物种在持续有机污染物积累的倾向

Kady Lyons¹, Piper Rackley², Antonella Preti³

¹Georgia Aquarium, Center for Species Survival, 225 Baker St NW, Atlanta, GA, USA.

The Science of the total environment

|May 17, 2025

概括

普通鱼比双眼鱼积累的持久性有机污染物 (POP) 高,靠近岸边影响多双 (PCB) 和二二三乙 (DDX) 的积累.

科学领域:

海洋生物学海洋生物学
生态毒理学生态毒理学
化学生态化学生态学

背景情况:

持久性有机污染物 (POPs) 根据养生态在捕食者组织中积累.
稳定同位素为消费者生态提供了互补的地理和热量数据.
小鱼 (Alopias spp.) 是一种鱼. 显示出不同的空间息地偏好.

研究的目的:

调查生态差异,特别是近岸使用,如何影响普通鱼 (Alopias vulpinus) 和双眼鱼 (Alopias superciliosus) 中的POP积累.
利用稳定的同位素和POP作为化学标记物来区分物种的生态和污染物负载.
评估息地使用和内在因素对PCB和DDX积累的影响.

主要方法:

分析了加利福尼亚州南部偶然捕获的鱼的肝脏样本.
一系列有机污染物的量化,包括PCB和DDX.
测量稳定同位素 (δ13C和δ15N) 以推断饮食和息地信息.

主要成果:

与双眼鱼相比,普通鱼表现出所有检查的污染物组的度显著更高.
观察到特定物种的污染物特征,具有明显的同位素利基空间.
DDX度与δ13C正相关,表明近岸使用与污染物积累之间存在联系.

结论:

靠近岸边是鱼肝脏POP积累的一个关键因素.
息地使用中的生态差异显著影响普通和双眼鱼之间的污染物概况.
性别等内在因素也可能在POP积累模式中发挥作用.

关键词:

二二三甲二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二二埃拉斯莫的分支机构聚化双烯的多种类型稳定的同位素分析.热带生态学热带生态学

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Primary Production

Primary Production

The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.

Production Efficiency

Production Efficiency

Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).