海洋生产力和食用结构驱动深海鱼动物群中积的模式
Leandro N Eduardo1, Anaïs Médieu2, Arnaud Bertrand1
1MARBEC, Univ. Montpellier, CNRS, Ifremer, IRD, Sète, France.
The Science of the total environment
|March 1, 2026
概括
海洋生产力影响深海鱼物种的 (Hg) 积累. 较长的食物链和生产力较低的地区,如费尔南多·德·诺罗纳山脊,与生产力较高的地区相比,Hg水平更高.
科学领域:
- 海洋生态海洋生态学
- 生物地质化学生物地质化学
- 环境毒理学环境毒理学
背景情况:
- (Hg) 是一种普遍存在的全球污染物,影响海洋生态系统和人类健康.
- 深海类物种是Hg向顶级捕食者的关键载体,但这些社区的Hg积累驱动因素尚不清楚.
- 现有的关于深海生态系统中的数据很少,未解决的生态和生物地质化学影响.
研究的目的:
- 为了测试海洋生产力驱动深海鱼物种积的假设.
- 调查深海鱼动物群中热带结构和Hg度之间的关系.
- 为了比较不同生产率水平的不同海洋地区的Hg动态.
主要方法:
- 在西部热带大西洋的深海鱼物种中分析总Hg度.
- 稳定同位素分析 (δ15N和δ13C) 来确定热量结构和食物网架构.
- 在寡量化 (费尔南多·德·诺罗纳山脊) 和生产性 (亚马逊河口) 区域之间比较Hg水平.
主要成果:
- 海洋的生产力显著塑造了食物网架构,在寡头营养区的食物链较长.
- 与亚马逊河口地区相比,在寡质的费尔南多·德·诺罗纳山脊中,度明显高于亚马逊河口地区.
- 深海类物种通常表现出较高的Hg积累比 epipelagic 种类,受 trofhic 协会和垂直分布的影响.
结论:
- 海洋生产力,食物链长度和基于碎片的途径是深海鱼物种积的关键驱动因素.
- 深海生态系统作为的重要储存和载体,对海洋野生动物和人类消费者构成风险.
- 调查结果强调了需要有针对性的监测和风险评估在鱼食物网中的,特别是在海洋变化的背景下.
相关概念视频
Primary Production
25.8K
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.
25.8K
Trophic Efficiency
25.6K
Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
25.6K
Trophic Levels
38.3K
All organisms in an ecosystem occupy a trophic level in the food chain. The lowest level consists of primary producers, which synthesize their food from either solar or chemical energy. Each subsequent level obtains energy from the levels below. Detritivores can occupy any of the levels above primary producers.
38.3K
The Periodic Table and Organismal Elements
23.2K
Elements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally occurring, and only a few of them are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.
Periodic Table Provides Information...
Periodic Table Provides Information...
23.2K
Diversity of Protists III
1.4K
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
1.4K
What is an Ecosystem?
47.7K
Overview
47.7K


