相关实验视频

Updated: May 21, 2025

Laboratory Estimation of Net Trophic Transfer Efficiencies of PCB Congeners to Lake Trout Salvelinus namaycush from Its Prey

Laboratory Estimation of Net Trophic Transfer Efficiencies of PCB Congeners to Lake Trout Salvelinus namaycush from Its Prey

Published on: August 29, 2014

环境梯度的变化塑造了多层次的食物网结构:对湖泊生态系统中抗生素热量转移的影响

Sai Gao¹, Yu Zhao², Lulu Zhang³

¹State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Science, Beijing 100085, China; College of Environment Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei Province 050000, China.

Journal of hazardous materials

|March 22, 2025

概括

环境变化对水生食物网产生重大影响,改变了污染物转移. 这项研究揭示了环境变化如何推动食物网结构的变化,导致湖泊生态系统中类抗生素 (QN) 积累增加.

科学领域:

环境科学环境科学
生态毒理学生态毒理学
水生生态学水生生态学

背景情况:

环境变化改变了水生食物网结构和污染物热带转移.
对影响湖泊污染物转移的环境梯度的定量数据有限.

研究的目的:

调查环境因素的时间变化,食物网结构和昆龙抗生素 (QNs) 热带转移.
确定环境变化指数 (ECi),食物网动态和QN转移之间的关系.
阐明食物网结构在环境变化下调解污染物转移的机制.

主要方法:

收集了关于ECi,食物网结构 (相互作用强度,多样性指数) 和QN度的数据在2018-2023年间的Baiyangdian湖.
分析了这些参数的时间变化.
采用结构方程建模 (SEM) 来评估ECi对食物网结构和QN热带转移的直接和间接影响.

主要成果:

在2018年至2023年期间,在相互作用强度 (碎片,巨型植物) 和多样性指数中观察到显著的时间差异.
ECi与人口规模相互作用强度和生态系统规模多样性指数相关.
从2018年到2023年,QN的热带放大因子 (TMF) 显著增加.
SEM表示,ECi直接影响食物网结构,而QNs则间接影响TMF,环境因素是主要的调节因素.

结论:

环境变化显著改变了湖泊的食物网结构.
这些结构变化调解了类抗生素的热带转移.
环境因素是湖泊生态系统中污染物热带转移的关键驱动因素.

关键词:

抗生素抗生素是一种抗生素.环境变化环境变化湖泊生态系统湖泊生态系统多尺度的食物网结构.热带转移是因为热带转移.

更多相关视频

Examination of Host Phenotypes in Gambusia affinis Following Antibiotic Treatment

Examination of Host Phenotypes in Gambusia affinis Following Antibiotic Treatment

Published on: February 22, 2017

Characterization of a Pathogenic Escherichia coli Strain Derived from Oreochromis spp. Farms Using Whole-Genome Sequencing

Characterization of a Pathogenic Escherichia coli Strain Derived from Oreochromis spp. Farms Using Whole-Genome Sequencing

Published on: December 23, 2022

相关概念视频

Trophic Efficiency

Trophic Efficiency

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.

Trophic Levels

Trophic Levels

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.

Antibiotic Selection

Antibiotic Selection

Bacterial Transformation

Bacterial Transformation

In 1928, bacteriologist Frederick Griffith worked on a vaccine for pneumonia, which is caused by Streptococcus pneumoniae bacteria. Griffith studied two pneumonia strains in mice: one pathogenic and one non-pathogenic. Only the pathogenic strain killed host mice.
Griffith made an unexpected discovery when he killed the pathogenic strain and mixed its remains with the live, non-pathogenic strain. Not only did the mixture kill host mice, but it also contained living pathogenic bacteria that...

What are Biogeochemical Cycles?

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.

What is an Ecosystem?

What is an Ecosystem?