相关实验视频

Updated: Jun 4, 2025

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Published on: March 8, 2020

在南大西洋的棕色 (Sula leucogaster) 的微量元素和热带生态的岛际变异性

J A G Padilha¹, A P Almeida², J Souza-Kasprzyk³

¹CBMA - Centre for Molecular and Environmental Biology/ARNET-Aquatic Research Network & IB-S, Institute of Science and Innovation for Bio-Sustainability, Department of Biology, University of Minho, Campus Gualtar, Braga, Portugal.

Environmental pollution (Barking, Essex : 1987)

|January 4, 2025

概括

大西洋岛屿上的棕色鱼表现出不同的必需和非必需元素水平,卡加拉群体的污染物更高. 饮食习惯也因地点而有很大差异,表明不同的生态动态.

科学领域:

环境科学环境科学
生态毒理学生态毒理学
海洋生物学海洋生物学

背景情况:

海鸟是海洋生态系统健康的敏感指标.
了解海鸟中的元素度和稳定同位素,可以了解饮食和环境暴露.
棕色 (Sula leucogaster) 是大西洋的关键海鸟物种.

研究的目的:

为了研究基本元素和非基本元素度以及棕色波比羽毛中的稳定同位素组成.
评估污染物暴露和饮食习惯的地理,性别和成熟度相关变化.
确定影响三个大西洋岛屿地区棕色鸟种群的生态和环境因素.

主要方法:

对羽毛中基本元素 (Mg, Ca, Fe, Mn, Cu, Zn, Se, Ni) 和非基本元素 (Li, Be, Cr, Rb, Sr, Cs, Cd, Sn, Ba, Pb) 的分析.
稳定同位素分析 (δ13C,δ15N,δ34S) 用于确定饮食习惯和食物位.
包括SIBER (R中的稳定同位素贝叶斯圆) 在内的统计分析,以比较种群.

主要成果:

在微量元素度中观察到显著的地理差异,在卡加拉斯种群中Fe,Mn和Sn的含量更高.
在成年和青少年棕色乳头之间发现了Li,Mg,Rb和Zn度的明显差异.
与SPSP相比,SIBER的分析表明,Cagarras的海鸟在食物中占有更高的热量位置,这表明饮食变化.

结论:

大西洋岛屿上的棕色虫种群在元素负担和饮食模式上表现出显著的变化,受地理位置的影响.
卡加拉斯种群的污染物水平较高,可能与人为来源的接近有关.
持续监测对于评估对脆弱海鸟种群的长期影响和确保大西洋生态系统健康至关重要.

关键词:

生物积累生物积累生物积累暴露于污染物中的污染物海洋鸟类海洋鸟类稳定的同位素是稳定的.

更多相关视频

A Video Surveillance System to Monitor Breeding Colonies of Common Terns Sterna Hirundo

A Video Surveillance System to Monitor Breeding Colonies of Common Terns Sterna Hirundo

Published on: July 22, 2018

Determination of Total Lipid and Lipid Classes in Marine Samples

Determination of Total Lipid and Lipid Classes in Marine Samples

Published on: December 11, 2021

相关概念视频

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.

Speciation Rates

Speciation Rates

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.

Conservation of Declining Populations

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.

Optimal Foraging

Optimal Foraging

How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.