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相关概念视频

Bioremediation00:46

Bioremediation

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Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
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Primary Production01:06

Primary Production

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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.
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What are Biogeochemical Cycles?00:54

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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.
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Plastic Behavior01:21

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A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
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Diversity of Protists III01:27

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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,...
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相关实验视频

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Sampling, Sorting, and Characterizing Microplastics in Aquatic Environments with High Suspended Sediment Loads and Large Floating Debris
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超的环境:塑料污染的遗忘息地

V Fagiano1, M Compa2, C Alomar2

  • 1Centro Oceanográfico de Baleares (IEO, CSIC), Muelle de Poniente s/n, 07015 Mallorca, Spain; University of Balearic Islands, Palma de Mallorca, Spain.

Marine pollution bulletin
|July 17, 2023
PubMed
概括

在地中海海洋保护区内的海底沉积物中,微塑料污染很高,纤维是最常见的类型. 这凸显了迫切需要解决海洋生态系统中纤维污染的问题.

关键词:
地边界层 (Benthic boundary layer) 是地边界层的一个边界层.纤维是一种纤维.超地环境 (Hyperbenthic environment) 是一种超地环境.微塑料是一种微塑料.沉积物 沉积物是一种沉积物.

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科学领域:

  • 海洋生物学 海洋生物学
  • 环境科学 环境科学
  • 海洋学 海洋学 海洋学

背景情况:

  • 微塑料 (MP) 污染在海洋生态系统中越来越令人担忧.
  • 了解MP在不同海洋环境中的分布对于有效管理至关重要.

研究的目的:

  • 调查各种海洋区域中微塑料的数量和成分.
  • 评估地中海沿海海洋保护区 (MPA) 的MP分布.

主要方法:

  • 在卡布雷拉海洋保护区内采集海底沉积物,高层和中水层的样本.
  • 对微塑料的数量和聚合物成分的分析.
  • 调查在波西多尼亚海洋植物 (Posidonia oceanica) 杂乱的草原上的采样地点.

主要成果:

  • 海底沉积物表现出明显更高的MP丰度 (378,769MP/m3) 与高层 (209MP/m3) 和中水层 (106MP/m3) 相比.
  • 观察到MP丰度的垂直梯度,向海底增加.
  • 纤维构成了占主导地位的MP类型,主要由聚乙烯 (PS),扩展聚乙烯 (EPS) 和纤维素酸 (CA) 组成.

结论:

  • 海底沉积物充当了微塑料,特别是纤维的重要沉积点.
  • 这些发现强调了对减轻海洋环境中纤维污染的战略的迫切需要.