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Related Concept Videos

Green Algae01:21

Green Algae

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Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
346

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Development of an ecotoxicological test procedure for soil microalgae.

Vânia Carvalhido1, Márcia Bessa da Silva1, Marina Santos2

  • 1GreenUPorto - Sustainable Agrifood Production Research Centre, University of Porto, Campus de Vairão, Rua da Agrária 747, 4485-646 Vairão, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal.

The Science of the Total Environment
|April 19, 2021
PubMed
Summary

This study developed a new ecotoxicological test for soil microalgae, using Micractinium inermum. The validated procedure enhances chemical risk assessment for soil ecosystems.

Keywords:
Biological soil crustsCopperGlyphosateGrowth inhibition testsMicractinium inermum

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Area of Science:

  • Environmental Science
  • Ecotoxicology
  • Microbiology

Background:

  • Existing ecotoxicity guidelines lack soil algae testing.
  • Soil microalgae are vital for soil functions and ecosystem services.
  • Soil biological crusts (BSC) harbor diverse microalgal communities.

Purpose of the Study:

  • Develop and validate a standard operating procedure for soil microalgae ecotoxicological testing.
  • Address the gap in current ecotoxicity assessment guidelines.
  • Incorporate soil algae into chemical risk assessment frameworks.

Main Methods:

  • Isolation and characterization of soil microalgae and cyanobacteria from BSC.
  • Selection of Micractinium inermum for its wide distribution.
  • Growth curve analysis in liquid and solid media (OECD artificial soil).
  • Validation using reference substances (glyphosate and copper).

Main Results:

  • A reproducible ecotoxicological test procedure for soil microalgae was developed.
  • Micractinium inermum showed increased sensitivity when tested in artificial soil.
  • The procedure demonstrated reproducibility with reference chemicals, aligning with OECD 201:2011 in liquid media.

Conclusions:

  • The developed procedure provides a standardized method for assessing soil microalgae toxicity.
  • The findings support the inclusion of soil microalgae in ecotoxicity testing.
  • Further validation with natural soils and cyanobacteria is recommended.