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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...
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Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
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Related Experiment Video

Updated: Feb 25, 2026

Microalgae Cultivation and Biomass Quantification in a Bench-Scale Photobioreactor with Corrosive Flue Gases
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Minimising losses to predation during microalgae cultivation.

Kevin J Flynn1, Philip Kenny1, Aditee Mitra1

  • 1Swansea University, Swansea, SA2 8PP UK.

Journal of Applied Phycology
|August 5, 2017
PubMed
Summary

Minimizing zooplankton pest impacts on microalgal crops involves managing growth conditions. Strategic nutrient limitation can create crops that are less nutritious for pests, reducing crop losses.

Keywords:
BiofuelsMicroalgaeOptimisationPest controlPredator-preyProductionStoichiometric ecologyZooplankton

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Area of Science:

  • Aquaculture
  • Algaculture
  • Pest Management

Background:

  • Microalgal cultivation is vital for various industries, including biofuels and food.
  • Zooplanktonic pests can cause significant losses in commercial microalgal production.

Purpose of the Study:

  • To explore methods for minimizing the impact of zooplankton pests on commercial microalgal crops.
  • To understand the dynamics of algal and zooplankton growth under varying environmental conditions.

Main Methods:

  • System dynamics modeling was employed to simulate algal growth (light, nutrient availability) and zooplankton growth (crop abundance, nutritional quality).
  • Simulations analyzed crop losses under different growth scenarios and pest introduction timings.

Main Results:

  • Microalgal crop losses are minimized during rapid growth or slow growth under nutrient exhaustion.
  • Self-shading in dense cultures can lead to suboptimal light, favoring slow growth and increasing pest impact.
  • Early pest introduction into nutrient-sufficient cultures results in rapid crop collapse.

Conclusions:

  • Timing of pest introduction is critical; established, nutrient-exhausted cultures are more resilient.
  • Promoting mild phosphorus stress can yield microalgae that are suboptimal prey for zooplankton, reducing pest proliferation.
  • Managing light and nutrient availability is key to mitigating pest-induced losses in microalgal cultivation.