Algal Chemical Defense Against Herbivores: Allocation of Phenolic Compounds in the Kelp Alaria marginata

@article{Steinberg1984AlgalCD,
  title={Algal Chemical Defense Against Herbivores: Allocation of Phenolic Compounds in the Kelp Alaria marginata},
  author={Peter D. Steinberg},
  journal={Science},
  year={1984},
  volume={223},
  pages={405 - 407}
}
  • P. Steinberg
  • Published 27 January 1984
  • Biology, Medicine
  • Science
Higher concentrations of phenolic compounds were found in the reproductive fronds (sporophylls) of the intertidal kelp Alaria marginata than were found in the vegetative blades. The sporophylls were consumed by herbivorous snails at a lower rate than were the vegetative blades, in both field and laboratory studies. These results indicate that differential internal production of defensive compounds in a marine alga can significantly affect the pattern of herbivory on the plant. 
Chemical defenses and the susceptibility of tropical marine brown algae to herbivores
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The low levels of phenolics present in the tropical species that I analyzed may also explain recent results demonstrating that tropical Sargassum and Turbinaria are often preferentially consumed by herbivorous fishes and echinoids.
HERBIVORE GRAZING INCREASES POLYPHENOLIC DEFENSES IN THE INTERTIDAL BROWN ALGA FUCUS DISTICHUS
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In three sublittoral populations of the brown alga Fucus vesiculosus (L.) collected from the northern Baltic Sea between May and September 1982, the accumulation of phenolic compounds correlated inversely with nitrogen content of thallus; higher phenolic contents were on average found under nitrogen deficiency.
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The level of the compounds found varies with the tissue examined with the highest concentrations being observed in young growing leaves (intermediate leaf blades) and the environmental conditions (abiotic factors and “stress” conditions).
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FEEDING PREFERENCES OF TEGULA FUNEBRALIS AND CHEMICAL DEFENSES OF MARINE BROWN ALGAE
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Feeding preferences of Tegula funebralis for brown algae are primarily due to avoidance of algal defenses; positive aspects of food quality (such as attractants or nutritional content) probably play a lesser role in determining preference.
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Le but de l'etude est de verifier si les parties reproductives de Fucus vesiculosus sont plus riches en phenols que les parties vegetatives
Chemical defense in tropical green algae, order Caulerpales
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It is concluded that chemical defense IS a major factor in the sumval of marine algae within this order.
Within-plant variation in palatability and chemical defenses in the green seaweed Avrainvillea elliottii
TLDR
The results provided added evidence supporting the ability of siphonaceous or coenocytic green macroalgae to concentrate defensive chemicals in growing parts and supported the prediction that stronger chemical defenses occur in the more apical and younger areas of the thallus (margins).
Seaweed Adaptations to Herbivory
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Seaweeds minimize damage from herbivores by any of three strategies (Lubchenco and Gaines 1981); they can escape in space or time so they do not co-occur with important Herbivores or are not detected when they do co-Occur.
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