Invasive algae
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Invasive Algae. Coral Reef Degradation. Problems. Competes for crevices housing wildlife, can cover and shadow out corals. Uses nitrogen provided by coral to reproduce. Growth at 10% increase over coral in last year. All these lead to the degradation of coral reef and their ecosystems.

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Invasive algae l.jpg

Invasive Algae

Coral Reef Degradation


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Problems

  • Competes for crevices housing wildlife, can cover and shadow out corals.

  • Uses nitrogen provided by coral to reproduce.

  • Growth at 10% increase over coral in last year.

    • All these lead to the degradation of coral reef and their ecosystems


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The algae

  • Kappaphycus alvarezii

  • Gracilaria salicornia

  • Caulerpa brachypus


Kappaphycus alvarezii hawaii l.jpg
Kappaphycus alvareziiHawaii

  • Red algae

  • Extremely high growth rates, doubling in 15-30 days

  • Branches usually irregularly arranged, 3 - 18 cm long

  • Dominating the changing marine ecology


Gracilaria salicornia hawaii l.jpg
Gracilaria salicorniaHawaii

  • Red algae

  • Intertidal to subtidal 4 meters deep, attached to limestone and basalt substrates

  • Introduced to Kane‘ohe Bay and Waikiki in the 1970’s

  • Propagate sexually as well as asexually


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Caulerpa brachypusPacific (Florida)

  • Green algae (dark to light green in color)

  • Branches, feather-like, flattened, and upright, 3 - 10 cm high

  • Small patches grow in sandy areas of tidepools and reef flats

  • Has been designated a U.S. Federal Noxious Weed and currently prohibited in the U.S


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Current Projects

  • Coral Reef Assessment and Monitoring Program (CRAMP)

    • Founded in 1998 in Hawaii to monitor long-term changes in coral reef benthic communities.



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