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Bishop Museum
Waipi‘o Valley Stream Restoration Study
A Collaboration of Scientists and Students

Large boulders after the floodingHow will this flood affect native stream animals and the stream? The stream channel has changed drastically since the students left Friday, March 12th. Large boulders have come down from the mountain, and slow-water pools have turned into fast-water riffles. Expect a very different looking stream next time you come to Hi'ilawe!

Drastic changes in the stream channel after the flood

Native animals are highly adapted to this type of flooding and will be just fine, as they have evolved to live in highly changeable streams. One beneficial aspect is that the alien species have less tolerance for flooding and can get swept out to sea. In fact, Ron and David saw many introduced green swordtail fish stranded on the roads right after the flooding, but we saw no native fish even though we know the streams contain many native 'o'opu (fish). The flood will benefit native stream species because the green swordtail fish carry many harmful parasites and eat young native 'o'opu and native insects.

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