Biological assessment of Kahana Stream, Island of O'ahu, Hawai'i: An application of PABITRA survey methods
Date
2005-04
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Narrator
Transcriber
Annotator
Journal Title
Journal ISSN
Volume Title
Publisher
University of Hawaii Press
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
Aquatic biologists surveyed Kahana Stream on O'ahu, Hawai'i, during December 2001 and January, March, and May 2002 to provide a background of information before restoring water diverted from the headwaters of the stream since the mid-1920s. Kahana Stream has all but one species of macrofauna common in unaltered Hawaiian streams, but abundance and distribution of amphidromous species differ conspicuously. A single specimen of 'o'opu 'alamo'o (Lentipes concolor) was found near the headwaters; until recently, this species was regarded as extinct on O'ahu. Only two individuals of the freshwater limpet (hihiwai, Neritina granosa) were found, and the brackish-water limpet (hapawai, Neritina vespertina) was not observed. Construction of the Waiahole Ditch Tunnel about 80 yr ago reduced the amount of water entering Kahana headwaters, and unimpeded growth of hau (Hibiscus tiliaceus) from the shore into the stream has slowed water movement in the middle and lower sections of the stream and estuary. Reduced flow has resulted in an extension farther inland of certain estuarine and lower-reach species (the prawn Macrobrachium grandimanus and fishes Eleotris sandwicensis and Stenogobius hawaiiensis). Alien fishes and larger invertebrates occur throughout Kahana Stream. Catches of newly hatched fish (S. hawaiiensis) and invertebrates (limited to crustaceans) moving downstream toward the ocean were meager. Recruitment of animals moving from the sea into the stream included only crustaceans and a single individual fish (S. hawaiiensis). Benthic algae were considerably more diverse than recorded for other O'ahu streams. Hau removal and extensive trimming at key locations along Kahana Stream should precede the addition of water to the basin to avoid flooding and to enhance beneficial biological effects.
Description
Keywords
Pacific-Asia Biodiversity Transect Network., Ecosystem management--Hawaii--Kahana Stream (Oahu)., Biogeography--Hawaii--Kahana Stream (Oahu)., Natural history--Periodicals., Science--Periodicals., Natural history--Pacific Area--Periodicals.
Citation
Fitzsimmons JM, Parham JE, Benson LK, McRae MG, Nishimoto RT. Biological assessment of Kahana Stream, Island of O'ahu, Hawai'i: An application of PABITRA survey methods. Pac Sci 59(2): 273-281.
Extent
10 pages
Format
Geographic Location
Time Period
Related To
Related To (URI)
Table of Contents
Rights
Rights Holder
Local Contexts
Collections
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.