'Ohi'a Dieback in Hawaii: 1984 Synthesis and Evaluation

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1985-04
Authors
Mueller-Dombois, Dieter
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University of Hawai'i Press
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Attention is first drawn to the state of knowledge in 1981 of the Hawaiian Metrosideros polymorpha ('ohi'a) stand dieback. New findings that have largely been developed or published since then are described; these encompass vegetation, soils, hydrology, climatology, and experimental, historical and evolutionary research. A brief comparison of canopy dieback in Hawaii with that in other forest systems is made. New facts on the Hawaiian dieback are summarized within the context of climatic instability, soil, and stand factors . These facts are then related to ideas of environmental disturbance, disease , and cohort senescence. There are strong indications that the primary factor causing 'ohi'a dieback develop s in the dieback population itself due to synchronized aging of cohort stands. External abiotic (environmental) and biotic stress factors (insects and fungal pathogens) appear to play secondary and/or subsidiary roles , respectively. Based on this new knowledge, policy and management considerations are discussed with regard to the role of dieback and its impact on preserve design, forest hydrology, and soil fertility . Finally, a number of recommendations are made for new management-related research and for further research into the etiology of canopy dieback.
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Mueller-Dombois D. 1985. 'Ohi'a dieback in Hawaii: 1984 synthesis and evaluation. Pac Sci 39(2): 150-170.
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