Pacific Science Volume 41, Numbers 1-4, 1987

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Pacific Science is a quarterly publication devoted to the biological and physical sciences of the Pacific Region.


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    41: Index - Pacific Science
    (University of Hawaii Press, 1987)
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    41:1-4 Table of Contents - Pacific Science
    (University of Hawaii Press, 1987)
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    Characteristics of Water Quality in Anchialine Ponds of Kona, Hawaii Coast
    (University of Hawaii Press, 1987) Brock, Richard E. ; Norris, James E. ; Ziemann, David A. ; Lee, Michael T.
    A study of the water quality characteristics of anchialine ponds of the Kona, Hawaii, coast suggests that groundwater is a major source of dissolved nutrients for these systems. These groundwater sources apparently show high spatial and temporal variability with respect to dissolved nutrients. Changes are apparent in the water quality characteristics of one anchialine pond system that has been subjected to considerable surrounding development. These changes are within the range of natural variability suggesting that this perturbation, at least over the short term (ca. 9 years), is not damaging since these nutrients frequently occur naturally in excess of concentrations which would control biological processes. Within an anchialine pond system that we have studied, spatial variability in water quality may be explained by a simple model of groundwater dilution with proximity to the sea.
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    Stunted Cloud-forest in Taveuni, Fiji
    (University of Hawaii Press, 1987) Ash, J.
    The vegetation and microclimate of a stunted ridge-top cloudforest on Mt. Koroturanga (l210m), Taveuni, Fiji (Lat. l7 °S, Long. 180°) is described. Canopy heights decreased from about 30m at sea level to 10m at 1140m altitude and to 3-7m on the ridge and upper windward slopes. The stunted trees were of low height for their stem diameter, and had abundant epiphytic bryophytes. The upper windward slopes and ridge were usually cloud enveloped and had low temperature (c 17°C), high relative humidity (c94%) and high wind speed (c 5m S-1 at 15m height). Canopy height was closely correlated with estimated rates of leaf transpiration. The cloud-forest had abundant Freycinetia urvilleana in the upper canopy and included species restricted to this environment on a few peaks in Fiji, e.g. Ascarina swamyana and Medinilla waterhousei.
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    Nodule Biomass of the Nitrogen-fixing Alien Myrica faya Ait. in Hawaii Volcanoes National Park
    (University of Hawaii Press, 1987) Turner, Douglas R. ; Vitousek, Peter M.
    Myricafaya forms a nitrogen-fixing symbiosis in which fixation takes place in specialized root nodules. The biomass of these nodules was greater in open-grown than shaded individuals of Myricafaya, and was greater in large than small individuals. All Myricafaya examined, including seedlings and those growing epiphytically, had active nodules. Nitrogen fixation by invading Myrica faya could alter patterns of primary succession in Hawaii Volcanoes National Park.
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