Pacific Science Volume 43, Number 2, 1989

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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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    43:2 Table of Contents - Pacific Science
    (University of Hawaii Press, 1989-04)
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    Altitudinal Limits of Life in Subtropical Mountains: What Do We Know?
    (University of Hawaii Press, 1989-04) Halloy, Stephan
    Present knowledge of the highest altitudinal limits of organisms and their causes is reviewed. Discussion focuses on subtropical latitudes (20- 30°) and altitudes above 4000 m. Methods used in high-altitude studies are limited by logistical and biological factors. Use of a comparative convergence-divergence method is encouraged. Terms such as "extreme" are inappropriate in the description of environments with moderate temperature amplitude, positive water balance, and rich soils but low atmospheric pressure. Characters such as slow productivity, frugal behavior, stress tolerance, crypts, large number of stomata, greater development of lungs and circulatory systems, hygromorphy, heliomorphy, protection, insularity, high diversity , and a decreasing plant/animal ratio are considered typical of organisms in these altitudes (hypsophily). Hypotheses explaining some of the characters are discussed.
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    A vrainvillea amadelpha (Codiales, Chlorophyta) from Oahu, Hawaii
    (University of Hawaii Press, 1989-04) Brostoff, William N.
    The siphonous green alga Avrainvillea is reported for the first time in Hawaii. The Hawaiian specimens are described and compared to A. amadelpha (Mont.) Gepp and Gepp and other Avrainvillea species elsewhere in the world. Although Hawaiian Avrainvillea differ in siphon diameter from A . amadelpha from other locations, on the basis of other characteristics A. amadelpha is the proper identification. Avrainvillea may be an alien species in Hawaii; if so, its mode of introduction is unknown.
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    Briania Gen. Nov. and Brianiafruticetum Sp. Nov.
    (University of Hawaii Press, 1989-04) Reynolds, Don R.
    The conidiogenous genus Briania is described as new with a single species, Briania fruticetum. Major characters of the Hawaiian fungus are erect setiform, branched phialophores formed in mycothickets on the surface of living leaves. The associated teleomorphic genus is Meliolina.
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