The altitudinal distribution of bryophytes and lichens on Secretary Island is discussed, and comparisons are made with the region traversed by the Manapouri — Deep Cove track. The poverty of both species and individuals of lichens on Secretary Island and, to an even more marked degree, at Deep Cove, is probably caused by high rainfall favouring bryophytes. It is suggested that the near absence ofSphagnum,Marchantia, and related thallose hepatics from Secretary Island, and the comparative rarity of the mossesWeymoutbia mollis(epiphytic) andThuidium(terrestrial) indicates either that the island receives lower rainfall or that lower light intensities prevail on the forest floor than in the Manapouri — Deep Cove area.
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