Preface

TL;DRAbstract

Eilif Dahl had one of the most original and creative minds in plant geography, as well as in plant sociology and mountain ecology. His approach to plant geography went far beyond the description of distribution patterns and the establishment of correlations between distributions and particular climatic variables. He always strove to try to understand what the underlying physiological mechanisms were that influenced and controlled the observed distributional patterns. He proposed that many mountain plants are restricted to high elevations because of their intolerance to high maximum summer temperatures in the lowlands. He suggested that thermophilous species are restricted in their range by temperature dependent ATP production during dark respiration. He hypothesised that many eastern boreal species are absent from western oceanic areas because of the inability of the species to cope with alternating mild and cold periods in winter and spring. He also strongly championed the importance

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