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Keywords:flora, landschap, landscape, pionier, pioniersvegetatie, bosvorming, pioneer, Zachte Berk, Downy birch, Bouleau pubescent, Moor-Birke, Betula pubescens, Berkenfamilie, Betulaceae, boom, tree, pionierboom, voedselarme grond, IJsland, Iceland, mos, moss, basalt, vulkanisch, vulcanic, spoelvlakte, plain