Effects of Clearing Treatment on Seed Banks of the Alien Invasive Shrubs Acacia saligna and Acacia cyclops in the Southern and South-Western Cape, South Africa

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Abstract
Populations of buried viable seeds of Acacia cyclops and A. saligna, invasive aliens of fynbos, were estimated to assess the effects on them of different shrub-clearing treatments. Seed populations of both species declined significantly after 1 year with burning, but in general, not thereafter. Seed banks of A. cyclops, but not of A. saligna, were reduced by shrub felling alone after 1 year, apparently because a high proportion of seeds do not have seed-coat induced dormancy, and thus germinate immediately.

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