Re-establishment of Protea repens after clearing invasive Acacia saligna: Consequences of soil legacy effects and a native nitrophilic weedy species

摘要: Abstract Invasive Australian acacias can alter soil chemistry and microbial communities in areas they invade. After clearing invasive acacias, these changes persist, previously invaded become dominated by nitrophilic weedy species. Restoration of viable native plant cleared sites often fails due to a lack species re-establishment. Therefore, improve restoration outcomes, it is important understand the effects chemical biotic legacies, species, on To investigate effect we germinated grew Protea repens seedlings (a proteoid shrub) as an indicator taken from Acacia saligna lowland fynbos, well non-invaded under controlled conditions. sterilized half each or area. We Ehrharta calycina grass species) treatment measured treatments P. germination growth. Germination percentage, root shoot dry mass did not significantly differ between altered chemistry. The percentage was greater (93%) presence than their absence. E. increased (29%) root-to-shoot ratio Since legacy have direct negative growth; conclude that efforts do always manage after A. saligna.