High Quality Content by WIKIPEDIA articles! Wallum, or Wallum country, is an Australian ecosystem of coastal south-east Queensland, extending into north-eastern New South Wales. It is characterised by floristically-rich shrubland and heathland on deep, nutrient-poor acidic sandy soils and regular wildfire. Seasonal changes in the water-table due to rainfall may create swamps. The name is derived from the Kabi word for the Wallum Banksia (Banksia aemula).Wallum, as with other coastal ecosystems, is highly threatened by the pressure for coastal development. Threats include clearing of land for residential development and pine plantations, alterations to drainage from adjacent developments, nutrients from fertilizers, changes in fire frequency, pollution from mosquito control sprays, and the introduction of weeds.