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2016-12-12 General Committee - Attachment 1 to Item 6 - Biodiversity Assessment Report
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Noosa Biodiversity Plan – Biodiversity Assessment Report reduce leaf palatability. Hovenden and Williams (2010) predicted dramatic consequences for browsing mammals. It has been suggested that koalas may no longer be able to meet their nutritional requirements in the future, leading to malnutrition and starvation (IUCN Species Survival Commission, 2009). This is particularly concerning given that lactating female koalas already eat 35% more leaves to meet their raised nutritional requirements during this period. It may be possible to partially offset these impacts by preferentially planting eucalypts with a high nitrogen content and low phenol content in koala habitat areas. More frequent and extensive damage to riparian and wetland areas The extensive riparian and wetland ecosystems of the Noosa Shire are expected to experience more frequent damage in the future, due to heavier rainfall events and more extensive and destructive flooding (SCC, 2010, Low, 2011). Rainfall events of greater intensity will increase the extent and intensity of wetland silting, loss of soil and nutrients from riparian ecosystems, and result in a greater potential for weed invasion into riparian and wetland areas (Low 2011). More frequent weed incursions Remnant and regrowth ecosystems within the Noosa Shire, particularly those in agricultural and riparian areas, will become more susceptible to weed invasion in the future, due to increased storm damage (Steffen et al., 2009). Small rainforest remnants and riparian forests are especially prone to weed invasion because of the fertile soils they grow on. The increased damage to rainforests in particular, provide ideal opportunities for invading weeds to alter ecosystem dynamics and functioning (Low, 2011). Camphor laurel Cinnamomum camphora, cats-claw creeper Macfadyena unguis-cati, and Chinese elm Celtis sinensis are some local examples of weeds that are highly invasive on rainforest edges and could increase their competitive edge under climate change (Low, 2011). In rural areas, weeds have more potential to benefit from bird dispersal than native species. © ECO LOGICAL AUSTRALIA PTY LTD 132
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