Lemon-scented Zieria  |  

Threats The Lemon scented Zieria is threatened by fire; browsing by native species; habitat loss; disturbance and modification; climate change; domestic and invasive species as well as the potential for disease introduction.

Threat Status and severity a Evidence Climate change Increased severity and Timing current Climate change projections show that southern Australia frequency of bushfire Confidence inferred is likely to experience harsher fire weather in the future (CSIRO 2015).

This type of event is increasingly likely to occur as a result of climate change.

Changes to Timing future Climate change projections show that southern precipitation and Confidence inferred Australia s climate will get hotter and drier; with time in increasing drought predicted to increase (CSIRO 2015).

Such temperatures Consequence major changes in climate are likely to cause forest decline; with Trend increasing drought stress leading to plant mortality (Choat et al.

In addition to the potential direct impacts of fire; increased risks of post fire herbivore impact and weed invasion are likely to further place the species at risk which were observed in post fire surveys in the Numeralla area (DPIE 2021).

Fire severity varied across the bushfire extent; with many patches burning at extreme severity while others remained unburnt (DPIE 2020).

Disease Phytophthora dieback Timing future While not currently impacted by any major diseases caused by root rot Confidence suspected (ANBG 2015); it may become susceptible to spreading or fungus (Phytophthora new diseases. cinnamomi and other Consequence major Phytophthora cinnamomi is an introduced soil borne Phytophthora spp.) Trend unknown pathogen; which infects a large range of plant species and Extent across the entire may contribute to plant death when other stresses are range present; such as waterlogging; drought and bushfire (DEE 2018).

The impacts of grazing are worse in drought range conditions for this species (OEH 2018).

Disease Phytophthora dieback Timing future While not currently impacted by any major diseases caused by root rot Confidence suspected (ANBG 2015); it may become susceptible to spreading or fungus (Phytophthora new diseases. cinnamomi and other Consequence major Phytophthora cinnamomi is an introduced soil borne Phytophthora spp.) Trend unknown pathogen; which infects a large range of plant species and Extent across the entire may contribute to plant death when other stresses are range present; such as waterlogging; drought and bushfire (DEE 2018).