(including reliance on groundwater supplies’ salinity) (Logan fact sheet), poor groundwater quality (including high salinity) may impair MI population persistence. Seasonal 13. As MI plants are thought to have a ) 1 1 1 table deep root system and may have ‘some fluctuations reliance on groundwater supplies’ (Logan fact sheet), excessive or sustained groundwater drawdown may impair the species’ population persistence. Flow regime of 14. Assuming overbank flows from 1 Purga Creek Purga Creek are relevant to the wetland and the MI forest, altered flow regimes may change inundation patterns, impairing MI population persistence. Agriculture Extraction of 15. Groundwater extraction for 1 bordering groundwater agricultural use may the water the Nature table, reducing access by MI plant Reserve roots and impairing the species’ population persistence. Extraction of 16. Surface water extraction from the 1 surface water Bremer River and Purga Creek for agricultural use may reduce the very occasional flooding from the river into the wetland, altering the inundation regime and impairing MI population persistence. Increased 17. Agricultural chemicals carried in 1 contamination runoff are likely to impair MI population risk from persistence. chemicals Increased 18. Land clearance for agriculture ) 1 1 1 edge effects around the Nature Reserve causes from land edge effects: clearance, communities are likely to be “MI tracks, fence negatively impacted by edge effects lines, etc. for such as weed invasion, increase in agriculture. wind and evaporation, and changes to solar radiation and temperature changes”. Altered rates 19. Sedimentation from agricultural 1
(including salinity) reliance on groundwater supplies’ (Logan fact sheet), poor groundwater quality (including high salinity) may impair MI population persistence. Seasonal table fluctuations 13. As MI plants are thought to have a deep root system and may have ‘some reliance on groundwater supplies’ (Logan fact sheet), excessive or sustained groundwater drawdown may impair the species’ population persistence. ) 1 1 1 Flow regime of Purga Creek 14. Assuming overbank flows from Purga Creek are relevant to the wetland and the MI forest, altered flow regimes may change inundation patterns, impairing MI population persistence. 1 Agriculture bordering the Nature Reserve Extraction of groundwater 15. Groundwater extraction for agricultural use may the water table, reducing access by MI plant roots and impairing the species’ population persistence. 1 Extraction of surface water 16. Surface water extraction from the Bremer River and Purga Creek for agricultural use may reduce the very occasional flooding from the river into the wetland, altering the inundation regime and impairing MI population persistence. 1 Increased contamination risk from chemicals 17. Agricultural chemicals carried in runoff are likely to impair MI population persistence. 1 Increased edge effects from land clearance, tracks, fence lines, etc. for agriculture. 18. Land clearance for agriculture around the Nature Reserve causes edge effects: “MI communities are likely to be negatively impacted by edge effects such as weed invasion, increase in wind and evaporation, and changes to solar radiation and temperature changes”. ) 1 1 1 Altered rates 19. Sedimentation from agricultural 1
modelling-water-related-ecological-responses-csg-extraction.docx