Table 2. Summary of 2015–16 watering actions targeting stream metabolism and generic ecosystem functioning in Selected Areas. Selected Area Dates Flow Commonwealth Monitored Expected ecological outcome Observed ecological Influences component environmental site(s) outcomes type water volume delivered (GL) Goulburn River 01/07/15 Fresh 10.661 McCoy’s Support ecosystem function to commencement – (lower river 08/07/15 Bridge of data collection in channel) August 2015. Goulburn River 09/07/15 Base 10.549 McCoy’s Support ecosystem function Small increases in rates Increased rates due to – (lower river 02/10/15 Bridge of primary production increasing water channel) (GPP) and ecosystem temperatures and longer respiration (ER). days coupled with possible enhanced nutrient and organic carbon availability. Goulburn River 03/10/15 99.139 Bridge Support ecosystem function Rates depressed by large Eventual rate increased due – (lower river 29/10/15 dilution effect but to increasing water channel) increasing on the temperatures and longer receding limb of the days coupled with possible hydrograph. enhanced nutrient and organic carbon availability. Goulburn River 30/10/15 Base 0.915 McCoy’s Support ecosystem function Rates generally increased Unable to distinguish effects – (lower river 12/03/16 Bridge over this period. of watering action from channel) seasonal changes. Goulburn River 15/03/16 Base 26.961 McCoy’s Support ecosystem function Rates depressed by Lack of response in GPP on – (lower river 05/04/16 Bridge significant dilution effect. the falling hydrograph likely channel) Increases in ER but not due to cooler water GPP on falling temperatures and shorter hydrograph. days. Goulburn River 06/04/16 Base 33.356 McCoy’s Support ecosystem function Any effects of this – (lower river 30/06/16 Bridge watering action were channel) after completion of 2015–16 monitoring. Gwydir 10/04/16 Base 2.600 Pallamallawa Support fundamental No data available. – 30/05/16 ecosystem function processes
Table 2. Summary of 2015–16 watering actions targeting stream metabolism and generic ecosystem functioning in Selected Areas. Selected Area Dates Flow component type Commonwealth environmental water volume delivered (GL) Monitored site(s) Expected ecological outcome Observed ecological outcomes Influences Goulburn River (lower river channel) 01/07/15 – 08/07/15 Fresh 10.661 McCoy’s Bridge Support ecosystem function to commencement of data collection in August 2015. Goulburn River (lower river channel) 09/07/15 – 02/10/15 Base 10.549 McCoy’s Bridge Support ecosystem function Small increases in rates of primary production (GPP) and ecosystem respiration (ER). Increased rates due to increasing water temperatures and longer days coupled with possible enhanced nutrient and organic carbon availability. Goulburn River (lower river channel) 03/10/15 – 29/10/15 99.139 Bridge Support ecosystem function Rates depressed by large dilution effect but increasing on the receding limb of the hydrograph. Eventual rate increased due to increasing water temperatures and longer days coupled with possible enhanced nutrient and organic carbon availability. Goulburn River (lower river channel) 30/10/15 – 12/03/16 Base 0.915 McCoy’s Bridge Support ecosystem function Rates generally increased over this period. Unable to distinguish effects of watering action from seasonal changes. Goulburn River (lower river channel) 15/03/16 – 05/04/16 Base 26.961 McCoy’s Bridge Support ecosystem function Rates depressed by significant dilution effect. Increases in ER but not GPP on falling hydrograph. Lack of response in GPP on the falling hydrograph likely due to cooler water temperatures and shorter days. Goulburn River (lower river channel) 06/04/16 – 30/06/16 Base 33.356 McCoy’s Bridge Support ecosystem function Any effects of this watering action were after completion of 2015–16 monitoring. Gwydir 10/04/16 – 30/05/16 Base 2.600 Pallamallawa Support fundamental ecosystem function processes No data available.
2015-16-basin-evaluation-app-c-stream-metabolism.docx