Horses Complicate Burning Trials

Trial burn, Bopeechee Spring, May 2016

In our last newsletter we reported on a burning trial conducted on three springs on the Finniss Springs property, Bopeechee, Beatrice and a spring described as HBO 004, in May 2016. This trial was undertaken as part of DEWNR’s Desert Jewels project as an initial effort to assess the potential ongoing role of fire in the management of reeds, particularly Phragmites, in mound springs. Prolific growth of Phragmites has occurred at many springs that have been protected from cattle grazing to the apparent detriment of other wetland species. DEWNR and FOMS have been considering options for the active management of this prolific reed growth, with fire and periodic grazing (see also the Billa Kalina article) being two options for consideration.

In July 2016 a FOMS group visited Finniss Springs and noted quite strong regrowth of Phragmites just 7 or 8 weeks after the trial burn. At the time, FOMS carried out some vegetation monitoring, measuring density and height of regrowth.

However, in June 2017 a further FOMS inspection showed that the regrowth of Phragmites is being severely grazed by horses. The photos included here of Spring HBO 004 illustrate the situation. This has significantly complicated the monitoring program. While the horses remain in the area we are not simply monitoring the response of Phragmites to a trial burn but monitoring a combination of regrowth from fire and grazing impacts. Some discussion will be needed about the value of continuing the current vegetation monitoring or the need to adopt a different approach.

Same spring in June 2017. Phragmites now gone from spring vent as a result of grazing by horses
Spring HBO004 in June 2016, about 7 weeks after trial burn. Significant regrowth of Phragmites
Burning Trial Site