In addition to the jumping ants, leeches, snakes, mud and mosquitoes we saw a wide range in climatic conditions, from strong winds with temperatures in the high 20’s, to a heat wave in the high 30’s followed by cool drizzle in the low 20’s, all making sampling around the lake challenging.

  Extensive lily coverage of the site.

Extensive lily coverage of the site.

 

The study implemented a variety of sampling techniques aimed to account for the three main methane pathways to the atmosphere. Methane diffusion rates and plant mediated flux rates were measured during multiple transects, using a floating chamber coupled with a Los Gatos gas analyser. Ebullition rates and concentrations were measured using replicate methane cones and run through a Piccaro methane isotope analyser (cavity ring-down spectroscopy). In addition spatial and temporal representations of water column methane concentrations were measured during a 96h time series using a second Piccaro (CRDS) measuring methane, carbon dioxide and their isotopes, along with multiple spatial transect grab samples, from different regions of the lake and vegetation types.

   Dr Damien Maher overlooking the chamber incubation flux rates within the Melaleuca forest

 Dr Damien Maher overlooking the chamber incubation flux rates within the Melaleuca forest

 

In an effort to quantify lily coverage we sought the assistance of some drone mapping from Brendan Kelaher at the National Marine Science Centre, to accurately quantify the % of vegetative coverage within the lake. Future research sites were also scouted and prepared for seasonal vegetative methane flux measurements, from a within a variety of habitats and intermittently wet- dry floodplain areas.

  Ebullition cone deployment ready for their maiden voyage

Ebullition cone deployment ready for their maiden voyage

 

The results from this preliminary research will be processed over the next 6 months aiming for publication in late 2017.”

 

 

   Late arvo sampling of the sediment-air methane flux using LGR gas analyser

 Late arvo sampling of the sediment-air methane flux using LGR gas analyser

  Assessing chamber incubation data in situ, showing the flux rates of methane and CO2 from the vegetated lily areas of the lake

Assessing chamber incubation data in situ, showing the flux rates of methane and CO2 from the vegetated lily areas of the lake

   Assessing the native wildlife

 Assessing the native wildlife

  Sampling night-time chamber incubations vs day-time to account for diurnal variations

Sampling night-time chamber incubations vs day-time to account for diurnal variations

  Dr Douglas Tait deploying ebullition traps

Dr Douglas Tait deploying ebullition traps

  One wet Luke Jeffrey and his study site after 24h working in the continuous drizzle

One wet Luke Jeffrey and his study site after 24h working in the continuous drizzle

   Melaluca forest fringing the western side of the wetland

 Melaluca forest fringing the western side of the wetland

   Drawing out methane bubbles from a 24h period to calculate volume and concentrations for ebullition

 Drawing out methane bubbles from a 24h period to calculate volume and concentrations for ebullition

  Dr Brendan Kelaher deploying the NMSC drone for aerial mapping of the vegetation coverage

Dr Brendan Kelaher deploying the NMSC drone for aerial mapping of the vegetation coverage

   Dr Damien Maher giving a pep talk to the local Green Army volunteers about the role of wetlands and carbon cycling

 Dr Damien Maher giving a pep talk to the local Green Army volunteers about the role of wetlands and carbon cycling

    Novel techniques (wack a tube straight over the plant aerenchyma!) to measure the plant mediated methane flux

  Novel techniques (wack a tube straight over the plant aerenchyma!) to measure the plant mediated methane flux

   Native frog

 Native frog

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  Future study sites resembling picnic areas, ready to quantify seasonal vegetative methane emissions

Future study sites resembling picnic areas, ready to quantify seasonal vegetative methane emissions

   Dr Douglas Tait GPS mapping the future wetland research sites to be revisited in 2017       

Dr Douglas Tait GPS mapping the future wetland research sites to be revisited in 2017