During the months of September and October 2011, HLM took on the task of constructing specially designed compounds to protect groups of threatened orchids transplanted from the disturbance area of a Hunter Valley Mine to suitable environmental offset areas. The two species of Orchid transplanted were Diuris tricolor or Painted Diuris (Vulnerable TSC and Vulnerable EPBC – pictured below), and Prasophyllum sp. aff. petilum (nominated endangered EPBC Act and TSC Act), which is found in situ with the Diuris tricolor.
Diuris tricolor
A total of three compounds broken up into 1m2 grids were planted out with 1200+ orchids. Both species were represented with individual plants collected from as wide a population base as possible across the designated area. Plants were taken within a cut section of native soil to ensure minimal disturbance, transported in covered trailers and replanted on the day they were removed. Cooperative damp weather with regular light to medium showers provided excellent conditions for the project providing damp soil and limiting the risk of heat stress on the orchids. The end result is an easily identified protection area with individually identified orchids mapped per their grid location which will allow for ongoing monitoring and assessment. The gated compounds will prevent unwanted trampling or grazing by cattle as well as accidental disturbance by vehicles.
