6. Noosa River DMP Ver0 (Combined)

No seagrass was recorded. Suitable substrate (soft sediment) for seagrass was present for a
distance of approximately 20-25 m from the shore. Further into the channel, the sediment was
replaced by areas of rock which supported oysters and other sessile invertebrates (Figure 4.1).




                                      Figure 4.1 Rock habitat in extraction area

The replenishment areas at Munna Park and Gympie Terrace foreshore were waded at low tide
to determine if any seagrass was present. No seagrass was recorded.

At all locations, there was evidence of bioturbation (Figure 4.2). This was especially dense at
Hilton Esplanade where it was apparent to a depth of approximately 2.5 m. Faunal bioturbation
in aquatic environments includes all transport processes carried out by animals that directly or
indirectly affect sediment matrices. These processes include both particle reworking and burrow
ventilation. Bioturbation is evident as small holes in the sediment.




                                 Figure 4.2 Bioturbation adjacent to Hilton Esplanade



Noosa River                                                                             Page 8
Marine Plant Impact Assessment
Project Number: BC-20067