Fig 1.
Map showing the location of study sites in Tallebudgera Valley and northern New South Wales.
Fig 2.
Composition of Myrtaceae and non-Myrtaceae (n = total number of trees/shrubs) within the different forest layers in a subtropical rainforest/wet sclerophyll ecosystems at Site 1, Ryans Road, Tallebudgera Valley, Queensland.
Table 1.
Myrtaceae species at Ryans Road, Tallebudgera Valley and previous Austropuccinia psidii susceptibility ratings [17].
Fig 3.
Composition of regenerating (n = 99), under-storey (n = 101) and mid-story (n = 93) Myrtaceae in 2016 within a subtropical rainforest/wet sclerophyll forest at Ryans Road, Tallebudgera Valley, Queensland.
Table 2.
Impact of Austropuccinia psidii infection on the main species making up the three vegetation-story components of the wet sclerophyll/rainforest ecosystem at Ryans Road, Tallebudgera Valley, Queensland.
The composition within the forest canopy is presented for each species including Regeneration, Under-story and Mid-story. Impact levels are based on the mean percentage of dead branches, the mean percentage of remaining branches with evidence of dieback as a result of infection by A. psidii. Mean crown transparency is used as an indicator of tree health. The same letters within columns indicate that means do not differ significantly when comparing species (Capital letters = Regeneration; Capital Bold = Under-story; Lower case = Mid-story) (S1 Table). The same numbers within columns indicate that means do not differ significantly when comparing disease impact levels within species at the different canopy positions (S1 Table).
Table 3.
Impact of Austropuccinia psidii based on a single assessment conducted in 2014of Rhodamnia maideniana trees across six sites in NSW and Queensland.
The same letters within columns indicate that means do not differ significantly.
Fig 4.
Tree dieback and increased canopy transparency as a result of repeated infection by Austropuccinia psidii on species of Myrtaceae (a) Decaspermum humile; (b) Syzygium corynanthum; (c) Archirhodomyrtus beckleri; (d) Syzygium hodgkinsoniae; (e) Gossia hillii.
Fig 5.
Symptoms of Austropuccinia psidii infection of epicormic/reshooting young foliage of (a) Rhodamnia maideniana, (b) Syzygium corynanthum, (c) Syzygium hodgkinsoniae, (d) Gossia hillii, (e) Decaspermum humile and (f) Archirhodomyrtus beckleri.
Fig 6.
Progression of decline from 2014 (top) to 2016 (bottom) on Acmena smithii, Decaspermum humile and Syzygium corynanthum caused by repeated Austropuccinia psidii infection.
Fig 7.
Decline in tree health over time as a result of repeated Austropuccinia psidii infection on Rhodamnia rubescens (a 2014; b 2016), Rhodamnia maideniana (c 2014, d 2016) and Rhodomyrtus psidioides (e 2014, f 2016).