Relative importance of site, weather and Phytophthora cinnamomi in the decline and death of Eucalyptus marginata – jarrah dieback investigations in the 1970s to 1990s

Abstract

Relative importance of site, weather and Phytophthora cinnamomi in the decline and death of Eucalyptus marginatajarrah dieback investigations in the 1970s to 1990s.

The Impacts of Drought Stress and Phytophthora cinnamomi Infection on Short-Term Water Relations in Two Year-Old Eucalyptus obliqua

“…However, our results are similar to Turco et al [36], who observed no symptoms in Quercus ilex and Q. cerris that were inoculated by P. cinnamomi in a full irrigation treatment, although root necrosis was eventually observed after 11 weeks. The occurrence of secondary symptoms following the P. cinnamomi infection might be latent depending on the pathogen aggressiveness, host susceptibility and environmental condition [22,61]. A time lag of 6 to 18 months can occur during Phytophthora infection until drought-like symptoms are observed in field studies [22,35,61].…”

“…The occurrence of secondary symptoms following the P. cinnamomi infection might be latent depending on the pathogen aggressiveness, host susceptibility and environmental condition [22,61]. A time lag of 6 to 18 months can occur during Phytophthora infection until drought-like symptoms are observed in field studies [22,35,61].…”

“…Third, it is also possible that our experimental period was too short, as P. cinnamomi could take a longer time to affect the trees [22,35,61]. The effects of Phytophthora infection can develop slowly, depending on the aggressiveness of the pathogen, the plant condition and the growth condition.…”

“…They have been associated with tree decline in many ecosystems, including native forests and urban environments in a large variety of tree species across the world [13][14][15][16][17][18][19][20]. In Australia, Phytophthora has been strongly linked to many cases of tree dieback in both native and urban ecosystems [21,22], in Victoria [23], Northern Queensland [24] and Western Australia [25,26]. Phytophthora has a wide range of host plants, including many Australian native plant species [27], e.g., members of the genus Eucalyptus [20,21].…”

Recruitment failure of keystone trees in Phytophthora infested forest

“…While marri has not been targeted for intensive logging, the species has been affected by the logging of neighbouring jarrah trees and subsequent effects on hydrology. Despite their co-occurrence with jarrah, there are no records of mass marri deaths alongside jarrah, and many marri typically continued to survive where mass jarrah deaths occurred, with few deaths observed along infestation fronts (Davison, 2015(Davison, , 2018Shearer & Tippett, 1989).…”