Phytophthora Sp. Associated With Mangrove Death in Central Coastal Queensland.

Pegg, K. G.; Gillespie, N. C.; Forsberg, L. I.

doi:10.1071/app98030006

“…An exception is the Gambia case which will be discussed later. Fungal infestation has been asso- ciated with extensive killings in Australia, but the disease outbreak was recognized as a symptom of environmental changes (Pegg et al 1980). Rapid environmental change in mangrove environments appears to be the common denominator to the reported cases of natural massive tree mortalities.…”

Section: Massive Mortalitymentioning

confidence: 99%

Tree Mortality in Mangrove Forests

Jiménez¹,

Lugo²,

Cintrón³

1985

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Twenty-eight worldwide reports of massive mangrove tree mortalities are reviewed. Massive mortality is defined as tree mortalities that occur in response to rapid environmental change and affect all size dasses. Massive mortality occurs in addition to normal tree mortality. Normal tree mortality was described using structural data from 114 mangrove stands. This mortality is density dependent, follows orderly time dependent patterns dictated by stand maturation (related to average tree diameter), and usually occurs in the smaller diameter size classes. Disease and other biotic factors do not appear to be primary causes of massive mangrove mortalities. Instead, these factors appear to attack forests weakened by changes in the physical environment. Mangrove environments are dynamic and cyclical and mangrove associations adapt to such environments by both growing and dying fast. Mangrove species' characteristics such as the capacity to produce large quantities of propagules that take advantage of dispersal agents, sharp species zonations, and even-aged populations contribute to the rapid growth-mortality cycles in mangroves. Humans may tilt the balance towards higher mortality rates by introducing chronic stressors that inhibit regeneration mechanisms.

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“…Even though there are twelve different species of mangroves in the affected area, only A. marina were affected (Pegg et al, 1980).…”

Section: Diseases Of Mangrove Treesmentioning

confidence: 99%

“…Extensive mortality of A. marina (White/grey mangrove) along the Gladstone coast of Queensland, Australia, has been attributed to Phytophthora (Oomycetes) species (Pegg et al, 1980). The causal agent of the mortality is currently classified in the genus Halophytophthora (Ho and Jong, 1990) and resembles Phytophthora vesicula…”

Section: Diseases Of Mangrove Treesmentioning

confidence: 99%

“…The variability of mangrove ecosystems has attracted the attention of several researchers who have contributed extensively to scientific knowledge about fungi associated with mangrove trees (Alias et al, 2010;Cribb and Cribb 1953 (Barnard and Freeman 1982;Pegg et al, 1980;Stevens 1920;Tattar and Scott 2004;Teas et al, 1982;Wier et al, 2000).…”

Section: Fungi Associated With Mangrovesmentioning

confidence: 99%

See 1 more Smart Citation

A review of factors associated with decline and death of mangroves, with particular reference to fungal pathogens

Osorio

¹

,

Wingfield

²

,

Roux

³

2016

South African Journal of Botany

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“…Normal mortality, expressed as a reduction in tree density, occurs as a negative power function of the mean Pegg et al 1980 tree diameter at breast height (dbh) of the stand (Fig. 1).…”

Section: Normal Mortalitymentioning

confidence: 99%

Tree mortality in mangrove forests

1986

Deep Sea Research Part B. Oceanographic Literature Review

0

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Twenty-eight worldwide reports of massive mangrove tree mortalities are reviewed. Massive mortality is defined as tree mortalities that occur in response to rapid environmental change and affect all size dasses. Massive mortality occurs in addition to normal tree mortality. Normal tree mortality was described using structural data from 114 mangrove stands. This mortality is density dependent, follows orderly time dependent patterns dictated by stand maturation (related to average tree diameter), and usually occurs in the smaller diameter size classes. Disease and other biotic factors do not appear to be primary causes of massive mangrove mortalities. Instead, these factors appear to attack forests weakened by changes in the physical environment. Mangrove environments are dynamic and cyclical and mangrove associations adapt to such environments by both growing and dying fast. Mangrove species' characteristics such as the capacity to produce large quantities of propagules that take advantage of dispersal agents, sharp species zonations, and even-aged populations contribute to the rapid growth-mortality cycles in mangroves. Humans may tilt the balance towards higher mortality rates by introducing chronic stressors that inhibit regeneration mechanisms.

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Phytophthora Sp. Associated With Mangrove Death in Central Coastal Queensland.

Cited by 19 publications

References 4 publications

Tree Mortality in Mangrove Forests

Tree Mortality in Mangrove Forests

A review of factors associated with decline and death of mangroves, with particular reference to fungal pathogens

Tree mortality in mangrove forests

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