Soil microbial activity in response to fire severity in Zagros oak (Quercus brantii Lindl.) forests, Iran, after one year

Pourreza, Morteza; Hosseini, Seyed Mohsen; Sinegani, Ali Akbar Safari; Matinizadeh, Mohammad; Dick, Warren A.

doi:10.1016/j.geoderma.2013.07.024

Cited by 65 publications

(41 citation statements)

References 44 publications

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“…In forest ecosystems, fire alters the soil microbial community composition and activity in the form of direct heat-induced microbial mortality [1,2]. Furthermore, loss of forest by fire and grass invasion may alter nutrient cycling and quality of organic matter [3], which can indirectly affect the soil microbial community.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Re-Planting Trees on Soil Microbial Communities in a Wildfire-Induced Subalpine Grassland

Chang

Tian

Chiu

2017

Forests

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Abstract:Wildfire often causes tremendous changes in ecosystems, particularly in subalpine and alpine areas, which are vulnerable due to severe climate conditions such as cold temperature and strong wind. This study aimed to clarify the effect of tree re-planting on ecosystem services such as the soil microbial community after several decades. We compared the re-planted forest and grassland with the mature forest as a reference in terms of soil microbial biomass C and N (C mic and N mic ), enzyme activities, phospholipid fatty acids (PLFA) composition, and denaturing gradient gel electrophoresis (DGGE). The C mic and N mic did not differ among the grassland, re-planted forest and mature forest soil; however, ratios of C mic /C org and N mic /N tot decreased from the grassland to re-planted forest and mature forest soil. The total PLFAs and those attributed to bacteria and Gram-positive and Gram-negative bacteria did not differ between the re-planted forest and grassland soil. Principle component analysis of the PLFA content separated the grassland from re-planted forest and mature forest soil. Similarly, DGGE analysis revealed changes in both bacterial and fungal community structures with changes in vegetation. Our results suggest that the microbial community structure changes with the re-planting of trees after a fire event in this subalpine area. Recovery of the soil microbial community to the original state in a fire-damaged site in a subalpine area may require decades, even under a re-planted forest.

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Section: Introductionmentioning

confidence: 99%

The Effect of Re-Planting Trees on Soil Microbial Communities in a Wildfire-Induced Subalpine Grassland

Chang

Tian

Chiu

2017

Forests

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“…In monitored plots in 12 plantations, 66% of trees were symptomatic and some affected trees died. By contrast, in south western Iran in the Zagros Mountains, Q. brantii is the main tree species, which is also a widely distributed oak species in other Middle East countries (Pourreza, Hosseini, Sinegani, Matinizadeh, & Dick, ). In monitored plots, 52% of this tree species were symptomatic and some had died; since it has such a wide distribution throughout the region, it could be at risk if this disease continues to spread.…”

Section: Discussionmentioning

confidence: 99%

Brenneria spp. and Rahnella victoriana associated with acute oak decline symptoms on oak and hornbeam in Iran

et al. 2019

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Decline diseases of forest trees are complex syndromes not attributable to single causal factors. In Iran, symptoms of decline disease have been observed in a number of native forest species including Quercus castaneifolia (chestnut‐leaved oak), Q. brantii (Persian oak) and Carpinus betulus (hornbeam). The symptoms are prevalent in the northern forests and the Zagros mountain forests. There are parallels between the disease in Iran and acute oak decline (AOD) reported in the UK, specifically the presence of weeping cankers, which have been attributed to a polybacterial complex wherein Brenneria goodwinii is considered a key necrogen. Based on the AOD symptomatology, and as a first step towards discovering potential causal agents of the stem weeping symptoms of affected trees in Iran, necrotic tissues were tested primarily for the presence of B. goodwinii. Symptomatic Q. castaneifolia and C. betulus from the Mazandaran Province and symptomatic Q. brantii from Kohgiluyeh and Boyerahmad Province were sampled. Isolation and culture on a selective medium yielded uniform bacterial colonies. Isolates were characterized using phenotypic and genotypic (DNA sequencing) tests. The isolates were phenotypically identical to members of Pectobacteriaceae and Yersiniaceae, specifically Brenneria and Rahnella spp. The nucleotide sequences of the 16S rRNA and housekeeping genes gyrB, infB and atpD (MLSA) amplified via PCR demonstrated that the isolates from the trees in Iran were indeed B. goodwinii, B. roseae subsp. roseae, Rahnella victoriana and an unknown species of Brenneria. Most bacteria isolated from non‐symptomatic trees were Gram‐positive, and Pseudomonas spp. were dominant, but bacterial species isolated from the diseased trees were not detected in healthy trees. Hypersensitivity response tests were positive, but inoculation on saplings was more variable with internal necrosis developing only once in the test period. Therefore, further testing is required. This is the first report of the incidence of B. goodwinii, B. roseae subsp. roseae, R. victoriana and Brenneria sp. associated with acute oak decline‐like symptoms on Q. castaneifolia, Q. brantii and C. betulus across the western forests of Iran and in the world.

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“…The dominant canopy species in these forests is Persian oak (Quercus brantii Lindl. ), also known as Brant's oak, which is widely distributed across western Asia and the Middle East (Turkey, Iraq, Syria and Lebanon) (Pourreza et al 2014). Persian oak covers more than 90 % of the study area with individuals originating either from seed or from coppicing.…”

Section: Study Areamentioning

confidence: 99%

“…In recent decades, grazing has been controlled by excluding livestock from most afforested areas. The coppice form of these forests alters the primary regeneration pathway, thereby reducing the opportunities for regeneration establishment by seed (Pourreza et al 2014). Due to a change in national policy that was adopted in 1963, private ownership shifted to public ownership and state forest management.…”

Section: Study Areamentioning

confidence: 99%

Influence of soil properties and burial depth on Persian oak (Quercus brantii Lindl.) establishment in different microhabitats resulting from traditional forest practices

et al. 2017

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Soil microbial activity in response to fire severity in Zagros oak (Quercus brantii Lindl.) forests, Iran, after one year

Cited by 65 publications

References 44 publications

The Effect of Re-Planting Trees on Soil Microbial Communities in a Wildfire-Induced Subalpine Grassland

The Effect of Re-Planting Trees on Soil Microbial Communities in a Wildfire-Induced Subalpine Grassland

Brenneria spp. and Rahnella victoriana associated with acute oak decline symptoms on oak and hornbeam in Iran

Influence of soil properties and burial depth on Persian oak (Quercus brantii Lindl.) establishment in different microhabitats resulting from traditional forest practices

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