Chlorophyll fluorescence of the trunk rather than leaves indicates visual vitality in Eucalyptus saligna

Johnstone, Denise; Tausz, Michael; Moore, Gregory; Nicolas, Marc E.

doi:10.1007/s00468-012-0730-7

Cited by 15 publications

(37 citation statements)

References 52 publications

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Section: Introductionmentioning

confidence: 99%

“…At one site, they identified a positive relationship between vitality and tree size. Aiming to assess the vitality of drought stressed and declining mature trees, Johnstone et al [4] adapted the method described by Martin et al [8] for a study in plantation eucalypts and found correlations between visual vitality and total leaf area, above ground biomass, leaf chlorophyll fluorescence (summer), and trunk bark chlorophyll fluorescence (spring, summer, and autumn).…”

Section: Introductionmentioning

confidence: 99%

“…However, most chlorophyll fluorescence and many other physiological measurements of plant stress utilize leaf material, which precludes the year-round assessment of deciduous trees and can confound tree vitality with the health of individual leaves [4]. Using chlorophyll fluorescence measurements in bark tissue to assess vitality, though possible, has seldom been used in practice [4]. The most commonly used chlorophyll fluorescence measurement is F v /F m , where F v is the difference between maximum Forests 2018, 9, 279 2 of 7 (F m ) and minimum (F 0 ) fluorescence [5].…”

Section: Introductionmentioning

confidence: 99%

“…F v /F m values can decrease significantly with salt, heat, and herbicide damage [3], as well as with drought stress [6]. Leaf F v /F m values between 0.78 to 0.85 are typical for healthy, non-stressed trees [3]; however, bark values are typically lower, probably due to a decreased efficiency in bark chlorenchyms and an external bark layer that may inhibit the fluorescence signal passing to the measurement instrument [4].…”

Section: Introductionmentioning

confidence: 99%

“…Visual methods for the assessment of tree vitality have been successfully applied in natural forest stands [7,8], hardwood plantations [4], and urban environments [9,10]. A numerical crown assessment technique was developed for living Eucalyptus (Corymbia) maculata (Hook.)…”

Section: Introductionmentioning

confidence: 99%

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Tree Vitality Assessment in Urban Landscapes

Callow¹,

May

Johnstone

2018

Forests

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Abstract:The recent prolonged drought in Melbourne, Australia has had a deleterious effect on the urban forest, resulting in the premature decline of many mature trees and a consequent decline in the environmental services that trees are able to provide to urban residents. Measuring the severity of tree stress and defoliation due to various climatic factors is essential to the ongoing delivery of environmental services such as shade and carbon sequestration. This study evaluates two methods to assess the vitality of drought stressed Elm trees within an inner-city environment-bark chlorophyll fluorescence measured on large branches and an urban visual vitality index. Study species were Ulmus procera Salisb. (English Elm) and Ulmus × hollandica (Dutch Elm), which are important character and shade tree species for Melbourne. Relationships were identified between leaf water potential and the urban visual vitality index and between leaf water potential and bark chlorophyll fluorescence measured on large branches, indicating that these methods could be used to assess the effect of long-term drought and other stressors on urban trees.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tree Vitality Assessment in Urban Landscapes

Callow¹,

May

Johnstone

2018

Forests

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Visual assessments of establishment success in urban Prunus avium (L.) and Quercus rubra (L.) in relation to water status and crown morphological characteristics

Levinsson

Bosch

Öxell

et al. 2015

Urban Forestry & Urban Greening

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The overlooked carbon loss due to decayed wood in urban trees

Orozco-Aguilar

Johnstone

Livesley

et al. 2018

Urban Forestry & Urban Greening

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Decayed wood is a common issue in urban trees that deteriorates tree vitality over time, yet its effect on biomass yield therefore stored carbon has been overlooked.  The distribution pattern and extent of decay documented in this study was species-dependant and can be aggravated by arboticultural practices. Decay was found to be distributed in three different ways in the three different species evaluated. Central column, cone-shaped and pockets of decay of variable size for U. procera, P. acerifolia and C. maculata, respectively.  Decay was more frequent and extensive in U. procera, than P. acerifolia and least in C. maculate. Decayed wood is not correlated with tree vitality in U. procera and may occur even in visually healthy standing trees within the genera.  The absence of wood as a result of decay significantly reduces the standing volume of all three species examined. The standing volume of U. procera trees with DBH ≥ 40 cm needs to be discounted by a factor of 13% due to internal decayed wood regardless of the species vitality index.  Calculations of stored carbon by urban trees may need to be discounted by a species-decay factor rather than a standard factor that account only for differences in biomass yield between natural and urban trees. The detrimental effect of decayed wood on the standing volume cannot longer be overlooked and need to be considered to better assess urban tree benefits.

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Chlorophyll fluorescence of the trunk rather than leaves indicates visual vitality in Eucalyptus saligna

Cited by 15 publications

References 52 publications

Tree Vitality Assessment in Urban Landscapes

Tree Vitality Assessment in Urban Landscapes

Visual assessments of establishment success in urban Prunus avium (L.) and Quercus rubra (L.) in relation to water status and crown morphological characteristics

The overlooked carbon loss due to decayed wood in urban trees

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