Ecology and Silviculture of Eucalypt Forests

Florence, R. G.

doi:10.1071/9780643100893

Cited by 180 publications

(277 citation statements)

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“…The potential occurrence of spatial autocorrelation in the estimator of wildling abundance, for different distance classes, was tested using the Moran's I (Fortin and Dale 2005). A lag distance of 5 km was considered and a spatial correlogram was estimated using package 'ncf' (BjØrnstad and Falck 2001).…”

Section: Discussionmentioning

confidence: 99%

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Assessing the extent and the environmental drivers of Eucalyptus globulus wildling establishment in Portugal: results from a countrywide survey

et al. 2015

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Tasmanian blue gum (Eucalyptus globulus) has been increasingly used in forestry outside its native range, and is nowadays one of the most important pulpwood species in the world. E. globulus has great economic importance in many countries, and in Portugal it has recently become the most widespread tree species. However, there is also an increasing concern about the potential ability of eucalypts to naturally establish from seed (wildling establishment), because of negative ecological and economic impacts this could cause. The natural establishment of this fast-growing exotic species may have undesirable consequences, but little is known about its distribution, or which are the factors influencing its occurrence. In order to investigate these issues, we characterized wildling occurrence and abundance along 3111 roadside transects adjacent to eucalypt plantations distributed throughout continental Portugal. Eucalypt wildlings were found in 60 % of the sampled transects and across all natural regions, with densities ranging from 0 to 10,000 plants ha -1 (mean = 277 plants ha -1 ). The potential influence of environmental variables on wildling establishment from plantations was assessed using boosted regression trees. The abundance of wildlings was found to be primarily affected by precipitation and distance from the sea (used as a surrogate of thermal amplitude), although topography, frost occurrence and soil type also played a significant role. Plant density peaked at around 1500 mm of annual precipitation and it decreased with both decreasing and increasing precipitation, reaching the lowest values below 800 mm Electronic supplementary material The online version of this article (

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Section: Discussionmentioning

confidence: 99%

“…A lag distance of 5 km was considered and a spatial correlogram was estimated using package 'ncf' (BjØrnstad and Falck 2001). Significance of the autocorrelation estimated for each distance class was tested using a permutation test (500 permutations), followed by a sequential Bonferroni correction (Fortin and Dale 2005).…”

Section: Discussionmentioning

confidence: 99%

Assessing the extent and the environmental drivers of Eucalyptus globulus wildling establishment in Portugal: results from a countrywide survey

et al. 2015

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“…These native forests belong to the "open-forest" formation dominated by evergreen eucalypts which occur only in relatively narrow coastal zones where rainfall is relatively high and fairly reliable, that is, along the eastern and south-eastern coasts (including Tasmania), and in the far south-west of Western Australia (Specht 1970). Different from the "closed-forest" formation represented by rain forests (usually noneucalypt, moist, broad leaf forests), leafy crowns of the trees in the upper canopy of "open-forests" dominated by eucalypts do not touch or intermingle and the projected foliage cover is between 30 and 70% (Specht 1970;Florence 1996 (Specht 1970). In ecological and forestry literature, the tall-open forest has commonly been referred to as "wet sclerophyll forest", and the open and low-open forest as "dry sclerophyll forest" (Florence 1996).…”

Section: Datamentioning

confidence: 99%

“…Different from the "closed-forest" formation represented by rain forests (usually noneucalypt, moist, broad leaf forests), leafy crowns of the trees in the upper canopy of "open-forests" dominated by eucalypts do not touch or intermingle and the projected foliage cover is between 30 and 70% (Specht 1970;Florence 1996 (Specht 1970). In ecological and forestry literature, the tall-open forest has commonly been referred to as "wet sclerophyll forest", and the open and low-open forest as "dry sclerophyll forest" (Florence 1996). The sample trees in the data represented both wet and dry sclerophyll forests in five states of Australia (Table 1).…”

Section: Datamentioning

confidence: 99%

“…Apart from these two species, all other species belong to the genus of Eucalyptus and most are tall forest trees which can attain height of more than 30 m. Among the Eucalyptus species, E. cypellocarpa, E. dalrympleana, E. diversicolor and E. mannifera belong to the subgenus Symphyomyrtus, all other Eucalyptus species belong to the subgenus Eucalyptus (or Monocalyptus). Differences in the distribution and ecological characteristics of the subgenera are given in detail by Florence (1996).…”

Section: Datamentioning

confidence: 99%

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Additive biomass equations for native eucalypt forest trees of temperate Australia

Turner

Lambert

2004

Trees

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Biomass additivity is a desirable characteristic of a system of equations for predicting component as well as total tree biomass since it eliminates the inconsistency between the sum of predicted values for components such as stem, bark, branch and leaf and the prediction for the total tree. Besides logical consistency, a system of additive biomass equations when estimated by taking into account the inherent correlation among the biomass components has greater statistical efficiency than separately estimated equations for individual components. Using mostly small sample data from both published and unpublished sources, a system of non-linear additive biomass equations was developed for 15 native eucalypt forest tree species of temperate Australia. Diameter at breast height was used as the independent variable for all 15 species, while the combined variable of diameter and tree height was used for 14 species with height data. The system of additive equations provided more accurate biomass estimates than the common approach of separately fitting total tree and component biomass equations using log transformed data through least squares regression. Residual error variances were collectively estimated for each species by pooling small sample data across species and using indicator variables to represent the scale factor for each species in a residual variance function. This method overcame a common problem in estimating heteroscedastic error variance in non-linear biomass equations with additive error terms for small samples. From the estimated residual variance functions, approximate confidence bands containing about 95% of the observed data about the mean curve of predicted biomass were derived for all biomass components of each species. This system of additive biomass equations will prove to be useful for biomass estimation of native eucalypt forests of temperate Australia.

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Logging and fire regimes alter plant communities

Bowd

Lindenmayer

Banks

et al. 2018

Ecological Applications

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Disturbances are key drivers of plant community composition, structure, and function. Plant functional traits, including life forms and reproductive strategies are critical to the resilience and resistance of plant communities in the event of disturbance. Climate change and increasing anthropogenic disturbance are altering natural disturbance regimes globally. When these regimes shift beyond the adaptive resilience of plant functional traits, local populations and ecosystem functions can become compromised. We tested the influence of multiple disturbances, of varying intensity and frequency, on the composition and abundance of vascular plant communities and their respective functional traits (life forms and reproductive strategies) in the wet sclerophyll, Mountain Ash Eucalyptus regnans forests of southeastern Australia. Specifically, we quantified the effect of the type and number of disturbances (including fires, clearcut logging, and salvage logging) on plant community composition. We found that clearcut and salvage logging and the number of fires significantly influenced plant community composition and functional traits. Specifically, multiple fires resulted in lower populations of species that depend on on-site seeding for persistence. This includes the common tree species Eucalyptus regnans, Pomaderris aspera, and Acacia dealbata. In contrast, clearcut and salvage logged sites supported abundant on-site seeder species. However, species that depend on resprouting by surviving individuals, such as common and keystone "tree ferns" Dicksonia antarctica and Cyathea australis, declined significantly. Our data have important implications for understanding the relationship between altered disturbance regimes and plant communities and the respective effects on ecosystem function. In a period of rapid global environmental change, with disturbances predicted to increase and intensify, it is critical to address the impact of altered disturbance regimes on biodiversity.

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Ecology and Silviculture of Eucalypt Forests

Cited by 180 publications

References 0 publications

Assessing the extent and the environmental drivers of Eucalyptus globulus wildling establishment in Portugal: results from a countrywide survey

Assessing the extent and the environmental drivers of Eucalyptus globulus wildling establishment in Portugal: results from a countrywide survey

Additive biomass equations for native eucalypt forest trees of temperate Australia

Logging and fire regimes alter plant communities

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