Introduction

Bom, Myra Miranda

doi:10.1007/978-3-031-10429-9_1

Cited by 2 publications

(3 citation statements)

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“…SGCP has a Mediterranean-type climate with a mean yearly precipitation of 540 mm, concentrated in winter and little rainfall over warmer summer months. It has a mean annual temperature of 21 • C with a mean summer (December-February) temperature of 28 • C based on input for Clare High School [80]. SGCP has an area of 4.11 km 2 with hilly terrain and steep-sided valleys [81] vegetated with an open woodland forest [17], which is dominated by the red stringybark.…”

Section: Study Areamentioning

confidence: 99%

Quantifying Dieback in a Vulnerable Population of Eucalyptus macrorhyncha Using Remote Sensing

Fitzgerald

Peters

Guerin

et al. 2023

Land

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A disjunct population of red stringybark (Eucalyptus macrorhyncha) trees in South Australia is experiencing increasing amounts of dieback. Because the population is considered vulnerable to extinction, we investigated spatiotemporal vegetation changes, quantified the extent of dieback, and determined how topography influences dieback using aerial and satellite imagery. Classification of vegetation health status using hyperspectral aerial imagery indicated that 37% (accuracy = 0.87 Kappa) of the population was unhealthy and potentially experiencing dieback. When correlating this classification with a digital terrain model (DTM), the aspect and amount of solar radiation had the strongest relationship with the presence of unhealthy vegetation. PlanetScope satellite-derived, and spectral index-based analysis indicated that 7% of the red stringybark population experienced negative vegetation health changes during a five-year period (2017–2022), with positive vegetation health changes (9.5%) noted on pole-facing slopes. Therefore, our integrated remote sensing approach documented the extent and spatiotemporal dynamics of dieback, suggesting it could be applied in other studies. Topographical aspects exposed to high-solar radiation were particularly vulnerable to dieback, and pole-facing aspects demonstrated some recovery between droughts. The influence of topography and maps of vegetation health can be used to guide future management and restoration of the population.

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Section: Study Areamentioning

confidence: 99%

Quantifying Dieback in a Vulnerable Population of Eucalyptus macrorhyncha Using Remote Sensing

Fitzgerald

Peters

Guerin

et al. 2023

Land

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“…We monitored microclimate and FMC at eight instrumented field sites located in the Central Highlands of Victoria in SE Australia (Ecological Vegetation Class (EVC) 30) in the Highlands-Southern Fall Bioregion (Cheal, 2010), although due to the experimental design, not all field sites meet the benchmark criteria for this vegetation classification. The region experiences a temperate climate, with a mean daily minimum and maximum temperature range of 13.4-28.1°C in summer (January) and 3.9-12.1°C in winter (July), respectively (1994-2022BoM, 2022). Rainfall in the region increases orographically, with an average of 122 days of rain per year and 1462 mm mean annual rainfall between 1942(BoM, 2022.…”

Section: Study Areamentioning

confidence: 99%

“…The region experiences a temperate climate, with a mean daily minimum and maximum temperature range of 13.4-28.1°C in summer (January) and 3.9-12.1°C in winter (July), respectively (1994-2022BoM, 2022). Rainfall in the region increases orographically, with an average of 122 days of rain per year and 1462 mm mean annual rainfall between 1942(BoM, 2022. The soils in this region are deep granitic krasnozemic (friable red/brown loams) with a high organic matter content and water holding capacity (Ashton, 1976a;Ashton & Attiwill, 1994).…”

Section: Study Areamentioning

confidence: 99%

Forest reorganisation effects on fuel moisture content can exceed changes due to climate warming in wet temperate forests

Brown,

Duff,

Inbar

et al. 2023

Global Change Biology

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The distributions of vegetation and fire activity are changing rapidly in response to climate warming. In many regions, climate effects on dead fuel moisture content (FMC) are expected to increase future wildfire activity. However, forest FMC is largely driven by microclimate conditions, which are moderated from open weather by vegetation canopies. As shifts in vegetation increase under climate warming, the extent to which future fire activity will be driven by climate directly or associated vegetation shifts remains unresolved. Here, we present a study aimed at quantifying the relative magnitudes of (i) direct climate warming, and (ii) vegetation change, on FMC. Field sites to evaluate these effects were established in a natural laboratory of altered forest states to mature wet temperate forest in south‐eastern Australia. FMC was estimated using a process‐based model and 48 years of reconstructed climate data. Canopy effects on microclimate were captured by transferring inputs from climate to microclimate using models parameterised with field observations. To evaluate the relative magnitude of climate and vegetation effects, we calculated the maximum difference in mean annual FMC across annual climate replicates and compared this to FMC differences across reorganising forest sites. Our results show vegetation effects on FMC can exceed those related to expected climate change. Changes to forest structure and composition increased (+15.7%) and decreased (−12.3%) mean annual FMC, with a larger negative effect when forest cover was completely removed (−18.5%). In contrast, the largest climate effect on FMC was −6.6% across 48‐years of data. Our study demonstrates that the magnitude of vegetation effects on FMC can exceed expected climate change effects. Models of future fire activity that do not account for changing vegetation effects on microclimate are omitting a key biophysical control on FMC and therefore may not be accurately predicting future fire activity.

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Introduction

Cited by 2 publications

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Quantifying Dieback in a Vulnerable Population of Eucalyptus macrorhyncha Using Remote Sensing

Quantifying Dieback in a Vulnerable Population of Eucalyptus macrorhyncha Using Remote Sensing

Forest reorganisation effects on fuel moisture content can exceed changes due to climate warming in wet temperate forests

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