Understanding the effect of fire on vegetation composition and gross primary production in a semi-arid shrubland ecosystem using the Ecosystem Demography (EDv2.2) model

Pandit, Karun; Dashti, Hamid; Hudak, Andrew T.; Glenn, Nancy F.; Flores, Alejandro N.; Shinneman, Douglas J.

doi:10.5194/bg-18-2027-2021

Cited by 3 publications

References 60 publications

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Fire Severity as a Determinant of the Socioeconomic Impact of Wildfires

Marcos,

Fernández-Guisuraga,

Fernández-García

et al. 2024

Fire Hazards: Socio-Economic and Regional Issues

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Fire has played a crucial role in shaping Earth's landscapes for millions of years and has been used as a cultural tool for human development for millennia. However, changing fire regimes driven by global change drivers and human influences are reshaping landscapes and leading to more severe wildfires, with significant socioeconomic and environmental consequences. These wildfires have substantial direct impacts on human lives, properties, and mental health, as well as indirect impacts on ecosystem services, negatively affecting provisioning, regulating, and cultural services. In general, severe wildfires disrupt the functioning of ecosystems and the subsequent recovery of the ecosystems services. Remote sensing techniques represent efficient tools for monitoring post-fire ecosystem service recovery. On the other hand, the impact of large fires is perceived differently by society influenced by socioeconomic factors, previous experiences, and community dynamics. Understanding these perceptions is essential for developing effective wildfire management and mitigation strategies at the local level. To address the challenges posed by changing fire regimes, a Fire Smart Territory (FST) approach could be considered, emphasizing integrated fire management that considers prevention, effective response, and post-fire restoration. This approach presented in this book chapter also promotes the involvement of local communities in fire prevention and management. So, the conservation of ecosystem services in fire-prone areas requires a holistic and adaptive approach that incorporates ecological knowledge, societal needs, and sustainable land management practices. By adopting an FST framework and considering the complex interactions between fire, ecosystems, and human communities, it is possible to mitigate the impacts of wildfires and promote resilience in these vulnerable landscapes.

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Fire Severity as a Determinant of the Socioeconomic Impact of Wildfires

Marcos,

Fernández-Guisuraga,

Fernández-García

et al. 2024

Fire Hazards: Socio-Economic and Regional Issues

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Effect of Bushfire on the Structure and Composition of a Tropical Forest Reserve in Ghana

Likpalimor

2024

Preprint

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The increasing frequency of bushfires rapidly alters forest ecosystems by transforming their vegetation structure and composition. This phenomenon poses a significant threat to biodiversity, as it hinders the forest's ability to regenerate and enhances its variability. Despite the urgent need to understand these impacts, comprehensive studies documenting the effects of bushfires on vegetation, particularly in the Opro River Forest Reserve, remain scarce. This study aims to assess the influence of bushfires on the vegetation structure and composition within the Opro River Forest Reserve. The research was conducted at two distinct sites: burnt and unburnt sites of the forest reserve. Sampling involved the establishment of twenty 25 m × 25 m plots, with ten plots designated for each site. Trees with a diameter at breast height (dbh) of 10 cm or greater were recorded, alongside nested plots of 5 m × 5 m for shrubs (dbh < 10 cm and height > 1.5 m). A total of 75 plant species across 31 families were identified in both sites. In the unburnt forest site, trees were the dominant woody plants, with Broussonetia papyrifera being the most prevalent species. Conversely, the burnt site of the forest was primarily dominated by shrubs, particularly Chromolaena odorata. The Shannon diversity index was higher in the unburnt site (0.36) compared to the burnt site (0.34), although species evenness and the total number of individuals were greater in the burnt area. Notably, tree diversity significantly declined in the burnt site relative to the unburnt site.

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Spectral indicators of the post-pyrogenic state of steppe areas (using the example of a key territory in the Southern Trans-Urals)

Pavleichik,

Ryahov

2024

ICIGIS

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Pyrogenic effects are one of the most significant environmental and landscape-forming factors in the steppe regions of Northern Eurasia, and therefore the issues of assessing the nature and duration of restoration processes remain more than relevant. The objectives of the study were to identify regional features of the use of spectral indices in assessing the dynamics of postpyrogenic recovery processes. The key territory is located in the Southern Trans-Urals within the Orenburg Region and covers an area of 657 km2. In August 2017, part of it was exposed to fire. The initial materials were multispectral images of Landsat-8, the collection of zonal statistics was carried out on 26 sites with an area of 1 km2 each, linearly grouped into 6 conditional profiles. Taking into account the idea of the duration of post-pyrogenic recovery processes, the time series of images covers the growing season from 2016 to 2019. Widely used spectral indices were used for the analysis: NDVI, BAI, MIRBI, NBR, NBR2, NBRT1, NBRT3, SWVI and surface temperature. Based on the generated database, the values were calculated for individual profiles and for all sites in general, divided into burnt and unburnt territories. The actual (average, maximum and minimum) values and deviations from the benchmarks were calculated, tables of correlation dependencies between the values of spectral indices were prepared. All the considered spectral indices with varying degrees of contrast recorded the features of the burnt surface until the end of the growing season in 2017. MIRBI, NBR2 and surface temperature indicators showed the longest duration of preservation of differences between burning and natural vegetation without significant loss of contour boundaries (until the end of 2019). Some spectral indices (NDVI, NBR, NBRT1, BAI and, especially, SWVI) retained the outlines of the burning contour for a long time, but radically changed the nature of the relationship with the background at various times of the recovery period. This was facilitated by the active growth of green phytomass on the burns and the masking effect of dry phytomass on the control sites. The duration of the preservation of differences between burns and control areas according to remote sensing data is about two years (growing season). Approximately at the same time, the resumption of the ability to spread fire sustainably is estimated.

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Understanding the effect of fire on vegetation composition and gross primary production in a semi-arid shrubland ecosystem using the Ecosystem Demography (EDv2.2) model

Cited by 3 publications

References 60 publications

Fire Severity as a Determinant of the Socioeconomic Impact of Wildfires

Fire Severity as a Determinant of the Socioeconomic Impact of Wildfires

Effect of Bushfire on the Structure and Composition of a Tropical Forest Reserve in Ghana

Spectral indicators of the post-pyrogenic state of steppe areas (using the example of a key territory in the Southern Trans-Urals)

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