Regeneración post-fuego en relación con la severidad del incendio en un área atlántica de Galicia. Bases para la restauración

The identification of the factors controlling the understory species distribution and abundance is essential to understand the ecology and dynamics of natural forests and their management response. We assess the relationships between environmental gradients and shrub functional groups distribution patterns and niche characteristics in a transitional area between the Eurosiberian and Mediterranean biogeographic regions in Northern Spain. Here, 772 plots from the 3rd Spanish National Forest Inventory were used. Shrub functional groups respond to the same complex environmental gradients as trees, i.e., the north-south climatic gradient and a slope gradient. Unimodal response curves of shrub functional groups and families dominate along both gradients, providing evidence of successful functional turnover. Similar to tree species, the niche location of functionally related shrubs is close. Functional groups occupying environments with sharp contrast or transitional environments have the broadest niches, whereas those specialized functional groups occupying localized habitats showed the narrowest niches. The knowledge of shrub species distributions and niche characteristics along complex environmental gradients will improve our ability to discuss potential conservation management goals or threats due to land-use changes and future climate change.

show abstract

“…(c) Dispersal mode according to LEDA traitbase [60] and D-3 database [61]. (d) Regeneration method according to [62][63][64][65].…”

Section: Discussionmentioning

confidence: 99%

Niche Characterization of Shrub Functional Groups along an Atlantic-Mediterranean Gradient

Olthoff

Martínez-Ruiz

Alday

2021

Forests

View full text Add to dashboard Cite

show abstract

“…The transformation of the square root causes very low values of the prefire NBR, leading to low or negative differences; therefore, these authors proposed a new metric called the RBR index, as an improved alternative to quantify fire severity. The relationship between fire severity and postfire vegetation together with the threat of invasive tree species is a key aspect of restoration (García-Duro et al, 2016). Postfire vegetation recovery has been widely evaluated using the normalized difference vegetation index (NDVI) (Leon et al, 2012;Meng et al, 2015;Torres et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Assessment of a wildfire in the remaining Nothofagus alessandrii forests, an endangered species of Chile, based on satellite Sentinel-2 images

Santelices-Moya

Cabrera-Ariza

Silva-Flores

et al. 2022

IJANR

View full text Add to dashboard Cite

Nothofagus alessandrii is an endangered species that is naturally distributed in a Mediterranean environment in central Chile. In recent years, this territory has been subject to the effects of climate change, especially an increase in summer temperatures and prolonged periods of drought. In the summer of 2017, there was a fire of great magnitude consuming 184,000 ha, which affected the forests of N. alessandrii. This study assessed the severity and recovery dynamics of postfire vegetation by using spectral indices from Sentinel-2 images. The differenced normalized burn ratio (dNBR), relative differenced normalized burn ratio (RdNBR), and relativized burn ratio (RBR) were calculated before and after the fire and, later, the normalized difference vegetation index (NDVI) before the fire and during three consecutive years after the fire was utilized. The accuracy of the fire severity classifications was estimated using the kappa test (p<0.05). The three severity indices showed a similar classification in severity assessment and postfire response. The low-medium burn area in N. alessandrii forests ranged between 111.2 ha (RdNBR) and 130.3 ha (dNBR), and the high effect was between 46.1 ha (dNBR) and 66.0 ha (RdNBR), which was equivalent in both cases, approximately 11% of the total. Regarding the NDVI, vegetation recovery after three years of the fire showed a systematic return to prefire conditions. The assessment of the effect of a mega forest fire on the remaining forests of N. alessandrii based on Sentinel-2 images offers the opportunity for a better understanding of the severity of damage and the behavior of vegetation after the fire. All this information will help in a better recovery of these forests.

show abstract

Regeneración post-fuego en relación con la severidad del incendio en un área atlántica de Galicia. Bases para la restauración

Abstract: -

Cited by 2 publications

References 7 publications

Niche Characterization of Shrub Functional Groups along an Atlantic-Mediterranean Gradient

Niche Characterization of Shrub Functional Groups along an Atlantic-Mediterranean Gradient

Assessment of a wildfire in the remaining Nothofagus alessandrii forests, an endangered species of Chile, based on satellite Sentinel-2 images

Contact Info

Product

Resources

About