Pyrogeography across the western Palaearctic: A diversity of fire regimes

Pausas, Juli G.

doi:10.1111/geb.13569

Cited by 24 publications

(18 citation statements)

References 62 publications

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“…This is particularly noteworthy as many ecosystems in Europe (e.g., in the temperate biome) are not well adapted to high fire activity (i.e. lacking important fire resistance and response traits, such as thick bark, serotiny and the ability to resprout after fire; Keeley et al, 2011; Pausas, 2022). Likewise, societies are not yet well‐prepared to live with fire in many temperate and boreal regions of Europe, suggesting that social‐ecological adaptation measures are needed.…”

Section: Discussionmentioning

confidence: 99%

Increasing aridity causes larger and more severe forest fires across Europe

Grünig

Seidl

Senf

2022

Global Change Biology

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Seidl & Turner, 2022). Increasing summer aridity has been suggested as a main driver of changing forest fire regimes (Huang et al., 2020;Jolly et al., 2015;Williams et al., 2019). For instance, increasing aridity and the resultant dryer fuels led to a fivefold increase in area burned in California over the past 50 years (Williams et al., 2019).Extreme events like the Black Summer of 2019/2020 in Australia are expected to become more frequent (Abram et al., 2021) as increasing temperatures and changing precipitation patterns promote more extreme fire weather (Chiang et al., 2021;Jain et al., 2022;Vicente-Serrano et al., 2020). Increasing forest fire activity could have a number of negative effects on forest ecosystem functions, including a reduction in ecosystem carbon storage (Bowman et al., 2021;

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Section: Discussionmentioning

confidence: 99%

Increasing aridity causes larger and more severe forest fires across Europe

Grünig

Seidl

Senf

2022

Global Change Biology

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“…The area surrounding the sites can be considered similar to them in regard to their fire‐proneness. Thus, using relatively large areas allows for estimating some long‐term fire regime parameters, even with relatively short fire data (Hanes et al 2019, Pausas 2022). That is, sites in areas with recent high fire activity are in more fire‐prone environments and thus, they are more likely to have suffered recurrent (overlapping) fires with short fire intervals than sites located in areas with low fire activity in the last 37 years (less fire‐prone).…”

Section: Methodsmentioning

confidence: 99%

Fire favors sexual precocity in a Mediterranean pine

Guiote

Pausas

2022

Oikos

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Wildfires are a natural disturbance in many ecosystems. Consequently, plant species have acquired traits that allow them to resist and regenerate in an environment with recurrent fires. A key trait in fire‐prone ecosystems is the age at first reproduction (maturity age); populations of non‐resprouting species cannot persist when the fire interval is shorter than this age. Maturity age is variable among individuals, so we hypothesized that short fire intervals select for early seed production (precocity). We selected 13 plots with different fire regimes in eastern Spain, all dominated by Pinus halepensis (a non‐resprouting serotinous pine species). Then, we evaluated the age at first reproduction and the size of the canopy seed bank of each individual tree. Our results show a significant effect of fire regime on the onset of reproduction in this species, suggesting a selection towards higher precocity in populations subject to shorter fire intervals. Due to this higher precocity, pines stored more cones and therefore, increased their potential for reproduction post‐fire. We provide the first field evidence that fire can act as a driver of precocity. Being precocious in fire‐prone environments is adaptive because it increases the probability of having a significant seed bank when the next fire arrives.

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“…Despite the apparently null impact of fire for amphibian species, climate and socioeconomic factors are modifying fire regimes in many regions towards bigger, more intense and frequent fires (Pausas, 2022). This shift in fire regimes can modify the landscape structure and forest composition, which indirectly can affect amphibi-an community composition.…”

Section: Discussionmentioning

confidence: 99%

The resilience of amphibians to wildfire is habitat dependent

Chergui¹,

Ayres²,

Santos

2022

bah

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Climate and socioeconomic factors are modifying fire regimes. In this scenario, some taxa such as amphibians may be increasingly vulnerable. However, knowledge concerning how amphibian species respond to wildfires is limited and information is puzzling, with studies reporting positive, negative or neutral responses. We examined amphibian species occurrence after a 1600-ha fire in a fire-active region located in the north-western Iberian Peninsula. This area is a biogeographical crossroad where Atlantic and Mediterranean amphibian species can coexist in the same ponds. We sampled 33 water points in native (mainly oak) and non-native (eucalyptus) forests. Water points were sampled in two different periods: just after the fire to report direct mortality (resistance to fire), and two years after the fire to evidence resilience. We examined the influence of forest type and fire occurrence on the number of amphibian species detected per point (species richness). Species richness per point varied both depending on forest type (i.e. higher richness in the native forest) and fire occurrence (i.e. more species at burnt points). The occurrence of Atlantic species did not change with fire at native forest points but declined in exotic forest points affected by fire. Mediterranean species richness was higher at native than exotic points, as the number of species increased in native burnt forests, benefiting from the open spaces cleared by the fire. This study identified the negative effect of eucalyptus plantations on amphibians and showed that the response of this taxon to fire is shaped by species-specific bioregion affinity.

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Pyrogeography across the western Palaearctic: A diversity of fire regimes

Cited by 24 publications

References 62 publications

Increasing aridity causes larger and more severe forest fires across Europe

Increasing aridity causes larger and more severe forest fires across Europe

Fire favors sexual precocity in a Mediterranean pine

The resilience of amphibians to wildfire is habitat dependent

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