Fire hazard modulation by long-term dynamics in land cover and dominant forest type in eastern and central Europe

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F20%3A00533368" target="_blank" >RIV/67985939:_____/20:00533368 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/20:10422591

Výsledek na webu

<a href="https://doi.org/10.5194/bg-17-1213-2020" target="_blank" >https://doi.org/10.5194/bg-17-1213-2020</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/bg-17-1213-2020" target="_blank" >10.5194/bg-17-1213-2020</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fire hazard modulation by long-term dynamics in land cover and dominant forest type in eastern and central Europe

Popis výsledku v původním jazyce

Wildfire occurrence is influenced by climate, veg- etation and human activities. A key challenge for understand- ing the risk of fires is quantifying the mediating effect of veg- etation on fire regimes. Here, we explore the relative impor- tance of Holocene land cover, land use, dominant functional forest type, and climate dynamics on biomass burning in tem- perate and boreo-nemoral regions of central and eastern Eu- rope over the past 12 kyr. We used an extensive data set of Holocene pollen and sedimentary charcoal records, in com- bination with climate simulations and statistical modelling. Biomass burning was highest during the early Holocene and lowest during the mid-Holocene in all three ecoregions (At- lantic, continental and boreo-nemoral) but was more spatially variable over the past 3–4 kyr. Although climate explained a significant variance in biomass burning during the early Holocene, tree cover was consistently the highest predictor of past biomass burning over the past 8 kyr. In temperate forests, biomass burning was high at ∼ 45% tree cover and de- creased to a minimum at between 60% and 70% tree cover. In needleleaf-dominated forests, biomass burning was high- est at ∼60 %–65% tree cover and steeply declined at > 65%tree cover. Biomass burning also increased when arable lands and grasslands reached ∼15 %–20%, although this relation- ship was variable depending on land use practice via ignition sources, fuel type and quantities. Higher tree cover reduced the amount of solar radiation reaching the forest floor and could provide moister, more wind-protected microclimates underneath canopies, thereby decreasing fuel flammability. Tree cover at which biomass burning increased appears to be driven by warmer and drier summer conditions during the early Holocene and by increasing human influence on land cover during the late Holocene. We suggest that long- term fire hazard may be effectively reduced through land cover management, given that land cover has controlled fire regimes under the dynamic climates of the Holocene.

Název v anglickém jazyce

Fire hazard modulation by long-term dynamics in land cover and dominant forest type in eastern and central Europe

Popis výsledku anglicky

Wildfire occurrence is influenced by climate, veg- etation and human activities. A key challenge for understand- ing the risk of fires is quantifying the mediating effect of veg- etation on fire regimes. Here, we explore the relative impor- tance of Holocene land cover, land use, dominant functional forest type, and climate dynamics on biomass burning in tem- perate and boreo-nemoral regions of central and eastern Eu- rope over the past 12 kyr. We used an extensive data set of Holocene pollen and sedimentary charcoal records, in com- bination with climate simulations and statistical modelling. Biomass burning was highest during the early Holocene and lowest during the mid-Holocene in all three ecoregions (At- lantic, continental and boreo-nemoral) but was more spatially variable over the past 3–4 kyr. Although climate explained a significant variance in biomass burning during the early Holocene, tree cover was consistently the highest predictor of past biomass burning over the past 8 kyr. In temperate forests, biomass burning was high at ∼ 45% tree cover and de- creased to a minimum at between 60% and 70% tree cover. In needleleaf-dominated forests, biomass burning was high- est at ∼60 %–65% tree cover and steeply declined at > 65%tree cover. Biomass burning also increased when arable lands and grasslands reached ∼15 %–20%, although this relation- ship was variable depending on land use practice via ignition sources, fuel type and quantities. Higher tree cover reduced the amount of solar radiation reaching the forest floor and could provide moister, more wind-protected microclimates underneath canopies, thereby decreasing fuel flammability. Tree cover at which biomass burning increased appears to be driven by warmer and drier summer conditions during the early Holocene and by increasing human influence on land cover during the late Holocene. We suggest that long- term fire hazard may be effectively reduced through land cover management, given that land cover has controlled fire regimes under the dynamic climates of the Holocene.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Biogeosciences

ISSN

1726-4170

e-ISSN

—

Svazek periodika

17

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

18

Strana od-do

1213-1230

Kód UT WoS článku

000518816300001

EID výsledku v databázi Scopus

2-s2.0-85081277082