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Wildfire yields a distinct turnover of the beetle community in a semi-natural pine forest in northern Sweden

Ecological Processes 2020年第1期9卷 505-516页

作者： Emelie Fredriksson Roger Mugerwa Pettersson Jörgen Naalisvaara therese löfroth Wildlife Fishand Environmental studiesSwedish University of Agricultural SciencesSkogsmarksgränd 1790183 UmeåSweden County Administrative Board of Norrbotten Stationsgatan 597238 LuleåSweden

Background:Fires have been an important natural disturbance and pervasive evolutionary force in the boreal ***,fire suppression has made forest fires rare in the managed landscapes in Fennoscandia,causing significant habitat loss for saproxylic species such as polypores and *** better understand how the beetle community changes(species turnover)after a wildfire in a landscape with intense fire suppression,we monitored beetles with flight intercept traps the first 3 years as well as 12 years after a large wildfire in a national park in northern Sweden(a control/unburnt area was set up for the last year of sampling).Results:Species composition changed significantly among all studied years with a continuous turnover of species following the *** indicator species analysis showed that year 1 post-fire was mostly associated with cambium consumers and also the pyrophilous species Batrisodes *** 2 was the most abundant and species-rich year,with Tomicus piniperda as the most important indicator *** indicator species year 3 were mostly secondary successional species,fungivores,and predators and were characterized by lower species *** 12 had higher diversity compared with year 3 but lower species richness and abundance.A control area was established during year 12 post-fire,and our analyses showed that the control area and burned area differed in species composition suggesting that the beetle community needs longer than 12 years to recover even after a lowintensive ground ***:The wildfire area hosted several red-listed and fire-dependent species suggesting that after a century of landscape-level fire suppression in a semi-natural area,the reintroduction of fire benefits rare and pyrophilous species and still impacts species composition after 12 *** study implies that fire has long-lasting effects on high latitudes and that prescribed burning has the potential to benefit biodiversity over decades in these

关键词： Assemblage Boreal Coleoptera Species composition Conservation Disturbance Diversity Fire suppression Insects Protected area Saproxylic

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