Home About Browse Search
Svenska


Burn severity and soil chemistry are weak drivers of early vegetation succession following a boreal mega-fire in a production forest landscape

Gustafsson, Lena and Granath, Gustaf and Nohrstedt, Hans-Örjan and Leverkus, Alexandro B. and Johansson, Victor (2021). Burn severity and soil chemistry are weak drivers of early vegetation succession following a boreal mega-fire in a production forest landscape. Journal of Vegetation Science. 32 , e12966
[Research article]

[img] PDF
1MB

Abstract

Questions Do burn severity and soil chemistry drive species and trait composition on recently burned clear-cuttings? Does the spatial distribution of common, easily dispersed colonizers vary with distance to fire perimeter?Location A 13,000 ha production forest landscape in boreal southern Sweden burned in a wildfire in 2014.Methods Vascular plants and bryophytes were recorded in permanent plots on clear-cuts two and five years following fire, covering a burn severity gradient. Soil carbon content (reflecting burn severity), pH and nutrients were measured at plot level. Trait data were retrieved from the BIEN and LEDA databases and analyzed using community-weighted mean (CWM) trait values. Statistical analyses included generalized linear mixed models (GLMMs), non-metric multidimensional scaling (NMDS) and multivariate ANOVA.Results Low burn severity resulted in higher frequency of legacy species (e.g. Vaccinium myrtillus), while high burn severity facilitated colonizing species (e.g. Senecio sylvaticus). Vegetation varied with soil chemistry, expressed through pH. Species composition changed between years and deviated from unburned clear-cuts. After five years the most common taxa on burned plots were the vascular plants Chamaenerion angustifolium, Betula spp. and Populus tremula and the bryophytes Ceratodon purpureus and Polytrichum juniperinum. CWM specific leaf area (SLA) decreased markedly with time and root buds increased with total carbon content in the soil (i.e., toward less severely burned plots), while soil pH was not associated with any studied trait. Chamaenerion angustifolium decreased with distance to the fire perimeter, while Ceratodon purpureus increased.Conclusions Burn severity and soil pH weakly drive vegetation dynamics in the early phase following fire on clear-cuts, indicating a large influence of stochastic processes. Deciduous trees are common already after five years and their further expansion will affect light and nutrient availability. To understand future vegetation trajectories on burned clear-cuts, studies need to incorporate the light factor and links between tree species' identity and soil nutrient availability.

Authors/Creators:Gustafsson, Lena and Granath, Gustaf and Nohrstedt, Hans-Örjan and Leverkus, Alexandro B. and Johansson, Victor
Title:Burn severity and soil chemistry are weak drivers of early vegetation succession following a boreal mega-fire in a production forest landscape
Series Name/Journal:Journal of Vegetation Science
Year of publishing :2021
Volume:32
Article number:e12966
Number of Pages:13
Publisher:WILEY
ISSN:1100-9233
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:bryophyte, Chamaenerion angustifolium, clear‐cut, disturbance, fire, production forest, Senecio sylvaticus, succession, Sweden, traits, Vaccinium, vascular plant, vegetation
URN:NBN:urn:nbn:se:slu:epsilon-p-109377
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109377
Additional ID:
Type of IDID
DOI10.1111/jvs.12966
Web of Science (WoS)000590696300001
ID Code:23704
Faculty:S - Faculty of Forest Sciences
NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology

(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:18 May 2021 12:43
Metadata Last Modified:18 May 2021 12:51

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits