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Mixed-severity natural disturbance regime dominates in an old-growth Norway spruce forest of northwest Russia

Khakimulina, Tatiana and Fraver, Shawn and Drobyshev, Igor (2016). Mixed-severity natural disturbance regime dominates in an old-growth Norway spruce forest of northwest Russia. Journal of vegetation science. 27:2, 400-413
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Abstract

Questions: What were the long-term disturbance rates (including variability) and agents in pristine Norway spruce-dominated (Picea abies (L.) Karst.) forests? Have soil moisture conditions influenced disturbance rates across this boreal spruce-dominated forest? Were the temporal recruitment patterns of canopy dominants associated with past disturbance periods?
Location: Interfluvial region of Northern Dvina and Pinega rivers, Arkhangelsk, northwest Russia.
Methods: We linked dendrochronological data with tree spatial data (n trees=1659) to reconstruct the temporal and spatial patterns of canopy gaps in a 1.8-ha area from 1831-2008, and to develop a growth-release chronology from 1775-2008.
Results: No evidence of stand-replacing disturbances was found within selected forest stands over the studied period. Forest dynamics were driven by small- to moderate-scale canopy disturbances, which maintained a multi-cohort age structure. Disturbance peaks were observed in the 1820s, 1920s, 1970s and 2000s, with decadal rates reaching 32% of the stand area disturbed.
Conclusions: The overall mean decadal rate was 8.3% canopy area disturbed, which suggests a canopy turnover time of 122yr, with a 95% confidence envelop of 91-186yr. Bark beetle outbreaks (possibly exacerbated by droughts) and wind-storms emerged as the principal disturbance agents. Recruitment of both Norway spruce and downy birch was associated with periods of increased canopy disturbance. Moisture conditions (moist vs mesic stands) were not significantly related to long-term disturbance rates. The studied spruce-dominated boreal forests of this region apparently exhibited long-term forest continuity under this mixed-severity disturbance regime. These disturbances caused considerable structural alterations to forest canopies, but apparently did not result in a pronounced successional shifts in tree species composition, rather occasional minor enrichments of birch in these heavily spruce-dominated stands.

Authors/Creators:Khakimulina, Tatiana and Fraver, Shawn and Drobyshev, Igor
Title:Mixed-severity natural disturbance regime dominates in an old-growth Norway spruce forest of northwest Russia
Series/Journal:Journal of vegetation science (0128-1283)
Year of publishing :2016
Volume:27
Number:2
Page range:400-413
Number of Pages:14
Publisher:Wiley
ISSN:0128-1283
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
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
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Other Biological Topics
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Boreal forest, Canopy gaps, Dendroecology, European spruce bark beetle, Forest continuity, Insect outbreaks, Natural disturbances, Northern Europe
URN:NBN:urn:nbn:se:slu:epsilon-e-3564
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3564
Additional ID:
Type of IDID
Web of Science (WoS)000370621500019
DOI10.1111/jvs.12351
ID Code:13522
Faculty:S - Faculty of Forest Sciences
Department:(S) > Southern Swedish Forest Research Centre
Deposited By: SLUpub Connector
Deposited On:14 Jul 2016 07:04
Metadata Last Modified:17 Oct 2016 23:15

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