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From mixtures to monocultures: Bird assemblage responses along a production forest conifer-broadleaf gradient

Felton, Adam and Hedwall, Per-Ola and Trubins, Renats and Lagerstedt, Jakob and Felton, Annika and Lindbladh, Matts (2021). From mixtures to monocultures: Bird assemblage responses along a production forest conifer-broadleaf gradient. Forest Ecology and Management. 494 , 119299
[Research article]

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Abstract

Increasing the prevalence of broadleaf trees in conifer-dominated production forests is a recommended means of improving habitat availability for broadleaf and mixed-forest species. The implications for biodiversity are often measured by contrasting broadleaf-conifer mixtures with conifer-dominated stands. However, few studies include broadleaf-dominated stands in these assessments. Here we contrasted the bird assemblages of even-aged production forests along a mixture gradient from Norway spruce (Picea abies) dominated, to birch (Betula spp.) dominated stands in southern Sweden. We conducted point count surveys of bird individuals exhibiting breeding behaviour within 30 stands varying from <0.5% to over 98.5% broadleaf by basal area. A total of 355 birds were detected, comprising 36 bird species, seven of which are classified as near threatened by the Swedish Red-list. Our results indicate i) a distinct shift in bird community composition linked to the percentage of broadleaf trees at stand and landscape scales, ii) significantly higher bird species richness, evenness, and abundance in stands with a higher proportion of birch, iii) higher bird abundance in birch-dominated stands than in mixtures, and iv) shifts in bird species guilds as related to stand basal area, the amount of shrubs in the understory, and quantities of dead wood. All of these results have implications for the ways in which production forest management could be altered to enhance avian diversity, and we discuss these with respect to the use of broadleaf versus mixed-species stands.

Authors/Creators:Felton, Adam and Hedwall, Per-Ola and Trubins, Renats and Lagerstedt, Jakob and Felton, Annika and Lindbladh, Matts
Title:From mixtures to monocultures: Bird assemblage responses along a production forest conifer-broadleaf gradient
Series Name/Journal:Forest Ecology and Management
Year of publishing :2021
Volume:494
Article number:119299
Number of Pages:10
Publisher:ELSEVIER
ISSN:0378-1127
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 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Mixed species stands, Forest biodiversity, Bird conservation, Managed forest, Broadleaved forest
URN:NBN:urn:nbn:se:slu:epsilon-p-112586
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112586
Additional ID:
Type of IDID
DOI10.1016/j.foreco.2021.119299
Web of Science (WoS)000657599700001
ID Code:24755
Faculty:S - Faculty of Forest Sciences
Department:(S) > Southern Swedish Forest Research Centre
Deposited By: SLUpub Connector
Deposited On:29 Jun 2021 14:25
Metadata Last Modified:29 Jun 2021 14:31

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