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Forest biodiversity and ecosystem services from spruce-birch mixtures: The potential importance of tree spatial arrangement

Felton, Adam and Felton, Annika and Wam, Hilde Karin and Witzell, Johanna and Wallgren, Märtha and Löf, Magnus and Sonesson, Johan and Lindbladh, Matts and Björkman, Christer and Blennow, Kristina and Cleary, Michelle and Jonsell, Mats and Klapwijk, Maartje and Niklasson, Mats and Petersson, Lisa and Rönnberg, Jonas and Ode Sang, Åsa and Wrethling, Fredrika and Hedwall, Per-Ola (2022). Forest biodiversity and ecosystem services from spruce-birch mixtures: The potential importance of tree spatial arrangement. Environmental Challenges. 6 , 100407
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Abstract

There is increasing empirical support for the biodiversity and ecosystem service (ES) benefits of mixed-species production forests. However, few studies control for the spatial arrangement of the trees within mixtures to determine the influence that clustering the tree species (patch scale mixtures), versus evenly dispersing them (intimate scale mixtures), may have for biodiversity and ES outcomes. To highlight the potential implications of altering tree spatial arrangement in mixtures, and the need to fill related knowledge gaps, here we provide a qualitative multi-disciplinary overview of ecological and socio-economic drivers with the potential to alter biodiversity, ecosystem services, and management-related outcomes from patch versus intimate scale mixtures. We focused our overview on even-aged mixtures of Norway spruce ( Picea abies ) and birch ( Betula pendula or B. pubescens ) in Sweden, which enabled us to contrast findings within a biogeographical and silvicultural setting. Specifically, we targeted implications for biodiversity (understory vascular plants, epiphytic lichens, saproxylic beetles, birds), biomass production, harvesting costs, management ease, recreation and aesthetics, cervid game, as well as abiotic and biotic risks (wind, fire, pathogens, pests, browsing damage). In the absence of direct empirical evidence, we primarily relied on expert inference from theory and relevant empirical studies sourced from the Fennoscandian region, and further afield if needed. Collectively these efforts allowed us to develop a number of informed hypotheses indicating that for spruce-birch mixtures in this region, patch scale mixtures may have the potential to favour the diversity of several forest dependant taxonomic groups, cervid game and reduce harvesting costs, whereas intimate mixtures may have the potential to reduce pathogen and pest damage, and likewise, potentially benefit production outcomes. Current knowledge was too limited, inconsistent or context dependant to even tentatively infer outcomes for fire risk, wind damage, browsing damage, management ease, recreational and aesthetic outcomes. We emphasize that our hypotheses require testing, but are sufficient to (1) highlight the likely importance of spatial-scale to biodiversity and ecosystem services outcomes in mixed-species production forests, (2) caution against generalization from mixture studies that lack scale considerations, and (3) motivate the targeted consideration of spatial grain in future mixture studies.

Authors/Creators:Felton, Adam and Felton, Annika and Wam, Hilde Karin and Witzell, Johanna and Wallgren, Märtha and Löf, Magnus and Sonesson, Johan and Lindbladh, Matts and Björkman, Christer and Blennow, Kristina and Cleary, Michelle and Jonsell, Mats and Klapwijk, Maartje and Niklasson, Mats and Petersson, Lisa and Rönnberg, Jonas and Ode Sang, Åsa and Wrethling, Fredrika and Hedwall, Per-Ola
Title:Forest biodiversity and ecosystem services from spruce-birch mixtures: The potential importance of tree spatial arrangement
Series Name/Journal:Environmental Challenges
Year of publishing :2022
Volume:6
Article number:100407
Number of Pages:11
Language:English
Publication Type:Article Review/Survey
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
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:biological diversity, ecosystem services, forestry, mixed-forest stand, tree plantations, species conservation
URN:NBN:urn:nbn:se:slu:epsilon-p-114793
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114793
Additional ID:
Type of IDID
DOI10.1016/j.envc.2021.100407
ID Code:26377
Faculty:S - Faculty of Forest Sciences
NJ - Fakulteten för naturresurser och jordbruksvetenskap
LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(S) > Southern Swedish Forest Research Centre
(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology

(LTJ, LTV) > Department of Landscape Architecture, Planning and Management
Deposited By: SLUpub Connector
Deposited On:22 Dec 2021 13:25
Metadata Last Modified:22 Dec 2021 13:31

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