Relative importance of habitat characteristics at multiple spatial scales for wood-dependent beetles in boreal forest

Ranius, Thomas; Johansson, Victor; Schroeder, Martin; Caruso, Alexandro

doi:10.1007/s10980-015-0221-5

Cited by 28 publications

(20 citation statements)

References 55 publications

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“…Availability of deadwood resources was measured as the total volume of deadwood (m 3 ) multiplied by the diversity of 20 deadwood types (20 combinations of four tree species (Scots pine Pinus sylvestris , Norway spruce Picea abies and two species of birch, Betula pendula and Betula pubescens ) and five decay stages; decay stages from Mäkinen et al [40]). We accounted for deadwood diversity in the measure as it has been suggested to be of key importance for species occurrence [32,41]. The diversity of deadwood types was measured with Simpson’s index of diversity.…”

Section: Methodsmentioning

confidence: 99%

“…refraining from thinnings) [22,30]. Increasing the amount and diversity of deadwood resources in forests is the first step towards promoting deadwood-dependent biodiversity [31,32]. Landscape-level planning has been widely utilized in land-use optimization to maximize conservation benefits while minimizing economic or opportunity costs [16,18,33,34].…”

Section: Introductionmentioning

confidence: 99%

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Forest management optimization across spatial scales to reconcile economic and conservation objectives

2019

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Conflicts between biodiversity conservation and resource production can be mitigated by multi-objective management planning. Optimizing management for multiple objectives over larger land areas likely entails trading off the practicability of the process against the goodness of the solution. It is therefore worthwhile to resolve how large areas are required as management planning regions to reconcile conflicting objectives as effectively as possible. We aimed to reveal how the extent of forestry planning regions impacts the potential to mitigate a forestry-conservation conflict in Finland, represented as a trade-off between harvest income and deadwood availability. We used forecasted data from a forest simulator, a hierarchy of forestry planning regions, and an optimization model to explore the production possibility frontier between harvest income and deadwood. We compared the overall outcomes when management was optimized within the different-sized planning regions in terms of the two objectives, the spatial variation of deadwood, and the optimal combinations of management regimes. Increasing the size of the planning regions did produce higher simultaneous levels of the two objectives, but the differences were most often of the magnitude of only a few percentages. The differences among the scales were minor also in terms of the spatial variation in deadwood availability and in the optimal management combinations. The conflict between timber harvesting and deadwood availability is only marginally easier to mitigate at large spatial scales than at small forest ownership scales. However, regardless of the spatial scale of planning, the achievable solutions may not be good enough to safeguard deadwood-dependent biodiversity without active deadwood creation.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Forest management optimization across spatial scales to reconcile economic and conservation objectives

2019

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“…In a boreal forest landscape in central Sweden, we surveyed dead wood in all main types of forest stands. In this landscape, there is no sign of dispersal constraints in the distribution pattern of the great majority of all dead-wood-dependent beetle species and characteristics of dead-wood items have been found to explain beetle species’ occurrence patterns to a much higher extent than stand characteristics (Ranius et al 2015). We relate species pool size to habitat extent in unmanaged forests, since they reflect historical conditions better than the managed forest stands that are currently dominant in the region.…”

Section: Introductionmentioning

confidence: 91%

“…Intensive forestry may decrease the volume of logs and snags to only a tenth of natural volumes (Siitonen 2001), and therefore, the amount of dead wood has to be maintained or restored to preserve forest biodiversity. Species in dead wood have been shown to be associated with characteristics of individual dead-wood items, such as tree species, diameter, and position (standing/downed) (fungi: Berglund et al 2011; Junninen and Komonen 2011; lichens: Humphrey et al 2002; beetles: Ranius et al 2015). For dead-wood habitats, the evolutionary species pool hypothesis suggests that dead-wood types utilized by most species are those formed by tree mortality factors that were most abundant under pre-human conditions, while dead-wood types to a higher extent created by forestry operations are used by fewer species, since such types have only recently become abundant.…”

Section: Introductionmentioning

confidence: 99%

The evolutionary species pool concept does not explain occurrence patterns of dead-wood-dependent organisms: implications for logging residue extraction

et al. 2019

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Emulation of natural disturbances is often regarded as a key measure to make forestry biodiversity-oriented. Consequently, extraction of logging residues is assumed to have little negative effect in comparison to extraction of dead wood mainly formed at natural disturbances. This is consistent with the evolutionary species pool hypothesis, which suggests that most species are evolutionary adapted to the naturally most abundant habitats. We tested this hypothesis for dead-wood-dependent macrofungi, lichens, and beetles in a boreal forest landscape in central Sweden, assuming that species are adapted to conditions similar to today’s unmanaged forest. No occurrence patterns, for the species groups which we investigated, were consistent with the hypothesis. Overall, stumps and snags had the highest habitat quality (measured as average population density with equal weight given to each species) and fine woody debris the lowest, which was unexpected, since stumps were the rarest dead-wood type in unmanaged forest. We conclude that the evolutionary species pool concept did not explain patterns of species’ occurrences, and for two reasons, the concept is not reliable as a general rule of thumb: (1) what constitute habitats harbouring different species communities can only be understood from habitat-specific studies and (2) the suitability of habitats is affected by their biophysical characteristics. Thus, emulation of natural disturbances may promote biodiversity, but empirical studies are needed for each habitat to understand how natural disturbances should be emulated. We also conclude that stump extraction for bioenergy is associated with larger risks for biodiversity than fine woody debris extraction. Electronic supplementary material The online version of this article (10.1007/s00442-019-04473-2) contains supplementary material, which is available to authorized users.

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“…The effects of the species composition of overstory trees and/or their age (Heyborne et al, 2003;Wiezik et al, 2007;Samu et al, 2014;Stašiov et al, 2017), quality and amount of leaf litter and coarse woody debris (Castro & Wise, 2010;Ranius et al, 2015), canopy closure and/or deer density (Spitzer et al, 2008;Isaia et al, 2015;Košulič et al, 2016) on spatial distribution of invertebrates, species richness, abundance and composition have been documented in many studies.…”

mentioning

confidence: 99%

Response of ground-dwelling harvestman assemblages (Arachnida: Opiliones) to European beech forest canopy cover

Černecká¹,

Mihál²,

Jarčuška³

2017

Eur. J. Entomol.

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Abstract.We studied the effects of the overstory canopy cover on ground-dwelling harvestmen communities in European beech forests in the Western Carpathian Mts. We analyzed the differences in species richness, abundance and composition in two tree canopy cover categories (closed and open canopy). Overall, 1765 individuals belonging to 16 species were caught using pitfall traps. Repeated-measures ANOVA revealed that under both closed and open canopies a similar absolute and rarefi ed species richness and number of individuals (standardized to 100 pitfall trap days) were caught, and that both species richness and abundance were affected by the season (i.e., time of trap replacement); yet the total number of individuals trapped was more than two times greater under the open canopy than under the closed canopy. Despite the subtle differences in the taxonomic composition of the catches under the open and closed canopies revealed by DCA followed by RDA, the composition of ground-dwelling harvestmen assemblages differed under the two canopy covers. The open canopy was more suitable for heliophilic, xerothermic eurytopic harvestmen species typical for open and ecotonal habitats, such as Egaenus convexus (C.L. Koch) and Oligolophus tridens (C.L. Koch) but still suitable for hemihygrophilic Lophopilio palpinalis (Herbst). The closed canopy stands were preferred by shade-tolerant, hygrophilic eurytopic harvestmen species, such as Trogulus sp. Latreille, Dicranolasma scabrum (Herbst) and Platybunus bucephalus (C.L. Koch). Our results highlight the importance of intra-habitat heterogeneity of a harvestmen community.

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Relative importance of habitat characteristics at multiple spatial scales for wood-dependent beetles in boreal forest

Cited by 28 publications

References 55 publications

Forest management optimization across spatial scales to reconcile economic and conservation objectives

Forest management optimization across spatial scales to reconcile economic and conservation objectives

The evolutionary species pool concept does not explain occurrence patterns of dead-wood-dependent organisms: implications for logging residue extraction

Response of ground-dwelling harvestman assemblages (Arachnida: Opiliones) to European beech forest canopy cover

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