Dead wood availability in managed Swedish forests – Policy outcomes and implications for biodiversity

Jonsson, Bengt Gunnar; Ekström, Magnus; Esseen, Per‐Anders; Grafström, Anton; Ståhl, Göran; Westerlund, Bertil

doi:10.1016/j.foreco.2016.06.017

Cited by 82 publications

(56 citation statements)

References 29 publications

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“…Th is study also confi rms that DW in forest ecosystems, especially those that heavily economically exploited, is a key habitat for bryophytes (Strazdiņa 2010;Jonsson et al 2016). Not only was the largest number of species recorded here, but also in the stands in which the conditions were unfavorable for the development of the moss layer, DW was sometimes the only enclave for terrestrial species (as is the case with TB).…”

Section: Discussionsupporting

confidence: 62%

“…Th e occurrence of dead wood in diff erent stages of decay is also very important for richness of bryophytes (Evans et al 2012;Hofmeister et al 2015;Jonsson et al 2016). Dead wood is usually harvested in managed forests, although it is one of the key habitats in the forest structure and is the substrate for many, diff erent bryophytes (Samuelsson et al 1994;Humphrey et al 2003;Strazdiņa 2010).…”

Section: Introductionmentioning

confidence: 99%

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Response of Bryophytes to Disturbances in Managed Forests. A Case Study from a Polish Forest

Fojcik

Wierzgoń

Chmura

2019

Cryptogamie, Bryologie

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Section: Discussionsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Response of Bryophytes to Disturbances in Managed Forests. A Case Study from a Polish Forest

Fojcik

Wierzgoń

Chmura

2019

Cryptogamie, Bryologie

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“…Generally, the amount of downed log volume is usually larger than snag volume [44,62,63]. In this study, only the EAC followed this pattern, while the MAC and DAC showed higher numbers of snags.…”

Section: Components Of Cwdmentioning

confidence: 45%

“…Müller et al [68] observed that many saproxylic beetles benefit from former fungal colonization, increasing species numbers in higher stages of wood decay. The level of snag decay is another important factor driving management decisions in sustainable forest management [62,77]. In order to maximize wildlife benefits and, more generally, biodiversity protection, a variety of CWD decay classes is necessary.…”

Section: Decay Class Of Cwdmentioning

confidence: 99%

Coarse Woody Debris Variability Due to Human Accessibility to Forest

Behjou

Monaco

Tavankar

et al. 2018

Forests

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Coarse woody debris (CWD) plays an important role in supporting biodiversity and assisting ecological processes. Sometimes local people intervene modifying the expected distribution of CWD components, harvested as fuel wood. The effect of the human accessibility (HA) on the volume and characteristics of CWD (snag, downed log and stump) was investigated in the natural uneven-age mixed hardwood stands of the Hyrcanian forests of Iran to quantify the impact on CWD. The HA was classified into three classes (easy, medium and difficult) on the basis of slope class, slope direction to the nearest road and road type. As expected, a negative relationship between the degree of accessibility was found with respect to the main qualitative and quantitative indices referring to CWD. The results showed that the volume of CWD decreased with an increase in human accessibility class (HAC), thus the mean volume of CWD in the difficult, medium and easy accessibility classes were 14.87 m 3 ha −1 , 8.84 m 3 ha −1 and 4.03 m 3 ha −1 , respectively. The decrease in CWD volume was more associated with the decreasing volume of small diameter of low decayed downed logs. The ratio of snag volume to standing volume, the ratio of downed log volume to the volume of trees and the ratio of CWD volume to standing volume increased with a decrease in HAC, while the ratio of downed log volume to snag volume decreased with a decrease in HAC. No selective behaviour on the botanical species of CWD was recorded. For ecological forest management, the effect of HAC on CWD should be considered. A constant supply of snags and downed logs must be preserved to assure a high level of biodiversity. To balance social needs and biodiversity requirements, an increased level of CWD retention might be needed in areas with easy accessibility. The obtained results may be useful when ecological and socio-economical needs have to be taken into consideration in future policy-making decisions.

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“…For certain dead wood types the decrease may have been even stronger. In managed forests, CWD of deciduous species, of large dimension and from late decay stages, are particularly rare (Jonsson et al 2016). A large proportion of forest-dwelling species requires dead wood (Jonsson et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Large proportion of wood dependent lichens in boreal pine forest are confined to old hard wood

et al. 2017

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Intensive forest management has led to a population decline in many species, including those dependent on dead wood. Many lichens are known to depend on dead wood, but their habitat requirements have been little studied. In this study we investigated the habitat requirements of wood dependent lichens on coarse dead wood (diameter [10 cm) of Scots pine Pinus sylvestris in managed boreal forests in central Sweden. Twenty-one wood dependent lichen species were recorded, of which eleven were confined to old (estimated to be [120 years old) and hard dead wood. Almost all of this wood has emanated from kelo trees, i.e. decorticated and resin-impregnated standing pine trees that died long time ago. We found four red-listed species, of which two were exclusive and two highly associated with old and hard wood. Lichen species composition differed significantly among dead wood types (low stumps, snags, logs), wood hardness, wood age and occurrence of fire scars. Snags had higher number of species per dead wood area than logs and low stumps, and old snags had higher number of species per dead wood area than young ones. Since wood from kelo trees harbours a specialized lichen flora, conservation of wood dependent lichens requires management strategies ensuring the future presence of this wood type. Besides preserving available kelo wood, the formation of this substratum should be supported by setting aside P. sylvestris forests and subject these to prescribed burnings as well as to allow wild fires in some of these forests.

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Dead wood availability in managed Swedish forests – Policy outcomes and implications for biodiversity

Cited by 82 publications

References 29 publications

Response of Bryophytes to Disturbances in Managed Forests. A Case Study from a Polish Forest

Response of Bryophytes to Disturbances in Managed Forests. A Case Study from a Polish Forest

Coarse Woody Debris Variability Due to Human Accessibility to Forest

Large proportion of wood dependent lichens in boreal pine forest are confined to old hard wood

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