Effects of controlled forest burning and intensity of timber harvesting on the occurrence of pine weevils, Hylobius spp., in regeneration areas

Pitkänen, Aki; Kouki, Jari; Viiri, Heli; Martikainen, Petri

doi:10.1016/j.foreco.2007.09.024

Cited by 14 publications

(7 citation statements)

References 27 publications

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“…Higher catches of walking and flying individuals of Hylobius abietis L. were made in retention groups than in open areas (Pitkänen et al, 2008). It is possible that canopies of retention trees provide alternative food source for Hylobius and, consequently, damage to pine seedlings remains lower in regeneration areas.…”

Section: Ecosystem Functionmentioning

confidence: 98%

Tree retention as a conservation measure in clear-cut forests of northern Europe: a review of ecological consequences

Gustafsson

Kouki

Sverdrup‐Thygeson

2010

Scandinavian Journal of Forest Research

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209

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Since the mid-1990s, it has been common practice to leave trees for biodiversity purposes when clear-cutting in Finland, Norway and Sweden, and regulations for such tree retention are today included in national legislation and certification standards. Peer-reviewed research publications on tree retention from studies performed in the three countries were analyzed and about 50 relevant biodiversity studies were found, with the first published in 1994. Most studies were directed towards beetles and dead wood, especially high stumps. General conclusions were that retention trees (1) provide some of the substrate types required by early-successional species, (2) alleviate the most serious consequences of clear-cutting on biota, and (3) cannot maintain characteristics of intact mature forests. Larger volumes and more trees tend to maintain diversity better. There is a particular lack of studies on dispersal, landscape effects and long-term dynamics. There is a need to study further the relationship between the biota and the amount of trees, as well as their spatial arrangement. Retention trees should preferably be evaluated in relation to other components in multiscaled conservation, including woodland key habitats and larger protected areas.

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Section: Ecosystem Functionmentioning

confidence: 98%

Tree retention as a conservation measure in clear-cut forests of northern Europe: a review of ecological consequences

Gustafsson

Kouki

Sverdrup‐Thygeson

2010

Scandinavian Journal of Forest Research

Self Cite

209

123

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“…Canopy invertebrates have been largely overlooked despite their importance as indicators of forest health in other systems (Landsberg and Wylie 1983;Pitkänen et al 2008). Arboreal invertebrates have been shown to have a close association with edges (Major et al 2003) often evident by the high levels of leaf damage occurring in trees in edge habitats (Port and Thompson 1980;Lowman and Heatwole 1992;Christie and Hochuli 2005).…”

Section: Introductionmentioning

confidence: 99%

Urbanization affects the trophic structure of arboreal arthropod communities

2009

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Urbanization is one of the most significant causes of habitat fragmentation on the planet, resulting in substantial losses of biodiversity and disruptions to ecological processes. We examined the effects of urbanization on the diversity and abundance of arboreal invertebrates in a dominant tree species (Angophora costata) in a highly urbanized landscape in Sydney, Australia, identifying the potential ecological consequences of shifts in diversity. We hypothesized that trophic structure would be influenced by landscape context with a greater richness and abundance of invertebrates in small remnants and edges. Canopy arthropods were sampled via beating from trees in 15 sites in three landscape contexts; five large patches of continuous vegetation, five edges of large patches and five small urban remnants. Trees in large patches supported fewer individuals compared to trees in small urban remnants and edge sites. The composition of assemblages and overall trophic structure also differed between edges and large patches, with a greater abundance of grazing insects in edges. No differences were detected between small urban remnants and edges, suggesting that observed differences might be attributed to an edge effect as opposed to an area effect per se. These changes in trophic structure, revealing a greater abundance of grazing herbivores and a reduced abundance of predators and parasitoids in edge sites, are consistent with work describing elevated levels of herbivory in edges of remnant vegetation. Future management of remnant urban vegetation and associated biodiversity Urban Ecosyst (requires not only an understanding of how trophic status influences the extent of responses by arboreal invertebrate communities, but also how these will affect ecosystem functioning.

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“…High level of retention, however, may protect pine saplings from pine weevil (Hylobius spp.) attacks, perhaps through providing alternative food sources for these beetles (Pitkänen et al 2005(Pitkänen et al , 2008. Selection felling aimed at releasing space for oak trees in southern Swedish mixed forests continues to support saproxylic beetles for at least 10 years postharvest, whereas herbivorous beetles may not show a response any longer (Gran and Götmark 2019).…”

Section: Saproxylic and Other Actively Flying Beetles Short-term Effementioning

confidence: 99%

Experimental evidence on biodiversity impacts of variable retention forestry, prescribed burning, and deadwood manipulation in Fennoscandia

Koivula

Vanha‐Majamaa

2020

Ecol Process

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Intensive forest management has been applied in most Fennoscandian forests for a period of almost one felling rotation. This paradigm has produced even-aged and even-structured forests of different successional stages that cover about 90% of forest land. At the same time, wildfires have been nearly eliminated in most of the Fennoscandian nature. Consequently, hundreds of species are red-listed because of forest management. To support these species, forest management requires improvements. Variable retention forestry and habitat restoration have been suggested to mitigate negative effects of forest management on biodiversity, and these have been practiced to some extent during the past few decades. Here, we review experimental results on the effects of variable retention and two restoration measures (prescribed burning and artificial addition of coarse woody debris) on different species groups in Fennoscandia. Our key findings are as follows: (i) Many species respond positively to felling within a few years, apparently due to released and often ephemeral resources, such as fresh residue and stumps. Species associated with shady conditions are negatively impacted, but any retention supports many of these, and their species composition remains almost unaffected with 50-70% retention of the initial tree volume. (ii) These effects remain detectable for at least 10-30 years or, according to some studies, nearly 100 years, e.g., in polypore fungi. (iii) Initial effects of prescribed burning on most species groups (apart from pyrophiles) are negative, but within 10-15 years post-fire sites begin to support many rare and threatened deadwood-dependent species. Epiphytic lichens, however, remain negatively affected. (iv) Artificial addition of deadwood (mostly high stumps) supports a wide spectrum of deadwood-dependent species, but the species composition differs from that of naturally died trees. (v) Moisture and micro-habitat variation are crucial for forest species at harvested sites, at least in forests dominated by Norway spruce. We conclude that felling method as such is of little importance for threatened forest species, although retention mitigates many negative effects. These species require microclimatic continuity, and maintenance and active increase of legacies, such as deadwood of different qualities (species, downed/standing, snag/log/stump, decay stage), very old trees, and tree species mixtures.

show abstract

Effects of controlled forest burning and intensity of timber harvesting on the occurrence of pine weevils, Hylobius spp., in regeneration areas

Cited by 14 publications

References 27 publications

Tree retention as a conservation measure in clear-cut forests of northern Europe: a review of ecological consequences

Tree retention as a conservation measure in clear-cut forests of northern Europe: a review of ecological consequences

Urbanization affects the trophic structure of arboreal arthropod communities

Experimental evidence on biodiversity impacts of variable retention forestry, prescribed burning, and deadwood manipulation in Fennoscandia

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