Influence of climate and forest management on damage risk by the pine weevil Hylobius abietis in northern Sweden

Nordlander, Göran; Mason, Euan G.; Hjelm, Karin; Nordenhem, Henrik; Hellqvist, Claes

doi:10.14214/sf.7751

Cited by 20 publications

(20 citation statements)

References 57 publications

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“…In the future, the risk of drought-induced damage may increase in spring and early summer, compared to the present, due to shallower snow depth and earlier snow melt under a warming climate (Ruosteenoja et al 2018). The risk of pine weevil damage may also increase under warmer growing conditions in young plantations without proper site preparation and planting work quality (Nordlander et al 2017;Wallertz et al 2018). These factors should be considered while planning the timing for planting operations, regardless of tree species.…”

Section: Discussionmentioning

confidence: 99%

Comparison of planting success in one-year-old spring, summer and autumn plantings of Norway spruce and Scots pine under boreal conditions

Pikkarainen¹,

Luoranen²,

Kilpeläinen³

et al. 2020

Silva Fenn.

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In Nordic countries, tree planting of seedlings is mainly performed during spring and early summer. Interest has increased in extending the planting window throughout the unfrozen growing season. This study compared the success of one-year-old spring, summer and autumn plantings in practical forestry in Norway spruce ( (L.) Karst.) and Scots pine ( L.) in southern and central Finland. Planting success was based on the number of viable seedlings per hectare relative to a species-specific target density. The influence of different factors to poor planting results were determined, including quality of site preparation and planting, and sources of natural damage. Overall, in Norway spruce, 85, 69 and 84% and in Scots pine 53, 55 and 40% of spring, summer and autumn plantings succeeded. In Norway spruce, the planting results were consistent between the southern and central regions, whereas in Scots pine, the success was slightly lower in the south. The poor work quality and a low density of appropriate planting spots, contributed to poor planting results, regardless of planting season, region or tree species. Considering different damages, especially mammal damage contributed to the failure of Scots pine spring plantings, whereas in summer plantings, corresponding single failure reason could not be identified. Based on our findings, extending the planting season of Norway spruce could be recommended in both regions. For Scots pine, there is still significant uncertainty about the success of summer and autumn plantings, partially due to the limited number of plantings available for analyses.Picea abiesPinus sylvestris

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Section: Discussionmentioning

confidence: 99%

Comparison of planting success in one-year-old spring, summer and autumn plantings of Norway spruce and Scots pine under boreal conditions

Pikkarainen¹,

Luoranen²,

Kilpeläinen³

et al. 2020

Silva Fenn.

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“…In the more northerly experiments in Finland and Sweden, mainly with Scots and lodgepole pine, the seedlings were probably not protected (Tables 1 and 2). However, in many of the experiments with unprotected seedlings, pine weevil occurrence seemed to be low at the time of planting, and frequencies of both seedling damage and mortality caused by pine weevils are much lower in the northern part of the focal region (Nordlander et al 2011;Johansson et al 2015;Nordlander et al 2017). Thus, the results presented are probably representative of survival rates at sites where pine weevils have moderate influence, and the suggested generalized survival rates and MSP-effects apply to seedlings that are protected against pine weevils or planted at sites with very low (or no) pine weevil populations.…”

Section: Survivalmentioning

confidence: 99%

Influence of mechanical site preparation on regeneration success of planted conifers in clearcuts in Fennoscandia – a review

Sikström¹,

Hjelm²,

Hanssen³

et al. 2020

Silva Fenn.

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In the Nordic countries Finland, Norway and Sweden, the most common regeneration method is planting after clearcutting and, often, mechanical site preparation (MSP). The main focus of this study is to review quantitative effects that have been reported for the five main MSP methods in terms of survival and growth of manually planted coniferous seedlings of Norway spruce ( (L.) Karst.), Scots pine ( L.) and lodgepole pine ( var. Engelm.) in clearcuts in these three countries. Meta analyses are used to compare the effects of MSP methods to control areas where there was no MSP and identify any relationships with temperature sum and number of years after planting. In addition, the area of disturbed soil surface and the emergence of naturally regenerated seedlings are evaluated. The MSP methods considered are patch scarification, disc trenching, mounding, soil inversion and ploughing. Studies performed at sites with predominately mineral soils (with an organic topsoil no thicker than 0.30 m), in boreal, nemo-boreal and nemoral vegetation zones in the three Fenno-Scandinavian countries are included in the review. Data from 26 experimental and five survey studies in total were compiled and evaluated. The results show that survival rates of planted conifers at sites where seedlings are not strongly affected by pine weevil ( L.) are generally 80â90% after MSP, and 15â20 percent units higher than after planting in non-prepared sites. The experimental data indicated that soil inversion and potentially ploughing (few studies) give marginally greater rates than the other methods in this respect. The effects of MSP on survival seem to be independent of the temperature sum. Below 800 degree days, however, the reported survival rates are more variable. MSP generally results in trees 10â25% taller 10â15 years after planting compared to no MSP. The strength of the growth effect appears to be inversely related to the temperature sum. The compiled data may assist in the design, evaluation and comparison of possible regeneration chains, i.e. analyses of the efficiency and cost-effectiveness of multiple combinations of reforestation measures.Picea abiesPinus sylvestrisPinus contortalatifoliaHylobius abietis

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“…Another threat for current forests is global climate change which changes the abiotic growing conditions for local tree species and promotes spreading of introduced pests and pathogens (Couture and Lindroth 2012;Seidl et al 2018). This could be an addition to the increased biotic stress from native pest species Nordlander et al 2017) on forest trees in changed environmental conditions. BVOCs of forest trees are highly responsive to the abiotic (Peñuelas and Staudt 2010;Kivimäenpää et al 2013) and biotic Ghimire et al 2017) stresses related to climate change.…”

Section: Climate Change Bvocs and Future Forestsmentioning

confidence: 99%

Unravelling the functions of biogenic volatiles in boreal and temperate forest ecosystems

et al. 2019

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Living trees are the main source of biogenic volatile organic compounds (BVOCs) in forest ecosystems, but substantial emissions originate from leaf and wood litter, the rhizosphere and from microorganisms. This review focuses on temperate and boreal forest ecosystems and the roles of BVOCs in ecosystem function, from the leaf to the forest canopy and from the forest soil to the atmosphere level. Moreover, emphasis is given to the question of how BVOCs will help forests adapt to environmental stress, particularly biotic stress related to climate change. Trees use their vascular system and emissions of BVOCs in internal communication, but emitted BVOCs have extended the communication to tree population and whole community levels and beyond. Future forestry practices should consider the importance of BVOCs in attraction and repulsion of attacking bark beetles, but also take an advantage of herbivore-induced BVOCs to improve the efficiency of natural enemies of herbivores. BVOCs are extensively involved in ecosystem services provided by forests including the positive effects on human health. BVOCs have a key role in ozone formation but also in ozone quenching. Oxidation products form secondary organic aerosols that disperse sunlight deeper into the forest canopy, and affect cloud formation and ultimately the climate. We also discuss the technical side of reliable BVOC sampling of forest trees for future interdisciplinary studies that should bridge the gaps between the forest sciences, health sciences, chemical ecology, conservation biology, tree physiology and atmospheric science.

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Influence of climate and forest management on damage risk by the pine weevil Hylobius abietis in northern Sweden

Cited by 20 publications

References 57 publications

Comparison of planting success in one-year-old spring, summer and autumn plantings of Norway spruce and Scots pine under boreal conditions

Comparison of planting success in one-year-old spring, summer and autumn plantings of Norway spruce and Scots pine under boreal conditions

Influence of mechanical site preparation on regeneration success of planted conifers in clearcuts in Fennoscandia – a review

Unravelling the functions of biogenic volatiles in boreal and temperate forest ecosystems

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