Category :
Article
article id 5519,
category
Article
Jyrki Kangas,
Jari Karsikko,
Laura Laasonen,
Timo Pukkala.
(1993).
A method for estimating the suitability function of wildlife habitat for forest planning on the basis of expertise.
Silva Fennica
vol.
27
no.
4
article id 5519.
https://doi.org/10.14214/sf.a15680
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In the method presented in this study, a group of experts evaluate, in a pairwise manner, a set of forest areas with respect to the game species considered. On the basis of these comparisons, relative priorities of forest areas are estimated using the eigenvalue technique. Using regression analysis, a habitat suitability function is estimated in which the priority is predicted by measures already familiar in forest planning. As a case study, a habitat suitability function was estimated for black grouse (Tetrao tetrix, Lururus tetrix L.). The function is applicable in forestry planning carried out using modern planning techniques.
The PDF includes an abstract in Finnish.
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Kangas,
E-mail:
jk@mm.unknown
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Karsikko,
E-mail:
jk@mm.unknown
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Laasonen,
E-mail:
ll@mm.unknown
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Pukkala,
E-mail:
tp@mm.unknown
article id 4539,
category
Article
English title:
Wildlife management.
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Silva Fennica issue 46 includes presentations held in professional development courses, arranged for foresters working in public administration in 1937. The presentations focus on practical issues in forest management and administration, especially in regional level. The education was arranged by Forest Service.
This presentation describes administration and state of wildlife management in the state forests of Finland.
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Klemola,
E-mail:
vk@mm.unknown
Category :
Research article
article id 25022,
category
Research article
Reetta Kangaslampi,
Olli-Pekka Tikkanen.
(2026).
Training and utilizing scent detection dogs in the identification of the European spruce bark beetle Ips typographus.
Silva Fennica
vol.
60
no.
1
article id 25022.
https://doi.org/10.14214/sf.25022
Highlights:
Scent detection dogs can identify a small sample of live European spruce bark beetles with a 98% sensitivity in the laboratory; Training a scent detection dog to detect bark beetles is relatively time-efficient; Early intervention strategies may benefit from inclusion of scent detection dogs in the management process.
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The European spruce bark beetle (Ips typographus L.) thrives in weakened mature spruce (Picea abies (L.) H. Karst.) stands, causing massive destruction and becoming more abundant in Europe since the late 2010s. Early identification of new outbreaks is essential to ensure timely logging of infested trees to control the bark beetle population. Scent detection dogs (Canis lupus familiaris L.) are being used to identify illegal substances, diseases, and animal scat. In this study, the use of scent detection dogs in the identification of the European spruce bark beetle was tested. The main objective was to examine whether a dog could be trained to reliably identify the scent of a small group of live bark beetles. In this study we carried out comprehensive testing of the accuracy of the method in the laboratory and performed a small-scale functionality study in a field setting. The study was conducted by training two scent detection dogs to identify live bark beetles from empty samples and interference samples. This study differs from previous publications regarding spruce bark beetle detection, as our dogs were trained on live beetles. We concluded that, after a relatively short training period (23 days within eight weeks), scent detection dogs can identify a small sample of live European spruce bark beetles with a 98% sensitivity in the laboratory. The sensitivity was remarkably high and gave positive indications of the method’s functionality and usability in the future also in field conditions. The use of a scent detection dog can be a welcome and effective way to identify bark beetle damage.
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Kangaslampi,
University of Eastern Finland; Faculty of Science, Forestry and Technology; P.O. Box 111, FI-80101 Joensuu, Finland
https://orcid.org/0009-0001-2965-3369
E-mail:
reetta.kangaslampi@uef.fi
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Tikkanen,
University of Eastern Finland; Faculty of Science, Forestry and Technology; P.O. Box 111, FI-80101 Joensuu, Finland
https://orcid.org/0000-0002-3875-2772
E-mail:
olli-pekka.tikkanen@uef.fi
article id 182,
category
Research article
Janne Miettinen,
Pekka Helle,
Ari Nikula,
Pekka Niemelä.
(2009).
Changes in landscape-scale habitat selection of capercaillie (Tetrao urogallus) in managed north-boreal forest.
Silva Fennica
vol.
43
no.
4
article id 182.
https://doi.org/10.14214/sf.182
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We studied changes in habitat selection of capercaillie in northern Finnish boreal forests at two spatial scales during two time periods, 1989–1992 and 2000–2003. We studied capercaillie densities and their changes between the study periods in relation to the landscape class proportions within 3-km buffer zones around the wildlife triangle center points. Furthermore, we compared the landscape class proportions in 800-meter buffer zones around capercaillie wildlife triangle count observations and around the counted wildlife triangle transects using t-tests and compositional analysis. At the local population scale (3 km) the change in adult density between the study periods was associated positively with the proportion of young thinning stands in 2003 and reversely with the mature stand (1992 and 2003) and clear-cut (1992) proportions. Capercaillie juvenile and pooled densities during 2000–2003 were positively associated with the advanced thinning stand proportion in 2003. At the capercaillie home range scale (800 m) habitats were rich in mature stands during 1989–1992 in relation to available habitats, but not during 2000–2003 when young thinning stands were more abundant in relation to available habitats. Relatively young managed forests can be suitable for capercaillie, but mature managed forests as capercaillie habitats may have deteriorated between the study periods. Spatial planning may help to form suitable areas that are large enough for the species, but the highest potential may lay in the forest stand scale, where increased cover on the ground could promote the habitat quality.
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Miettinen,
Kankurinhaka 14, FI-90450 Kempele, Finland
E-mail:
janne.miettinen@rktl.fi
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Helle,
Finnish Game and Fisheries Research Institute, Tutkijantie 2 E, FI-90570 Oulu, Finland
E-mail:
ph@nn.fi
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Nikula,
Finnish Forest Research Institute, Rovaniemi Research Unit, Eteläranta 55, FI-99600 Rovaniemi, Finland
E-mail:
an@nn.fi
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Niemelä,
University of Turku, Department of Biology, FI-20014 University of Turku, Finland
E-mail:
pn@nn.fi
article id 578,
category
Research article
Kevin Boston,
Pete Bettinger.
(2001).
Development of spatially feasible forest plans: a comparison of two modeling approaches.
Silva Fennica
vol.
35
no.
4
article id 578.
https://doi.org/10.14214/sf.578
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Spatial goals are becoming more frequent aspects of forest management plans as regulatory and organizational policies change in response to fisheries and wildlife concerns. The combination of green-up constraints (harvesting restrictions that prevent the cutting of adjacent units for a specified period of time) and habitat requirements for red-cockaded woodpeckers (RCW) in the southeastern U.S. suggests that spatially feasible forest plans be developed to guide management activities. We examined two modeling approaches aimed at developing management plans that had both harvest volume goals, RCW habitat, and green-up constraints. The first was a two-stage method that in one stage used linear programming to assign volume goals, and in a second stage used a tabu search – genetic algorithm heuristic technique to minimize the deviations from the volume goals while maximizing the present net revenue and addressing the RCW and green-up constraints. The second approach was a one-stage procedure where the entire management plan was developed with the tabu search – genetic algorithm heuristic technique, thus it did not use the guidance for timber volume levels provided by the LP solution. The goal was to test two modeling approaches to solving a realistic spatial harvest scheduling problem. One is where to volume goals are calculated prior to developing the spatially feasible forest plan, while the other approach simultaneously addresses the volume goals while developing the spatially feasible forest plan. The resulting forest plan from the two-stage approach was superior to that produced from the one-stage approach in terms of net present value. The main point from this analysis is that heuristic techniques may benefit from guidance provided by relaxed LP solutions in their effort to develop efficient forest management plans, particularly when both commodity production and complex spatial wildlife habitat goals are considered. Differences in the production of forest products were apparent between the two modeling approaches, which could have a significant effect on the selection of wood processing equipment and facilities.
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Boston,
Forest Fibre Solutions, Carter Holt Harvey, Tokoroa, New Zealand
E-mail:
kevin.boston@chh.co.nz
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Bettinger,
Department of Forest Resources, Oregon State University, Corvallis, OR 97331
E-mail:
pb@nn.us
Category :
Review article
article id 24021,
category
Review article
Highlights:
The extensive network of forest roads in Sweden facilitates both forestry transportation and other activities including recreation, berry-picking, hunting, tourism, and firefighting; The multiple uses of roads can lead to conflicts when the interests between stakeholders and forest owners collide; Despite its extent, research into the social, ecological, and environmental consequences of Sweden’s forest road network is limited.
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Since the 1950s, more than 200 000 km of roads have been built in Sweden’s forests, making them easily accessible and open to multiple uses. The aim of this study was to review the impacts of forest roads in Sweden from a broad perspective encompassing social, ecological, and environmental factors. The Swedish case is interesting because it has an extensive network of permanent forest roads which were built primarily for forestry-related transportation but are currently used by many other stakeholders for many different purposes. Forest roads not only facilitate transportation of wood, machinery, personnel, and equipment into and out of the forest but also enable emergency response to wildfires and support berry and mushroom picking, hunting, recreation, tourism, and access to second homes. The roads increase the opportunities for members of the public to experience forests in various ways. Conflicts arise when different interests collide, for example when the interests of the forest owner clash with those of commercial berry-picking companies, tourism entrepreneurs, or reindeer (Rangifer tarandus L.) herding. Forest roads may have ecological impacts such as barrier and disturbance effects, fragmentation or loss of habitats, altering fauna movement patterns, and changing the composition of plant and insect species. The environmental impacts of forest roads relate to, among other things, hydrology, water quality, and erosion. Predicted changes in the climate are likely to place new demands on Swedish forest roads but, despite their extent, this review shows that there is only a small amount of rather fragmented research on their social, ecological, and environmental consequences. Overall, few studies appear to cover both social and ecological/environmental factors and their interactions, either in Sweden or elsewhere. This review provides examples of such interactions in the case of Sweden, and suggests that more research into these and the specific social, ecological, and environmental factors involved is warranted.
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Ring,
Skogforsk (The Forestry Research Institute of Sweden), Uppsala Science Park, 751 83 Uppsala, Sweden
https://orcid.org/0000-0002-8962-9811
E-mail:
eva.ring@skogforsk.se
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Wallgren,
Skogforsk (The Forestry Research Institute of Sweden), Uppsala Science Park, 751 83 Uppsala, Sweden; Swedish University of Agricultural Sciences, Department of Wildlife, Fish, and Environmental Studies, 907 36 Umeå, Sweden
https://orcid.org/0000-0002-3172-4496
E-mail:
martha.wallgren@skogforsk.se
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Mårald,
Umeå University, Department of Historical. Philosophical and Religious Studies, 901 87 Umeå, Sweden
https://orcid.org/0000-0002-2291-9910
E-mail:
erland.marald@umu.se
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Westerfelt,
Skogforsk (The Forestry Research Institute of Sweden), Uppsala Science Park, 751 83 Uppsala, Sweden
https://orcid.org/0000-0003-2040-8305
E-mail:
per.westerfelt@skogforsk.se
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Djupström,
Skogforsk (The Forestry Research Institute of Sweden), Uppsala Science Park, 751 83 Uppsala, Sweden; Swedish University of Agricultural Sciences, Department of Wildlife, Fish, and Environmental Studies, 907 36 Umeå, Sweden
https://orcid.org/0000-0003-4536-7765
E-mail:
line.djupstrom@skogforsk.se
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Davidsson,
Skogforsk (The Forestry Research Institute of Sweden), Uppsala Science Park, 751 83 Uppsala, Sweden
https://orcid.org/0009-0007-2736-8656
E-mail:
Aron.davidsson@skogforsk.se
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Sonesson,
Skogforsk (The Forestry Research Institute of Sweden), Uppsala Science Park, 751 83 Uppsala, Sweden
https://orcid.org/0000-0002-2018-7496
E-mail:
Johan.sonesson@skogforsk.se
Category :
Research note
article id 269,
category
Research note
Christian Kiffner,
Elisabeth Rössiger,
Oliver Trisl,
Rainer Schulz,
Ferdinand Rühe.
(2008).
Probability of recent bark stripping damage by red deer (Cervus elaphus) on Norway spruce (Picea abies) in a low mountain range in Germany – a preliminary analysis.
Silva Fennica
vol.
42
no.
1
article id 269.
https://doi.org/10.14214/sf.269
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Red deer (Cervus elaphus) can cause considerable damage to forest stands by bark stripping. Here, we examined the probability of bark stripping of susceptible Norway spruce (Picea abies) during winter in relation to local environmental characteristics in the western Harz Mountains, Lower Saxony, Germany. We present the results of a multiple logistic regression model for recent bark stripping damage by red deer which we developed from two systematic cluster sampling inventories after two winter periods along with associated meteorological data and records of bagged deer. Our model suggests that the risk of bark stripping increased significantly (P 0.05) with rising slope angle, cumulating snow depth and increasing index values of red deer population density. Spruces growing in closed forest stands were debarked at a higher probability than spruces located close to forest edges. Further on, spruce stands on eastern slopes had a lower probability of bark damage than spruce stands on northern slopes. Other tested variables (altitude, length of daily solar irradiation, duration of snow cover, age of spruce stand within the age range of 16–50 years) had no significant effect on the probability of new bark stripping. We conclude that red deer in the western Harz Mountains seem to use bark as food resource at preferred locations and in times of low food availability. To improve fit and predictive power of bark stripping models we recommend including stand characteristics. We propose to reduce the population size of red deer in order to diminish bark stripping damages to an economically acceptable level.
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Kiffner,
University Göttingen, Büsgen-Institute, Department of Forest Zoology and Forest Protection incl. Wildlife Biology and Game Management, Büsgenweg 3, 37077 Göttingen, Germany
E-mail:
ckiffne@gwdg.de
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Rössiger,
University Göttingen, Büsgen-Institute, Department of Forest Zoology and Forest Protection incl. Wildlife Biology and Game Management, Büsgenweg 3, 37077 Göttingen, Germany
E-mail:
er@nn.de
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Trisl,
Planungsbüro Trisl, In der Schleene 7, 36037 Waake, Germany
E-mail:
ot@nn.de
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Schulz,
University Göttingen, Büsgen-Institute, Department of Ecological Informatics, Biometry and Forest Growth, Büsgenweg 4, 37077 Göttingen, Germany
E-mail:
rs@nn.de
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Rühe,
University Göttingen, Büsgen-Institute, Department of Forest Zoology and Forest Protection incl. Wildlife Biology and Game Management, Büsgenweg 3, 37077 Göttingen, Germany
E-mail:
fr@nn.de