Category :
Research article
article id 23045,
category
Research article
Laura Pikkarainen,
Harri Strandman,
Eerik Vento,
Aaron Petty,
Olli-Pekka Tikkanen,
Antti Kilpeläinen,
Heli Peltola.
(2024).
Effects of forest conservation and management on timber, ecosystem carbon, dead wood and habitat suitability area in a boreal forest under climate change.
Silva Fennica
vol.
58
no.
2
article id 23045.
https://doi.org/10.14214/sf.23045
Highlights:
Increasing forest conservation areas increased all other ecosystem services except timber yield. Intensive forest management enhanced this increase; Increased conservation area decreased timber yield, but intensive forest management reduced this effect and even overcompensated it at the end of simulation period in the 10% conservation scenario with intensified forest management; Climate change increased all other ecosystem services, except carbon stocks.
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We used forest ecosystem model simulations to study how forest conservation and management intensity affected timber yield, ecosystem carbon stocks, amount of dead wood, and habitat suitability area in a middle boreal forest region of Finland under changing climate over a 90-year simulation period. We used the following forest conservation and management scenarios: baseline forest management (BM), BM with 10 or 20% increase of conservation area with or without intensified forest management (i.e. improved forest regeneration material and forest fertilization). The simulations were done under current climate (reference period of 1981–2010), and Representative Concentration Pathway (RCP) climate change projections under the RCP2.6 and RCP4.5 forcing scenarios. Overall, increasing the forest conservation area decreased timber yield and increased the ecosystem carbon stock, the amount of dead wood and consequently the area of suitable habitat for saproxylic species. The use of intensified forest management reduced the loss of timber yield, increased ecosystem carbon stock, the amount of dead wood and area of suitable habitat for saproxylic species. At the end of simulation period, the use of intensified forest management even overcompensated (4–6% higher) the timber loss from 10% increase of conservation area. Under changing climate, timber yield, the amount of dead wood and the area of suitable habitats for saproxylic species increased. To conclude, with intensified forest management it is possible, in the short term, to decrease the loss of timber yield through increased forest conservation area and in the long term maintain or even increase it compared to baseline forest management.
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Pikkarainen,
School of Forest Sciences, University of Eastern Finland, Yliopistokatu 7, FI-80100 Joensuu, Finland
https://orcid.org/0000-0001-5301-3639
E-mail:
laura.pikkarainen@uef.fi
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Strandman,
School of Forest Sciences, University of Eastern Finland, Yliopistokatu 7, FI-80100 Joensuu, Finland
https://orcid.org/0000-0002-9400-6424
E-mail:
harri.strandman@uef.fi
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Vento,
School of Forest Sciences, University of Eastern Finland, Yliopistokatu 7, FI-80100 Joensuu, Finland
E-mail:
eerik.vento@gmail.com
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Petty,
School of Forest Sciences, University of Eastern Finland, Yliopistokatu 7, FI-80100 Joensuu, Finland
https://orcid.org/0009-0006-6595-1386
E-mail:
aaron.petty@uef.fi
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Tikkanen,
School of Forest Sciences, University of Eastern Finland, Yliopistokatu 7, FI-80100 Joensuu, Finland
https://orcid.org/0000-0002-3875-2772
E-mail:
olli-pekka.tikkanen@uef.fi
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Kilpeläinen,
School of Forest Sciences, University of Eastern Finland, Yliopistokatu 7, FI-80100 Joensuu, Finland
https://orcid.org/0000-0003-4299-0578
E-mail:
antti.kilpelainen@uef.fi
-
Peltola,
School of Forest Sciences, University of Eastern Finland, Yliopistokatu 7, FI-80100 Joensuu, Finland
E-mail:
heli.peltola@uef.fi
article id 10010,
category
Research article
Highlights:
We constructed a full dead wood profile of a semi-natural boreal forest; Abundance-diameter distributions were different among tree species; Extensive sampling is needed if focus on large dead wood and rare tree species.
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Dead wood profile of a forest is a useful tool for describing forest characteristics and assessing forest disturbance history. Nevertheless, there are few studies on dead wood profiles, including both coarse and fine dead wood, and on the effect of sampling intensity on the dead wood estimates. In a semi-natural boreal forest, we measured every dead wood item over 2 cm in diameter from 80 study plots. From eight plots, we further recorded dead wood items below 2 cm in diameter. Based on these data we constructed the full dead wood profile, i.e. the overall number of dead wood items and their distribution among different tree species, volumes of different size and decay stage categories. We discovered that while the number of small dead wood items was immense, their number dropped drastically from the diameter below 1 cm to diameters 2–3 cm. Different tree species had notably different abundance-diameter distribution patterns: spruce dead wood comprised most strikingly the smallest diameter fractions, whereas aspen dead wood comprised a larger share of large-diameter items. Most of the dead wood volume constituted of large pieces (>10 cm in diameter), and 62% of volume was birch. The variation in the dead wood estimates was small for the numerically dominant tree species and smallest diameter categories, but high for the sub-dominant tree species and larger size categories. In conclusion, the more the focus is on rare tree species and large dead wood items, the more comprehensive should the sampling be.
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Halme,
Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä, Finland; School of Resource Wisdom, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä, Finland
E-mail:
panu.halme@jyu.fi
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Purhonen,
Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä, Finland
E-mail:
jenna.e.i.purhonen@jyu.fi
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Marjakangas,
Centre for Biodiversity Dynamics, Department of Biology, Norwegian University of Science and Technology, N-7491 Trondheim, Norway
E-mail:
emma-liina.marjakangas@ntnu.no
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Komonen,
Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä, Finland; School of Resource Wisdom, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä, Finland
E-mail:
atte.komonen@jyu.fi
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Juutilainen,
Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FI-40014 University of Jyväskylä, Finland
E-mail:
kjuutilainen@yahoo.com
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Abrego,
Department of Agricultural Sciences, University of Helsinki, P.O. Box 27, FI-00014 University of Helsinki, Finland
E-mail:
nerea.abrego@helsinki.fi
article id 85,
category
Research article
Ville A.O. Selonen,
Maija Mussaari,
Tero Toivanen,
Janne S. Kotiaho.
(2011).
The conservation potential of brook-side key habitats in managed boreal forests.
Silva Fennica
vol.
45
no.
5
article id 85.
https://doi.org/10.14214/sf.85
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Today, maintaining biodiversity is included in the targets of boreal forest management. A widespread approach in northern Europe is to identify and preserve woodland key habitats within managed forests. Woodland key habitats are expected to be patches that host populations of threatened and declining species, and the preservation of these patches is assumed to enable the persistence of the focal species in the landscape. In Finland, the criteria for selecting woodland key habitats are defined in the Finnish Forest Act, and the selection has been done by forest practitioners. Our objective was to determine whether the surroundings of boreal brooks and rivulets qualified as key habitats are truly different from brook-side habitats not granted the key habitat status, and whether the brook-side habitats of the two types differ from the forest matrix managed for timber production. We found that the two brook-side habitats were in most aspects rather alike but there was a difference in the composition of ground vegetation assemblages. In contrast, the control forests were distinct from the brook-sides in terms of dead wood, species richness and assemblages of polypores, species richness of epiphytic mosses, and the composition of beetle assemblages. We conclude that brook-sides in general provide an important habitat clearly diverging from the surrounding matrix but that the conservation value of the brook-sides granted the key habitat status may not be substantially larger than that of the brook-sides without the status.
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Selonen,
University of Jyväskylä, Department of Biological and Environmental Sciences, Lahti, Finland
E-mail:
ville.selonen@juy.fi
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Mussaari,
University of Jyväskylä, Department of Biological and Environmental Sciences, Lahti, Finland
E-mail:
mm@nn.fi
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Toivanen,
University of Jyväskylä, Department of Biological and Environmental Sciences, Lahti, Finland
E-mail:
tt@nn.fi
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Kotiaho,
University of Jyväskylä, Department of Biological and Environmental Sciences, Lahti, Finland
E-mail:
jsk@nn.fi
article id 78,
category
Research article
Kris Vandekerkhove,
Luc De Keersmaeker,
Ruben Walleyn,
Frank Köhler,
Luc Crevecoeur,
Leen Govaere,
Arno Thomaes,
Kris Verheyen.
(2011).
Reappearance of old-growth elements in lowland woodlands in northern Belgium: Do the associated species follow?
Silva Fennica
vol.
45
no.
5
article id 78.
https://doi.org/10.14214/sf.78
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The forest cover of the western European lowland plain has been very low for centuries. Remaining forests were intensively managed, and old-growth elements like veteran trees and coarse woody debris became virtually absent. Only over the last decades have these old-growth elements progressively redeveloped in parks, lanes and forests, and have now reached their highest level over the last 500–1000 years. Biodiversity associated with these old-growth elements makes up an important part of overall forest biodiversity. The ability of species to recolonise the newly available habitat is strongly determined by limitations in their dispersal and establishment. We analyse the current status and development of old-growth elements in Flanders (northern Belgium) and the process of recolonisation by means of specific cases, focussing on saproxylic fungi and saproxylic beetles. Our results show that ‘hotspots’ of secondary old growth, even isolated small patches, may have more potential for specialised biodiversity than expected, and may provide important new strongholds for recovery and recolonisation of an important share of old-growth related species.
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Vandekerkhove,
INBO, Gaverstraat 4, B-9500 Geraardsbergen, Belgium
E-mail:
kris.vandekerkhove@inbo.be
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De Keersmaeker,
INBO, Gaverstraat 4, B-9500 Geraardsbergen, Belgium
E-mail:
ldk@nn.be
-
Walleyn,
INBO, Gaverstraat 4, B-9500 Geraardsbergen, Belgium
E-mail:
rw@nn.be
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Köhler,
Koleopterologisches Forschungsbüro, Bornheim, Germany
E-mail:
fk@nn.de
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Crevecoeur,
Genk, Belgium
E-mail:
lc@nn.be
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Govaere,
Agency of Nature and Forests, Brussels, Belgium
E-mail:
lg@nn.be
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Thomaes,
INBO, Gaverstraat 4, B-9500 Geraardsbergen, Belgium
E-mail:
at@nn.be
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Verheyen,
Ghent University, Laboratory of Forestry, Gontrode, Belgium
E-mail:
kv@nn.be
Category :
Review article
article id 390,
category
Review article
Bengt Gunnar Jonsson,
Nicholas Kruys,
Thomas Ranius.
(2005).
Ecology of species living on dead wood – lessons for dead wood management.
Silva Fennica
vol.
39
no.
2
article id 390.
https://doi.org/10.14214/sf.390
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Dead wood has been identified as a crucial component for forest biodiversity. Recent research has improved our understanding of habitat relations for many species associated with dead wood. However, the consequences for forest management are yet to be explored. In this review we build upon the growing volume of studies on dead wood dependent species, the dynamics of dead wood and ecological theory in order to identify the challenges for forest management at the landscape level. The review has a Fennoscandian focus, but the problems and challenges are similar in many forest ecosystems. We argue that it is necessary to 1) counteract the current shortage in availability of dead wood, 2) concentrate planning at the landscape level in order to minimize isolation and reduce edge effects, 3) create a variety of dead wood types, and 4) utilise available quantitative analytical tools. This calls for new approaches to management that to a large extent includes available knowledge, and to find platforms for planning forested landscapes with diverse holdings.
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Jonsson,
Mid Sweden University, Dept of Natural Sciences, SE-851 70 Sundsvall, Sweden
E-mail:
bengt-gunnar.jonsson@miun.se
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Kruys,
SLU, Dept of Forest Resource Management and Geomatics, SE-901 83 Umeå, Sweden
E-mail:
nk@nn.se
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Ranius,
SLU, Dept of Entomology, SE-750 07 Uppsala, Sweden
E-mail:
tr@nn.se