scholarly journals Logging residues and ground vegetation in nutrient dynamics of a clear-cut boreal forest

2005 ◽  
Vol 2005 (12) ◽  
Author(s):  
Marjo Palviainen
Keyword(s):  
Boreal Forest ◽  
Nutrient Dynamics ◽  
Ground Vegetation ◽  
Clear Cut ◽  
Logging Residues

Development of ground vegetation biomass and nutrient pools in a clear-cut disc-plowed boreal forest

2007 ◽  
Vol 297 (1-2) ◽  
pp. 43-52 ◽  
Author(s):  
Marjo Palviainen ◽  
Leena Finér ◽  
Ari Laurén ◽  
Hannu Mannerkoski ◽  
Sirpa Piirainen ◽  
...  
Keyword(s):  
Boreal Forest ◽  
Ground Vegetation ◽  
Nutrient Pools ◽  
Vegetation Biomass ◽  
Clear Cut

Multi-objective forestry increases the production of ecosystem services

2020 ◽  
Author(s):  
Olalla Díaz-Yáñez ◽  
Timo Pukkala ◽  
Petteri Packalen ◽  
Manfred J Lexer ◽  
Heli Peltola
Keyword(s):  
Ecosystem Services ◽  
Boreal Forest ◽  
Boreal Forests ◽  
Carbon Balance ◽  
Net Present Value ◽  
Simulation And Optimization ◽  
Multi Objective ◽  
Clear Cut ◽  
Trade Offs ◽  
Continuous Cover Forestry

Abstract Boreal forests produce multiple ecosystem services for the society. Their trade-offs determine whether they should be produced simultaneously or whether it is preferable to assign separate areas to different ecosystem services. We use simulation and optimization to analyse the correlations, trade-offs and production levels of several ecosystem services in single- and multi-objective forestry over 100 years in a boreal forest landscape. The case study area covers 3600 ha of boreal forest, consisting of 3365 stands. The ecosystem services and their indicators (in parentheses) considered are carbon sequestration (forestry carbon balance), biodiversity (amount of deadwood and broadleaf volume), economic profitability of forestry (net present value of timber production) and timber supply to forest industry (volume of harvested timber). The treatment alternatives simulated for each of the stands include both even-aged rotation forestry (thinning from above with clear cut) and continuous cover forestry regimes (thinning from above with no clear cut). First, we develop 200 Pareto optimal plans by maximizing multi-attribute utility functions using random weights for the ecosystem service indicators. Second, we compare the average level of ecosystem services in single- and multi-objective forestry. Based on our findings, forestry carbon balance and the amount of deadwood correlate positively with each other, and both of them correlate negatively with harvested timber volume and economic profitability of forestry. Despite this, the simultaneous maximization of multiple objectives increased the overall production levels of several ecosystem services, which suggests that the management of boreal forests should be multi-objective to sustain the simultaneous provision of timber and other ecosystem services.

Forest floor microarthropod abundance and oribatid mite (Acari: Oribatida) composition following partial and clear-cut harvesting in the mixedwood boreal forest

2004 ◽  
Vol 34 (5) ◽  
pp. 998-1006 ◽  
Author(s):  
Zoë Lindo ◽  
Suzanne Visser
Keyword(s):  
Boreal Forest ◽  
Community Composition ◽  
Relative Abundance ◽  
Forest Floor ◽  
Oribatid Mite ◽  
Diversity Indices ◽  
Mite Species ◽  
Oribatid Mites ◽  
Clear Cut ◽  
Mixedwood Boreal Forest

The effects of partial and clear-cut harvesting on abundance and community composition of forest floor microarthropods and oribatid mites were investigated in conifer and deciduous stands of the mixedwood boreal forest. Soil samples from clearcuts, strip-cut corridors in a partial cut, green-tree retention patches in a partial cut, and uncut control sites were collected 2.5 years after harvest and microarthropods were extracted, enumerated, and identified. Densities of microarthropod suborders were lower in the strip-cut corridors of the deciduous stands and significantly lower in the suborder Oribatida (oribatid mites). Changes in microarthropod community composition, decreased relative abundance of prostigmatid mites, and increased relative abundance of mesostigmatid mites were observed in corridor and clear-cut treatments. Lowered abundances and changes in community composition are likely due to compaction of the forest floor during harvesting. Selected oribatid mite species showed significantly lower abundances in clearcuts than in uncut sites, but diversity indices for oribatid mites were generally not significantly different between uncut sites and clearcuts. Changes in oribatid mite communities following harvesting were thus more quantitative (absolute abundance) than qualitative (diversity, composition), and as a result, use of oribatid mites as biological indicators of disturbance is limited because of the lack of changes in species composition.

scholarly journals Photosynthesis of boreal ground vegetation after a forest clear-cut

2009 ◽  
Vol 6 (11) ◽  
pp. 2495-2507 ◽  
Author(s):  
L. Kulmala ◽  
J. Pumpanen ◽  
T. Vesala ◽  
P. Hari
Keyword(s):  
Photosynthetic Activity ◽  
Calluna Vulgaris ◽  
Ground Level ◽  
Growing Season ◽  
Plant Size ◽  
Rubus Idaeus ◽  
Temperature History ◽  
Ground Vegetation ◽  
Clear Cut ◽  
Species Specific

Abstract. Heather (Calluna vulgaris), rosebay willowherb (Epilobium angustifolium), wavy hair-grass (Deschampsia flexuosa) and raspberry (Rubus idaeus) are typical species at boreal clear-cut sites. In this study, we measured their photosynthesis separately in the growing season of 2005 using a manual chamber. All measured species showed clear and species-specific seasonal cycles of photosynthetic activity (Pmax). The maxima of C. vulgaris and E. angustifolium occurred around June and July, while that of R. idaeus occurred as late as August. A simple model of photosynthetic activity is presented, addressing the photosynthesis of C. vulgaris was mainly explained by temperature history when the soil moisture is high. The activity of deciduous D. flexuosa also followed the temperature history, unlike the activities of E. angustifolium and R. idaeus. During a short drought, some shoots decreased their Pmax levels but none of the species showed similar reactions between individuals. We also observed that the comparison of the whole-plant Pmax or respiration of different-sized individuals were less scattered than the results based on full-grown leaf mass, implying that species-specific rates of photosynthesis at ground level are rather similar regardless of the plant size. Using species composition and continuous temperature and light measurements, we upscaled the species-specific process rates and integrated fixed and respired CO2 of ground vegetation for the entire 2005 growing season. The photosynthetic production per surface area of soil was 760 g C m−2 y−1 at the fertile site and 300 g C m−2 y−1 at the infertile site. During the snow-free period (18 April–21 November), the above ground parts of measured species released 75 g C m−2 y−1 at the infertile site. At the fertile site, E. angustifolium and R. idaeus respired 22 and 12 g C m−2 y−1, respectively.

The effects of fire and stand age on seedling establishment of Pulsatilla patens in a pine-dominated boreal forest

2005 ◽  
Vol 83 (6) ◽  
pp. 688-693 ◽  
Author(s):  
Rein Kalamees ◽  
Kersti Püssa ◽  
Ilkka Vanha-Majamaa ◽  
Kristjan Zobel
Keyword(s):  
Boreal Forest ◽  
Stand Age ◽  
Light Conditions ◽  
Clear Cut ◽  
Forest Sites ◽  
Tree Layer ◽  
Negative Effect ◽  
Scots Pine Forest ◽  
Pulsatilla Patens ◽  
Successional Age

Successful management of disturbance-related endangered plant species requires thorough knowledge concerning their recruitment ecology. Pulsatilla patens (L.) Mill. is found in northern European forests that in the past have been subjected to a periodic wildfire regime and, thus, is supposedly adapted to corresponding changes in forest light conditions and thickness of the moss and litter layers. We tested whether this is true in a field experiment where seeds of P. patens were sown in experimentally burned and control boreal Scots pine forest sites of different successional age (clear-cut, 30 years old, 45 years old). The germination and early establishment of P. patens was enhanced in the experimentally burned conditions and was more successful in younger successional stages. On the other hand, in sites with a tree layer, the germination of P. patens was better in relatively darker areas, suggesting that the negative effect of successional age is probably not a result of changing light conditions, but rather a result of thicker moss and litter layers in the later successional stages.Key words: boreal forest, germination, forest fire, litter layer, Pulsatilla patens, seed sowing.

Clear-cut Detection in Boreal Forest Aided by Remote Sensing

2003 ◽  
Vol 18 (6) ◽  
pp. 537-546 ◽  
Author(s):  
Timo Saksa ◽  
Janne Uuttera ◽  
Taneli Kolström ◽  
Mikko Lehikoinen ◽  
Anssi Pekkarinen ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Boreal Forest ◽  
Clear Cut ◽  
Cut Detection

Effects of a recent wildfire and clearcuts on ground-dwelling boreal forest spider assemblages

2005 ◽  
Vol 35 (11) ◽  
pp. 2575-2588 ◽  
Author(s):  
Maxim Larrivée ◽  
Lenore Fahrig ◽  
Pierre Drapeau
Keyword(s):  
Boreal Forest ◽  
Black Spruce ◽  
Species Turnover ◽  
Pitfall Traps ◽  
Gamma Diversity ◽  
Clear Cut ◽  
Forestry Practices ◽  
Disturbed Forest ◽  
Catch Rates ◽  
Web Building

Ground-dwelling spider (Araneae) assemblages were compared between recent clearcuts and burned black spruce (Picea mariana (Mill.) BSP) forests. Spiders were sampled using pitfall traps placed in 6 recently burned sites, 6 recently clear-cut sites, and 6 undisturbed sites in eastern Quebec, Canada. A total of 2935 individuals from 95 spider species were identified. Catch rates for hunting spiders were significantly higher in the clear-cut stands than in the burned stands, but between-stand species turnover of hunting spiders was twice as high in the burned stands as in the clear-cut stands. Web-building spiders had similar catch rates in the three stand types, but had the highest species turnover and gamma diversity in the undisturbed sites. Correspondence analysis showed that the composition of the spider assemblages varied among the three types of stands. Spider assemblages found in clearcuts were associated with environmental variables reflecting dry, open, disturbed forest floor, while assemblages found in burned stands were correlated with high percentages of shrub cover and dried moss–lichen substrate and deeper litter. We conclude that ground-living spider assemblages in boreal forest respond very differently to clearcuts and fires and we suggest modifications to present forestry practices to create disturbances that are more similar to wildfires.

Logging-residue extraction does not reduce the diversity of litter-layer saprotrophic fungi in three Swedish coniferous stands after 25 years

2009 ◽  
Vol 39 (9) ◽  
pp. 1737-1748 ◽  
Author(s):  
Johan Allmér ◽  
Jan Stenlid ◽  
Anders Dahlberg
Keyword(s):  
Woody Debris ◽  
Abundant Species ◽  
Litter Layer ◽  
Natural Forests ◽  
Long Term Effects ◽  
Saprotrophic Fungi ◽  
Clear Cut ◽  
Logging Residues ◽  
Logging Residue

Logging residues, consisting of branches and treetops, are increasingly being extracted for biofuel purposes in Fennoscandia, thereby decreasing the availability of fine woody debris (FWD). Little is known about the importance of FWD and litter to fungal diversity, although they constitute the major components of dead organic matter in both managed and natural forests. We investigated the long-term effects of removing logging residue on the saprotrophic fungi community in the litter layer by using an experiment established 25 years ago, comprising stands with and without removal of clear-cut slash. The fungal communities were identified using terminal restriction fragment length polymorphism from standardized baits of wood and needles left in the litter layer for 30 months. A total of 74 fungal taxa were recorded. No differences in species richness or frequency of abundant species were detected between the stands with and without slash removal, suggesting that the extraction of logging residues has a negligible long-term impact on abundant saprotrophic fungi. Twenty-five of the 36 abundant species colonized wood and needles indiscriminately, while 10 species occurred exclusively on wood or needles and only one species mainly on wood. The importance of litter to certain wood-inhabiting fungi may therefore be underrated. The frequent records of Trichaptum abietinum (Dicks.) Ryvarden indicate that wood-inhabiting species may, surprisingly, be found in the litter layer.

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