scholarly journals Assessing Alternative Silvicultural Prescriptions for Mid-Rotation, Unthinned, Spruce-Fir Stands in Maine

Forests ◽  
2017 ◽  
Vol 8 (10) ◽  
pp. 370 ◽  
Author(s):  
Patrick Hiesl ◽  
Mindy Crandall ◽  
Aaron Weiskittel ◽  
Anil Kizha
Keyword(s):  
Silvicultural Prescriptions

scholarly journals Correction to: Silvicultural prescriptions for mixed-species forest stands. A European review and perspective

2021 ◽  
Author(s):  
Hans Pretzsch ◽  
Werner Poschenrieder ◽  
Enno Uhl ◽  
Gediminas Brazaitis ◽  
Ekaterina Makrickiene ◽  
...  
Keyword(s):  
Forest Stands ◽  
Mixed Species ◽  
European Review ◽  
Silvicultural Prescriptions ◽  
Mixed Species Forest

Reduced-impact logging in Indonesian Borneo: some results confirming the need for new silvicultural prescriptions

2003 ◽  
Vol 179 (1-3) ◽  
pp. 415-427 ◽  
Author(s):  
Plinio Sist ◽  
Douglas Sheil ◽  
Kuswata Kartawinata ◽  
Hari Priyadi
Keyword(s):  
Reduced Impact Logging ◽  
Silvicultural Prescriptions

Regeneration Methods for Tropical High-forests

1981 ◽  
Vol 8 (2) ◽  
pp. 139-147
Author(s):  
Philip R. O. Kio
Keyword(s):  
Basal Area ◽  
Sampling Technique ◽  
Forest Types ◽  
Ecological Processes ◽  
Growth And Survival ◽  
Silvicultural Treatments ◽  
Living Space ◽  
Large Trees ◽  
The Difference ◽  
Silvicultural Prescriptions

Changes taking place in the natural tropical forests are intricate, and the ecological processes which they entail are only gradually becoming understood. Human interference in these processes frequently leads to unforeseen consequences, silvicultural treatments being apt to be applied long before much is known about the characteristics of the constituent species and the particular successional phases on which treatments have been imposed.Perturbations create gaps of varying sizes. Both regeneration in the gaps and the latter's restoration to a state of equilibrium, depend on their size and the intensity of the disturbance. Deflected successions may occur in sensitive ecosystems whereby progress towards vegetational climax is permanently interrupted. In Africa, the human impact on the natural vegetation has been more severe and for a much longer period than in either the Amazon or in large areas of the Indo-Malaysian rain-forest.Apart from the limitations of existing silvicultural techniques for inducing regeneration and promoting growth, vital management decisions are commonly based on the results of regeneration sampling. But this traditional sampling technique does not make sufficient use of the indications provided by Iiocourt's ‘living space’ theory. However, modified procedures which can easily be undertaken and which assign more appropriate areas of occupation to individual seedlings, saplings, poles, and trees in the stand, provide more realistic estimates of the overall stocking. Though much damage is done to saplings and poles by the felling of large trees, the severity of damage is related more to the number of trees felled than to the basal area or volume removed. However, research into effects of alternative logging regimes (monocyclic versus poly cyclic) is required to resolve, for particular forest types, the issue of appropriate management/silvicultural prescriptions.On the basis of silvicultural research in Nigeria, tentative conclusions have been reached that the growth of a residual stand after exploitation can be accelerated by shelterwood treatments. In particular, climber cutting and opening of the canopy by poisoning are effective treatments in promoting recruitment of saplings and poles from seedlings, and their subsequent growth and survival. Controlled logging can be as effective as a poisoning operation to remove shade-casting, uneconomic emergents, and if substituted for such shelterwood poisoning could reduce the expense of implementing forest treatment.In forest management, account must be taken of differing capacities for growth between different species—especially in response to different silvicultural treatments. Thus in the experiments discussed, heavy poisoning promoted greater increments than selective poisoning, though the difference was not statistically significant.

scholarly journals Silvicultural prescriptions for mixed-species forest stands. A European review and perspective

2021 ◽  
Author(s):  
Hans Pretzsch ◽  
Werner Poschenrieder ◽  
Enno Uhl ◽  
Gediminas Brazaitis ◽  
Ekaterina Makrickiene ◽  
...  
Keyword(s):  
Structural Heterogeneity ◽  
Forest Stands ◽  
Mixed Species ◽  
Temporal Separation ◽  
Tree Number ◽  
Methodological Approaches ◽  
Species Specific ◽  
Space Requirements ◽  
And Control ◽  
Silvicultural Prescriptions

AbstractCompared with far-developed measures and methods for mono-specific forest stands, the silvicultural prescriptions for mixed-species stands are at their early beginning. However, they are essential for the well-conceived establishment, design, and control of mixed-species stands, currently promoted in many countries worldwide. Here, we review the state of the art and we further develop silvicultural prescriptions for mixed-species stands for steering of experiments, stand modeling, and silviculture. We review which aspects of tree species mixing are most relevant for management goal achievement. We found the maintenance of species diversity and structural heterogeneity for ecological purpose, stabilizing productivity, and social-economic performance as main objectives. We give an overview of quantitatively formulated silvicultural prescriptions for steering mixed-species stands for forest practice, long-term experiments, forest stand models. Compared with the sophisticated guidelines for mono-specific stands, prescriptions for mixed stand are often mainly qualitative and vague. Then, we introduce methodological approaches in development for steering mixture: measures for spatial and temporal separation, species-specific growing space requirements for crop trees, coefficients for equivalence and density modification, and basic relationships for steering tree number and area-based mixing proportions. Finally, we draw conclusions for further development of methodological approaches for silvicultural steering of experiments, implementation in stand simulators, and for silvicultural operations. We see the need for improving the quantitative spatially explicit rules based at tree or cohort level, for substantiating the knowledge on species-specific allometry, growing area, tree-to-tree distances, and position-dependent competition indices for steering tree removal. We discuss the prospects and limitations of establishing silvicultural prescriptions for mixed-species stands that inevitably will be more complicated than those for mono-specific stands, and we draw conclusions for next steps in science and practice.

scholarly journals Assessment of Factors Contributing to Residual Tree Damage from Mechanized Harvesting in Northern Hardwoods

2005 ◽  
Vol 22 (2) ◽  
pp. 124-131 ◽  
Author(s):  
Thomas J. Seablom ◽  
David D. Reed
Keyword(s):  
Stand Structure ◽  
Basal Area ◽  
Strong Relationship ◽  
Excessive Amount ◽  
Northern Hardwoods ◽  
Northern Hardwood ◽  
Harvesting Systems ◽  
Residual Tree ◽  
Silvicultural Prescriptions ◽  
Diameter Classes

Abstract Seven northern hardwood stands were evaluated for damage after mechanized harvesting. Four different harvesting systems were evaluated: harvester and grapple skidder, processor and forwarder, chainsaw and cable skidder, and chainsaw and forwarder. There was not an excessive amount of damage occurring to any of the residual stands, and there was an adequate number of residual trees per acre in all diameter classes to meet residual stand structure goals. The majority of the damage that did occur was to the bole portion of the tree and to the 2–8-in. dbh size classes. There was no strong relationship between amount of damage occurring to residual trees and the number of residual trees per acre, residual basal area per acre, or distance to skid trail. These results indicate that mechanized harvesting can be used in northern hardwoods without causing excessive damage to the residual stand. Recommendations are to continue with current silvicultural prescriptions and to increase forester-operator communication to minimize residual tree damage.North. J. Appl. For. 22(2):124–131.

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