How individual tree characteristics and forest management influence occurrence and richness of tree-related microhabitats in Mediterranean mountain forests

Abstract The paper presents procedures for determining market values of forest real properties, with particular emphasis placed on the forest stand. The mixed-approach valuation procedure - land valuation index method - was analyzed. The practical part of the work regarding the valuation of the forest stand introduces the various techniques of valuation and acquisition of data on forest resources used, i.e.: index-based valuation approach and stock survey approach. The subject of the research is part of a forest property, which represents an assessment area, typical of the southern part of Poland, located in the Tenczynek Forest Division. There is a forest management plan for the analyzed property which, together with the assessment descriptions, was used as one of the sources of data for valuation. The second source of data for valuation were direct field surveys, i.e.: geodetic surveys for determining the assessment area and the stock survey approach with individual tree assessment with respect to data on the stand. Based on the research, it may be concluded that both valuation techniques and methods used to capture data on forest resources significantly affect the final value of forest properties. The market value of the stand, determined by the index-based valuation approach, demonstrates a significant difference when compared to the value of the stand determined by the stock survey approach. The forest management plan should only be used as a supplementary material and only to identify site types of forests by property valuers and, partially, together with economic maps, to determine the boundaries of assessment areas.

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Stand structure links up canopy processes and forest management

Forestry Studies / Metsanduslikud Uurimused ◽

10.2478/v10132-011-0076-8 ◽

2009 ◽

Vol 51 (1) ◽

pp. 40-48

Author(s):

Toomas Frey

Keyword(s):

Forest Management ◽

Stand Structure ◽

Net Primary Production ◽

Stand Density ◽

Tree Height ◽

Belowground Biomass ◽

Unit Mass ◽

Total Biomass ◽

Individual Tree ◽

Mean Values

Stand structure links up canopy processes and forest management Above- and belowground biomass and net primary production (Pn) of a maturing Norway spruce (Picea abies (L.) Karst.) forest (80 years old) established on brown soil in central Estonia were 227, 50 and 19.3 Mg ha correspondingly. Stand structure is determined mostly by mean height and stand density, used widely in forestry, but both are difficult to measure with high precision in respect of canopy processes in individual trees. However, trunk form quotient (q2) and proportion of living crown in relation to tree height are useful parameters allowing describe stand structure tree by tree. Based on 7 model trees, leaf unit mass assimilation activity and total biomass respiration per unit mass were determined graphically as mean values for the whole tree growth during 80 years of age. There are still several possible approaches not used carefully enough to integrate experimental work at instrumented towers with actual forestry measurement. Dependence of physiological characteristics on individual tree parameters is the missing link between canopy processes and forest management.

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Presenting MASSIMO: A Management Scenario Simulation Model to Project Growth, Harvests and Carbon Dynamics of Swiss Forests

Forests ◽

10.3390/f10020094 ◽

2019 ◽

Vol 10 (2) ◽

pp. 94 ◽

Cited By ~ 11

Author(s):

Golo Stadelmann ◽

Christian Temperli ◽

Brigitte Rohner ◽

Markus Didion ◽

Anne Herold ◽

...

Keyword(s):

Forest Management ◽

Timber Harvesting ◽

Reference Levels ◽

Management Scenarios ◽

Individual Tree ◽

Development Models ◽

Management Scenario ◽

Species Mixture ◽

The Individual ◽

Business As Usual

Forest development models have been used to predict future harvesting potentials and forest management reference levels under the Kyoto guidelines. This contribution aims at presenting the individual-tree simulator MASSIMO and demonstrating its scope of applications with simulations of two possible forest management reference levels (base or business as usual) in an example application. MASSIMO is a suitable tool to predict timber harvesting potentials and forest management reference levels to assess future carbon budgets of Swiss forests. While the current version of MASSIMO accurately accounts for legacy effects and management scenarios, effects of climate and nitrogen deposition on growth, mortality, and regeneration are not yet included. In addition to including climate sensitivity, the software may be further improved by including effects of species mixture on tree growth and assessing ecosystem service provision based on indicators.

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Sustainable management of mountain forests in the Czech Republic

Journal of Forest Science ◽

10.17221/4651-jfs ◽

2012 ◽

Vol 50 (No. 11) ◽

pp. 526-532 ◽

Cited By ~ 3

Author(s):

S. Vacek ◽

V. Balcar

Keyword(s):

Czech Republic ◽

Forest Management ◽

Forest Ecosystems ◽

Sustainable Forest Management ◽

Self Regulation ◽

Raw Material ◽

Anthropogenic Factors ◽

Mountain Forests ◽

Natural Forests ◽

The Czech Republic

Forest management in the Czech Republic (CR) was not shaped in the environment of natural forests but in the territory that was influenced by unregulated felling and animal grazing for a long time. Hence the fear for sustainable and balanced benefits from forests endangered by long-term uncontrolled exploitation was legitimate. Almost after three centuries of application of the sustainability principle, forests are considered not only as a source of renewable wood raw material but also as a tool of the environment formation. Mountain forests are an important landscape component of this country. They are an object of specific importance from the aspect of natural environment conservation, stabilization of natural processes and general landscape homeostasis. In addition, they fulfil a number of production and non-production functions. Cardinal elements of sustainable forest management in the CR conditions are as follows: management of the forest as an ecosystem, i.e. transition from exclusive care of forest tree species and their stands to care of the whole forest ecosystems; restructuring (conversion, reconstruction) of damaged and declining forests; optimum (species, genetic, spatial, age) structure of forest ecosystems differentiated according to site conditions and management targets; differentiated transition from general management to group or individual methods; utilization and support of spontaneous processes such as natural regeneration, competition and other principles of self-regulation. The above cardinal elements of sustainable forest management are applicable to forests of the CR in general, but their importance considerably increases in mountain forests where many species survive on the margin of subsistence. Moreover, mountain forests of CR have been heavily destroyed by anthropogenic factors, especially air-pollution ecological stresses, during the last three or four decades.

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Growth of Black Spruce Trees Following Fertilization on Drained Peatland

The Forestry Chronicle ◽

10.5558/tfc65102-2 ◽

1989 ◽

Vol 65 (2) ◽

pp. 102-106 ◽

Cited By ~ 5

Author(s):

Bijan Payandeh

Keyword(s):

Black Spruce ◽

Linear Regression Analysis ◽

Volume Growth ◽

Average Diameter ◽

Multiple Linear Regression Analysis ◽

Stepwise Multiple Linear Regression ◽

Individual Tree ◽

Individual Trees ◽

Volume Equations ◽

Tree Characteristics

Stem analyse of 67 peatland black spruce trees from previously drained experimental areas in northeastern Ontario that had been fertilized was used to examine effects on growth of individual trees. Stepwise multiple linear regression analysis was used to express pre- and post-fertilization diameter and volume growth as a function of site, stand and individual tree characteristics and amelioration treatments.Results indicated that, on average, diameter growth increased by 4% after fertilization. Standard volume equations, in comparison with sectional volume summation underestimated both inside- and outside-bark tree volumes by about 3%.

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Individual Tree Segmentation Method Based on Mobile Backpack LiDAR Point Clouds

Sensors ◽

10.3390/s21186007 ◽

2021 ◽

Vol 21 (18) ◽

pp. 6007

Author(s):

Lino Comesaña-Cebral ◽

Joaquín Martínez-Sánchez ◽

Henrique Lorenzo ◽

Pedro Arias

Keyword(s):

Forest Management ◽

Data Collection ◽

Laser Scanning ◽

Point Clouds ◽

Real World Data ◽

High Detection Rate ◽

Individual Tree ◽

Competition Analysis ◽

Dbscan Clustering ◽

Growth Features

Individual tree (IT) segmentation is crucial for forest management, supporting forest inventory, biomass monitoring or tree competition analysis. Light detection and ranging (LiDAR) is a prominent technology in this context, outperforming competing technologies. Aerial laser scanning (ALS) is frequently used for forest documentation, showing good point densities at the tree-top surface. Even though under-canopy data collection is possible with multi-echo ALS, the number of points for regions near the ground in leafy forests drops drastically, and, as a result, terrestrial laser scanners (TLS) may be required to obtain reliable information about tree trunks or under-growth features. In this work, an IT extraction method for terrestrial backpack LiDAR data is presented. The method is based on DBSCAN clustering and cylinder voxelization of the volume, showing a high detection rate (∼90%) for tree locations obtained from point clouds, and low commission and submission errors (accuracy over 93%). The method includes a sensibility assessment to calculate the optimal input parameters and adapt the workflow to real-world data. This approach shows that forest management can benefit from IT segmentation, using a handheld TLS to improve data collection productivity.

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Transpiration and water potential of young Quercus petraea (M.) Liebl. coppice sprouts and seedlings during favourable and drought conditions

Journal of Forest Science ◽

10.17221/36/2017-jfs ◽

2017 ◽

Vol 63 (No. 7) ◽

pp. 313-323 ◽

Cited By ~ 4

Author(s):

Stojanović Marko ◽

Szatniewska Justyna ◽

Kyselová Ina ◽

Pokorný Radek ◽

Čater Matjaž

Keyword(s):

Forest Management ◽

Water Potential ◽

Leaf Water Potential ◽

Weather Conditions ◽

Growing Season ◽

Adaptive Strategy ◽

Quercus Petraea ◽

Leaf Water ◽

Individual Tree ◽

Drought Conditions

Increased frequency and intensity of drought events consequently affect oak high forests with the process of further decline, compromised growth and questionable natural regeneration. To overcome such difficulties, new adaptive strategies are required. Coppicing, as the oldest way of forest management, might provide some solutions. In our study two contrasting management systems, sessile oak coppice and high forest, were compared at the initial stages of regeneration and forest development. The transpiration of young oak sprouts and seedlings was monitored using sap flow systems during the 2015 growing season. The study of transpiration also included leaf water potential measurements during three measurement campaigns with contrasting weather conditions. Coppice sprouts transpired significantly more than seedlings on the individual tree and stand level during the entire growing season 2015; particularly large differences were observed during drought conditions. Coppice sprouts experienced lower water limitations due to the voluminous and deeper root system as indicated by leaf water potential results. Presented results attribute young coppices as one of the promising adaptable forest management types with a better adaptive strategy at the extreme sites under water limiting conditions.

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Predicting height growth of sugar pine regeneration using stand and individual tree characteristics

Forestry An International Journal of Forest Research ◽

10.1093/forestry/cpt028 ◽

2013 ◽

Vol 87 (1) ◽

pp. 85-98 ◽

Cited By ~ 5

Author(s):

N. Angell ◽

K.M. Waring ◽

T.A. Graves

Keyword(s):

Height Growth ◽

Individual Tree ◽

Pine Regeneration ◽

Sugar Pine ◽

Tree Characteristics

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Gebirgswaldbau – vom finanziellen Rückgrat der Berggemeinden zum Risikomanagement | Mountain forest management: risk management of the financial backbone of mountain communities

Schweizerische Zeitschrift fur Forstwesen ◽

10.3188/szf.2005.0516 ◽

2005 ◽

Vol 156 (12) ◽

pp. 516-520

Author(s):

Monika Frehner

Keyword(s):

Risk Management ◽

Forest Management ◽

Mountain Forest ◽

Mountain Forests ◽

Wood Production ◽

Protective Function ◽

Mountain Communities ◽

The Past ◽

Framework Conditions

Over the past decades the framework conditions pertaining to the care of mountain forests have changed radically. Wood production has become less and less profitable whereas public demands placed on the forest have grown considerably, particularly with regard to its protective function. The paper gives an overview of the most important developments since the appointment of Jean-Philippe Schütz at ETH Zurich as professor of silviculture. We concentrate on the following issues; firstly the teaching of mountain silviculture, which has been carried out since 1980 by Professor Schütz. Secondly, implementation,which since 1984 has been fostered by the Swiss Mountain Silvicultural group and, thirdly, developments with regard to projects.

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