Foraging behaviour of cattle and goats in oak forest stands of varying coppicing age in Northern Greece

2005 ◽  
Vol 59 (2-3) ◽  
pp. 181-189 ◽  
Author(s):  
T.G. Papachristou ◽  
P.D. Platis ◽  
A.S. Nastis
Keyword(s):  
Foraging Behaviour ◽  
Oak Forest ◽  
Forest Stands ◽  
Northern Greece

scholarly journals STANDARDS FOR DETERMINING OF GROWING STOCK AND DIMENSIONAL-QUALITATIVE STRUCTURE OF MATURE AND OVERMATURE COPPICE OAK FOREST STANDS

2018 ◽  
pp. 41-47
Author(s):  
O. A. Slysh ◽  
V. P. Pasternak
Keyword(s):  
Form Factor ◽  
Correlation Analysis ◽  
Volume Ratio ◽  
Oak Forest ◽  
Forest Stands ◽  
Waste Wood ◽  
Growing Stock ◽  
Qualitative Structure ◽  
The Relationship ◽  
Current Standards

The results of the study of solid-volume/stacked-volume ratio, the relationship between heights and diameters, as well as the dimensional and qualitative structure of oak stems in mature and overmature forest stands are presented. Correlation analysis is performed and interrelations between taxation indicators are evaluated. Mathematical models of height, form factor and dimensional-qualitative structure of tree stems were developed, on the basis of which volume tables, a class scale of heights and tables of the dimensional and qualitative structure of tree oak stands were constructed. It was established that the percentage of output of coarse, medium and small merchantable wood, firewood and waste wood doesn’t significantly depend on the class of heights. Comparison of the developed standards with the current ones showed that the yield of commercial timber according to the results of the conducted study is 5% on average, and that of coarse commercial wood for stems with a diameter of more than 48 cm is 3-8% less than the current standards.

scholarly journals The Effect of Combined Herbivory by Wild Boar and Small Ruminants on the Regeneration of a Deciduous Oak Forest

Forests ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 580
Author(s):  
Eleni Abraham ◽  
Paraskevi Sklavou ◽  
Aikaterini Loufi ◽  
Zoi Parissi ◽  
Apostolos Kyriazopoulos
Keyword(s):  
Wild Boar ◽  
Plant Cover ◽  
Small Ruminants ◽  
Canopy Cover ◽  
Animal Husbandry ◽  
Site Quality ◽  
Oak Forest ◽  
Forest Site ◽  
Northern Greece ◽  
Long Time

The multiple agroforestry land uses of oak forests are of great ecological and economic interest as they contribute to the improvement of animal husbandry, wildlife, and environment. However, herbivory by wildlife and livestock highly affects the structure and the dynamic of forest ecosystems including its regeneration. The aim of this study was to investigate the comparative effect of wild boar and small ruminants herbivory on the regeneration of a deciduous oak forest in northern Greece. Eight sites were selected in an even aged stand of similar canopy cover and forest site quality: four sites with long-time use mainly by wild boar and four sites with long-time grazing by sheep and browsing by goats. A plot of 150 m2 in each of the sites was fenced in order to be protected from herbivory. The plant cover and number of oak seedlings and acorns was measured in both grazed and protected plots for four consecutive years. The plant cover increased in the protected plots independent of the type of animals. The seedling cover decreased about 29% and 9% in sites where small ruminants and wild boars foraged respectively. Similarly, the number and the weight of acorns significantly decreased in the sites grazed by small ruminants mainly during the mast year of the oaks. Forest management has to control the small ruminants grazing in terms of intensity, timing, and duration in order to ensure the sustainability of the ecosystem.

Forest-typological scales of seed oak forests of Voronezh region

10.12737/3347 ◽  
2014 ◽  
Vol 4 (1) ◽  
pp. 64-74 ◽  
Author(s):  
Хлюстов ◽  
Vitaliy Khlyustov ◽  
Мусиевский ◽  
Aleksandr Musievskiy
Keyword(s):  
Regression Equation ◽  
Oak Forests ◽  
Oak Forest ◽  
Forest Stands ◽  
Voronezh Region ◽  
Age Range ◽  
Statistical Indicators

Calculated statistical indicators of numerical equation coefficients indicate significance of obtained regressions for each TFC (FT). The resulting regression equation allows carrying out calculations for all oak forest TFC (FT) of Voronezh region, in the age range of stands from 10 to 300 years, for completeness – from 0.3 to 1.0, the share of participation of oak in the composition of forest stands from 1 to 10 units. Developed forst typological scales for natural seed oak forests can detect patterns of increase of growth in trophotopes and ecotypes and within ecotypes and trophotopes – by hygrotopes.

scholarly journals The content of chlorophyll a and chlorophyll b in leaves of undergrowth species in hornbeam-oak forest stands of the forest-steppe zone in Western Ukraine

2018 ◽  
Vol 79 (1) ◽  
pp. 23-28
Author(s):  
Volodymyr Zaïka ◽  
Taras Bondarenko
Keyword(s):  
Chlorophyll A ◽  
Canopy Cover ◽  
Vegetation Period ◽  
Steppe Zone ◽  
Growth Conditions ◽  
Forest Steppe ◽  
Oak Forest ◽  
Forest Stands ◽  
Pigment Complex ◽  
Western Ukraine

Abstract In this study, the biosynthesis of the plastid pigments chlorophyll a and b was examined for the most common shrubs in hornbeam-oak forest stands of the Western forest-steppe zone of Ukraine. The characteristics of the pigments’ biosynthesis were determined in terms of plant species, vegetation period and growth conditions (under canopy cover and out in the open). The gathered data on the changes of the pigment complex with respect to the examined variables confirms the sensitivity of plastid pigment biosynthesis to environmental factors.

A seasonal evaluation of the reformulated Gash interception model for semi-arid deciduous oak forest stands

2018 ◽  
Vol 409 ◽  
pp. 601-613 ◽  
Author(s):  
O. Fathizadeh ◽  
S.M. Hosseini ◽  
R.F. Keim ◽  
A. Darvishi Boloorani
Keyword(s):  
Oak Forest ◽  
Forest Stands ◽  
Semi Arid

scholarly journals Impact of honeybee (Apis mellifera L.) density on wild bee foraging behaviour

2016 ◽  
Vol 60 (1) ◽  
pp. 49-62 ◽  
Author(s):  
Georgios Goras ◽  
Chrysoula Tananaki ◽  
Maria Dimou ◽  
Thomas Tscheulin ◽  
Theodora Petanidou ◽  
...  
Keyword(s):  
Honey Bee ◽  
Honey Bees ◽  
Foraging Behaviour ◽  
Northern Greece ◽  
Wild Bees ◽  
Honey Production ◽  
Visitation Frequency ◽  
Before And After ◽  
Bee Foraging ◽  
Visit Duration

Abstract Honey bees are globally regarded as important crop pollinators and are also valued for their honey production. They have been introduced on an almost worldwide scale. During recent years, however, several studies argue their possible competition with unmanaged pollinators. Here we examine the possible effects of honey bees on the foraging behaviour of wild bees on Cistus creticus flowers in Northern Greece. We gradually introduced one, five, and eight honey-bee hives per site, each containing ca. 20,000 workers. The visitation frequency and visit duration of wild bees before and after the beehive introductions were measured by flower observation. While the visitation frequencies of wild bees were unaffected, the average time wild bees spent on C. creticus increased with the introduction of the honey-bee hives. Although competition between honey bees and wild bees is often expected, we did not find any clear evidence for significant effects even in honey-bee densities much higher than the European-wide average of 3.1 colonies/km2.

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