scholarly journals Ecological features of groups of rove beetles (Coleoptera: Staphylinidae) in beech forest ecosystems of the lower forest belt of the Gorgan massif

2020 ◽  
Vol 0 (3(24)) ◽  
pp. 29-34
Author(s):  
Marіana Lutskа ◽  
Artur Sirenko
Keyword(s):  
Forest Ecosystems ◽  
Beech Forest ◽  
Forest Belt ◽  
Rove Beetles ◽  
Ecological Features

scholarly journals Mg isotope composition in beech forest ecosystems and variations induced by liming: insights from four experimental sites in Northern France

2021 ◽  
Author(s):  
Mélanie Court ◽  
Gregory van der Heijden ◽  
Pascale Louvat ◽  
Emile Bolou-Bi ◽  
Guillaume Caro ◽  
...  
Keyword(s):  
Forest Ecosystems ◽  
Isotope Composition ◽  
Beech Forest ◽  
Northern France

scholarly journals Problématique du bilan de carbone dans les écosystèmes forestiers: exemple d'une jeune hêtraie de plaine | Problematics of the Carbon Net-Balance Within the Forest Ecosystems: a Juvenile Beech Forest in the Lowlands

2000 ◽  
Vol 151 (9) ◽  
pp. 317-324
Author(s):  
André Granier ◽  
Claire Damesin ◽  
Daniel Epron ◽  
Valérie Le Dantec
Keyword(s):  
Biomass Production ◽  
Forest Ecosystems ◽  
Photosynthetic Activity ◽  
Carbon Fluxes ◽  
Beech Forest ◽  
High Variability ◽  
Daily Cycles

The results of an investigation carried through within the ‹Euroflux›-programme in eastern France assessing the carbon fluxes above the canopy of the forest are presented. The photosynthetic activity within the annual and daily cycles are discussed. The high variability of the carbon netbalance and the variation of the total respiration make further research into the understanding of the correlation between the carbon net-balance and the biomass production necessary.

scholarly journals Uncoupling of microbial community structure and function in decomposing litter across beech forest ecosystems in Central Europe

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Witoon Purahong ◽  
Michael Schloter ◽  
Marek J. Pecyna ◽  
Danuta Kapturska ◽  
Veronika Däumlich ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Central Europe ◽  
Microbial Community Structure ◽  
Forest Ecosystems ◽  
Beech Forest ◽  
Structure And Function ◽  
And Function

scholarly journals Ammonia emissions from beech forest after leaf fall – measurements and modelling

2012 ◽  
Vol 9 (11) ◽  
pp. 15633-15665
Author(s):  
K. Hansen ◽  
L. L. Sørensen ◽  
O. Hertel ◽  
C. Geels ◽  
C. A. Skjøth ◽  
...  
Keyword(s):  
Forest Ecosystems ◽  
Beech Forest ◽  
Deciduous Forests ◽  
Leaf Fall ◽  
Natural Ecosystems ◽  
Area Index ◽  
Model Calculations ◽  
Plant Area Index ◽  
Plant Area ◽  
Dynamic Description

Abstract. The understanding of biochemical feed-back mechanisms in the climate system is lacking knowledge in relation to bi-directional ammonia (NH3) exchange between natural ecosystems and the atmosphere. We therefore study the atmospheric NH3 fluxes during a 25 days period during autumn 2010 (21 October–15 November) for the Danish beech forest, Lille Bøgeskov, to address the hypothesis that NH3 emissions occur from deciduous forests in relation to leaf fall. This is accomplished by using observations of vegetation status, NH3 fluxes and model calculations. Vegetation status was observed using plant area index (PAI) and leaf area index (LAI). NH3 fluxes were measured using the relaxed eddy accumulation (REA) method. The REA based NH3 concentrations were compared to NH3 denuder measurements. Model calculations were obtained with the Danish Ammonia MOdelling System (DAMOS). 57.7% of the fluxes measured showed emission and 19.5% showed deposition. The mean NH3 flux was 0.087 ± 0.19 μg NH3-N m−2 s−1. A clear tendency of the flux going from negative (deposition) to positive (emission) fluxes of up to 0.96 ± 0.40 μg NH3-N m−2 s−1 throughout the measurement period was found. In the leaf fall period (23 October–8 November), an increase in the atmospheric NH3 concentrations was related to the increasing forest NH3 flux. The modelled concentration from DAMOS fits well the measured concentrations before leaf fall. During and after leaf fall, the modelled concentrations are too low. The results indicate that the missing contribution to atmospheric NH3 concentration from vegetative surfaces related to leaf fall are of a relatively large magnitude. We therefore conclude that emissions from deciduous forests are important to include in model calculations of atmospheric NH3 for forest ecosystems. Finally, diurnal variations in the measured NH3 concentrations were related to meteorological conditions, forest phenology and the spatial distribution of local anthropogenic NH3 sources. This suggests that an accurate description of ammonia fluxes over forest ecosystems requires a dynamic description of atmospheric and vegetation processes.

Radiation monitoring in forest ecosystems Central forest-steppe Russia

2015 ◽  
Vol 5 (3) ◽  
pp. 93-101
Author(s):  
Скрипников ◽  
Viktor Skripnikov ◽  
Щетинкин ◽  
Sergey Shchetinkin
Keyword(s):  
Woody Plants ◽  
Forest Ecosystems ◽  
Growth Conditions ◽  
Radiation Monitoring ◽  
Forest Growth ◽  
Oak Forests ◽  
Forest Steppe ◽  
Degree Of Contamination ◽  
Ecological Features ◽  
Biological Specificity

It was found that during the period of observation at hospitals forestry radiation monitoring in fresh upland oak forests and wet Pinetum compositum main drive radiocaesium is oak, which is connected, apparently, with its biological and ecological features. It is also clear that, along with the biological specificity of a particular tree species, an important role in the accumulation of woody plants play a cesium type of forest growth conditions (trophicity, humidity). In woody plants most contaminated surface tissues that make up the crust. Further, the degree of contamination, followed by leaves (needles), small branches, wood with bark and wood peeled, where radiocaesium virtually identified.

scholarly journals Photosynthetic activity of Fagus sylvatica L. and Quercus petraea (Matt) Liebl. in a mixed stand at Maljen mountain

2005 ◽  
Vol 57 (4) ◽  
pp. 305-306
Author(s):  
Zorica Popovic ◽  
Aleksandar Mijovic ◽  
Branko Karadzic ◽  
Miroslava Mijatovic ◽  
S. Skoric
Keyword(s):  
Gas Exchange ◽  
Fagus Sylvatica ◽  
Water Saturation ◽  
Water Status ◽  
Beech Forest ◽  
Quercus Petraea ◽  
Tree Canopy ◽  
Forest Belt ◽  
Water Saturation Deficit ◽  
Fagus Sylvatica L

Estimation of the photosynthetic performance of co-existing tree species with pronounced differences in ecophysiological context (Aranda et al. 1996 Leuschner et al. 2001) could provide insight into their vitality and competitive abilities at a particular site. Gas exchange, composition of photosynthetic pigments, and the water status of beech (Fagus sylvatica L) and sessile oak (Quercus petraea (Matt) Liebl) were studied in the present work. The investigation was performed on Mt. Maljen (Western Serbia, near the town of Mionica) at an altitude of 950 m, in an ecotope within the confines of the mountain's beech forest belt. Codominant samplings [three of each species, 30-years old (n=6), 10-12 m high] were selected for the measurements, which were conducted on fully developed leaves from the out?ermost branches and from the innermost canopy. Photosynthetic measurements were performed using an LI-6200 closed photo?synthesis system (LI-Cor. Inc, Lincoln, NE, USA), while irradiance was detected with a selenium cell mounted on the leaf chamber. Parameters of gas exchange are expressed on the basis of leaf area, using the AREAMETER software (Karadzic et al. 1999). Chlorophyll content was spectrophotometrically determined based on light absorption of the solution obtained after extraction with dMSO (Hiscox and Israelstam, 1979). The midday water saturation deficit was determined according to Turner (1981). For data analysis, we used the Statistic for Windows program package. The ANOVA one-way break?down was applied to compare differences within (leaves inside vs. leaves outside the surface of the tree canopy) and between species for all investigated parameters at the 0.05 level of significance.

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