scholarly journals Restoration of Forest Ecosystems on Disturbed Lands on the Northern Forest Distribution Border (North-East of European Russia)

10.5772/31874 ◽  
2012 ◽  
Author(s):  
Irina Likhanova ◽  
Inna Archegov
Keyword(s):  
Forest Ecosystems ◽  
European Russia ◽  
Northern Forest ◽  
North East ◽  
Forest Distribution

Spatial variability of trace metals in Podzols of northern forest ecosystems: Sampling implications

2003 ◽  
Vol 83 (5) ◽  
pp. 581-587 ◽  
Author(s):  
J. D. MacDonald ◽  
W. H. Hendershot
Keyword(s):  
Trace Metals ◽  
Spatial Variability ◽  
Point Source ◽  
Forest Ecosystems ◽  
Physical Factors ◽  
Individual Plant ◽  
Forest Site ◽  
Organic Carbon Content ◽  
Metal Concentrations ◽  
Northern Forest

The concentrations of metals in soils are spatially heterogeneous and soil sampling carried out when studying metals in forest ecosystems is often inadequate. We examined the spatial variability of Cd, Cu, Mn, Ni, Pb and Zn in northern forest ecosystems on a transect with distance from two point source emitters with the goal of providing basic information about the distribution and variability of metals in these soils. Samples were taken under six sampling points at four depths from three experimental sites on each of the two transects. Soils were analysed for acid digestible metals, pH and organic carbon content. Standard deviation, coefficients of variation, mean and medians were analysed for each horizon of each site. It was observed that Cu and Mn variability is higher in closer proximity to the point source while the variability of Zn increased with decreasing soil pH. In Sudbury, emitted metals Ni and Cu accumulate together in soils, whereas in Rouyn-Noranda, with the exception of Cd and Zn, metal concentrations were not related in forest floors. Observations suggest that physical factors influencing where metals are deposited as well as the inherent variability in soil chemical characteristics, and the distance from the point source can all act together to result in high variability in soil metal concentrations in a single forest site. Sampling in the interest of relating vegetation metal concentrations or response to soil metals should be carried out on an individual plant basis with multiple samples taken for each individual. Soil samples taken at intervals of 1 to 1.7 m will provide relative error in estimating soil concentrations of 10% or 20%, respectively. Key words: Spatial variability, trace metals, podzolic soils, smelter emissions

Insect Defoliators as Periodic Disturbances in Northern Forest Ecosystems

2007 ◽  
pp. 487-525 ◽  
Author(s):  
Barry J. Cooke ◽  
Vincent G. Nealis ◽  
Jacques Régnière
Keyword(s):  
Forest Ecosystems ◽  
Northern Forest ◽  
Periodic Disturbances

Testate amoeba as palaeohydrological indicators in the permafrost peatlands of north-east European Russia and Finnish Lapland

2017 ◽  
Vol 32 (7) ◽  
pp. 976-988 ◽  
Author(s):  
Hui Zhang ◽  
Matthew J. Amesbury ◽  
Tiina Ronkainen ◽  
Dan J. Charman ◽  
Angela V. Gallego-Sala ◽  
...  
Keyword(s):  
European Russia ◽  
Testate Amoeba ◽  
East European ◽  
North East ◽  
Finnish Lapland

scholarly journals Vitality Structure of the Populations of Vegetative Motile Plants of Forest Ecosystems of the North-East of Ukraine

2019 ◽  
Vol 13 (1) ◽  
pp. 125-132
Author(s):  
Kovalenko Ihor ◽  
Skliar Iurii ◽  
Klymenko Hanna ◽  
Kovalenko Nataliia
Keyword(s):  
Quality Index ◽  
Forest Ecosystems ◽  
Morphological Structure ◽  
Field Studies ◽  
Complete Analysis ◽  
Individual Plant ◽  
North East ◽  
The North ◽  
Motile Species ◽  
Two Populations

Background: The vitality level of the populations has turned out to be statistically reliably associated with such coenotic factors: age and density of forest stand. In general, the vitality spectra vary widely: the quality index Q of the populations ranges from 0,00 to 0,50, that is, it fully covers the theoretically possible scale of the values of this coefficient, which indicates the sensitivity of the vitality structure of the populations to the ecological-coenotic conditions and determines high informative value of the vitality analysis. Objective: The aim of the study is to assess the vitality structure of the populations of vegetative motile plant species – typical representatives of the grassy layer of forest ecosystems of the North-East of Ukraine as a factor that determines their stability and dynamics. Methods: The analysis of the vitality structure is based on the field studies of the populations of 4 vegetative motile species of plants – Aegopodium podagraria L., Asarum europaeum L., Carex pilosa Scop. and Stellaria holostea L. in forest ecosystems of the North-East of Ukraine. Vitality analysis was carried out according to Yu. A. Zlobin’s methodology. Vitality analysis procedure, classically, is carried out in three stages: 1) Selection of quantitative features that characterize the vital status of the individual plant; 2) Evaluation of vitality of individual plants that were included in the sample; 3) Integral assessment of the population’s vitality. Depending on the ratio in the population of plants of classes a, b and c, the population belongs to one of three vitality types: prosperous, equilibrium or depressive. Results: The obtained estimates of the vitality structure of populations of the clone-forming plants in the grass-shrub layer of forests of the North-East of Ukraine can be considered quite reliable, because they are based, in general, on a complete analysis of the morphological structure of about 13 thousand ramets of the studied species of plants. The statistical reliability of estimates of the population’s vitality structure is predominantly between 70 and 99% and only in some cases lower than 70%. As the clone grows older, its ramet’s vitality decreases and the clone degrades. New young clones, that start to form on the basis of genets, replace old ones. Such ramets have increased vitality, greater stress and competitive resistance. Due to the mechanisms of clone substitution in the living cover, the dominance of nemoralis herbs persists for a long time. Conclusion: The vitality spectra of the populations of the studied species of plants vary widely: the quality index Q of the populations ranges from 0,00 to 0,50, that is, it covers full theoretically possible scale of the values of this coefficient, which indicates the sensitivity of the vitality structure of the populations to the ecological-coenotic conditions and determines high informative value of vitality analysis. Prosperous populations: two populations A. europaeum of the associations Quercetum (roboris) coryloso (avellanae) – convallariosum (majalis) and Quercetum (roboris) coryloso (avellanae) – convallariosum (majalis), two populations A. podagraria of the associations – Pinetum (sylvestris) vacciniosum (myrtilli) and Querceto (roboris) – Pinetum (sylvestris) convallarioso (majalis) – vacciniosum (myrtilli), one population S. holostea of the association Querceto (roboris) – Pinetum (sylvestris) vacciniosum (myrtilli) and one population C. pilosa of the association Querceto (roboris) – Pinetum (sylvestris) vaccinioso (myrtilli) – convallariosum (majalis).

Length–biomass and energy relationships of terrestrial gastropods in northern forest ecosystems

1997 ◽  
Vol 75 (3) ◽  
pp. 501-505 ◽  
Author(s):  
J. W. Hawkins ◽  
M. W. Lankester ◽  
R. A. Lautenschlager ◽  
F. W. Bell
Keyword(s):  
Boreal Forest ◽  
Efficient Method ◽  
Forest Floor ◽  
Forest Ecosystems ◽  
Northern Forest ◽  
Terrestrial Gastropods ◽  
Power Equation ◽  
Biomass Models ◽  
Energy Relationships ◽  
Underlying Soil

Length–biomass models are a convenient and time-efficient method of estimating the biomass of invertebrates. Our purpose was to develop such a model for terrestrial gastropods that adequately predicted gastropod dry tissue biomass (Y) on the basis of animal length (X). The power equation Y = 0.172X1.688 (r2 = 0.85) proved to be the best model for this purpose. Gastropod dry tissue biomass was 6.52 ± 1.58 mg (mean ± SE) and, based on gastropod densities ranging from 2 to 38/m2 reported in the literature, snails and slugs active on the surface of the forest floor accounted for 2.5 and 6% of the total animal biomass and energy, respectively, of boreal forest ecosystems. However, because densities of gastropods in both the litter and underlying soil can reach 1607/m2, our results suggest that published values for total animal biomass (4.9 g/m2) and caloric energy (104 cal/m2) in boreal forest ecosystems are underestimated.

Nitrogen Saturation in Northern Forest Ecosystems

BioScience ◽  
1989 ◽  
Vol 39 (6) ◽  
pp. 378-386 ◽  
Author(s):  
John D. Aber ◽  
Knute J. Nadelhoffer ◽  
Paul Steudler ◽  
Jerry M. Melillo
Keyword(s):  
Forest Ecosystems ◽  
Nitrogen Saturation ◽  
Northern Forest

Photosynthetic efficiency of northern forest ecosystems using a MODIS-derived Photochemical Reflectance Index (PRI)

2016 ◽  
Vol 187 ◽  
pp. 345-366 ◽  
Author(s):  
E.M. Middleton ◽  
K.F. Huemmrich ◽  
D.R. Landis ◽  
T.A. Black ◽  
A.G. Barr ◽  
...  
Keyword(s):  
Photosynthetic Efficiency ◽  
Forest Ecosystems ◽  
Northern Forest ◽  
Photochemical Reflectance Index
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