scholarly journals Result of study on developing forest seed region in Mongolia

2018 ◽  
pp. 5-14
Author(s):  
Jamyansuren S ◽  
Udval B ◽  
Batkhuu N ◽  
Bat-Erdene J ◽  
Michael Fischer
Keyword(s):  
Genetic Selection ◽  
Siberian Larch ◽  
The Other ◽  
Distribution Area ◽  
Seed Region ◽  
Pinus Sibirica ◽  
Scotch Pine ◽  
Siberian Fir ◽  
Siberian Spruce ◽  
Siberian Pine

In other countries, they usually use auto road and railroad as borders of the forest seed regions. In case of Mongolia, this method is not suitable since sparse population, large distribution area of forests and large territory. Therefore, we used topographical features to determine borders of the seed regions. Satellite images in combination with DEM make it possible to define rivers, streams and mountain ridges as border of forest seed regions. Species included in forest seed regions are: Siberian larch (Larix sibirica Ldb.), Dahurian larch (Larix dahurica Turcz), Chekanovskii larch (Larix chekanowski Szaf.), Scotch pine (Pinus sylvestris L.), Siberian pine (Pinus sibirica Du Tour.), Siberian spruce (Picea obovate Ldb.), and Siberian fir (Abies sibirica Ldb.).Mongolian forests are mountain forests with high altitudinal variation and have dry growth condition hence, seed quality of the main tree species is declining recently. It is required to use seeds from the same seed region. Only if this is not possible the seeds should be obtained from regions with comparable ecological conditions.Local seed is the ones collected from the forests within the border of same seed region, and seed from the other regions are the ones collected from the other seed region. Seeds collected from the plain forests can be used for almost all forest regions, however seeds collected from mountainous regions can only be used within 200-400 m limit of the original altitude.We identified 19 seed regions for Siberian larch and 12 regions for Scots pine, 9 regions for Siberian pine, 6 regions for Siberian fir and 9 seed regions for Siberian spruce forests, respectively. Due to lack of genetic-selection study in Mongolia, this proposed forest seed regions can be considered as preliminary effort and it is possible to changed and improved based on more detailed research results. These forest seed regions proposed by project team can be used as fundamental material for establishing permanent forest seed supply based on genetic-selection characteristics of the forests in different regions in Mongolia.

scholarly journals Result of study on developing forest seed region in Mongolia

2019 ◽  
pp. 18-31
Author(s):  
Jamyansuren S ◽  
Udval B ◽  
Batkhuu N ◽  
Bat-Erdene J ◽  
Michael Fischer
Keyword(s):  
Genetic Selection ◽  
Siberian Larch ◽  
Distribution Area ◽  
Seed Region ◽  
Siberian Spruce ◽  
Seed Supply ◽  
Foreign Countries ◽  
Digital Elevation ◽  
Sparse Population ◽  
Elevation Model

In foreign countries, motor roads and railroads are usually used as borders of forest seed regions. In the case of Mongolia, this method is not suitable in view of the sparse population, large distribution area of forests and the huge territory of the country. Therefore, this study used topographical features to determine the borders of the seed regions. Satellite images in combination with Digital Elevation Model (DEM) make it possible to define rivers, streams and mountain ridges as the borders of forest seed regions. Overall, we identified 19 seed regions for Siberian larch and 12 regions for Scots pine, 9 regions for Siberian pine, 6 regions for Siberian fir and 9 seed regions for Siberian spruce forests. Due to a lack of genetic-selection studies in Mongolia, these proposed forest seed regions can be considered as a preliminary effort with an opportunity to be updated and improved based on more detailed research results. The forest seed regions and maps will play important role as fundamental material for establishing a permanent forest seed supply based on genetic-selection characteristics of the forests in different regions in Mongolia.

Dendrolimus superans sibiricus. [Distribution map].

2007 ◽  
Author(s):  
Keyword(s):  
Far East ◽  
Siberian Larch ◽  
Pinus Sibirica ◽  
Distribution Map ◽  
Picea Jezoensis ◽  
Picea Obovata ◽  
Siberian Fir ◽  
Siberian Spruce ◽  
Central Russia ◽  
Dendrolimus Superans

Abstract A new distribution map is provided for Dendrolimus superans sibiricus (Tschetv). Lepidoptera: Lasiocampidae. Hosts: Khingan, Sakhalin and Siberian fir (Abies nephrolepis, Abies sachalinensis, Abies sibirica), Dahurian and Siberian larch (Larix gmelinii, Larix sibirica), Yeddo and Siberian spruce (Picea jezoensis, Picea obovata), fruit pine (Pinus korainensis) and Pinus sibirica. Information is given on the geographical distribution in Europe (Russia, Central Russia, Eastern Siberia, Far East and Western Siberia) and Asia (China, Heilongjiang, Jilin, Liaoning, Nei Menggu, Kazakhstan, Korea Democratic People's Republic, Korea Republic and Mongolia).

scholarly journals Variability in Elemental Composition of Conifer Tree Rings

2021 ◽  
pp. 24-37
Author(s):  
Vladimir L. Gavrikov ◽  
◽  
Alexey I. Fertikov ◽  
Evgenii A. Vaganov ◽  
Keyword(s):  
Elemental Composition ◽  
Tree Rings ◽  
Chemical Elements ◽  
Dimensional Space ◽  
Siberian Larch ◽  
Growth Conditions ◽  
Pinus Sibirica ◽  
Siberian Spruce ◽  
Long Term Experiment ◽  
Conifer Tree

Distribution of chemical elements in tree rings bears important information on various biogeochemical processes. In order to achieve a reliable interpretation of the information, it is necessary to know the degree of variation in the content of chemical elements both at the level of the entire species and at the level of individual trees. The research aims to determine which chemical elements have a stable distribution in the trunks of a number of conifers: Siberian spruce (Picea obovata Ledeb.), Scots pine (Pinus sylvestris L.), Siberian larch (Larix sibirica Ledeb.), and Siberian pine (Pinus sibirica Du Tour). The data for the analysis were obtained on the basis of the long-term experiment in forest growing. The experimental site was laid out in 1971–1972 in the vicinity of Krasnoyarsk by the staff of the Sukachev Institute of Forest of the Siberian Branch of the Russian Academy of Sciences. Before planting the seedlings, the soil ground was mechanically levelled, and thus, sufficiently equal growth conditions were created for all plantings. Cores with a diameter of 12 mm were sampled from three normally developing trees of each species and analyzed using modern X-ray fluorescence methods. Content relative values of elements (counts) were obtained with the Itrax Multiscanner (COX Analytical Systems). The content of elements in the tree rings was characterized by the concentration and reserve of elements. Concentration was calculated as the number of counts per 1 mm2 of the ring area; reserve was calculated as the number of counts over the entire ring area. Each of these variables was defined by the parameters of linear slope in the calendar year series and the standard deviation. The cluster analysis was performed in the 4-dimensional space of the obtained parameters. This allowed determining whether the series of element distributions from different trees and species are grouped. Three elements (Ca, Co, and P) show high stability of distribution parameters in tree rings with no regard to tree species. A number of other elements (Mn, Pb, Cl, Cr, Ni, Sr, and W) are stably grouped depending on the species. The results of the research enable to focus on the study of the elements stably distributed in the conifer trunks. For citation: Gavrikov V.L., Fertikov A.I., Sharafutdinov R.A., Vaganov E.A. Variability in Elemental Composition of Conifer Tree Rings. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 6, pp. 24–37. DOI: 10.37482/0536-1036-2021-6-24-37

scholarly journals Geoactive Zones and the Structure of Plant Communities in Connection With New Discoveries in Space Geology

2021 ◽  
Vol 7 (1) ◽  
pp. 33-48
Author(s):  
M. Rogozin
Keyword(s):  
Pinus Sibirica ◽  
Comfort Zone ◽  
Space Images ◽  
Picea Obovata ◽  
Siberian Spruce ◽  
Large Trees ◽  
Ring Structures ◽  
Pinus Sibirica Du Tour ◽  
Siberian Pine ◽  
Geodynamic Activity

The purpose of the work is to find out how plants react to such zones and whether their phytoindication is possible. Two territories of the Perm territory were studied: the Vishersky Nature Reserve and forests near Perm. The research methodology included lineament and geostructurometric analysis of space images and special maps using ring structures discovered on the Earth’s surface by Yu. I. Fivenskii, as well as phyto- and bioindication of small geoactive zones. It was found that in the forests near Perm favorable zones of such zones occupy 1.44% of the territory and within their limits the safety of common pine (Pinus sylvestris L.) is 29–42 times higher. Phytoindication of small geoactive zones of 1.0 and 3.0 m by common pine was shown in the zones of influence of these zones: 0–18 cm — the radius of inhibition with the absence of trees; 19–29 cm — the depression zone with small trees; 30–48 cm — the comfort zone with medium and large trees. Two types of networks formed by zones of 1.0 and 8.0 m in size near Perm (on the plain) and in the reserve (in the mountains) were compared. In the mountains, with high geodynamic activity of territories, the networks are oriented in one direction, while on the plain their orientation is misaligned by 30°. In the reserve, large trees of Siberian spruce (Picea obovata Ledeb.) were located on small geoactive zones of 1.0 and 8.0 m, and trees of Siberian pine (Pinus sibirica Du Tour) — on zones 1.0 and 3.0 m in combination with zones 16, 32 and 55 m. In the subgolets zone, ring structures of perennial plants were also found on the first two types of zones. In addition, along the edges of the swamps, chains of trees were found whose direction coincides with ring faults, and the chains themselves are similar to the structure of small geoactive zones networks, and this fractality requires field verification. The hypothesis recharge of plants within geoactive zones is proposed, which also explains the successful growth of trees on rocks, where the amount of available soil is minimal.

scholarly journals THE NATURAL POTENTIAL OF REGENERATION IN FIR FORESTS, DAMAGED DURING THE INVASION OF POLYGRAPHUS PROXIMUS

2017 ◽  
Vol 7 (1) ◽  
pp. 58-68
Author(s):  
Дебков ◽  
Nikita Debkov
Keyword(s):  
Natural Regeneration ◽  
Western Siberia ◽  
Biological Diversity ◽  
Morphological Structure ◽  
Variable Density ◽  
Pinus Sibirica ◽  
Siberian Fir ◽  
Siberian Spruce ◽  
Polygraphus Proximus ◽  
The Impact

In the beginning of this century, the cases of invasions of dendrophilous insects becomes more often. The impact of invadors leads to the degradation of forest ecosystems and loss of natural biological diversity. The article discusses the invasion of Polygraphus proximus Blandf. in fir forests of Western Siberia. The aim of the research was to evaluate the potential of natural regeneration of fir forests in Western Siberia, damaged by Polygraphus proximus. Studies are conducted in the southern part of the Tomsk region at 11 test plots. Objects of research were both one breed fir trees, and grass communities of Siberian fir (Abies sibirica Ledeb.) with participation of Siberian pine (Pinus sibirica Du Tour), Siberian spruce (Picea obovata Ledeb.), silver birch (Betula pendula Roth) and aspen (Populus tremula L.). Surveyed plantations belonged to the ripening or ripe age states. The study of natural regeneration was carried out according to standard procedures. Method of transects was used. Measurements were subjected to basic morphological parameters of the undergrowth. The distribution of the natural regeneration area was estimated by calculating the ratio of occurrence and index of scattering. To assess the affinity of the undergrowth, micromosaic structure of the organization of communities was studied. Analysis of the size and morphological structure of natural regeneration have identified the degree of damage of forest stand and condition of the undergrowth. Dynamics of spatial structure is characterized by heterogeneity (index of dispersion exceeds 1). It indicates group location and its variable density. 82 % of teste plots were recorded with mortality of trees in the impact of Polygraphus proximus. In this case the bulk of the deceased undergrowth is from the major category (95 %), and only 5 % is the average undergrowth. The share of deceased major undergrowth was 9.9-50 %. There was a positive relationship between the number of mortality of trees and status category of fir forest. The number of damaged undergrowth in fir forests varies from 1.2 to 29.6 thousand units/ha. Predominant species is fir. Fir forests of Western Siberia, damaged by Polygraphus proximus, have potential of regeneration. Siberian fir will retain edificatoria value.

Methodological Aspects of Determining Type, Age, and Origin of Archaeological Wood: The Case of Fort Nadym

2020 ◽  
Vol 48 (3) ◽  
pp. 80-89
Author(s):  
V. S. Myglan ◽  
G. T. Omurova ◽  
V. V. Barinov ◽  
O. V. Kardash
Keyword(s):  
Material Culture ◽  
Methodological Approach ◽  
Siberian Larch ◽  
Pinus Sibirica ◽  
Tundra Zone ◽  
Forest Tundra ◽  
Siberian Spruce ◽  
Archaeological Wood ◽  
Ethnic History ◽  
Pinus Sibirica Du Tour

Archaeological studies in the forest-tundra zone of Western Siberia are highly relevant to studying the material culture, social structure, and ethnic history. The presence of permafrost ensures the unique preservation of organics in cultural layers, including timber, which makes it possible to conduct dendrochronological studies (calendar dating of samples, determination of species composition, typological analysis, and the source of the timber origin). In 2011–2012, during the excavations at Fort Nadym, 347 samples of wood were selected for the assessment of the age of wooden structures. The results showed that most samples belonged to three species of trees: Siberian larch (Larix sibirica Ledeb.), Siberian spruce (Picea obovata Ledeb.), and Siberian pine (Pinus sibirica Du Tour). The typological analysis revealed that walls were mostly built from spruce, pine logs, and half-logs, whereas the floors were made from larch and pine. To assess the origin of wood, a new methodological approach was proposed. As a result, it was demonstrated that the main building material was driftwood. This has allowed us to make more accurate interpretations and to specify the years of construction. The analysis indicates three periods of construction / reconstruction: the 1450s–1460s, 1470s–1480s, and 1520s–1570s. The new approach can be applied to other wooden monuments located on the banks of major water arteries of the Siberian forest-tundra zone.

Biometric relationships of the Argentinean prawn Artemesia longinaris (Decapoda: Penaeidae) in the south-western Atlantic

2010 ◽  
Vol 90 (7) ◽  
pp. 1385-1393 ◽  
Author(s):  
L.F.C. Dumont ◽  
F. D'Incao
Keyword(s):  
Population Structure ◽  
Marked Reduction ◽  
The Other ◽  
Distribution Area ◽  
Southern Brazil ◽  
Simple Linear Regression ◽  
The South ◽  
Western Atlantic ◽  
Relative Growth ◽  
Autumn And Winter

Biometric relationships of size and weight were estimated for the Argentinean prawn (Artemesia longinaris), a new commercial penaeid prawn exploited in the south-western Atlantic. Morphometric and meristic traits were used to elucidate population structure of this species along its distribution area. The morphological relationships were estimated by a simple linear regression, considering total length (TL) as the dependent variable. The males collected in southern Brazil, an area under influence of the Subtropical Convergence, presented a slightly lower TL increment than females. A marked reduction in slopes of males between populations from southern Brazil was observed in autumn and winter. Additionally, relative growth in length of males from Argentina is similar to that observed during autumn and winter in southern Brazil. The other morphometric and meristic variables used also indicated higher similarities between southern Brazil and Argentina, which may be explained by relative growth associated to water temperatures or migration during winter, taking advantage of the oceanographic systems connecting both sites. Moreover, the population from Rio de Janeiro seems morphologically apart from the others, forming a separate unit stock.

scholarly journals Accelerated formation of Siberian pine (Pinus sibirica Du Tour) stands: a case study from Siberia

2019 ◽  
Vol 65 (No. 8) ◽  
pp. 291-300
Author(s):  
Nikita Debkov
Keyword(s):  
Seed Production ◽  
Threshold Value ◽  
Pinus Sibirica ◽  
Natural Conditions ◽  
Normal Seed ◽  
Pine Trees ◽  
Pinus Sibirica Du Tour ◽  
Siberian Pine ◽  
Production Dynamics

Under natural conditions, Siberian pine Pinus sibirica begins to produce commercial cone yields of nuts relatively late (after more than 100 years). The aim of this study was to summarise the experience of the directed formation of Siberian pine forests in Siberia. Experimental objects included plots with traditional thinning of varying intensity and frequency as well as chemical treatment. We assessed the parameters of the stand and its seed production dynamics. Only stands with a minimum density (395–435 trees·ha–1) had a normal seed production energy (1.5 or more cones per shoot). Over-dense stands (830–930 trees·ha–1) were characterised by a low seed production energy (two times or more below the threshold value). In all plots, there were Siberian pine trees with absent or unacceptable seed production energy, which should be removed (DBH up to 28 cm). Seed production energy positively correlated with most tree parameters (age, height, diameter, volume, length and width of crown).

Variability in the Proportion and Type of Subunits in Lupin Storage Globulins

1975 ◽  
Vol 2 (1) ◽  
pp. 29 ◽  
Author(s):  
JM Gillespie ◽  
RJ Blagrove
Keyword(s):  
Protein Structure ◽  
Electrophoretic Mobility ◽  
Relative Proportion ◽  
Genetic Selection ◽  
Molecular Size ◽  
The Other ◽  
Subunit Composition ◽  
Molecular Weights ◽  
Species Specific ◽  
Conglutin Γ

The seeds of 12 species of lupin were examined and were found to contain two major globulins, conglutins α and β, while some contained a third minor globulin, conglutin �. There were considerable differences between species in the electrophoretic mobility and proportions of conglutins α and β, and in their subunit composition in terms of the number of components, their molecular weights and the importance of disulphide bonding between them. However, the electrophoretic behaviour and subunit composition of conglutins α and β did appear to be species-specific. Conglutin γ, on the other hand, did not seem to vary in molecular size or electrophoretic mobility within this genus. The 18 cultivars of Lupinus angustifolius examined appeared to be more closely related in terms of the number and size of subunits, although variations were apparent in the relative proportion of these subunits, especially with wild types. It is suggested that this variability in the protein structure of lupin globulins may provide evidence that substantial changes can be induced by genetic selection in the composition of these proteins without upsetting their structure-function relations.

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