scholarly journals Assessment of the state of coenopopulations Erythronium sibiricum (Fischer et Meyer) Krylov in anthropogenically disturbed areas of Kuzbass

2021 ◽  
Vol 20 (1) ◽  
pp. 234-236
Author(s):  
O. A. Klimova
Keyword(s):  
Age Structure ◽  
Forest Canopy ◽  
Pine Forest ◽  
Birch Forest ◽  
Rare Plant ◽  
Normal Type ◽  
Left Handed ◽  
Disturbed Areas ◽  
Meadow Communities ◽  
The Russian Federation

This article presents the results of studies of cenopopulations of the Erythronium sibiricum in the disturbedareas of Kemerovo region. Erythronium sibiricum is a rare plant listed in the Red Book of the Russian Federation. To assess the condition of the cenopulations of the studied species in disturbed territories, research was carried out on an oldlimestone quarry (kandyk-sedge birch forest, anthropogenically altered birch-pine forest) and on anthropogenically disturbed meadows. 4 phytocenoses of various compositions have been studied. As a result of research, it was found that inthe kandyk-sedge birch forest Erythronium sibiricum occupies 10 % of the herbaceous cover, in the anthropogenically altered birch-pine forest – 5 %, in anthropogenically disturbed grasslands Erythronium sibiricum occurs singly and makesup less than 1% of the herbaceous cover. Under the forest canopy, the biometric indicators of generative individuals of thisspecies are higher than in meadow communities, where, for example, the length of generative shoots is 6–8 cm less, or generative individuals are absent. No seedlings, senile and dying individuals were found in the age spectrum of Erythroniumsibiricum cenopulations. Reproduction of the species occurs by seed. In the age structure, all cenopulations are left-handed, incomplete, of the normal type.

Ozone fluxes above and within a pine forest canopy in dry and wet conditions

2002 ◽  
Vol 36 (1) ◽  
pp. 77-88 ◽  
Author(s):  
E. Lamaud ◽  
A. Carrara ◽  
Y. Brunet ◽  
A. Lopez ◽  
A. Druilhet
Keyword(s):  
Forest Canopy ◽  
Pine Forest ◽  
Ozone Fluxes ◽  
Dry And Wet Conditions

scholarly journals Recent Development in Micropropagation Techniques for Rare Plant Species

Plants ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1733
Author(s):  
Vasiliy A. Chokheli ◽  
Pavel A. Dmitriev ◽  
Vishnu D. Rajput ◽  
Semyon D. Bakulin ◽  
Anatoly S. Azarov ◽  
...  
Keyword(s):  
Plant Species ◽  
Russian Federation ◽  
Biological Diversity ◽  
Rare Plant ◽  
Endangered Plant ◽  
Current Investigation ◽  
Future Prospects ◽  
Rare And Endangered ◽  
The Russian Federation ◽  
Global And Local

The current investigation aimed to present an overview of the conservation of biological diversity of rare and endangered plant species. Methods of biodiversity conservation as well as several overview recommendations for the preservation of various rare species have been considered. An overview of the taxa included in the red book has been presented on the example of the Russian Federation. Global and local codes and classifiers of plant rarity were also presented. Future prospects for the conservation of biological diversity and the creation and development of bioresource collections have been considered.

scholarly journals Carbonyl sulfide exchange in a temperate loblolly pine forest grown under ambient and elevated CO<sub>2</sub>

2010 ◽  
Vol 10 (2) ◽  
pp. 547-561 ◽  
Author(s):  
M. L. White ◽  
Y. Zhou ◽  
R. S. Russo ◽  
H. Mao ◽  
R. Talbot ◽  
...  
Keyword(s):  
Loblolly Pine ◽  
Standard Error ◽  
Forest Canopy ◽  
Carbonyl Sulfide ◽  
Co2 Enrichment ◽  
Minor Component ◽  
Co2 Assimilation ◽  
Pine Forest ◽  
Mixing Ratios ◽  
Canopy Position

Abstract. Vegetation, soil and ecosystem level carbonyl sulfide (COS) exchange was observed at Duke Forest, a temperate loblolly pine forest, grown under ambient (Ring 1, R1) and elevated (Ring 2, R2) CO2. During calm meteorological conditions, ambient COS mixing ratios at the top of the forest canopy followed a distinct diurnal pattern in both CO2 growth regimes, with maximum COS mixing ratios during the day (R1=380±4 pptv and R2=373±3 pptv, daytime mean ± standard error) and minimums at night (R1=340±6 pptv and R2=346±5 pptv, nighttime mean ± standard error) reflecting a significant nighttime sink. Nocturnal vegetative uptake (−11 to −21 pmol m−2s−1, negative values indicate uptake from the atmosphere) dominated nighttime net ecosystem COS flux estimates (−10 to −30 pmol m−2s−1) in both CO2 regimes. In comparison, soil uptake (−0.8 to −1.7 pmol m−2 s−1) was a minor component of net ecosystem COS flux. In both CO2 regimes, loblolly pine trees exhibited substantial COS consumption overnight (50% of daytime rates) that was independent of CO2 assimilation. This suggests current estimates of the global vegetative COS sink, which assume that COS and CO2 are consumed simultaneously, may need to be reevaluated. Ambient COS mixing ratios, species specific diurnal patterns of stomatal conductance, temperature and canopy position were the major factors influencing the vegetative COS flux at the branch level. While variability in branch level vegetative COS consumption measurements in ambient and enhanced CO2 environments could not be attributed to CO2 enrichment effects, estimates of net ecosystem COS flux based on ambient canopy mixing ratio measurements suggest less nighttime uptake of COS in R2, the CO2 enriched environment.

scholarly journals Principles and Criteria of Phytocenotic Diversity Conservation (Through the Example of European Countries and Russia)

2019 ◽  
Author(s):  
T M Lysenko ◽  
A V Ivanova ◽  
N V Kostina ◽  
T N Davidenko ◽  
V M Vasiukov ◽  
...  
Keyword(s):  
Plant Communities ◽  
Russian Federation ◽  
European Countries ◽  
Monitoring Data ◽  
Rare Plant ◽  
Legal Basis ◽  
Vegetation Monitoring ◽  
Determination Process ◽  
The Russian Federation ◽  
The Creation

The article presents the review of currently existing views on the problem of phytocoenotic diversity protection in European countries and Russia. The principles and criteria for the identification of rare plant communities in need of protection, used by scientists from different countries are described. The authors had defined already published works of a monographic nature and projects, containing the information on the phytocenotic diversity of Europe in need of protection, and Green Books, published in the Russian Federation. Special attention is paid to the determination process of plant communities. It is noted that nowadays there is no single concept for the creation of Green Books. The phytocenosis protection inventories created in European countries that have a legislative basis, the Russian Green Books include vegetation monitoring data and have no legal basis.

scholarly journals AERIAL SEEDING APPLICATION FOR REFORESTATION

2021 ◽  
Author(s):  
D. Demidov
Keyword(s):  
Russian Federation ◽  
Forest Canopy ◽  
Unmanned Aircraft ◽  
Unmanned Aircraft Systems ◽  
Aircraft Systems ◽  
The Russian Federation ◽  
Aerial Seeding ◽  
Forest Seeds

Due to the presence in the forest fund of the Russian Federation of a sufficient number of areas that are inaccessible, unsuitable or inefficient for the use of ground-based mechanization tools (felling, burning, forest canopy, ravine-beam network, slopes), it is advisable to sow forest seeds from the air using unmanned aircraft systems.

scholarly journals Observations of HNO<sub>3</sub>, ΣAN, ΣPN and NO<sub>2</sub> fluxes: evidence for rapid HO<sub>x</sub> chemistry within a pine forest canopy

2007 ◽  
Vol 7 (3) ◽  
pp. 7087-7136 ◽  
Author(s):  
D. K. Farmer ◽  
R. C. Cohen
Keyword(s):  
Nitrogen Oxides ◽  
Sierra Nevada ◽  
Residence Time ◽  
Ponderosa Pine ◽  
Forest Canopy ◽  
Similarity Theory ◽  
Peroxy Radical ◽  
Pine Forest ◽  
Alkyl Nitrates ◽  
Emission Fluxes

Abstract. Measurements of exchange of reactive nitrogen oxides between the atmosphere and a ponderosa pine forest in the Sierra Nevada Mountains are reported. During winter, we observe upward fluxes of NO2, and downward fluxes of total peroxy and peroxy acyl nitrates (ΣPNs), total gas and particle phase alkyl and multifunctional alkyl nitrates (ΣANs(g+p), and the sum of gaseous HNO3 and semi-volatile NO3− particles (HNO3(g+p). We use calculations of the vertical profile and flux of NO, partially constrained by observations, to show that net midday ΣNOyi fluxes in winter are –4.9 ppt m s−1. The signs and magnitudes of these wintertime individual and ΣNOyi fluxes are in the range of prior measurements. In contrast, during summer, we observe downward fluxes only of ΣANs(g+p), and upward fluxes of HNO3(g+p), ΣPNs and NO2 with signs and magnitudes that are unlike most, if not all, previous observations and analyses of fluxes of individual nitrogen oxides. The results imply that the mechanisms contributing to NOy fluxes, at least at this site, are much more complex than previously recognized. We show that the observations of upward fluxes of HNO3(g+p) and ΣPNs during summer are consistent with oxidation of NO2 and acetaldehyde by OH with the product of concentration and residence time equal to 1.1×1010 molec OH cm−3 s, e.g. 3×107 molecules cm−3 OH for a 400 s canopy residence time. We show that ΣAN(g+p) fluxes are consistent with this same OH if the reaction of OH with ΣANs produces either HNO3 or NO2 in 6–30% yield. Calculations of NO fluxes constrained by the NO2 observations and the inferred OH indicate that NOx fluxes are downward into the canopy because of the substantial conversion of NOx to HNO3 and ΣPNs in the canopy. Even so, we derive that NOx emission fluxes of ~15 ng(N) m−2 s−1 at midday during summer are required to balance the NOx and NOy flux budgets. These fluxes are partly explained by estimates of soil emissions (estimated to be between 3 and 6 ng(N) m−2 s−1). One possibility for the remainder of the NOx source is large HONO emissions. Alternatively, the 15 ng(N) m−2 s−1 emission estimate may be too large, and the budget balanced if the deposition of HNO3 and ΣPNs is slower than we estimate, if there are large errors in either our understanding of peroxy radical chemistry, or our assumptions that the budget is required to balance because the fluxes do not obey similarity theory.

scholarly journals Russian Emigration at the Turn of 21st Century

2018 ◽  
Vol 29 (2) ◽  
Author(s):  
Olga Vorobyeva ◽  
Ivan Aleshkovski ◽  
A. A. Grebenyuk
Keyword(s):  
21St Century ◽  
Age Structure ◽  
Federal State ◽  
Benchmark Analysis ◽  
National Statistics ◽  
The Past ◽  
Russian Immigrants ◽  
Foreign Countries ◽  
The Russian Federation ◽  
Migration Flows

The article deals with the evolution of the Russian emigration processes at the turn of the 21st century. Based on the quantitative and qualitative analysis of the Russian emigration flows over the past 25 years, the authors highlighted five emigration waves characterized by their main emigrant categories and emigration channels. Attention has been given not only to the size of the emigration flows but also to the emigration flow’s own compositional characteristics, especially age structure. The authors’ benchmark analysis of the Russian emigration data provided by the Federal State Statistics Service of the Russian Federation and the data on Russian immigrants provided by the national statistics services of foreign countries showed the overwhelming quantitative discrepancies in the migration flows set out in the Russian statistics, thus underestimating the intensity of emigration.

RESTORATION OF PRESETTLEMENT AGE STRUCTURE OF AN ARIZONA PONDEROSA PINE FOREST

1999 ◽  
Vol 9 (1) ◽  
pp. 228-239 ◽  
Author(s):  
Joy Nystrom Mast ◽  
Peter Z. Fulé ◽  
Margaret M. Moore ◽  
W. Wallace Covington ◽  
Amy E. M. Waltz
Keyword(s):  
Age Structure ◽  
Ponderosa Pine ◽  
Pine Forest ◽  
Ponderosa Pine Forest
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