scholarly journals ONTOGENESIS AND AGE STRUCTURE OF ADONIS VERNALIS L. POPULATIONS IN THE CONDITIONS OF NORTHERN KAZAKHSTAN

THE BULLETIN ◽  
2020 ◽  
Vol 5 (387) ◽  
pp. 56-64
Author(s):  
G.J. Sultangazina ◽  
◽  
А.N. Kuprijanov ◽  
О.А. Kuprijanov ◽  
R.S. Beyshov ◽  
...  
Keyword(s):  
Age Structure ◽  
Field Research ◽  
Forest Edge ◽  
Forest Steppe ◽  
Forest Edges ◽  
Recovery Index ◽  
Northern Kazakhstan ◽  
Age Related ◽  
Study Results ◽  
Current Article

The current article presents study results made on the coenoflora of Adonis vernalis L. in Northern Kazakhstan. The materials have been gathered in the course of field research taking into account the literary data. Ontogenesis and age structure of the coenopopulations are provided on the basis of detailed-route studies. The study of age-related stages was carried out on the territory of Northern Kazakhstan (Akmola and North Kazakhstan regions) in 2018-2019. A. vernalis is a short-stem grassy polycarpic plant, it is represented in Northern Kazakhstan by the populations of dry meadows (Kokshetau Upland) and real meadows (the forest-steppe of North Kazakhstan region). Ontogenesis of A. vernalis has three periods and 7 age stages. Plants have low seed productivity. Seeds have a long endogenous peace related to the underdevelopment of a seed germ. A characteristic feature is the presence of a long pregenerative period in plants of the "steppe" type coenopopulations and its reduction in the "meadow" type coenopopulations. There have been studied thirteen coenopopulations of A. vernalis located in Akmola and North Kazakhstan regions. Coenopopulations of A. vernalis are bound to four main habitats: forest edges, meadow steppes, meadows, artificial plantations. By age, young populations are formed on forest edges, and according to the "delta - omega" classification, there are mature coenopopulations. Mature coenopopulations are mostly formed in meadow steppes, but according to the "delta - omega" classification, all coenopopulations are aging. On meadows, there are many young coenopopulations, but according to the "delta - omega" classification, they are all mature. In artificial plantings, the majority of coenopopulations are aging, but according to the "delta - omega" classification, they are all mature. Thus, changes in habitual living conditions lead to the aging of A. vernalis coenopopulations. By density (pcs/100 m2) all populations are divided into three groups: high, medium, low. All forest edge coenopopulations have a high density, in meadow steppes, the density is average, on meadows and in artificial plantings it is low. The recovery index in most coenopopulations is less than one which indicates a low recovery in A. vernalis populations. The range of age stages shows that in most coenopopulations they are normal, the exception is CP-5 (among artificial plantings) which indicates an old stage of the population and possibly its soon elimination.

scholarly journals The structure of Adonis wolgensis Stev. coenopopulation in the conditions of Northern Kazakhstan

2020 ◽  
Vol 99 (3) ◽  
pp. 134-139
Author(s):  
Gulnara Sultangazina ◽  
◽  
Аndrey Kuprijanov ◽  
Oleg Kuprijanov ◽  
Мaxim Steshenko ◽  
...  
Keyword(s):  
Negative Impact ◽  
Field Research ◽  
Anthropogenic Factors ◽  
High Recovery ◽  
Recovery Index ◽  
Northern Kazakhstan ◽  
Study Results ◽  
Normal Character ◽  
Steppe Meadow ◽  
Forest Habitats

The article presents the study results made on the Adonis wolgensis coenopopulation in Northern Kazakhstan (2018–2019). The materials have been gathered in the course of field research taking into account the literary data. The age structure of the coenopopulations is provided on the basis of detailed route studies. There have been studied eight coenopopulations located in Akmola, Pavlodar, and Kostanay regions. A. wolgensis is a short-stem herbaceous polycarpic of Northern Kazakhstan. A. wolgensis coenopopulations are found in three main habitats: steppe, meadow-steppe, and forest communities. The study of A. wolgensis coenopopulations in the latitudinal direction from Ekibastuz in the east to the Kostanay region in the west has revealed a high recovery index in steppe ecotopes. In other coenopopulations it is less than one. It is especially low in forest habitats. Most coenopopulations have a normal character according to the spectrum of age conditions, and they are maturing. This fact proves no negative impact of environmental and anthropogenic factors on the structure of coenopopulations and ensures their recovery and preservation.

scholarly journals ONTOGENESIS AND AGE STRUCTURE OF THE PULSATILLA MULTIFIDA MILL POPULATIONS IN THE CONDITIONS OF NORTHERN KAZAKHSTAN

THE BULLETIN ◽  
2020 ◽  
Vol 6 (388) ◽  
pp. 46-53
Author(s):  
Sultangazina G.J., ◽  
◽  
Kuprijanov А.N., ◽  
Kuprijanov О.А., ◽  
Beyshov R.S., ◽  
...  
Keyword(s):  
Old Age ◽  
Age Structure ◽  
Field Research ◽  
Juvenile Stage ◽  
Natural Conditions ◽  
Mass Flowering ◽  
Age Related ◽  
Study Results ◽  
Rocky Habitats ◽  
Generative Stage

The article provides the study results on the age-related stages of Pulsatilla multifida Mill. The materials have been gathered in the course of field research taking into account the literary data. The studies were carried out in the Pavlodar and Akmola regions during the season of mass flowering and seeds ripening (2018-2019). A rosette shoot is formed on the stage of seedlings out of 3-4 leaves of different complexity. On the juvenile stage the rosette shoot is formed out of 4-5(6) leaves. The leaves are tripartite, dissected into large lobes and in their turn are cut into prongs. The root system is represented by a stem-root and many roots of the second order. Immature individuals undergo the formation of an elongated rhizome. Leaf-blades are tripartite with deeply dissected lobes. 1-3 rosette shoots grow from resumption buds. The calendar age of an immature plant is 1-2 years. On the virginal stage, there is an increase of resumption buds and rosette modules, the formation of a powerful rhizome with numerous resumption buds on it. Leaves acquire a specificity: the number of prongs on the leaves becomes narrow, middle leaves develop a petiole of different lengths. Young generative plants have 1-3 peduncles and 1-3 rosette shoots. On average generative stage, the rhizome forms a many-headed caudex with numerous rosette shoots. In old age the number of rosette shoots decreases, the peduncles remain underdeveloped and do not start blooming. The leaves are cut into very narrow lobes with a large number of prongs, while the length of the petiole at the central lobe becomes minimal. In subsenile plants, there is a maceration of rhizomes to a greater depth with the formation of vegetative rosettes on separate parcels and they are represented by a system of dying rhizomes, with single vegetative sockets. The coenopopulations of P. multifida and P. aggr. patens are found in rocky habitats, except CP-1 (a glade between the rocks) where P. multifida grows on a dry meadow among steppe shrubs. All the studied populations are generative, the density of species is high enough to ensure the normal existence of the species in natural conditions.

scholarly journals COENOFLORA OF ADONIS VERNALIS L. IN NORTHERN KAZAKHSTAN

2020 ◽  
Vol 1 (383) ◽  
pp. 33-41 ◽  
Author(s):  
G. J. Sultangazina ◽  
А. N. Kuprijanov ◽  
О. А. Kuprijanov ◽  
R. S. Beyshov
Keyword(s):  
Woody Plants ◽  
Field Research ◽  
Herbaceous Plants ◽  
Perennial Species ◽  
Meadow Steppe ◽  
Northern Kazakhstan ◽  
Current Article ◽  
Ephemeral Species

The current article presents the results of the study made on Adonis vernalis L. coenoflora of Northern Kazakhstan. The materials have been obtained in the course of field research considering the literary data. The list of Adonis vernalis L. flora discovered in Northern Kazakhstan is based on detailed route studies. The coenoflora of Adonis vernalis L. in Northern Kazakhstan includes 140 species belonging to 31 families and 96 genera. The leading families are Artemisia, Veronica, Achillea, Galatella, Lathyrus, Potentilla, Seseli, Silene. The majority of species belongs to perennial species, annuals and biennials are represented by six species, and there is only one ephemeral species. Woody and semi-woody plants are represented by three trees, five shrubs and one semishrub. Among the herbaceous plants there are more long-rooted and stem-rooted species. The coenoflora mainly consists of mesophytes (68 species) and xeromesophytes (57 species). There are 15 species of xerophytes, which makes 10,7%. A little number of xerophytes proves meadow and meadow-steppe nature of the coenoflora.

Ambiguity in public sector performance measurement: a systematic literature review

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Chiara Oppi ◽  
Cristina Campanale ◽  
Lino Cinquini
Keyword(s):  
Public Sector ◽  
Literature Review ◽  
Performance Measurement ◽  
Systematic Literature Review ◽  
Field Research ◽  
Future Research ◽  
Academic Journal ◽  
Content Type ◽  
The Public ◽  
Study Results

PurposeThis paper presents a systematic literature review aiming at analysing how research has addressed performance measurement systems’ (PMSs) ambiguities in the public sector. This paper embraces the ambiguity perspective that PMSs in public sector coexist with and cope with existing ambiguities.Design/methodology/approachThe authors conducted a literature review in Scopus and ScienceDirect, considering articles published since 1985, and the authors selected articles published in the journals included in the Association of Business Schools' Academic Journal Guide (Chartered ABS, 2018). Of the 1,278 abstracts that matched the study’s search criteria, the authors selected 131 articles for full reading and 37 articles for the final discussion.FindingsThe study's key findings concern the elements of ambiguity in PMSs discussed in the literature. The study’s results suggest that ambiguity is still a relevant problem in performance measurement, as a problem that is impossible to be solved and therefore needs to be better understood by researchers and public managers. The analysis allows us to summarize the antecedents and consequences of ambiguity in the public sector.Research limitations/implicationsThe key findings of the study concern the main sources of ambiguity in PMSs discussed in the literature, their antecedents and their consequences. The study results suggest that ambiguity exists in performance measurement and that is an issue to be handled with various strategies that can be implemented by managers and employees.Practical implicationsManagers and researchers may benefit from this research as it may represent a guideline to understand ambiguities in their organizations or in field research. Researchers may also benefit from a summary list of the key issues that have been analysed in the empirical cases provided by this research. Social implicationsThis research may provide insights to limit ambiguity and thus contribute to improve performance measurement in the public sector.Originality/valueThis research presents a comprehensive review on the topic. It provides insight that suggests what future research should attend to in helping to interpret ambiguity, considering also what should be done to influence ambiguity.

Influence of foliar fertilization of plants with humid preparations on the productivity of spring barley in the Eastern Forest-Steppe of Ukraine

2021 ◽  
Vol 2020 (1-2) ◽  
pp. 63-72
Author(s):  
V.Y. Bukhalo ◽  
G.I. Sukhova
Keyword(s):  
Grain Yield ◽  
Spring Barley ◽  
Field Research ◽  
Barley Grain ◽  
Forest Steppe ◽  
Barley Plant ◽  
Foliar Fertilization ◽  
Current State ◽  
Growth Stimulant ◽  
Plant Growth Stimulants

The article analyzes the current state and improvement of elements of the technology of growing valuable forage and food crops, spring barley in Ukraine. It is noted that in recent years the area under large crops and the yield of this crop have decreased significantly. It is emphasized that further improvement of technologies should be focused on the transition to more use of biological agents to increase yields. Researchers have shown that the effectiveness of the use of humid preparations GK-6M, GK-4MK, GK-MK - on crops of spring barley Dokuchaivsky 15, due to foliar feeding of plants in the tiller ring phase. The main justification of the article is the results of field research conducted in 2015–2019. Maximum indicators, namely: increase in leaf area by 46–38 %, stem height by 8,3 cm; the number of grains in the ear – 4,8 pieces; ear lengths – 1,9 cm; mass of grain in the ear – 0,33 g; masses of 1000 grains – at 12,0 %; nature of grain – 34,9 g – was obtained by treating plants with humid preparation GK-6M. Foliar feeding of plants in the tiller ring phase with the studied drugs provided the largest increase in the yield of spring barley grain – 1,08 t/ha, provided the use of growth stimulant GK-6M. A slightly smaller effect of foliar fertilization of plants on the yield of spring barley was observed from the growth stimulator GK-4MK – the increase in grain yield was 0,83 t/ha and from the growth stimulant GK-MK – the increase in grain yield – 0,66 t/ha. The obtained increments are significant, mathematically proven. Further improvement of agrotechnologies due to wider use of biological means of increase of productivity and quality of production is offered. Keywords: spring barley, plant growth stimulants, foliar feeding, yield.

scholarly journals Correlation between Degenerative Changes and Osteoporosis in Lumbar Spine of Elderly Women in Dhaka city, Bangladesh

2018 ◽  
Vol 10 (1) ◽  
pp. 18-21 ◽  
Author(s):  
Sultana Amena Ferdoucy ◽  
Md Anower Hussain Mian ◽  
Nasrin Akhter ◽  
Md Shafiqul Alam ◽  
MA Sadek
Keyword(s):  
Lumbar Spine ◽  
Elderly Women ◽  
Significant Negative Correlation ◽  
Cross Sectional Study ◽  
Degenerative Changes ◽  
Mineral Density ◽  
Cross Sectional ◽  
Age Related ◽  
Younger Age ◽  
Study Results

Aims: Degenerative joint diseases and decreased bone mass i.e.  osteoporosis are two common age related skeletal disorders  responsible for pain and disability. Bangladesh has a high incidence  of osteoporosis and the incidence particularly in women, occurs  among a relatively younger age group than in the developed world.  However little is known about the correlation between degenerative  changes and osteoporosis in lumbar spine of elderly women. The  purpose of this study was to clarify this relationship in elderly women  of Dhaka, Bangladesh.  Methods: A cross-sectional study was conducted at the department  of radiology and imaging of Bangladesh institute of research and  rehabilitation in diabetes, endocrine and metabolic disorders  (BIRDEM), Dhaka during the period of 1st January, 2009 to 31st  December, 2010. DEXA scan of spine and BMD measurement were  done at a renowned private hospital of Dhaka. Total 63 elderly female  aged between 50-75 years were randomly selected for this study.  Results: An inverse relationship between osteoporosis and  spondylosis in postmenopausal women as evaluated by bone  mineral density and semiquantitative scoring of spinal degeneration  was observed. A significant negative correlation (r=-0.53:p<0.05)  was found between T-score and grade. DOI: http://dx.doi.org/10.3329/cdcj.v10i1.13740 City Dent. Coll. J Volume-10, Number-1, January-2013

scholarly journals Studies of Ant-Following Birds North of the Eastern Amazon

1972 ◽  
Vol 2 (2) ◽  
pp. 127-151 ◽  
Author(s):  
Yoshika Oniki ◽  
Edwin O. Willis
Keyword(s):  
Forest Edge ◽  
Forest Edges ◽  
Army Ants ◽  
Forest Interior ◽  
Second Growth

Abstract Birds that prey on arthropods flushed by army ants north of the eastern Amazon were studied at Serra do Navio and Reserva Ducke (Brazil) and at Nappi Creek and Bartica (Guyana). Regular ant-followers are two medium-sized antbirds (Percnostola rufifrons and Gymnopithys rufigula) and two smaller ones (Pithys albifrons and Hylophylax poecilonota), plus five woodcreepers of differing sizes (from very large Hylexetastes perrotti through Dendrocolaptes picumnus, D. certhia, and Dendrocincla merula to medium-sized Dendrocincla fuliginosa). Four other regular ant-followers occur in the region but were not found at the study areas. Forty-five species of casual or nonprofessional ant-followers, including 16 antbirds, 5 woodcreepers, and 5 manakins, also were recorded. Percnostola rufifrons tends to be at the forest edge or in second growth. Pithys albifrons works around Gymnopithys rufigula, Hylophylax poecilonota peripheral to both, in the forest interior. The large Dendrocolaptes picumnus and medium-large Dendrocincla merula often capture prey near the ground, like antbirds. Unlike antbirds, which use vertical or horizontal slender perches, the woodcreepers use thick vertical perches. Dendrocolaptes certhia and Dendrocincla fuliginosa also tend to capture prey high over the ground-foraging antbirds. The woodcreepers tend to forage lower at midday. Hylexetastes perrotti is rare, and overlaps strongly with D. picumnus. There is fairly large overlap among the 9 professional ant-followers, and large ones chase away smaller ones. Nonprofessional birds tend to forage briefly or peripherally when or slightly after the professional species are active. They also forage above the antbirds and below or above the woodcreepers, and concentrate at forest edges or in second growth. The guild of ant-following birds in this region differs fairly widely from guilds in Panamá and at Belém, Brazil; the absence of large antbirds and the predominance of large woodcreepers north of the Amazon are the major differences.

Reproductive senescence in free-ranging North American elk Cervus elaphus Cervidae

Mammalia ◽  
2019 ◽  
Vol 83 (6) ◽  
pp. 593-600 ◽  
Author(s):  
Louis C. Bender ◽  
Jessica R. Piasecke
Keyword(s):  
Age Structure ◽  
Cervus Elaphus ◽  
North American ◽  
Reproductive Senescence ◽  
Female Age ◽  
North American Elk ◽  
Age Related ◽  
Consistent Manner ◽  
Multiple Species ◽  
Free Ranging

Abstract Successful production of calves is necessary for growth of North American elk (Cervus elaphus Linnaeus 1758) populations, but few studies have evaluated age-related effects on both the conception and survival of a calf to weaning in multiple free-ranging populations. Conception and survival of calves to weaning were both affected by maternal age, with old (age 9 and older) females showing reproductive senescence as compared to prime-aged (ages 2–8) females despite achieving similar or greater size and condition. Reproductive senescence in our free-ranging populations ultimately resulted in old females weaning fewer calves (0.42 calves/female) than did prime-aged females (0.64 calves/female). Other factors, especially maternal size, also influenced conception and survival to weaning, and these interacted with age in a consistent manner, i.e. larger females or females in better condition were more likely to conceive and successfully wean calves within each age class. Female age structure receives less consideration in ungulate management than does male age structure, despite demonstrated impacts on population productivity of multiple species because of reproductive senescence. Because of the large proportion of individuals in senesced age classes in elk populations, low productivity in populations may simply reflect female age structure, rather than other frequently hypothesized factors.

scholarly journals Differences in the Motor Coordination Abilities Among Adolescent Gymnasts, Swimmers, and Ice Hockey Players

2017 ◽  
Vol 18 (1) ◽  
Author(s):  
Timo Jaakkola ◽  
Anthony Watt ◽  
Sami Kalaja
Keyword(s):  
Motor Coordination ◽  
Ice Hockey ◽  
Specific Training ◽  
Young Athletes ◽  
Test Protocol ◽  
Male Adolescents ◽  
Age Related ◽  
Study Results ◽  
Hockey Players ◽  
Better Than

AbstractPurpose. Motor coordination is proposed to be a relatively stable age-related construct, unlikely to be influenced by aligned experiential factors such as intensive sport-specific training. The purpose of the study is to investigate if there are differences in motor coordination abilities among young artistic gymnasts, swimmers, and ice hockey players.Methods. The participants of the study were 508 female and 258 male adolescents (age, M = 12.80, SD = 1.10) comprising artistic gymnasts (n = 463), swimmers (n = 70), and ice hockey players (n = 233). The KTK-test protocol was used to analyse their gross motor coordination abilities.Results. The results of the study demonstrated that gymnasts scored better than ice hockey players and swimmers in the test of walking backwards along a beam, and better than ice hockey players in total motor coordination, hopping over an obstacle, and the test of moving sideways on wooden boards. However, ice hockey players scored higher than swimmers and gymnasts in the test of jumping from side to side. Subsequently, swimmers obtained better results in the test of moving sideways on wooden boards as compared with ice hockey players.Conclusions. The study results indicate that intensive sport-specific training may extend young athletes′ motor coordination characteristics in the ability areas representative of the sport in which they engage.

Preadaptation and spatial effects on retention-tree survival in cut areas in Estonia

2008 ◽  
Vol 38 (10) ◽  
pp. 2616-2625 ◽  
Author(s):  
Raul Rosenvald ◽  
Asko Lõhmus ◽  
Andres Kiviste
Keyword(s):  
Natural Disturbance ◽  
Forest Edge ◽  
Forest Site ◽  
Spatial Effects ◽  
Forest Edges ◽  
Dead Trees ◽  
Tree Survival ◽  
Tree Retention ◽  
Standing Dead ◽  
Retention Trees

Survival of live retention trees is a key issue for stand-scale applications of natural-disturbance-based silviculture. We explored the survival of 3255 trees in 102 cut areas (mean size 2.3 ha) in Estonia for 6 years, focusing on spatial variation and preadaptation of the trees. Altogether, 35% of the trees died during the study period, contributing 4.4 m3 of downed dead trunks and 1 m3 of standing dead trees per hectare. The annual mortality rates declined over time. The main survival determinants were tree species (higher for hardwood deciduous trees), diameter (species dependent), position relative to forest edge (higher for trees near current or former forest edges), retention density (positive), and exposure (negative). The results suggest that (1) green-tree retention can effectively increase the abundance of large shade-tolerant trees, but it is equally important for producing deadwood; (2) larger individuals, former interior-forest trees near current forest edges, and preadapted trees in open conditions should be preferably retained; (3) there is no obvious necessity to modify tree-retention techniques for tree survival according to geographical region or forest site type.

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