РОЛЬ ЕКОЛОГІЧНИХ ФАКТОРІВ У ФОРМУВАННІ ПСЕВДОМЕЙОБЕНТОСУ (TEMPORARY MEIOFAUNA) ОДЕСЬКОГО РЕГІОНУ ЧОРНОГО МОРЯ

An analysis of long-term studies has made it possible to characterize the formation density of pseudomeiobenthos (temporary meiofauna) settlements depending on the substrate, depth, and seasons of the year in the Odessa Sea region of the northwestern Black Sea by the example of oligochaetes, polychaetes and juvenile mollusks. Their largest accumulations (the total density of settlements was 30865.8±5384.3 ind m-2) are characteristic of the ground sand/shell, the smallest for silty substrate (averaged 11705.5±1337.8 ind.m-2). The maximum indices of the total number of temporary meiofauna were recorded on depth of 10-15 m (20826.3±5010.4 ind.m-2). As shown by long-term studies, the average indicators of the total number of meiobenthos are highest in the winter period. The same applies to the density of the temporary component.

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Immediate and Delayed Effects of Severe Winds on an Old-Growth Forest in Kentucky: A Forty-Year Retrospective

Forests ◽

10.3390/f10030271 ◽

2019 ◽

Vol 10 (3) ◽

pp. 271 ◽

Cited By ~ 1

Author(s):

Susan Jones-Held ◽

Michael Held ◽

Joe Winstead ◽

William Bryant

Keyword(s):

Sugar Maple ◽

Forest Canopy ◽

Basal Area ◽

The United States ◽

Tree Regeneration ◽

Forest Recovery ◽

Total Density ◽

Old Growth Forest ◽

Long Term Studies

Wind disturbance is an important factor that can affect the development of the forests of the Central Hardwood Region of the United States. However, there have been few long-term studies of the recovery of these systems following wind damage. Long-term studies of protected forest systems, such as Dinsmore Woods in Northern Kentucky, within the fragmented forest of this region are valuable as they provide a resource to document and understand the effect of both abiotic and biotic challenges to forest systems. This study is a 40-year analysis of both overstory and understory changes in the forest system at Dinsmore Woods as the result of damage caused by severe winds in the spring of 1974. The forest was surveyed before and immediately following the windstorm and then at 10-year intervals. Although the windstorm had an immediate effect on the forest, the pattern of damage was complex. The forest canopy (diameter at breast height (DBH) ≥ 30 cm) experienced an irregular pattern of damage while in the subcanopy (DBH ≤ 30 cm) there was a 25% reduction in total basal area. However, the major effects of the windstorm were delayed and subsequently have altered forest recovery. Ten years following the disturbance declines were seen in total density and basal area in the canopy and subcanopy of the forest as a consequence of windstorm damage. In the past 20 years the total basal area of the canopy has increased and exceeds the pre-disturbance total basal area. In contrast, the subcanopy total basal area continued to decline 20 years post-disturbance and has not recovered. Further openings in the canopy and subcanopy due to the delayed windstorm effects helped to establish a dense understory of native shrubs and sugar maple which have affected tree regeneration and is reflected in the continual decline in species diversity in the subcanopy and sapling strata over the 40-year period.

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Implications of Long-Term Studies of Three Model Preschool Programs for Head Start

PsycEXTRA Dataset ◽

10.1037/e584762012-007 ◽

2008 ◽

Author(s):

Lawrence J. Schweinhart ◽

Elena V. Malofeeva ◽

Lawrence J. Schweinhart ◽

Michelle M. Englund ◽

Arthur J. Reynolds ◽

...

Keyword(s):

Head Start ◽

Preschool Programs ◽

Long Term Studies

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Primary varicose veins

Phlebologie ◽

10.1055/s-0037-1622305 ◽

2010 ◽

Vol 39 (03) ◽

pp. 133-137

Author(s):

H. Partsch

Keyword(s):

Varicose Veins ◽

Compression Therapy ◽

Daily Practice ◽

Clinical Severity ◽

Compression Stockings ◽

Primary Varicose Veins ◽

The Cost ◽

Convincing Data ◽

Long Term Studies

SummaryBackground: Compression stockings are widely used in patients with varicose veins. Methods: Based on published literature three main points are discussed: 1. the rationale of compression therapy in primary varicose veins, 2. the prescription of compression stockings in daily practice, 3. studies required in the future. Results: The main objective of prescribing compression stockings for patients with varicose veins is to improve subjective leg complaints and to prevent swelling after sitting and standing. No convincing data are available concerning prevention of progression or of complications. In daily practice varicose veins are the most common indication to prescribe compression stockings. The compliance depends on the severity of the disorder and is rather poor in less severe stages. Long-term studies are needed to proof the cost-effectiveness of compression stockings concerning subjective symptoms and objective signs of varicose veins adjusted to their clinical severity. Conclusion: Compression stockings in primary varicose veins are able to improve leg complaints and to prevent swelling.

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Diatoms and aquatic palynomorphs in the sediments of the Eurasian Arctic seas and their significance for paleooceanological investigations in the Arctic

Issues of modern algology (Вопросы современной альгологии) ◽

10.33624/2311-0147-2019-2(20)-246-251 ◽

2019 ◽

pp. 246-251

Author(s):

Yelena I. Polyakova ◽

Yekaterina I. Novichkova ◽

Tatiana S. Klyuvitkina ◽

Elizaveta A. Agafonova ◽

Irina M. Kryukova

Keyword(s):

Bering Sea ◽

Surface Sediments ◽

Sea Water ◽

The Arctic ◽

Marginal Filter ◽

Arctic Seas ◽

Hydrological Parameters ◽

The Arctic Ocean ◽

Long Term Studies

Presented the results of long-term studies of diatoms and aquatic palynomorphs in surface sediments of the Arctic seas and the possibility of their use for the reconstructions of paleocirculation water masses, advection of Atlantic and Bering sea water into the Arctic ocean, changes in the river runoff to the seas, sedimentary processes in the marginal filter of the largest rivers, seasonal sea ice cover and other hydrological parameters.

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Metabolic Responses of Black Sea Fishes to Long-Term Experimental Hypoxia

Hydrobiological Journal ◽

10.1615/hydrobj.v39.i3.20 ◽

2003 ◽

Vol 39 (3) ◽

pp. 18-27 ◽

Cited By ~ 1

Author(s):

G. Ye. Shulman ◽

A. Ya. Stolbov ◽

A. A. Soldatov ◽

G. S. Minyuk ◽

Ye. V. Ivleva ◽

...

Keyword(s):

Black Sea ◽

Metabolic Responses

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Aspects of the Evolution of the Romanian Tourists’ Preferences Concerning the Domestic Tourist Destinations

Valahian Journal of Economic Studies ◽

10.2478/vjes-2019-0002 ◽

2019 ◽

Vol 10 (1) ◽

pp. 21-28

Author(s):

Aniela Bălăcescu ◽

Radu Șerban Zaharia

Keyword(s):

Logistic Model ◽

Local Level ◽

Medium Term ◽

Tourist Destinations ◽

Tourism Management ◽

Production And Consumption ◽

On Line ◽

The One ◽

Long Term Studies

Abstract Tourist services represent a category of services in which the inseparability of production and consumption, the inability to be storable, the immateriality, and last but not least non-durability, induces in tourism management a number of peculiarities and difficulties. Under these circumstances the development of medium-term strategies involves long-term studies regarding on the one hand the developments and characteristics of the demand, and on the other hand the tourist potential analysis at regional and local level. Although in the past 20 years there has been tremendous growth of on-line booking made by household users, the tour operators agencies as well as those with sales activity continue to offer the specific services for a large number of tourists, that number, in the case of domestic tourism, increased by 1.6 times in case of the tour operators and by 4.44 times in case of the agencies with sales activity. At the same time, there have been changes in the preferences of tourists regarding their holiday destinations in Romania. Started on these considerations, paper based on a logistic model, examines the evolution of the probabilities and scores corresponding to the way the Romanian tourists spend their holidays on the types of tourism agencies, actions and tourist areas in Romania.

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Planning a system of permanent sample plots for integrated long-term studies of community-based forest management

Banko Janakari ◽

10.3126/banko.v16i2.965 ◽

1970 ◽

Vol 16 (2) ◽

pp. 3-11 ◽

Cited By ~ 10

Author(s):

H Meilby ◽

L Puri ◽

M Christensen ◽

S Rayamajhi

Keyword(s):

Forest Management ◽

Key Words ◽

Research Note ◽

Managed Forests ◽

Community Based ◽

Permanent Sample Plots ◽

Long Term Studies

To monitor the development of four community-managed forests, networks of permanent sample plots were established in 2005 at sites in Chitwan, Kaski and Mustang Districts, Nepal. This research note documents the procedures used when preparing for establishment of the plot networks, evaluates the applied stratification of the forest on the basis of data gathered in pilot surveys conducted in the early 2005, and provides a discussion on the implications of the choices made. Key words: Community-managed forests; permanent sample plots; stratification; allocation; estimates Banko Janakari Vol.16(2) 2006 pp.3-11

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Oithona davisae: naturalization in the Black sea, inter-annual and seasonal dynamics, effect on the structure of the planktonic copepod community

Океанология ◽

10.31857/s0030-15745961008-1015 ◽

2019 ◽

Vol 59 (6) ◽

pp. 1008-1015

Author(s):

A. D. Gubanova ◽

O. A. Garbazey ◽

D. A. Altukhov ◽

V. S. Mukhanov ◽

E. V. Popova

Keyword(s):

Black Sea ◽

Coastal Waters ◽

Native Species ◽

Significant Decline ◽

Acartia Tonsa ◽

The Black Sea ◽

Copepod Community ◽

Oithona Davisae ◽

Sevastopol Bay

Long-term (20032014) routine observations of zooplankton in Sevastopol Bay (the Black Sea) have allowed the naturalization of the invasive copepod Oithona davisae to be studied in the Black Sea coastal waters. Inter-annual and seasonal variability of the species and their impact on the native copepod community have been analyzed. The invasion of O. davisae and their undoubted dominance in terms of abundance were shown to alter the community structure but, at the same time, the abundances of the native species did not decrease, excepting the Black Sea earlier invader Acartia tonsa. A significant decline in A. tonsa numbers over the stages of O. davisae establishment and naturalization provided evidence of competition between the species. O. davisae have been demonstrated to gain competitive advantage over A. tonsa, that ensured their fast dispersal in the Black Sea, acclimatization in the new habitat and the successful competition over native species.

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