scholarly journals Ecological Tourism Opportunities in the Area of Ognyanovo Dam

2021 ◽  
Vol 6 ◽  
pp. 1-6
Author(s):  
Adelina Savova ◽  
Ralitza Berberova
Keyword(s):  
Bird Migration ◽  
Migration Routes ◽  
Ecological Tourism

The dam of Ognyanovo is located in the Eastern Sofia Plain, only 40 km awayfrom the capital of Bulgaria. It is one of the country’s most beautiful places – full of biodiversity,especially as regards avifauna species. An important factor which makes the dam a special object ofscientific and tourist interest is its location on one of the main bird migration routes: the ViaAristotelis.For three consecutive years, the area’s fauna potential has been studied andsignificant biodiversity has been identified.This study aims to explore the opportunities for ecotourism development there.

scholarly journals Saint-Petersburg Region in the system of bird migration routes in the Western Palearctic

2015 ◽  
pp. 45
Author(s):  
Георгий Александрович Носков ◽  
Татьяна Адольфовна Рымкевич ◽  
Georgy Noskov ◽  
Tatiana Rymkevich
Keyword(s):  
Bird Migration ◽  
Migration Routes ◽  
Saint Petersburg ◽  
Western Palearctic ◽  
Petersburg Region

scholarly journals Converging migration routes of Eurasian hobbies Falco subbuteo crossing the African equatorial rain forest

2008 ◽  
Vol 276 (1657) ◽  
pp. 727-733 ◽  
Author(s):  
Roine Strandberg ◽  
Raymond H.G Klaassen ◽  
Mikael Hake ◽  
Patrik Olofsson ◽  
Thomas Alerstam
Keyword(s):  
Southern Africa ◽  
Rain Forest ◽  
Large Scale ◽  
Bird Migration ◽  
Satellite Telemetry ◽  
Flight Distance ◽  
Migration Routes ◽  
Restricted Area ◽  
Migration Systems

Autumn migration of adult Eurasian hobbies Falco subbuteo from Europe to southern Africa was recorded by satellite telemetry and observed routes were compared with randomly simulated routes. Two non-random features of observed routes were revealed: (i) shifts to more westerly longitudes than straight paths to destinations and (ii) strong route convergence towards a restricted area close to the equator (1° S, 15° E). The birds migrated south or southwest to approximately 10° N, where they changed to south-easterly courses. The maximal spread between routes at 10° N (2134 km) rapidly decreased to a minimum (67 km) close to the equator. We found a striking relationship between the route convergence and the distribution of continuous rainforest, suggesting that hobbies minimize flight distance across the forest, concentrating in a corridor where habitat may be more suitable for travelling and foraging. With rainforest forming a possible ecological barrier, many migrants may cross the equator either at 15° E, similar to the hobbies, or at 30–40° E, east of the rainforest where large-scale migration is well documented. Much remains to be understood about the role of the rainforest for the evolution and future of the trans-equatorial Palaearctic-African bird migration systems.

scholarly journals Modern application and prospects of the stable isotopes  method for studying avian influenza A virus transmission   in migratory birds

2019 ◽  
Vol 14 (3) ◽  
pp. 92-100
Author(s):  
O. R. Druzyaka ◽  
A. V. Druzyaka ◽  
M. A. Gulyaeva ◽  
F. Huettmann ◽  
A. M. Shestopalov
Keyword(s):  
Stable Isotopes ◽  
Avian Influenza ◽  
Influenza A Virus ◽  
Influenza A ◽  
Bird Migration ◽  
Migratory Birds ◽  
Influenza Viruses ◽  
Migration Routes ◽  
Viral Pathogen ◽  
Avian Influenza A Virus

Aim. The circulation and transmission of pathogens is a global biological phenomenon that is closely associated with bird migration. This analysis was carried out with  the aim of understanding and assessing the prospects of using the stable isotope  method to study the circulation and transmission of the avian influenza A virus via  migratory birds. Discussion. Insufficient data on the distances of migration of infected birds and their  interpopulational relationships leaves open the question of the transmission of highly pathogenic influenza viruses (HSV) in the wild bird population. A deeper study of  the role of migrations in the spread of HSV may possibly allow the more effective  investigation of the transmission of the viral pathogen between individuals at migration stopover sites and the clarification of global migration routes. New methodological approaches are providing a more complete picture of the geography and phenology of migrations, as well as of the consequences of migratory behavior for species biology. The study of the quantitative component of migratory flows based on  the analysis of the content of stable isotopes (SIMS) in bird tissues seems very promising. This method is being applied to the solution of various environmental issues,  including the study of animal migrations.   Conclusion. Based on data from the scientific literature, it is shown that SIMS is  promising for the clarification of bird migration routes and the quantification of their  intensity. The resolving power of the method is sufficient to determine the migration  pathways of carriers of viral pathogens on the scale of zoogeographic subdomains  and in even further detail. However, to date, there have been few such studies: in  Russia they have not been conducted at all. The increased use of the SIMS methodology may possibly reveal new ways in which viral infections are spread via birds.  

scholarly journals Birds of three worlds: moult migration to high Arctic expands a boreal-temperate flyway to a third biome

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Antti Piironen ◽  
Antti Paasivaara ◽  
Toni Laaksonen
Keyword(s):  
Bird Migration ◽  
High Arctic ◽  
The Arctic ◽  
Migratory Connectivity ◽  
Migration Routes ◽  
Arctic Ecosystems ◽  
Long Distance ◽  
Novaya Zemlya ◽  
Bean Goose ◽  
Moult Migration

Abstract Background Knowledge on migration patterns and flyways is a key for understanding the dynamics of migratory populations and evolution of migratory behaviour. Bird migration is usually considered to be movements between breeding and wintering areas, while less attention has been paid to other long-distance movements such as moult migration. Methods We use high-resolution satellite-tracking data from 58 taiga bean geese Anser fabalis fabalis from the years 2019–2020, to study their moult migration during breeding season. We show the moulting sites, estimate the migratory connectivity between the breeding and the moulting sites, and estimate the utilization distributions during moult. We reveal migration routes and compare the length and timing of migration between moult migrants and successful breeders. Results All satellite-tracked non-breeding and unsuccessfully breeding taiga bean geese migrated annually to the island of Novaya Zemlya in the high Arctic for wing moult, meaning that a large part of the population gathers at the moulting sites outside the breeding range annually for approximately three months. Migratory connectivity between breeding and moulting sites was very low (rm =  − 0.001, 95% CI − 0.1562–0.2897), indicating that individuals from different breeding grounds mix with each other on the moulting sites. Moult migrants began fall migration later in autumn than successful breeders, and their overall annual migration distance was over twofold compared to the successful breeders. Conclusions Regular moult migration makes the Arctic an equally relevant habitat for the taiga bean goose population as their boreal breeding and temperate wintering grounds, and links ecological communities in these biomes. Moult migration plays an important role in the movement patterns and spatio-temporal distribution of the population. Low migratory connectivity between breeding and moulting sites can potentially contribute to the gene flow within the population. Moult migration to the high Arctic exposes the population to the rapid impacts of global warming to Arctic ecosystems. Additionally, Novaya Zemlya holds radioactive contaminants from various sources, which might still pose a threat to moult migrants. Generally, these results show that moult migration may essentially contribute to the way we should consider bird migration and migratory flyways.

scholarly journals Aspects Regarding Raptors Migration over the Black Sea

2017 ◽  
Vol 60 (2) ◽  
pp. 517-536
Author(s):  
Cătălin-Răzvan Stanciu ◽  
Răzvan Zaharia ◽  
Gabriel-Bogdan Chişamera ◽  
Ioana Cobzaru ◽  
Viorel-Dumitru Gavril ◽  
...  
Keyword(s):  
Black Sea ◽  
Bird Migration ◽  
Migratory Birds ◽  
The Black Sea ◽  
Complex Task ◽  
Migration Routes ◽  
Large Water ◽  
Offshore Oil ◽  
Management And Conservation ◽  
Insight Into

Abstract We investigated diurnal raptors movements in the Black Sea basin. Bird migration over the western Black Sea has not been studied properly, scarce data being available mainly by Drost’s paper (1930) thus referring only to the birds from Snakes Island, and few new data collected during more recent research expeditions. The study of migration over large water bodies is a very complex task, due to the difficulty of reaching these areas; observations in this paper were made from research vessels and offshore oil rigs. Our data together with previously published information provides a new insight into bird migration routes over the Black Sea. Species observed across the Black Sea basin followed routes that are part of Via Pontica Corridor and Trans-Caucasian Corridor. The aim of this paper is to have a clearer image of the migration phenomenon in this area, such data are important for management and conservation of migratory birds.

scholarly journals Bird Migration Routes and Risk for Pathogen Dispersion into Western Mediterranean Wetlands

2007 ◽  
Vol 13 (3) ◽  
pp. 365-372 ◽  
Author(s):  
Elsa Jourdain ◽  
Michel Gauthier-Clerc ◽  
Dominique Bicout ◽  
Philippe Sabatier
Keyword(s):  
Bird Migration ◽  
Western Mediterranean ◽  
Migration Routes ◽  
Mediterranean Wetlands

scholarly journals Autumn migration of soaring birds in North Dobrogea, Romania: a study with implications for wind farm development

2012 ◽  
Vol 20 (2) ◽  
pp. 73-85 ◽  
Author(s):  
Attila Fülöp ◽  
Lőrinc Bărbos ◽  
Gábor M. Bóné ◽  
Szilárd J. Daróczi ◽  
Luca A. Dehelean ◽  
...  
Keyword(s):  
Wind Farm ◽  
Bird Migration ◽  
Negative Impact ◽  
Significant Proportion ◽  
Wind Farms ◽  
Local Scale ◽  
Autumn Migration ◽  
Migration Routes ◽  
Soaring Birds ◽  
Energy Exploitation

Abstract In Dobrogea, a core area for wind energy exploitation in Romania, existing knowledge regarding the intensity and pattern of bird migration is limited. In the absence of enumerated data, wind farms may be constructed in areas where large aggregations of migrants pass. In this study we recorded the intensity of the autumn migration of soaring birds in three locations within the Măcin Mountains, where wind farms are planned to be built. The locations chosen were at Văcăreni, Greci and Cerna villages. Furthermore we categorized all migrating individuals as threatened or non-threatened by the planned wind farms, based on their migration routes and height at local scale. At Văcăreni 4.716 individuals were counted, 3.394 raptors and 1.322 non-raptors, at Greci 2.387 individuals, 2.064 raptors and 323 non-raptors, and finally at Cerna, 5.268 individuals, 4.529 raptors and 739 non-raptors. At all three sites a significant proportion of birds, both raptors and non-raptors, were found to be threatened by the proposed wind farms. At Văcăreni 68.33% of raptors and 84.95% of non-raptors were at threat, at Greci 44.48% and 54.18% respectively, and at Cerna 59.37% and 94.86%. As such we conclude that intensive migration occurs in North Dobrogea and wind farms would have a considerable negative impact on migrants in the studied areas

Selection of a leading edge noise prediction method for PNoise

2018 ◽  
pp. 214-223
Author(s):  
AM Faria ◽  
MM Pimenta ◽  
JY Saab Jr. ◽  
S Rodriguez
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Prediction Method ◽  
Leading Edge ◽  
Wind Farms ◽  
Broadband Noise ◽  
Turbulence Energy ◽  
Noise Prediction ◽  
Migration Routes ◽  
Turbulent Inflow

Wind energy expansion is worldwide followed by various limitations, i.e. land availability, the NIMBY (not in my backyard) attitude, interference on birds migration routes and so on. This undeniable expansion is pushing wind farms near populated areas throughout the years, where noise regulation is more stringent. That demands solutions for the wind turbine (WT) industry, in order to produce quieter WT units. Focusing in the subject of airfoil noise prediction, it can help the assessment and design of quieter wind turbine blades. Considering the airfoil noise as a composition of many sound sources, and in light of the fact that the main noise production mechanisms are the airfoil self-noise and the turbulent inflow (TI) noise, this work is concentrated on the latter. TI noise is classified as an interaction noise, produced by the turbulent inflow, incident on the airfoil leading edge (LE). Theoretical and semi-empirical methods for the TI noise prediction are already available, based on Amiet’s broadband noise theory. Analysis of many TI noise prediction methods is provided by this work in the literature review, as well as the turbulence energy spectrum modeling. This is then followed by comparison of the most reliable TI noise methodologies, qualitatively and quantitatively, with the error estimation, compared to the Ffowcs Williams-Hawkings solution for computational aeroacoustics. Basis for integration of airfoil inflow noise prediction into a wind turbine noise prediction code is the final goal of this work.

A bibliography for John Bachman

2005 ◽  
Vol 32 (1) ◽  
pp. 47-63
Author(s):  
G. Waddell
Keyword(s):  
North America ◽  
Natural History ◽  
Bird Migration ◽  
Wild Plants ◽  
Human Race ◽  
John James Audubon ◽  
The Reformation

John Bachman (1790–1874) was co-author with John James Audubon of The viviparous quadrupeds of North America (1842–1848). His other major books were The doctrine of the unity of the human race examined on the principles of science (1850) and A defense of Luther and the Reformation (1853). He wrote approximately 70 articles on topics ranging from religion to natural history including scientifi c methodology, wild plants, variation in domesticated plants and animals, hybrids, agriculture, bird migration and animal markings.

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