Baltic Seabirds Transect SurveysEntry ID: seamap358
Abstract: Seabirds transect surveys were conducted in Baltic Sea from 1992 to 1999.
Purpose: The main purpose of our work was to investigate spatial structure and dynamics of the offshore seabird populations and to assess their status in specific conditions of the Baltic Sea marine ecosystem. The main tasks of our work were the following:
---Study species composition, abundance and spatial distribution of seabird populations in different seasons of the year, distinguish dominating ... species and the most important seabird concentration areas in the eastern Baltic;
---Study community structure of inter-specific assemblages and ecological adaptations of wintering seabird populations;
---Study the processes of spatial dynamics and trends of spatial structure in regional seabird populations within the gradient of winter climatic conditions;
---Study offshore migratory routes and temporary concentration areas of seabirds in the Baltic Proper.
SUPPLEMENTAL INFORMATION: Standard seabird offshore sampling techniques (Tasker et al., 1984; Webb, Durinck, 1992) assume that line transect of 300 m width is basically used for counting birds sitting on the water surface, whereas snap-shot method is used for counting of flying birds at strongly fixed intervals of time. Additional efforts were put into studies of the offshore seabird and waterfowl movements. We recorded flying birds along 1000 m wide transect over the \"classic\" 300 m transect used for calculations of seabird densities during \"snap-shots\".
CURRENTNESS REFERENCE: ground condition
SPATIAL REFERENCE INFORMATION - GEODETIC MODEL
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
Data Set Citation
Dataset Originator/Creator: Institute of Ecology of Vilnius University
Dataset Title: Baltic Seabirds Transect Surveys
Dataset Series Name: OBIS-SEAMAP
Dataset Release Date: 2006-07-14 13:58:45-04
Dataset Release Place: http://seamap.env.duke.edu/
Dataset Publisher: OBIS-SEAMAP
Data Presentation Form: vector digital dataOnline Resource: http://www.ekoi.lt/
This description is a member of a collection. The collection is described in
Start Date: 1992-10-18Stop Date: 1999-03-08
Latitude Resolution: 0.000167 Decimal degrees
Longitude Resolution: 0.000167 Decimal degrees
Horizontal Resolution Range: 1 meter - < 30 meters
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > DUCKS/GEESE/SWANS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > EAGLES/FALCONS/HAWKS AND ALLIES
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > SANDPIPERS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > LOONS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > WADERS/GULLS/AUKS AND ALLIES
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > PERCHING BIRDS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > CRANES AND ALLIES
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > GREBES
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > BIRDS > HERONS/EGRETS AND ALLIES
Access Constraints ACCESS CONSTRAINTS: Open public.
DISTRIBUTION LIABILITY: Not to hold OBIS-SEAMAP liable for errors in the data. While we have made every effort to ensure the quality of the database, we cannot guarantee the accuracy of these datasets. Also please refer to Use Constraints.
Use Constraints 1. Not to use data contained in OBIS-SEAMAP in any publication, product, or commercial application without prior written consent of the original data provider. 2. To cite both the data provider and OBIS-SEAMAP appropriately after approval of use is obtained. 3. Not to hold OBIS-SEAMAP liable for errors in the data. While we have made every effort to ensure the quality of the database, we cannot guarantee the accuracy of these datasets.
Data Set Progress
Distribution Format: Shapefile
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Email: efujioka at duke.edu
LSRC A321 Box 90328
Province or State: NC
Postal Code: 27708
Role: TECHNICAL CONTACT
Email: gedas at ekoi.lt
Akademijos str. 2
Postal Code: LT08412
Vaitkus G. 2001. Spatial dynamics of regional wintering populations of seabirds in the gradient of wintering climatic conditions. Acta Zoologica Lituanica. 11 (3): 273-279.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2008-01-11
Last DIF Revision Date: 2016-11-18