Baltic Seabirds Transect Surveys
Entry ID:
seamap358
|
Summary
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
Multimedia Sample
View full image
Caption:
Seabird Transect Surveys
|
|
Geographic Coverage
Spatial coordinates
N: 58.88 |
|
S: 54.83 |
|
E: 24.36 |
|
W: 17.69 |
|
Data Set Citation
Dataset 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 data
Online Resource:
http://www.ekoi.lt/
|
Temporal Coverage
Start Date:
1992-10-18
Stop Date:
1999-03-08
|
Location Keywords
Data Resolution
Latitude Resolution:
0.000167 Decimal degrees
Longitude Resolution:
0.000167 Decimal degrees
Horizontal Resolution Range:
1 meter - < 30 meters
|
Science Keywords
ISO Topic Category
Platform
Project
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.
Ancillary Keywords
Data Set Progress
Data Center
Distribution
Distribution Format:
Shapefile
|
Personnel
EI
FUJIOKA
Role:
TECHNICAL CONTACT
Role:
DIF AUTHOR
Phone:
919-613-8021
Fax:
919-684-8741
Email:
efujioka at duke.edu
Contact Address:
LSRC A321
Box 90328
City:
Durham
Province or State:
NC
Postal Code:
27708
Country:
USA
GEDIMINAS
VAITKUS
Role:
TECHNICAL CONTACT
Phone:
+37052729251
Email:
gedas at ekoi.lt
Contact Address:
Akademijos str. 2
City:
Vilnius
Postal Code:
LT08412
Country:
Lithuania
|
Related URL
Link:
GET DATA
Link:
GET DATA
Description:
Access data from the OBIS and OBIS-SEAMAP websites.
|
Publications/References
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. http://www.ekoi.lt/uploads/docs/VaitkusAZL%2011_273-279.pdf
Creation and Review Dates
DIF Creation Date:
2008-01-11
Last DIF Revision Date:
2009-01-21
|
|