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Aggregated counts of Gavia spp. from aerial surveys performed during the spring season between 2001 and 2018 in the German North Sea
Citable as data publication
Vilela, R.; Burger, C.; Diederichs, A.; Szostek, L.; Freund, A.; Braasch, A.; Bellebaum, J.; Beckers, B.; Piper, W.; Nehls, G.; BioConsult SH; IBL Umweltplanung; Institut für Angewandte Ökosystemforschung: Germany; (2021): Aggregated counts of Gavia spp. from aerial surveys performed during the spring season between 2001 and 2018 in the German North Sea. Marine Data Archive. https://doi.org/10.14284/474
Contact:
Vilela, Raul Availability:
 This dataset is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.Description
Gavia spp. count data acquired from aerial surveys performed between 2001 and 2018 during the spring season on the German North Sea. more
Data was provided by: BioConsult SH GmbH & Co. KG, IBL Umweltplanung GmbH, Institut für angewandte Ökosystemforschung GmbH, and the Federal Agency for Nature Conservation (BfN). For each year, spring (from 1st March until 15th May), aerial data from different sources was aggregated by mesh node (5km resolution) and type of survey: Digital (HiDef, APEM, DAISI) or conventional. Conventional aerial data is already corrected for distance sampling. Data is stored as a "Large SpatialPointsDataFrame" in rds format to be opened using R software. The ZIP file contains two rds files: 1. diver_counts_2001_2018_spring.rds: the main dataset with the aggregated bird counts. 2. mesh_5km.rds: the spatial mesh used to aggregate the counts. Constrained refined Delaunay triangulation spatial mesh a maximum distance between nodes of 5km covering the German North Sea; to be used as support file to construct the model. Code: readRDS(file="mesh_5km.rds"). Coordinate system: UTM32N (EPSG:32632) "+init=epsg:32632 +proj=utm +zone=32+datum=WGS84 +units=km +no_defs + ellps=WGS84 +towgs84=0,0,0" Scope Themes: Biology > Birds Keywords: Marine/Coastal, Black-throated loon, Red-throated loon, ANE, Germany, German part of the North Sea, Gavia arctica (Linnaeus, 1758), Gavia stellata (Pontoppidan, 1763) Geographical coverage ANE, Germany, German part of the North Sea [Marine Regions] Temporal coverage
1 March 2001 - 15 May 2018 Yearly Parameters
Count of birds Methodology
Geographic locations Count of birds: Aerial survey Contributors
Publication
Based on this dataset
Vilela, R. et al. (2020). Divers (Gavia spp.) in the German North Sea: Changes in abundance and effects of offshore wind farms: A study into diver abundance and distribution based on aerial survey data in the German North Sea: Final Report. Version v1.0. BioConsult SH GmbH & Co. KG/IBL Umweltplanung GmbH/Institut für angewandte Ökosystemforschung GmbH: Husum, Oldenburg, Hamburg. 96 pp., more
Dataset status: In Progress
Data type: Data
Data origin: Research: field survey
Metadatarecord created: 2021-04-22
Information last updated: 2021-04-27
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