Dataset 768
Farmland bird monitoring data in North-east Germany 1999-2002 and 2013-2015
Realm: Terrestrial
Climate: Temperate
Biome: Temperate broadleaf and mixed forests Central latitude: 53.351030
Central longitude: 13.689030
Duration: 7 years, from 1999 to 2015
Climate: Temperate
Biome: Temperate broadleaf and mixed forests Central latitude: 53.351030
Central longitude: 13.689030
Duration: 7 years, from 1999 to 2015
25174 records
143 distinct species
Across the time series Alauda arvensis is the most frequently occurring speciesMethods
Systematic bird surveys were performed from 1999 to 2002 (first campaign”) and from 2013 to 2015 (second campaign”) within the Quillow-AgroScapeLab”, located in the north-eastern part of the German lowlands (Figure 1).” Bird Observation Data Figure 2 depicts the spatial arrangement of the sample plots in the study area. There was a total of 125 sample plots in five parallel transects. Each transect had a distance of 3000 m to the neighbouring transects; there were 25 sample plots on each transect with a distance of 500 m between neighbouring plots. In the following, the term sample plot” refers to each circular area with an observation point at the centre and a radius of 250 m; the total area of each sample plot is therefore about 20 ha. Depending on the dominant habitat type inside this circular area, the sample plots were classified to the habitat types arable”, grassland”, or forest” (see examples in the Supplementary Material: Figures S1S3). Due to access restrictions, the total number of accessible sample plots varied, but 111 sample plots were visited across all observation dates (Table S2 in the Supplementary Materials). The bird observation datasets for both campaigns are published [15,16]. During the main bird-breeding period, ornithologists with profound local species knowledge conducted bird surveys five times in each year (but only four times in 1999), with intervals of approximately 2 weeks between the surveys. Depending on the variable weather conditions and thus on the beginning of the breeding season, the surveys begun with the first arrivals of the migrant bird species and ended well after the main breeding season. These timings were decided by ornithologists, the dates of the surveys are summarized in Table S13 (Supplementary Materials). All observations were carried out according to the point-stop-count method [17], which involves the recording of individual birds by direct sight and/or hearing within 10 min at the centre of the sample plot. The plots were visited in the morning, starting between 5 and 8 a.m. and finishing not later than 1 p.m. To avoid rough systematic errors, the surveys started at different ends of transects, and the ornithologists occasionally changed which transect they observed over the years. Both bird species and the number of individuals for every detected species were recorded.” [Schultz et al., 2022]Citation(s)
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