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Drivers of population change in common farmland birds in Germany
Bird Conservation International ( IF 1.6 ) Pub Date : 2020-01-14 , DOI: 10.1017/s0959270919000480
MALTE BUSCH , JAKOB KATZENBERGER , SVEN TRAUTMANN , BETTINA GERLACH , RAINER DRÖSCHMEISTER , CHRISTOPH SUDFELDT

SummaryFarmland bird populations in Germany are declining at a higher speed than species inhabiting other habitats. We studied potential causes for bird population changes based on data from standardised German breeding bird monitoring schemes. We related population trends to covariates describing the changes in the agricultural landscape in Germany, weather conditions during the breeding season and for some migratory species, conditions at stopover and wintering sites. Linear mixed effect models were used to analyse effect strength at species level and conclusions are drawn for the overall group of farmland bird species. The area of grassland and fallow land was shown to have the strongest positive effects and the area of maize and rapeseed the strongest negative effects on farmland bird population trends. The results obtained also indicate that despite the consistent influence of weather conditions during the breeding season, land-use changes had a stronger impact on bird populations than weather. Conditions at Sahel wintering sites did not show a consistent effect on population trends. Based on these findings the study quantitatively underpins and ranks key factors shaping farmland bird populations in Germany.

中文翻译:

德国常见农田鸟类种群变化的驱动因素

摘要德国的农田鸟类数量正在以比栖息在其他栖息地的物种更快的速度下降。我们根据标准化德国种鸟监测计划的数据研究了鸟类种群变化的潜在原因。我们将人口趋势与描述德国农业景观变化的协变量联系起来,繁殖季节和一些迁徙物种的天气条件,中途停留和越冬地点的条件。线性混合效应模型用于分析物种水平的效应强度,并得出整个农田鸟类物种的结论。草地和休耕地面积对农田鸟类种群趋势的正面影响最强,玉米和油菜面积对农田鸟类种群趋势的负面影响最强。获得的结果还表明,尽管在繁殖季节天气条件的持续影响,土地利用变化对鸟类种群的影响比天气更大。萨赫勒越冬地点的条件并未显示出对人口趋势的一致影响。基于这些发现,该研究定量地支持和排列了影响德国农田鸟类种群的关键因素。
更新日期:2020-01-14
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