Long-term declines of European insectivorous bird populations and potential causes

© 2019 Society for Conservation Biology.

Bibliographische Detailangaben
Veröffentlicht in:Conservation biology : the journal of the Society for Conservation Biology. - 1989. - 33(2019), 5 vom: 27. Okt., Seite 1120-1130
1. Verfasser: Bowler, Diana E (VerfasserIn)
Weitere Verfasser: Heldbjerg, Henning, Fox, Anthony D, de Jong, Maaike, Böhning-Gaese, Katrin
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Conservation biology : the journal of the Society for Conservation Biology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't agricultural intensification bioindicadores bioindicators cambio climático climate change declinaciones de insectos insect declines intensificación agrícola mehr... population trends tendencias poblacionales
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520 |a Evidence of declines in insect populations has recently received considerable scientific and societal attention. However, the lack of long-term insect monitoring makes it difficult to assess whether declines are geographically widespread. By contrast, bird populations are well monitored and often used as indicators of environmental change. We compared the population trends of European insectivorous birds with those of other birds to assess whether patterns in bird population trends were consistent with declines of insects. We further examined whether declines were evident for insectivores with different habitats, foraging strata, and other ecological preferences. Bird population trends were estimated for Europe (1990-2015) and Denmark (1990-2016). On average, insectivores declined over the study period (13% across Europe and 28% in Denmark), whereas omnivores had stable populations. Seedeaters also declined (28% across Europe; 34% in Denmark), but this assessment was based on fewer species than for other groups. The effects of insectivory were stronger for farmland species (especially grassland species), for ground feeders, and for cold-adapted species. Insectivory was associated with long-distance migration, which was also linked to population declines. However, many insectivores had stable populations, especially habitat generalists. Our findings suggest that the decline of insectivores is primarily associated with agricultural intensification and loss of grassland habitat. The loss of both seed and insect specialists indicates an overall trend toward bird communities dominated by diet generalists 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a agricultural intensification 
650 4 |a bioindicadores 
650 4 |a bioindicators 
650 4 |a cambio climático 
650 4 |a climate change 
650 4 |a declinaciones de insectos 
650 4 |a insect declines 
650 4 |a intensificación agrícola 
650 4 |a population trends 
650 4 |a tendencias poblacionales 
700 1 |a Heldbjerg, Henning  |e verfasserin  |4 aut 
700 1 |a Fox, Anthony D  |e verfasserin  |4 aut 
700 1 |a de Jong, Maaike  |e verfasserin  |4 aut 
700 1 |a Böhning-Gaese, Katrin  |e verfasserin  |4 aut 
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773 1 8 |g volume:33  |g year:2019  |g number:5  |g day:27  |g month:10  |g pages:1120-1130 
856 4 0 |u http://dx.doi.org/10.1111/cobi.13307  |3 Volltext 
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