Supplementary material from "Phantom of the forest or successful citizen? Analysing how Northern goshawks (Accipiter gentilis) cope with the urban environment"
Version 2 2020-12-17, 11:12
Version 1 2020-12-11, 13:35
Posted on 2020-12-11 - 13:35
By 2040, roughly two-thirds of humanity are expected to live in urban areas. As cities expand, humans irreversibly transform natural ecosystems, creating both opportunities and challenges for wildlife. Here, we investigate how the Northern goshawk (Accipiter gentilis) is adjusting to urban environments. We measured a variety of behavioural and ecological parameters in three urban and four rural study sites. City life appeared related to all parameters we measured. Urban female goshawks were overall 21.7 (CI95% 5.13–130) times more likely to defend their nestlings from humans than rural females. Urban goshawks were 3.64 (CI95% 2.05–6.66) times more likely to feed on pigeons and had diets exhibiting lower overall species richness and diversity. Urban females laid eggs 12.5 (CI95% 7.12–17.4) days earlier than rural individuals and were 2.22 (CI95% 0.984–4.73) times more likely to produce a brood of more than three nestlings. Nonetheless, urban goshawks suffered more from infections with the parasite Trichomonas gallinae, which was the second most common cause of mortality (14.6%), after collisions with windows (33.1%). In conclusion, although city life is associated with significant risks, goshawks appear to thrive in some urban environments, most likely as a result of high local availability of profitable pigeon prey. We conclude that the Northern goshawk can be classified as an urban exploiter in parts of its distribution.
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Merling de Chapa, Manuela; Courtiol, Alexandre; Engler, Marc; Giese, Lisa; Rutz, Christian; Lakermann, Michael; et al. (2020). Supplementary material from "Phantom of the forest or successful citizen? Analysing how Northern goshawks (Accipiter gentilis) cope with the urban environment". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.5237583.v1
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AUTHORS (19)
MM
Manuela Merling de Chapa
AC
Alexandre Courtiol
ME
Marc Engler
LG
Lisa Giese
CR
Christian Rutz
ML
Michael Lakermann
GM
Gerard Müskens
Yv
Youri van der Horst
RZ
Ronald Zollinger
HW
Hans Wirth
NK
Norbert Kenntner
OK
Oliver Krüger
NC
Nayden Chakarov
AM
Anna-Katharina Müller
VL
Volkher Looft
TG
Thomas Grünkorn
AH
André Hallau
RA
Rainer Altenkamp
OK
Oliver Krone