2024-03-28T10:41:21Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1609712018-07-17T08:53:03Zcom_10261_88com_10261_8col_10261_341
DIGITAL.CSIC
author
Payo-Payo, Ana
author
Sanz-Aguilar, Ana
author
Genovart, Meritxell
author
Bertolero, Albert
author
Piccardo, Julia
author
Camps, D.
author
Ruiz-Olmo, J.
author
Oro, Daniel
2018-02-20T07:47:29Z
2018-02-20T07:47:29Z
2018
Scientific Reports 8 : 1971 (2018)
2045-2322
http://hdl.handle.net/10261/160971
2045-2322
Predators are an important ecological and evolutionary force shaping prey population dynamics. Ecologists have extensively assessed the lethal effects of invasive predators on prey populations. However, the role of non-lethal effects, such as physiological stress or behavioural responses like dispersal, has been comparatively overlooked and their potential population effects remain obscure. Over the last 23 years, we developed a mark-recapture program for the Audouin’s gull and an intensive carnivore monitoring program to assess how the appearance and invasion of the study site by carnivores affects population dynamics. We evaluate changes in turnover of discrete breeding patches within the colony, age structure and breeding performance. Once carnivores entered the colony, the number of occupied patches increased, indicating a higher patch turnover. Breeders responded by moving to areas less accessible to carnivores. More importantly, the presence of carnivores caused differential (and density-independent) breeding dispersal: experienced, better-performing breeders were more likely to leave the colony than younger breeders. This differential dispersal modified the age structure and reduced the reproductive performance of the population. Our results confirm the importance experience in the study of populations. The role of differential dispersal for animal population dynamics might be more important than previously thought, especially under scenarios of global change.
eng
openAccess
Predator arrival elicits differential dispersal, change in age structure and reproductive performance in a prey population
artĂculo
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URL
https://digital.csic.es/bitstream/10261/160971/1/Payo-Payo%202018.pdf
File
MD5
326f7111da69083d43c5fecfcf8dbc78
1526173
application/pdf
Payo-Payo 2018.pdf