TY  - STD
AU  - Maud Quéroué, Christophe Barbraud
PY  - 2021//
TI  - Multispecies integrated population model reveals bottom-up dynamics in a seabird predator–prey system
KW  - Bayesian inference demography environmental variation integrated population model matrix population model Nimble predator–prey interactions
N2  - Assessing the effects of climate and interspecific relationships on communities is challenging because of the complex interplay between species population dynamics, their interactions, and the need to integrate information across several biological levels (individuals, populations, communities). Usually used to quantify single-species demography, integrated population models (IPMs) have recently been extended to communities. These models allow fitting multispecies matrix models to data from multiple sources while simultaneously accounting for uncertainty in each data source. We used multispecies IPMs accommodating climatic variables to quantify the relative contribution of climate vs. interspecific interactions on demographic parameters, such as survival and breeding success, in the dynamics of a predator–prey system. We considered a stage-structured predator–prey system combining 22 yr of capture–recapture data and population counts of two seabirds, the Brown Skua (Catharacta lönnbergi) and its main prey the Blue Petrel (Halobaena caerulea), both breeding on the Kerguelen Islands in the Southern Ocean. Our results showed that climate and predator–prey interactions drive the demography of skuas and petrels in different ways. The breeding success of skuas appeared to be largely driven by the number of petrels and to a lesser extent by intraspecific density dependence. In contrast, there was no evidence of predation effects on the demographic parameters of petrels, which were affected by oceanographic factors. We conclude that bottom-up mechanisms are the main drivers of this skua–petrel system.
SN  - 1557-7015
L1  - http://publi.ipev.fr/polar_references/files/yes
UR  - http://dx.doi.org/10.1002/ecm.1459
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=8210), last updated on Tue, 30 Nov 1999 00:00:00 +0100
ID  - MaudQueroue2021
ER  -