4 Works

Data from: An avian equivalent of selective abortion: post-laying clutch reduction under resource limitation

Janusz Kloskowski
Selective elimination of excess offspring with poor fitness prospects may occur prenatally (selective abortion) or postnatally (brood reduction). Postnatal reduction is the dominant strategy, presumably because surplus progeny serves as a hedge against environmental and developmental uncertainty. In birds, its main proximate mechanism is asynchronous hatching, generating within-brood competitive asymmetry. Here, clutch-size reduction via last-egg abandonment was investigated in the asynchronously hatching red-necked grebe in a study area comprising two human-managed poorly predictable habitats with...

The expansion wave of an invasive predator leaves declining waterbird populations behind

Marcin Brzeziński, Michał Żmihorski, Marek Nieoczym, Piotr Wilniewczyc & Andrzej Zalewski
Aim: Theory predicts that the evolutionary adaptations of prey to reduce predator pressure often fail in confrontation with non-native predators; thus, their predation usually leads to sharp declines of prey populations. However, over time, prey can develop anti-predator adaptations, reduce predator impact and recover its population. We analyse the numerical response of multiple prey species to the impact of a non-native predator on a large spatiotemporal scale. Location: Poland Methods: Long-term population dynamics of 13...

Data from: Contagious fear: escape behaviour increases with flock size in European gregarious birds

Federico Morelli, Yanina Benedetti, Mario Diaz, Tomas Grim, Juan Ibáñez-Álamo, Jukka Jokimäki, Marja-Liisa Kaisanlahti-Jokimäki, Kunter Tätte, Gábor Markó, Yiting Jiang, Piotr Tryjanowski & Anders P. Møller
Flight initiation distance (FID), the distance at which individuals take flight when approached by a potential (human) predator, is a tool for understanding predator-prey interactions. Among the factors affecting FID, tests of effects of group size (i.e. number of potential prey) on FID have yielded contrasting results. Group size or flock size could either affect FID negatively (i.e. the dilution effect caused by the presence of many individuals) or positively (i.e. increased vigilance due to...

Data from: Multispecies invasion reduces the negative impact of single alien plant species on native flora

Magdalena Lenda, Piotr Skórka, Johannes Knops, Michał Żmihorski, Renata Gaj, Dawid Moroń, Michal Woyciechowski & Piotr Tryjanowski
Aim: In the current Anthropocene, many ecosystems are being simultaneously invaded by multiple alien species. Some of these invasive species become more dominant and have greater environmental impacts than others. If two potentially dominant species invade the same area, the combined impact has been reported to be either (1) domination by one species, i.e., the competitive dominance of one invader, or (2) invasion meltdown, where the combined impact is much greater, i.e., a synergistic effect....

Registration Year

  • 2019

Resource Types

  • Dataset


  • University of Life Sciences
  • Polish Academy of Sciences
  • University of Queensland
  • University of Groningen
  • Eötvös Loránd University
  • Spanish National Research Council
  • AgroParisTech
  • University of Warsaw
  • Jagiellonian University
  • University of Tartu