79 research outputs found
Sandoval_Seres_et_al_2024_Food resource competition between African wild dogs and larger carnivores in an ecosystem with artificial water provision.csv
No full textData used in the publication of Sandoval-Serés E, Mbizah M, Phiri S, Chatikobo SP, Valeix M, van der Meer E, Dröge E, Madhlamoto D, Madzikanda H, Blinston P, Loveridge AJ. In press 2024. Food resource competition between African wild dogs and larger carnivores in an ecosystem with artificial water provision. Ecology and Evolution.</p
Human‐induced landscape of fear promotes coexistence in equids, facilitating the successful reintroduction of Przewalski's horses in the Gobi Desert
No full textInternational audienceResearch Highlight : Cao QL, Zhang Y, Songer M, Leimgruber P, Hu D, Li J, Wang C & Rubenstein DI (2025) Coexistence between Przewalski’s horse and Asiatic wild ass in the desert: the importance of people. Journal of Applied Ecology, https://doi.org/10.1111/1365‐2664.70013 . The human imprint is complex and sometimes unpredictable and surprising. By instilling fear in some species, humans may provide refuges for other species. Using camera‐trap data from 16 water points, Cao et al. originally showed how the coexistence of Przewalski’s horses and Asiatic wild asses in the Dzungarian Gobi is driven by the avoidance of water points near human infrastructures by Asiatic wild asses, which leaves some water points undepleted by the large herds of wild asses roaming in this region. Such finding is of high interest in a context of on‐going efforts for the reintroduction of Przewalski’s horses in the Gobi Desert and of a context of a warmer and drier climate
Insights on the effect of mega-carcass abundance on the population dynamics of a facultative scavenger predator and its prey: data and scripts
No full text<p>This repository contains materiels used for the analysis of the manuscript <strong>Insights on the effect of mega-carcass abundance on the population dynamics of a facultative scavenger predator and its prey</strong> (Sidous M., Cubaynes S., Gimenez O., Drouet-Hoguet N., Dray S., Bollache L., Madhlamoto D., Ngwenya N. A., Fritz H., Valeix M.). It contains raw data (rainfall and annuals counts of mammals), in addition to scripts to format and analyze it.</p>
Cinq siècles de l'histoire d'une parcelle de forêt domaniale de la terre ferme d'Amérique du Sud
No full textUn survol de l'histoire guyanaise des cinq derniers siècles, et de son administration forestière des cinq dernières décennies est suvi de l'exposé des principaux faits scientifiques et économiques concernant la forêt guyanaise. Les perspectives actuelles permettent d'espérer, enfin, une évolution favorable de l'industrie de transformation du bois dans le Départemen
Datasets for the RSF & SSF analyses with associated script to run the models
No full textThe R objects contain the necessary data to run the RSF and SSF analyses using the associated script to run the models.Peer reviewe
Predator Effects on Herbivore Dynamics and Behavior - What Mechanisms Lead to Trophic Cascades in Savannas?
No full textInternational audienc
Predator Effects on Herbivore Dynamics and Behavior - What Mechanisms Lead to Trophic Cascades in Savannas?
No full textInternational audienc
Influence of prey dispersion on territory and group size of African lions: a test of the resource dispersion hypothesis.
No full textEmpirical tests of the resource dispersion hypothesis (RDH), a theory to explain group living based on resource heterogeneity, have been complicated by the fact that resource patch dispersion and richness have proved difficult to define and measure in natural systems. Here, we studied the ecology of African lions Panthera leo in Hwange National Park, Zimbabwe, where waterholes are prey hotspots, and where dispersion of water sources and abundance of prey at these water sources are quantifiable. We combined a 10-year data set from GPS-collared lions for which information of group composition was available concurrently with data for herbivore abundance at waterholes. The distance between two neighboring waterholes was a strong determinant of lion home range size, which provides strong support for the RDH prediction that territory size increases as resource patches are more dispersed in the landscape. The mean number of herbivore herds using a waterhole, a good proxy of patch richness, determined the maximum lion group biomass an area can support. This finding suggests that patch richness sets a maximum ceiling on lion group size. This study demonstrates that landscape ecology is a major driver of ranging behavior and suggests that aspects of resource dispersion limit group sizes
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No full textThe relationship between the spatiotemporal distribution of resources and patterns of sociality is widely discussed. While the resource dispersion hypothesis (RDH) was formulated to explain why animals sometimes live in groups from which they derive no obvious benefits, it has also been successfully applied to species that benefit from group living. Some empirical tests have supported the RDH, but others have not, so conclusions remain equivocal and further research is required to determine the extent to which RDH predictions hold in natural systems. Here, we test four predictions of the RDH in an African lion population in the context of their fission–fusion society. We analyzed data on group composition of GPS‐collared lions and patterns of prey availability. Our results supported the first and second predictions of the RDH: Home range size (a) was independent of group size and (b) increased with distance between encounters with prey herds. Nonetheless, the third and fourth RDH predictions were not supported: (c) The measure of resource heterogeneity and (d) resource patch richness measured through prey herd size and body size had no significant effect on lion group size. However, regarding the fourth prediction, we added an adaptation to account for dynamics of fission–fusion society and found that the frequency of pride fission increased as group size increased. Our data set restricted us from going on to explore the effect of fission–fusion dynamics on the relationship between group size and patch richness. However, this should be investigated in future studies as including fission–fusion dynamics provides a more nuanced, realistic appreciation of lion society. Our study emphasizes the importance of understanding the complexity of a species' behavioral ecology within the framework of resource dispersion. Whatever larger theoretical framework may emerge to explain lion society, incorporating fission–fusion dynamics should allow the RDH to be refined and improved
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