• Ecology in a (rapidly) changing world

    I study how animals perceive and adjust to their environment,

    and why this matters for populations and ecosystems.

    My model of choice: large herbivores. Because you can (relatively) easily monitor their behaviour in natura, and they have important ecosystem effects. Some have high societal and economical values, so my research sometimes matter beyond basic science.

    We (as humans) are making the world's climate different. How this affects organisms is the hottest applied ecological question. I do my share to bring an answer to it.

  • Research outputs

    the most interesting ones, in no specific order!

    Memory-driven movements explain home-range formation, reduce competition, and underlie migration strategies

    Most animals use a limited space compared to what is available to them, i.e. they have well-defined home-ranges. What mechanism leads to such pattern is unknown, although it is hypothesized that memory does play a role. We have recently shown that the use of spatial memory leads to more efficient foraging than other forms of movements and that home-ranges naturally emerge from such memory-driven movements (Riotte-Lambert et al. 2015 Am. Nat.). We have further shown that animals with spatial memory reduce competition pressure by segregating themselves (Riotte-Lambert et al. 2015 Am. Nat.), and that these memory-driven movements could have important implications for the study of density dependence and population regulation (Riotte-Lambert et al. 2017 Proc. Roy. Soc. Lond. B.).

    Another widely-observed movement pattern that is believed to be largely influenced by spatial memory is migration. We have recently described a long (up to 250 km), trans-boundary (between Zimbabwe and Botswana) migration of African elephants (Tshipa et al. 2017 Biol. Cons.) driven by the availability of surface-water, and are investigating the role memory plays in this migration, in the face of unpredictable climate variability.

    Finally, we are currently studying to what extent memory-use, which can lead to predictability in movement, matters in the predator-prey space race (Patin et al. preprint on bioRxiv).

    Spatial predator avoidance is pervasive and occurs at multiple scales

    Animals must go where their food is, but need to compromise with the risk of being predated upon when foraging means being in an unsafe place. This is well known, but surprisingly we don't understand so well the contribution of spatial avoidance vs. other strategies (like vigilance), and most importantly at what scale does this avoidance occur. We are studying this theoretically (Patin et al. 2019 Am. Nat.), but also empirically in various systems. For instance, we have shown that plains zebras move quickly away from lions when they encounter them (Courbin et al. 2016 Oikos), but most importantly move away from waterholes at night, to reduce the ‘chance’ of encounter, and come back to the same areas the next day (Courbin et al. 2019 J. Anim. Ecol.). This diel migration (similar to the famous diel vertical migration of aquatic animals) decrease risk by more than 60% in the dry season! (to the best of my knowledge this is the first quantification of the impact of such diel migration, correct me if I am wrong). Although I do work a lot with African ungulates, I do also conduct studies on temperate ungulates (e.g. roe deer: Padié et al. 2015 Oikos) including investigating the persistence of anti-predator behaviours in absence of predators (in black-tailed deer: Chamaillé-Jammes et al. 2014 Oecologia, Le Saout et al. 2015 Ethology). I even have studied rabbits ;-) (Blanchard et al. 2018 BMC Ecology). Check out the publication list!

    Overall, I am interested to understand the extent of all the non-lethal effects, still poorly quantified (Say-Sallaz et al. 2019 Biol. Cons.), that predators exert on their prey.

    Human activities reshape animal movements

    I am curious to understand to what extent people’s presence and human activities modifies movement strategies of animals. This can be done through large-scale global collaborative analyses, such as in Tucker et al. 2018 Science where we showed that animals move less where human footprint is high. I am however more interested in getting into the details of why this happens, and thus address the issue of human influence on animal movements in many systems. For instance, in areas where people, cattle and wildlife such as elephants and buffalo co-exist (Valls-Fox et al. 2018 Anim. Cons.). Elephant’s response differ widely to the one of buffalo, the former living with people by fine-scale adjustments while the latter is ‘pushed away’ from areas used by people. In France, we have shown that roe deer avoidance of risky areas occur both at the habitat scale and within-habitats, but not at larger scale (Padié et al. 2015 Oikos). We have also showed experimentally that roe deer reactive response is more associated with the proximity of the threat that the nature of it (Padié et al. 2015 Eur. J. Wildl. Res.). Currently, I am fascinated by how wild boars use the landscape, and the strategies they develop to navigate rural- to peri-urban gradients (ongoing studies). You can learn more about the project here (in French only for now though...): https://www.sangliers.cnrs.fr/

    These issues fit in my broader interest for understanding how people and ungulate (and their predators sometimes) interact (Kuijper et al. 2016 Proc. Roy. Soc. Lond. B, Martin et al. 2020 Biol. Rev.).

    Methods and tools for movement ecology

    I am always keen to think about, develop and try new approaches, always led by the eagerness to learn new things. So over the years, for instance, we have developed new statistical approaches to study recursion patterns in movement data (Riotte-Lambert et al. 2017 Behav. Ecol.), and to segment trajectories to detect behavioural modes or identify home-range shifts (Patin et al. 2020 J. Anim. Ecol., R package segclust2d).

    I have a particular interest in the study of habitat selection, so here again I am always willing to try new methods (Michelot et al. 2019 Biometrics) and I have recently revisited the classical interpretation of resource selection functions (Chamaillé-Jammes preprint on bioRxiv).

    Also, with my colleague L. Latorre, professor of electronical engineering, we have recently developed a new tool - the audiologger - that we use to record the sounds heard and made by the animal. Audio data, combined or not with GPS and accelerometer data, allow a much better inference of the behaviour of the animal (Wijers et al. 2019 Front. Ecol. Evol.), and of its response to environmental stimuli. This is ongoing, stay tuned for amazing data!

    The CNRS LTSER Hwange National Park (Zimbabwe): insights on the role of surface-water in the ecology of savanna ungulates.

    I've been working in Hwange NP (filled polygon in the map), one of the largest African's protected area, during my PhD (started in 2002), and ever since. Among other things, I've revealed that in this park climate change is occurring with drought becoming more severe (Chamaillé-Jammes et al. 2007 J. Arid Environm.). I've also clarified the drivers of vegetation spatial patterns (rainfall, waterholes: Chamaillé-Jammes et al. 2006 Int. J. Remote Sens., Chamaillé-Jammes et al. 2009 Ecography) and questioned the role of artificial water provision on the ecology of the park (Chamaillé-Jammes et al. 2007 Austral Ecol.). Finally, I have studied the long-term dynamics of the large herbivore community in the park (Valeix et al. 2008 Anim. Cons., Chamaillé-Jammes et al. 2016 PloS One).

    I have had, and still have, a special interest in understanding how availability of surface-water affects the distribution and population dynamics of elephants, in Hwange and elsewhere. See the following papers: Chamaillé-Jammes et al. 2007 J. Appl. Ecol. and Chamaillé-Jammes et al. 2008 J. Anim. Ecol. for some population-level studies, and Chamaillé-Jammes et al. 2013 PloS One, Tshipa et al. 2017 Biol. Cons. and Valls-Fox et al. 2018 Landscape Ecol. for some individual-level studies.

    Oh, and with others, this research has led Hwange NP to become a Long-Term Socio-Ecological Research (LTSER)(in French, "Zone Atelier") site of my institution, the CNRS (website). I currently am the deputy director of this program.

    Plant architecture is a key trait driving plant-herbivore interactions

    This is a bit of a side project for me, but I love it. By browsing plants, herbivores modify the growth and architecture of woody plants, changing their allometry (Moncrieff et al. 2011 Ecology). I believe that understanding plant architectural response to browsing is key to understand the tree-browser interaction. In savannas, we have worked to reveal the plant development rules leading to 'cages' and, using a suite of tree species, how these rules may be aggregated in an index that predict well the herbivore intake rate (Charles-Dominique et al. 2017 Funct. Ecol.). We are now extending current 3D architectural models of tree growth to simulate browsing, plant response and its effect on plant resource acquisition. But it all started with some drawings (this one is by C. Edelin. He says it's easy... and yes there is a tree that looks exactly like this!).

  • Publications

    For pdfs or stats, see my GoogleScholar here. My ORCID profile is here.

    To come...but already available: preprints!

    1. Rigoudy N., ..., Chamaillé-Jammes S. 2022. The DeepFaune initiative: a collaborative effort towards the automatic identification of the French fauna in camera-trap images. bioRxiv https://www.biorxiv.org/content/10.1101/2022.03.15.484324v1
    2. Chamaillé-Jammes S. A reformulation of the selection ratio shed light on resource selection functions and leads to a unified framework for habitat selection studies. bioRxiv https://doi.org/10.1101/565838
    3. Patin R., Fortin D., Chamaillé-Jammes S. A theory of the use of information by enemies in the predator-prey space race. bioRxiv https://doi.org/10.1101/2020.01.25.919324

    Peer-reviewed articles

    1. Broekman M.J.E., ..., Chamaillé-Jammes S., ..., Tucker M.A. Comparing habitat suitabilities retrieved from expert knowledge and tracking data for 45 mammal species. 2022. Global Ecology and Biogeography.
    2. Pandraud A., Shrader A., Tshipa A., Ngwenya N., Chamaillé-Jammes S. 2022. Cueing on distant conditions before migrating does not prevent false starts: a case study with African elephants. Oecologia.
    3. Suraci J.,  Smith J.A., Chamaillé-Jammes S., Gaynor K.M., Jones M., Luttbeg B., Ritchie E.G., Sheriff M.J., Sih A. 2022. Beyond spatial overlap: harnessing new technologies to resolve the complexities of predator-prey interactions. Oikos.
    4. Thel L., Chamaillé-Jammes S., Bonenfant C. 2022. How to describe and measure phenology? An investigation on the diversity of metrics using phenology of births in large herbivores. Oikos.
    5. Wielgus E, Caron A., Bennitt E., de Garine-Wichatitsky M., Cain B., Fritz H., Miguel E., Cornélis D., Chamaillé-Jammes S. 2021. Inter‐Group Social Behavior, Contact Patterns and Risk for Pathogen Transmission in Cape Buffalo Populations. Early View in Journal of Wildlife Management. 
    6. Wood M., Chamaillé-Jammes S., Hammerbacher A., Shrader A.M. 2021. African elephants can detect water from natural and artificial sources via olfactory cues. Early View in Animal Cognition.
    7. Kauffman M., Cagnacci F., Chamaillé-Jammes S., ... Zuther S. 2021. Mapping out a future for ungulate migrations. Science 372:566-569
    8. Esmaeili S.,..., Chamaillé-Jammes S., ..., Goheen J.R. 2021. Body size and digestive system shape resource selection by ungulates: a cross-taxa test of the Forage Maturation Hypothesis. Early View in Ecology Letters.
    9. Vitet C., Duncan P., Ganswindt A., Mabika C. Chamaillé-Jammes S. 2021. Do infanticides occur in harem-forming equids? A test with long-term sociodemographic data in wild plains zebras. Animal Behaviour 177:9-18.
    10. Thel L., Chamaillé-Jammes S., Keurinck L., Catala M., Packer C., Huebner S., Bonenfant C. 2021. Can citizen science analysis of camera trap data be used to study reproduction? Lessons from Snapshot Serengeti program. Wildlife Biology 2:wlb.00833. https://doi.org/10.2981/wlb.00833.
    11. Miele V., Dussert G., Spataro B., Chamaillé-Jammes S., Allainé D., Bonenfant C. 2021. Revisiting giraffe photo-identification using deep learning and network analysis. Methods in Ecology and Evolution 12:863-873.
    12. Wijers M., Trethowan P., du Preez B., Chamaillé-Jammes S., Loveridge A.J., Macdonald D.W., Markham A. 2021. The influence of spatial features and atmospheric conditions on African lion vocal behaviour. Animal Behaviour 174:63-76.
    13. Morin A., Chamaillé-Jammes S., Valeix M. 2021. Climate effects on prey vulnerability modify expectations of predator responses to short- and long-term climate fluctuations. Frontiers in Ecology and Evolution. https://doi.org/10.3389/fevo.2020.601
    14. Bondon R., Mathevet R., Mounet C., Chamaillé-Jammes S. 2021. Passer les limites, rythmer le territoire. Paysage et mobilité du sanglier en Valbonnais (Isère, France). Géocarrefour 95:N/A..
    15. Pays O., Blanchard P., Chamaillé-Jammes S., Valeix M., Loveridge A.J., Macdonald D.W., Périquet S., van der Meer E., Duncan P., Fritz H. 2020. Disentangling the roles of bottom-up and top-down drivers in the trade-off between food acquisition and safety in prey with multiple predators. Functional Ecology 35:435-449.
    16. Rumiano F., Wielgus E., Miguel E., Chamaillé-Jammes S., Valls-Fox H., Cornélis D., de Garine-Wichatitsky M., Fritz H., Caron A., Tran A. 2020. Remote Sensing of Environmental DriversInfluencing the Movement Ecology of Sympatric Wild and Domestic Ungulates in Semi-Arid Savannas, a Review. Remote Sensing 12, 3218.
    17. Wijers M., Trethowan P., du Preez B., Chamaillé-Jammes S., Loveridge A., Macdonald D.W., Markham A. 2020. Vocal discrimination of African lions and its potential for collar-free tracking. In press in Bioacoustics.
    18. Rozen-Rechels D., Valls-Fox H., Mabika C.T., Chamaillé-Jammes S. 2020. Temperature as a constraint on the timing and duration of African elephant foraging trips. J. Mammalogy 101:1670-1679.
    19. Vitet C., Duncan P., Gimenez O., Mabika C., Chamaillé-Jammes S. 2020. Plains zebras living under predation risk provide evidence that dilution and detection effects may not always matter behaviourally and demographically. Ecosphere 11:e03288.
    20. Wielgus E., Cornélis D., de Garine-Wichatitsky M., Cain B., Fritz B., Miguel E., Valls-Fox H., Caron A., Chamaillé-Jammes S. 2020. Are fission-fusion dynamics and their seasonal variations consistent among populations? A large-scale investigation with African buffalo (Syncerus caffer caffer). Ecology & Evolution 10:9240-9256.
    21. Pandraud A., Shrader A., Sholto-Douglas C., Chamaillé-Jammes S. 2020. Factors driving the rapid discovery and utilisation of a newly available area by African elephants. Journal of Tropical Biology 36:150-158.
    22. Martin J.-L., Chamaillé-Jammes S., Waller D.M. 2020. Deer, wolves, and people: costs, benefits and challenges of living together. Biological Reviews 95:782-801.
    23. Owen-Smith N., Hopcraft G., Morrison T., Chamaillé-Jammes S., Hetem R., Bennitt E., van Langevelde F. 2020. Movement ecology of large herbivores in African savannas: current knowledge and gaps. Mammal Review 50:252-266.
    24. Michelot T., Blackwell P.G., Chamaillé-Jammes S., Matthiopoulos J. 2020. Inference in MCMC step selection models. Biometrics 76:438-447.
    25. Patin R., Etienne M.-P., Lebarbier E., Chamaillé-Jammes S., Benhamou S. 2020. Identifying stationary phases in multivariate time-series for highlighting behavioural modes and home range settlements. Journal of Animal Ecology 89:44-56.
    26. Rozen-Rechels D., Dupoué A., Lourdais O., Chamaillé-Jammes S., Meylan S., Clobert J., Le Galliard J.-F. 2019. When water interacts with temperature: ecological and evolutionary implications of thermo-hydroregulation in terrestrial ectotherms. Ecology & Evolution 9:10029-10043.
    27. Makin D., Chamaillé-Jammes S., Shrader A. 2019. Alarm calls or predator calls: which elicit stronger responses in ungulate communities living with and without lions? Oecologia 190:25-35.
    28. Say-Sallaz E., Chamaillé-Jammes S., Fritz H., Valeix M. 2019. Non-consumptive effects of predation in large terrestrial mammalian systems: mapping our knowledge and revealing the tip of the iceberg. Biological Conservation 235:36-52.
    29. Blanchard P., Lauzeral C., Chamaillé-Jammes S., Brunet C., Lec’hvien A., Péron G., Pontier D. 2018. Coping with change in predation risk across space and time through complementary behavioral responses. BMC Ecology 18:60.
    30. Hartley A., Shrader A., Chamaillé-Jammes S. 2019. Can intrinsic foraging efficiency explain dominance status? A test with functional response experiments. Oecologia 189:105-110.
    31. Wijers M., Trethowan P., Markham A., du Preez B., Chamaillé-Jammes S., Loveridge A.W., Macdonald D.W. 2019. Listening to lions: Animal-borne acoustic sensors improve bio-logger calibration and behaviour classification performance. Frontiers in Ecology and Evolution https://doi.org/10.3389/fevo.2018.00171
    32. Courbin N., Loveridge A., Fritz H., Macdonald D., Patin R., Valeix M., Chamaillé-Jammes S. 2019. Zebra diel migration reduce encounter risk with lions at night. Journal of Animal Ecology 88:92-101.
    33. Patin R., Fortin D., Sueur C., Chamaillé-Jammes S. 2019. Space use and leadership modify dilution effects on optimal vigilance under food/safety trade-offs. The American Naturalist 193:E15-E28.
    34. Arraut E.M., Loveridge A.J., Chamaillé-Jammes S., Valls-Fox H., Macdonald D.W. 2018. The 2013-2014 vegetation structure map of Hwange National Park, Zimbabwe, produced using free satellite images and software. Koedoe 60:a1497.
    35. Couriot O. Hewison A.J.M., Said S., Cagnacci F., Chamaillé-Jammes S. Linnell J., Mysterud A., Peters W., Urbano F., Heurich M., Kjellander P., Nicoloso S., Berger A., Sustr P., Kroeschel M., Soennichsen L., Sandfort R., Gehr B., Morellet N. 2018. Truly sedentary? The multi-range tactic as a response to resource heterogeneity and unpredictability in a large herbivore. Oecologia 187:47-60.
    36. Tucker M., ..., Chamaillé-Jammes S., et al. 2018. Global reductions in terrestrial mammalian movements in human-dominated landscapes. Science 359:466-469.
    37. Valls-Fox H., Chamaillé-Jammes S., de Garine-Wichatitsky M., Perrotton A., Courbin N., Miguel E., Guerbois C., Caron A., Loveridge A.W., Stapelkamp B., Muzamba M., Fritz H. 2018. Water and cattle shape habitat selection by wild herbivores at the edge of a protected area. Animal Conservation 21:365-375.
    38. Makin D., Chamaillé-Jammes S., Shrader A. 2018. Changes in feeding behavior and patch use in response to the introduction of a new predator. Journal of Mammalogy 99:341-350.
    39. Riotte-Lambert L., Benhamou S., Bonenfant C., Chamaillé-Jammes S. Spatial memory shapes density-dependence in population dynamics. 2017. Proceedings of the Royal Society of London, Series B 284:20171411.
    40. Valls-Fox H., Fritz H., de Garine-Wichatitsky M., Chamaillé-Jammes S. 2017.Resource depletion vs. landscape complementation: habitat selection by a multiple central place forager. Landscape Ecology 33:127-140.
    41. Tshipa A., Valls-Fox H., Collins K., Fritz H., Sebele L., Mundy P., Chamaillé-Jammes S. 2017. Partial migration links local surface-water management to large-scale elephant conservation in the world's largest transfrontier conservation area. Biological Conservation 215:46-50.
    42. Makin D.F., Chamaillé-Jammes S., Shrader A.M. 2017. Herbivores attempt to reduce risk from ambush and cursorial predators by varying their use of a suite of anti-predator behaviours. Animal Behaviour 127:225-231.
    43. Charles-Dominique T., Barczi J., Le Roux E., Chamaillé-Jammes S. 2017. The architectural design of trees protects them against large herbivores. Functional Ecology 31:1710-1717.
    44. Riotte-Lambert L., Benhamou S., Chamaillé-Jammes S. 2017. From randomness to traplining: A conceptual and methodological framework for the study of routine movement behaviour. Behavioral Ecology 28:280-287.
    45. Kuijper D.P.J, Elmhagen B., Sahlén E., Chamaillé-Jammes S., Sand H., Lone K., Cromsigt J.P.G.M. 2016. Claws or paws? Ecological effects of large carnivores in anthropogenic landscapes. Proceedings of the Royal Society of London, Series B. 283:20161625.
    46. Le Saout S., Massouh M., Martin J.-L., Presseault-Gauvin H., Poilvé E., Côté S.D., Picot D., Verheyden H., Chamaillé-Jammes S. 2016. Levels of fecal glucocorticoid metabolites do not reflect environmental contrasts across islands in black-tailed deer (Odocoileus hemionus sitkensis) populations. Mammal Research 61:391-398.
    47. Chamaillé-Jammes S., Charbonnel A., Dray S., Madzikanda H., Fritz H. 2016. Spatial distribution of a large herbivore community at waterholes: an assessment of its stability over years in Hwange National Park, Zimbabwe. Plos One 11:e0153639.
    48. Bonnot N., Morellet N., Hewison A.J.M., Martin J.-L., Benhamou S., Chamaillé-Jammes S. 2016. Sitka black-tailed deer (Odocoileus hemionus sitkensis) adjust habitat selection and activity rhythm to the absence of predators. Canadian Journal of Zoology 94:385-394.
    49. Blanchard, P. Lauzeral, C., Chamaillé-Jammes S., Yoccoz, N.G., Pontier D. 2016. Analyzing the proximity to cover in a landscape of fear: A new approach applied to fine-scale habitat use by rabbits facing feral cat predation on Kerguelen archipelago. PeerJ 4:e1769.
    50. Courbin N., Loveridge A.J., McDonald D.W., Valeix M, Fritz H, Makuwe E., Fritz H., Chamaillé-Jammes S. 2016. Reactive responses of zebras to lion encounters shape their predator–prey space game at large scale. Oikos 125:829-838.
    51. Padié S., Morellet N., Cargnelutti B., Hewison A.J.M., Martin J.-L., Chamaille-Jammes S. 2015. Time to leave? Immediate response of roe-deer to contrasted playback experiments. European Journal of Wildlife Research 61:871-879.
    52. Padié S., Morellet N., Hewison A.J.M., Martin J.-L., Bonnot N., Cargnelutti B., Chamaille-Jammes S. 2015. Roe deer at risk: teasing apart habitat selection and landscape constraints in risk exposure at multiple scales. Oikos 124:1536-1546.
    53. Le Saout S., Martin J.-L., Blanchard P., Cebe N., Rames J.-L., Chamaillé-Jammes S. 2015. Seeing a ghost? Vigilance and its drivers in a predator-free world. Ethology 121:651-660.
    54. Le Saout S., Padié S., Chamaillé-Jammes S., Côté S., Morellet N., Pattison J., Harris E., Martin J-L. Sous presse. Short-term effects of hunting on naïve deer: behavioral response and consequences on vegetation growth. Canadian Journal of Zoology 92:915-925.
    55. Riotte-Lambert, L., Benhamou, S., Chamaillé-Jammes, S. 2015. How memory-based movement leads to non-territorial spatial segregation. The American Naturalist 185:e103-e116.
    56. Crosmary W., Chamaillé-Jammes S., Mtare G., Côté S.D., Fritz H. sous presse. Decline of sable antelope in one of its key conservation areas: the greater Hwange ecosystem, Zimbabwe. African Journal of Ecology 53:94-205.
    57. Barnier F., Valeix M., Duncan P., Chamaillé-Jammes S., Barre P., Loveridge A.J., Macdonald D.W., Fritz H. 2014. Diet quality in a wild grazer declines under the threat of an ambush predator. Proceedings of the Royal Society of London, Series B, 281:20140446.
    58. Chamaillé-Jammes, S., Malcuit H., Le Saout S., Martin, J.L. 2014. Innate threat-sensitive foraging: black-tailed deer remain more fearful of wolves than of the less dangerous black bear even after 100 years of wolf absence. Oecologia 174:1151-1158.
    59. Le Saout, S., Chollet, S., Chamaillé-Jammes, S., Blanc, L., Padié, S., Verchere, T., Gaston, A.J., Gillingham, M., Gimenez, O., Parker, K.L., Picot, D., Verheyden, H., Martin, J.L. 2014. Understanding the paradox of deer persisting at high abundance in heavily browsed habitats. Wildlife Biology 20:122-135.
    60. Benhamou, S., Valeix, M., Chamaillé-Jammes, S., MacDonald, D.W., Loveridge, A.J. 2014. Movement-based analysis of interactions in African lions. Animal Behavior 90:171-180.
    61. Moncrieff, G., Chamaillé-Jammes, S., Bond, W.J. 2014. Modelling direct and indirect impact of browser consumption on woody plant growth: moving beyond biomass. Oikos 123:315-322.
    62. Chamaillé-Jammes, S., Mtare, G., Makuwe, E., Fritz, H. 2013. African elephants adjust speed in response to surface-water constraint on foraging during the dry season. PloS One 8:e59164
    63. Riotte-Lambert, L., Benhamou, S., Chamaillé-Jammes, S. 2013. Periodicity analysis of movement recursions. Journal of Theoretical Biology 317:238-243.
    64. Chamaillé-Jammes, S., Blumstein D.T. 2012. A case for quantile regression in behavioral ecology: getting more out of flight initiation distance data. Behavioral Ecology and Sociobiology 66:985-992.
    65. Pays, O., Blanchard, P., Valeix, M., Chamaillé-Jammes, S., Duncan, P., Périquet, S., Lombard, M., Ncube, G., Tarakini, T., Makuwe, E., Fritz, H. 2012. Detecting predators and locating competitors while foraging: an experimental study of a medium-sized herbivores in an African savanna. Oecologia 169:419-430.
    66. Moncrieff, G., Chamaillé-Jammes, S., Higgins, S.I., O’Hara, R.B., Bond, W.J. 2011. Tree allometries reflect a lifetime of herbivory in an African savanna. Ecology 92:2310-2315.
    67. Valeix, M., Chamaillé-Jammes, S., Loveridge, A.J., Davidson, Z., Hunt, J.E., Madzikanda, H., Macdonald, D.W. 2011. Understanding patch departure rules for large carnivores: lion movements support a patch disturbance hypothesis. The American Naturalist 178:269-275.
    68. Fritz, H., Loreau, M., Chamaillé-Jammes, S., Valeix, M., Clobert, J. 2011. A food-web perspective on large herbivore community limitation. Ecography 34:196-202
    69. Chamaillé-Jammes, S., Bond, W.J. 2010. Will global change improve grazing quality of grasslands? A call for a deeper understanding of the effects of shifts from C4 to C3 grasses for large herbivores. Oikos 119:1857-1861.
    70. Midgley, J., Lawes, M., Chamaillé-Jammes, S. 2010. Savanna woody plant dynamics; the role of fire and herbivory, separately and synergistically. Australian Journal of Botany 58:1-11.
    71. Martin, J., Chamaillé-Jammes, S., Nichols, J.D., Fritz, H., Hines, J.E., Fonnesbeck, C.J., MacKenzie, D.I., Bailey, L.L. 2010. Simultaneous modeling of habitat suitability, occupancy, and relative abundance: African elephants in Zimbabwe. Ecological Applications 20:1173-1182.
    72. Chamaillé-Jammes, S., Fritz, H, Madzikanda, H. 2009. Piosphere contribution to landscape heterogeneity: a case-study of remote-sensed woody cover in a high elephant density landscape. Ecography 32:871-880.
    73. Chamaillé-Jammes, S., Valeix, M., Bourgarel, M., Murindagomo, F., Fritz, H. 2009 Seasonal density estimates of common large herbivores in Hwange National Park, Zimbabwe. African Journal of Ecology 44: 804-808.
    74. Valeix, M., Loveridge, A., Chamaillé-Jammes, S., Davidson, Z., Murindagomo, F., Fritz, H., Macdonald, D.W. 2009. Behavioural adjustments of African herbivores to predation risk by lions: spatiotemporal variations influence habitat use. Ecology 90:23-30.
    75. Chamaillé-Jammes S., Fritz H. 2009. Precipitation-NDVI relationships in eastern and southern African savannas vary along a precipitation gradient. International Journal of Remote Sensing 30:3409-3422.
    76. Valeix M., Fritz H., Chamaillé-Jammes S., Bourgarel M., Murindagomo F. 2008. Fluctuations in abundance of large herbivore populations: insights into the influence of dry season rainfall and elephant numbers from long-term data. Animal Conservation 11:391-400.
    77. Chamaillé-Jammes S., Fritz H., Valeix M., Murindagomo F., Clobert J. 2008. Resource variability, aggregation and direct density dependence: the local regulation of an African elephant population. Journal of Animal Ecology 77:135-144.
    78. Valeix M., Chamaillé-Jammes S., Fritz H. 2007. Interference competition and temporal niche shifts: elephants and ungulate communities at waterholes. Oecologia 153: 739-748.
    79. Chamaillé-Jammes, S., Fritz, H., Holdo, R. 2007. Spatial relationship between elephant and sodium concentration of water disappears as density increases in Hwange National Park, Zimbabwe. Journal of Tropical Ecology 23:725-728.
    80. Chamaillé-Jammes, S., Valeix, M., Fritz, H. 2007. Elephant management: why can’t we throw the babies with the artificial bathwater? Diversity and Distributions 13:663-665.
    81. Chamaillé-Jammes S., Fritz H., Murindagomo F. 2007. Climate-driven fluctuations in surface-water availability and the buffering role of artificial pumping in an African savanna: potential implication for herbivore dynamics. Austral Ecology 32:740-748.
    82. Chamaillé-Jammes S., Fritz H., Murindagomo F. 2007. Detecting climate changes of concern in highly variable environments: quantile regressions reveal that droughts worsen in Hwange National Park, Zimbabwe. Journal of Arid Environments 71:321-326.
    83. Chamaillé-Jammes S., Valeix M., Fritz H. 2007. Managing heterogeneity in elephant distribution: interactions between elephant population density and surface-water availability. Journal of Applied Ecology 44:625-633.
    84. Chamaillé-Jammes S., Fritz H., Murindagomo F. 2006. Spatial patterns of the NDVI rainfall relationship at the seasonal and interannual time-scales in an African savanna. International Journal of Remote Sensing 27:5185-5200.
    85. Chamaillé-Jammes S., Massot M., Aragón P., Clobert J. 2006. Global warming and positive fitness response in mountain populations of common lizards Lacerta vivipara. Global Change Biology 12:392-402.
    86. Bonnadonna F., Chamaillé-Jammes S., Pinaud D., Weimerskirch H. 2003. Magnetic cues: are they important in black-browed albatrosses (Diomedea melanophris) orientation? Ibis 145:152-155.
    87. Chamaillé-Jammes S., Guinet C., Nicoleau F., Argentier M. 2000. A method to assess population changes in king penguins: the use of a Geographical Information System to estimate area-population relationships. Polar Biology 23:545-549.


    Book chapters

    1. Chamaillé-Jammes S., Valeix M., Cromsigt J. 2019. Predator effects on prey dynamics and behaviour: what are the mechanisms that could lead to trophic cascades? In: Herbivores and Savanna Plant Communities (Editors : Scogings P, Skarpe C) Wiley-Blackwell.
    2. Charles-Dominique T., Barczi J.-F., Chamaillé-Jammes S. 2019. Tree architectural design against browsers. In: Herbivores and Savanna Plant Communities (Editors : Scogings P, Skarpe C) Wiley-Blackwell.
    3. Chamaillé-Jammes S., Valeix M., Madzikanda H., Fritz H. 2014. Surface-water and elephant ecology: lessons from a waterhole-driven ecosystem, Hwange National Park, Zimbabwe. Dans: African Elephants and Savanna Heterogeneity (Editors: du Toit JH, Skarpe C., Moe S.), Wiley-Blackwell, pp. 118-131.


  • Students

    I always welcome new ideas and opportunities. Same for students. Come with some idea about what you would like to do, and let's chat. Unfortunately, all of this is nice but will not feed you, and finding a salary for you may be tricky. So please keep you eyes open for funding opportunities, and ideally come with suggestions when you approach me.


    2017 - 2020: Benedikt Gehr

    2014 - 2015: Nicolas Courbin




    2021 - 2024: Romain Dejeante, co-directed by M. Valeix and me.

    In progress: Importance of social interactions for animal movements

    2021 - 2024: Noa Rigoudy, co-directed by M. Hewison and me.

    In progress: Importance of crops for the spatial dynamics of the roe deer

    2020 - 2023: Gustave Fradin, directed by me.

    In progress: Resting strategies of the wild boar in anthropogenic landscapes.

    2019 - 2022: Anne Pandraud, co-directed by A. Shrader and me.

    In progress: Interactions between the elephant and its environment.

    2018 - 2021: Oksana Grente, co-directed by O. Gimenez and me.

    'Understanding the depredation process in grey wolf (Canis lupus) and its interactions with lethal measures: focus on the French Alpine Arc'

    2018 - 2021: Lucie Thel, co-directed by C. Bonenfant and me.

    'Phenology of births in ungulates: insights on its measure and its ecological determinants'

    2017 - 2020: Camille Vitet, directed by me.

    'Effect of group size on the behaviour, demography and social dynamics in plains zebras living under predation risk'

    2017 - 2020: Elodie Wielgus, co-directed by B. Cain, D. Cornelis, A. Caron and me.

    'The social dynamics of the Cape buffalo and the epidemiological implications'

    2015 - 2018: Rémi Patin, co-directed by D. Fortin and me.

    'Jeu spatial et interactions comportementales dans l’interaction prédateur-proie'

    2013 - 2016: Louise Riotte-Lambert, co-directed by S. Benhamou and me.

    'Approche théorique et méthodologique des stratégies de déplacement récursif et de leurs conséquences populationnelles'

    2013 - 2016: Doug Makin, co-directed by A. Shrader and me.

    'Varying degrees of fear: How do large herbivores adjust their anti-predator behaviour in response to different predators?'

    2012 - 2015: Hugo Valls, co-directed by H. Fritz, M. de Garine-Wichatistky and me.

    'To drink or not to drink: The influence of resource availability on elephant foraging and habitat selection in a semi-arid savanna'

    2011 - 2014: Sophie Padié, co-directed by J.L. Martin and me.

    'Non-lethal effects of hunting on deer: space use strategies at multiple scales and ecosystem consequences'

    2010 - 2013: Soizic Le Saout, co-directed by J.L. Martin and me.

    'Understanding high deer densities in depleted environments: the role of food and fear in Sitka black-tailed deer'


    And many shorter-term students.


  • Contact









    1919 route de Mende,

    34293 Montpellier Cedex 5,