Interactions Biotiques

Finn KJELLBERG

FINN Fujen Province3

Directeur de recherche au CNRS

 

Je m'intéresse à l'écologie et à l'évolution des interactions inter-spécifiques. Mes études portent plus particulièrement sur les processus de coévolution et de diversification dans le système Ficus-insectes des figues.

 

I am interested in the ecology and evolution of inter-specific interactions. My studies are largely focused on coevolutionary processes and diversification in the fig-fig wasp system.

 

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Directeur du département INES du CEFE

CEFE UMR5175
Campus du CNRS
1919, route de Mende
F-34293 Montpellier cedex 5
France

Tél : +33 (0) 4 67 61 32 29
Fax : +33 (0) 4 67 61 33 36


Mots-clés :
Organisme biologique : Ficus et chalcidiens associés
Milieu : tropical
Discipline : biologie évolutive
Technique : loupe
Thématique : coévolution
Autres mots clés : biologie de la conservation

reino unido

 

 

Go to Publications

 

La diversité biologique (biodiversité) du monde qui nous entoure est bien difficile à interpréter. Les communautés sont-elles saturées ou bien y a-t-il des fonctions non remplies ? Y a-t-il redondance d’espèces jouant le même rôle ? Comment se constitue cette diversité ? Quel est le poids de l’histoire et notamment des changements globaux intervenus par le passé ? Quel est le devenir de ces communautés confrontées aux changements induits par l’homme ?

Les réponses à ces questions sont tout aussi centrales pour la compréhension de ce qu’est l’évolution que pour des perspectives de biologie de la conservation. Elles permettraient de donner une réponse scientifique à la question : à quoi sert la biodiversité ?

Cependant les communautés sont généralement des entités floues. Par exemple, si nous observons une plante pollinisée par une espèce d’insecte, nous ne pouvons savoir s’il s’agit d’une situation ancienne, les espèces s’étant plus ou moins influencées au cours de leur évolution, s’il s’agit d’une situation ponctuelle, transitoire dans le temps, ou s’il s’agit d’une situation nouvelle appelée à perdurer. Il est donc bien difficile de comprendre l’origine et le devenir de réseaux d’interactions lâches.

Pour palier ce problème, l’équipe interactions biotiques a décidé d’étudier les communautés à partir des modèles biologiques simples constitués par les interactions durables spécifiques. Les aspects spécificité et durabilité garantissent que la force de ces interactions va façonner l’évolution des espèces. Mon modèle de prédilection, non exclusif, est la communauté de micro-hyménoptères associés aux figues.

Il existe environ 1000 espèces de Ficus à travers le monde. A chacune est associée une communauté d’hyménoptères spécifiques se développant dans les figues (inflorescence refermée sur elle même dont l’intérieur est tapissé de fleurs femelles uniovulées). Ces espèces peuvent se développer en transformant la fleur en galle, en inquilin d’un insecte galligène, en parasitoïde ou même en consommateur de graine. Les Ficus sont exclusivement pollinisés par une famille de Chalcidiens galligènes, les Agaonidae, qui ont coévolué avec les Ficus.

Nos études ont beaucoup porté sur l’histoire évolutive des relations Ficus pollinisateurs avec des question telles que : comment les relations Ficus dioïque pollinisateurs peuvent-elle être évolutivement stables, pourquoi les pollinisateurs n’exploitent-ils pas toutes les fleurs, comment a évolué le messager chimique permettant aux insectes de trouver les figues réceptives ? Une question particulièrement passionnante est pourquoi la pollinisation active ? En effet environ 2/3 des espèces de pollinisateurs de figuier collectent du pollen dans des poches spécialisées avant de sortir de leur figue natale et chaque fois qu’ils pondent un œuf, ils déposent un peu de pollen. Comment et pourquoi ce comportement est-t-il apparu et pourquoi a-t-il été maintenu chez certaines espèces mais pas d’autres ? Répondre à ces questions a impliqué un large travail d’analyse comparative sur l’ensemble des Ficus et la mise en évidence de corrélation de caractères adaptatifs entre plantes et insectes (coévolution). Le travail centré sur les Ficus et les pollinisateurs a permis de comprendre la taxonomie et la phylogénie des Ficus et des Agaonidae et d'analyser la distribution de nombre de caractères morphologiques et biologiques. Nous avons aussi mis au point une parti des marqueurs génétiques qui permettront d’analyser la phylogéographie des Ficus (fluctuations d’aires, refuges). Finalement nous avons réalisé des collectes des communautés associées à bon nombre d’espèces de Ficus.

Nos études à venir vont porter bien plus que jusqu’à présent sur l’ensemble des communautés. Ce travail est obligatoirement éminemment collectif de par le nombre d’espèces concernées (une myriade) ainsi que de part la diversité des compétences à mettre en œuvre. A partir des quelques éléments disponibles on peut proposer quelques pistes de travail. Les communautés associées aux Ficus dioïques sont généralement bien plus simples que celles associées aux Ficus monoïques. Est-ce lié à la simplification de la structure interne de la figue ou au fonctionnement apparemment bien plus local des populations d’insectes liés aux Ficus dioïques ? Y a-t-il une liaison entre aire de distribution –et éventuels goulots d’étranglement récents- d’un Ficus et diversité de son entomofaune ? Au sein de différents genres de parasites, il semble y avoir eu à plusieurs reprises changement de régime alimentaire avec passage d’une forme galligène à une forme parasitoïde ou l’inverse, puis une fois évoluée la capacité à utiliser une nouvelle niche écologique, colonisation de nouveaux hôtes par transfert entre espèces sans cocladognèse. Mais une fois toutes les espèces colonisées on pourrait repasser à un système à transmission par cocladogenèse. Il y a donc matière pour reconstruire l’évolution du rôle des espèces dans les communautés à travers des analyses comparatives. Nous sommes persuadés que ce modèle constituera un bon modèle d’étude pour comprendre l’origine, le fonctionnement, la structure et le devenir des communautés.

Les Ficus jouent également un rôle important en biologie de la conservation du fait de leur rôle dans le maintien des communautés de disperseurs de graines. De nombreuses facettes de nos études sont vouées à apporter des réponses concrètes à des questions d’ordre appliqué.

Les principaux autres intervenants sur les projets Ficus de l’équipe sont Astrid Cruaud (CBGP), Martine Hossaert-McKey, Magali Proffit, Jean-Yves Rasplus (CBGP), Bertrand Schatz, Yildiz Aumeeruddy-Thomas.

Pour en savoir plus sur les Ficus : Le site FIGWeb

 

The diversity of the living world (biodiversity) is difficult to understand. Are communities saturated or are some functions not fullfilled? Is there a redundancy of species playing the same role? How does this diversity arise? What is the weight of history, and of past global change in particular? What is the destiny of these communities confronted with man-induced changes?

Answering these questions is central for the understanding of what is evolution as well as for perspectives in conservation biology. They would allow a scientific answer to the questions: what is the use of biodiversity?

Communities are however generally fuzzy entities. For instance if we observe a plant pollinated by an insect species, we do not know if it is an ancient situtation, the different species having more or less influenced each other during their evolution, on whether it is a punctual, transient situation, or whether it is a new situation that is going to last. It is therefore difficult to understand the origin and the future of networks of facultative interactions.

To bypass  this problem, the biotic interactions team has decided to investigate communities based on simple biological models constituted by specific long term interactions. Specificity and durability ensures that the strength of these interactions will shape the evolution of these species. My non exclusive predilection model is the community of micro-hymenopteran associated with figs.

There are about 1000 species of Ficus distributed throughout the tropics. Each is associated with a community of specific hymenopteran breeding within figs (the enclosed inflorescence of Ficus, the inside of which is lined by female florets). The larva may develop by transforming the flower into a gall, as cleptoparasites of a galling insect, as parasitoids or even as seed eaters. Ficus are exclusivel pollinated by a familli of galling chalcids, the Agaonidae, which have coevolved with Ficus.

Ficus also play an important role in conservation biology because of their role in sustaining communities of seed dispersers. A number of facets of our studies deal with providing practical answers to apllied questions.

The main participants in the team's projects on Ficus are Astrid Cruaud (CBGP), Martine Hossaert-McKey, Magali Proffit, Jean-Yves Rasplus (CBGP), Bertrand Schatz, Yildiz Aumeeruddy-Thomas.

For more information on Ficus: FIGWeb

 

Liste de Publications

Liu ZX, Yang P, Zhang Y, Li ZB, Kjellberg F (2019). Antennae and the role of olfaction and contact stimulation in mate recognition by males of the pollinating fig wasp Ceratosolen gravelyi (Hymenoptera: Agaonidae). Journal of Natural History (TNAH), 53:13-14, 779-795. https://doi.org/10.1080/00222933.2019.1609112

Yu H, Tian E, Zheng L, Deng X, Cheng Y, Chen L, Wu W, Tanming W, Zhang D, Compton SG, Kjellberg F. (2019). Multiple parapatric pollinators have radiated across a continental fig tree displaying clinal genetic variation. Molecular Ecology, 28: 2391–2405.

Aumeeruddy-Thomas Y., Rafidison V.M., Kjellberg F., Hossaert-McKey M. (2018). Sacred hills of Imerina and the voyage of Ficus lutea Vahl (Amontana) in Madagascar. Acta Oecologica, 90: 18-27. DOI 10.1016/j.actao.2018.04.005

Borges R.M., Compton S.G., Kjellberg F. (2018). Fifty years later, figs and their associated communities. Acta Oecologica, 90: 1-3

Bruun-Lund S., Verstraetea B., Kjellberg F., Rønsted N. (2018). Rush hour at the Museum – Diversification patterns provide new clues for the success of figs (Ficus L., Moraceae).the success of figs (Ficus L., Moraceae). Acta Oecologica, 90: 4-11.

Elias⁠ L.G., Kjellberg F., Farachea F.H.A., Botelho de Almeida E.A., Rasplus J.Y., Cruaud A., Peng Y.Q.d, Yang D.R., Pereira R.A.S. (2018). Ovipositor morphology correlates with life history evolution in agaonid fig wasps. Acta Oecologica, 90: 199-116.

Farache⁠⁠ F.H.A., ⁠Cruaud A., Rasplus J.Y., Cerezini M.T., Rattis L.M., Kjellberg F., Pereira R.A.S. (2018). Insights into the structure of plant-insect communities: Specialism and generalism in a regional set of non-pollinating fig wasp communities. Acta Oecologica, 90: 49-59.

Pereira R.A.S., Kjellberg F. (2018) Check-list de Ficus L. no estado do Mato Grosso do Sul. Iheringia, Série Botânica, Porto Alegre, 73(supl.): 216-218.

Taudiere A., Bellanger J.M., Carcaillet C., Hugot L., Kjellberg F., Lecanda A., Lesne A., Moreau P.A.,
Scharmann K., Leidel S., Richard F. (2018) Diversity of foliar endophytic ascomycetes in the endemic Corsican pine forests.pine forests. Fungal Ecology, 36: 128-140.
 
Teixeira S.P., Costa M.F.B., Basso-Alves J.P., Kjellberg F., Pereira R.A.S. (2018). Morphological diversity and function of the stigma in Ficus species (Moraceae). Acta Oecologica, 90: 117-131.
 
Yang P., Li Z.B., Yang D.R., Peng Y.Q., Kjellberg F. (2018). Comparison of the antennal sensilla of females of four fig-wasps associated with Ficus auriculata. Acta Oecologica, 90: 99-108.
 
Yu H., Liang D., Tian E., Zheng L., Kjellberg F. (2018). Plant geographic phenotypic variation drives diversification in its associated community of a phytophagous insect and its parasitoids. BMC Evolutionary Biology (2018) 18:134
 
 
Bruun-Lund S., Clement W.L., Kjellberg F., Ronsted N. (2017) First plastid phylogenomic study reveals potential cyto-nuclear discordance in the evolutionary history of Ficus L. (Moraceae). Molecular Phylogenetics and Evolution 109, 93–104
 

Costa P.C., Lorenz-Lemke A.P., Furini P.R., Honorio Coronado E.N., Kjellberg F., Pereira R.A.S. (2017) The phylogeography of two disjunct Neotropical Ficus (Moraceae) species reveals contrasted histories between the Amazon and the Atlantic Forests. Botanical Journal of the Linnean Society 185, 272–289.

Rodriguez L.J., Bain A., Chou L.S., Conchou L., Cruaud A., Gonzales R., Hossaert-McKey M., Rasplus J.Y., Tzeng H.Y., Kjellberg F. (2017) Diversification and spatial structuring in the mutualism between Ficus septica and its pollinating wasps in insular South East Asia.pollinating wasps in insular South East Asia. BMC Evolutionary Biology 17, 207

Rodriguez L.J.,Young F., Rasplus J.Y., Kjellberg F., Compton S.G. (2017) Constraints on convergence: hydrophobic hind legs allow some male pollinator fig wasps early access to submerged females. Journal of Natural History, 51, 761-782

Schatz B., Sauvion,N., Kjellberg F., & Nel A. (2017). Plant-Insect Interactions: a Paleontological and an Evolutionary Perspective. In N. Sauvion, P-A. Calatayud, D. Thiéry (Volume Eds), Advances in Botanical Research series : Vol 81. Insect-Plant Interactions in a Crop Protection Perspective (pp. 1-24). Elsevier, GBR. http://dx.doi.org/10.1016/bs.abr.2016.11.002

Bain A., Borges R.M., Chevallier M.H., Vignes H., Kobmoo N., Peng Y.Q., Cruaud A., Rasplus J.Y., Kjellberg F., Hossaert-McKey M. (2016). Geographic structuring into vicariant species-pairs in a wide-ranging, high dispersal plant-insect mutualism: the case of Ficus racemosa and its pollinating wasps. Evolutionary Ecology, 30, 663–684.

Chantarasuwan B., Thongsrikem S., Pinyo P., Kanithajata P., Kjellberg F. (2016) A natural population of Ficus elastica Roxb. ex Hornem., in Thailand. The Thailand Natural History Museum Journal 10: 7-14.

Chantarasuwan B., Rønsted N., Kjellberg F., Sungkaew S., van Welzen P.C. (2016). Palaeotropical intercontinental disjunctions revisited using a dated phylogenetic hypothesis with nearly complete species level sampling of Ficus subsect. Urostigma (Moraceae). Journal of biogeography, 43, 384-397.

Deng J.Y., Fu R.H., Hu D.M., Compton S.G., Zhang L.S., Yang F., Chen Y., Kjellberg F. (2016). Extremely high proportions of male flowers and geographical variation in floral ratios within male figs of Ficus tikoua despite pollinators displaying active pollen collection. Ecology and Evolution, 6, 607–619.

Kjellberg F., Proffit M. (2016). Tracking the elusive history of diversification in plant-herbivorous insect-parasitoid food webs: insights from figs and fig-wasps. Molecular Ecology, 25, 843-845.

Chantarasuwan B., Berg C.C., Kjellberg F., Rønsted N., Garcia M., Baider C., van Welzen P.C. (2015). A new classification of Ficus subsection Urostigma (Moraceae) based on four nuclear DNA markers (ITS, ETS, G3pdh, and ncpGS), morphology and leaf anatomy. PLoS ONE, 10, e0128289.

Devicaro de Souza C.D., Pereira R.A.S., Marinho C.R., Kjellberg F., Teixeira S.P. (2015). Diversity of fig glands is associated with nursery mutualism in fig trees. American Journal of Botany, 102, 1564-1577.

Tian E., Nason J.D., Machado C., Zheng L., Yu H., Kjellberg F. (2015). Lack of genetic isolation by distance, similar genetic structuring but different demographic histories in a fig-pollinating wasp mutualism. Molecular Ecology, 24, 5976-5991.

Bain A., Chou L.S., Tzeng H.Y., Ho Y.C., Chiang Y.P., Chen W.H., Chio Y.T., Li G.Y., Yang H.W., Kjellberg F., Hossaert-McKey M. (2014). Plasticity and diversity of the phenology of dioecious Ficus species in Taiwan, Acta Oecologica, 57, 124-134.

Borges R.M., Kjellberg F. (2014). New insights from the fig-fig wasp model interaction system. Acta Oecologica, 57, 3-4.

Conchou L., Cabioch L., Rodriguez L.J.V., Kjellberg F. (2014). Daily rhythm of mutualistic pollinator activity and scent emission in Ficus septica: ecological differentiation between co-occurring pollinators and potential consequences for chemical communication and facilitation of host speciation. PlosONE, 9, e103581

Conchou L.,Ciminera M., Hossaert-McKey M., Kjellberg F. (2014). The non-pollinating fig wasps associated with Ficus guianensis: Community structure and impact of the large species on the fig/pollinator mutualism, Acta Oecologica, 57, 28-37.

Jansen-González S., Teixeira, S.P., Kjellberg F., Pereira R.A.S (2014). Same but different: larval development and gall-inducing process of a non-pollinating fig wasp compared to that of pollinating fig-wasps. Acta Oecologica, 57, 44-50.

Kjellberg F. (2014). In memoriam: Cornelis Christiaan Berg (2 July 1934-31 August 2012). Acta Oecologica, 57, 1-2.

Kjellberg F., Suleman N., Raja S., Tayou A., Hossaert-McKey M., Compton S.G. (2014). Some pollinators are more equal than others: factors influencing pollen loads and seed set capacity of two actively and passively pollinating fig wasps. Acta Oecologica, 57, 73-79.

Tzeng H.Y., Chern-Hsiung C.H., Lu F.Y., Bain A., Chou L.S., Kjellberg F. (2014). The effect of fig wall thickness in Ficus erecta var. beecheyana on parasitism. Acta Oecologica, 57, 38-43.

Yang H.W, Bain A., Garcia M., Chou L.S., Kjellberg F. (2014). Evidence of genetic influence on the flowering pattern of Ficus microcarpa. Acta Oecologica, 57, 117-123.

Wei Z.D., Kobmoo N., Cruaud A., Kjellberg F. (2014). Genetic structure and hybridization in the species group of Ficus auriculata: can closely related sympatric Ficus species retain their genetic identity while sharing pollinators? Molecular Ecology, 23, 3538-3550.

van Welzen P.C., Gadella T.W.J., Maas P.J.M., Daly D.C., Mori S.A., Joergensen P.M.,Obermuller F.A., Kjellberg F., Ronsted N., Chantarasuwan B., Lut C.W.T. (2013). In memoriam Cees Berg (2 July 1934-31 August 2012). Blumea, 57, 199-206.

Schatz B., Hossaert-McKey M., Kjellberg F. (2013). Histoire évolutive et diversité des interactions insectes pollinisateurs-plantes. Chapitre 36 in Interactions insectes-plantes, Sauvion N., Catalyud P.A., Thierry D., Marion-Poll F.,editeurs, éditions Quae, pp 565-576.

Schatz B., Proffit M., Kjellberg F., Hossaert-McKey M. (2013). Un reseau trophique complexe : le cas des figuiers. Chapitre 32 in Interactions insectes-plantes, Sauvion N., Catalyud P.A., Thiery D., Marion-Poll F.,editeurs, éditions Quae, pp 483-493.

Kjellberg F. (2012). Biodiversity and global change in Southern Africa - editor, Acta Oecologica, 42, 1-66.

Bain A., Chantarasuwan B., Chou L.S., Hossaert McKey M., Schatz B., Kjellberg F. (2012). A new case of ants nesting within branches of a fig tree: the case of Ficus subpisocarpa in Taiwan. Sociobiology, 59, 415-434.

Cornille A., Underhill J.G., Cruaud A., Hossaert-McKey M., Johnson S.D., Tolley K.A., Kjellberg F., van Noort S., Proffit M. (2012). Floral volatiles, pollinator sharing and diversification in the fig-wasp mutualism: insights from Ficus natalensis, and its two wasp pollinators (South Africa). Proceedings of the Royal Society B, 279, 1731-1739.

Cruaud A., Ronsted N., Chantarasuwan B., Chou L.S., Clement W.L., Couloux A., Cousins B., Genson G., Harrison R.D., Hanson P.E., Hossaert-McKey M., Jabbourzahab R., Jousselin E., Kerdelhue C., Kjellberg F., Lopez-Vaamonde C., Peebles J., Peng Y.Q., Pereira R.A.S., Schramm T., Ubaidillah R., Van Noort S., Weiblen W.D., Yang D.R., Yodpinyanee A., Libeskind-Hadas R., Cook J.M., Rasplus J.Y., Savolainen V. (2012). An extreme case of plant-insect co-diversification: figs and fig-pollinating wasps. Systematic Biology, 61, 1029-1047.

Cruaud C., Cook J., Yang D.R., Genson G., Jabbour-Zahab R., Kjellberg F., Pereira R.A.S., Rønsted N., Santos-Mattos O., Savolainen V., Ubaidillah R., van Noort S. , Peng Y.Q., Rasplus J.Y. (2012). 4. Fig–fig wasp mutualism: the fall of the strict cospeciation paradigm? pp. 68-102 in Evolution of Plant–Pollinator Relationships, ed S. Patiny. Published by Cambridge University Press. © The Systematics Association.

Elias L.G., Teixeira S.P., Kjellberg F., Pereira R.A.S. (2012). Diversification in the use of ressources by Idarnes species: bypassing functional constraints in the fig-fig wasp interaction. Biological Journal of the Linnean Society, 106, 114-122.

Garcia M., Bain A., Tzeng HY, Peng YQ, Chou LS, Kjellberg F (2012). Portable microsatellite primers for Ficus (Moraceae). American Journal of Botany Primer Notes and Protocols in the Plant Sciences, e187-e192.

Machado A.F.P., Pereira R.A.S.P., Kjellberg F. (2012). Ficus (Moraceae) da Mata Atlantica, Brasil - Ficus of the Atlantic Rainforest. Field Museum Plant Guides.

Cruaud A., Jabbour-Zahab R., Genson G., Couloux A., Peng Y.Q., Rong Y.D., Ubaidillah R., Pereira R.A.S., Kjellberg F., van Noort S., Kerdelhue C., Rasplus J.Y. (2011). Out of Australia and back again: the world-wide historical biogeography of non-pollinating fig wasps (Hymenoptera: Sycophaginae). Journal of Biogeography, 38, 209-225.

Cruaud A., Jabbour-Zahab R., Genson G., Kjellberg F., Kobmoo N., van Noort S., Da-Rong Y.,Peng Y.Q., Ubaidillah R., Hanson P.E., Santos-Mattos O., Farache F.H.A, Pereira R.A.S., Kerdelhue C., Rasplus J.Y. (2011). Phylogeny and evolution of life-history strategies in the Sycophaginae nonpollinating fig wasps (Hymenoptera, Chalcidoidea). BMC Evolutionary Biology, 11, 178.

Dev S.A., Kjellberg F., Hossaert-McKey M., Borges R.M. (2011). Fine-scale population genetic structure of two dioecious Indian keystone species, Ficus hispida and F. exasperata (Moraceae). Biotropica, 43, 309-316.

Rafidison V.M., Rabevohitra R., Aumeeruddy-Thomas Y., Hossaert-McKey M., Rasplus J.Y., Kjellberg F. (2011). Notes taxonomiques et identification des Ficus malgaches. Acta Botanica Gallica, 158, 453-472.

Schatz B., Bessière J.M., Delle-Vedove R., Hossaert-McKey M., Kjellberg F. (2011). Les mutualismes de pollinisation comme facteurs importants de biodiversité. Pp 48-66 In Pietrasanta Y. et Schatz B. éditeurs « Le génie de la nature ». Biotope éditions, Mèze, France.

Achtak H., Ater M., Oukabli A., Santoni S., Kjellberg F., Khadari B. (2010). Traditional agroecosystems as conservatories and incubators of cultivated plant varietal diversity: the case of fig (Ficus carica L.) in Morocco. BMC Plant Biology, 10, 28.

Alvarez N., McKey D., Kjellberg K. Hossaert-McKey M. (2010). Phylogeography and historical biogeography of obligate specific mutualisms. In "The Biogeography of Host-Parasite Interactions". Morand S, Krasnov BR, (Eds.), Oxford University Press, Oxford.

Cruaud A., Jabbour-Zahab R., Genson G., Cruaud C., Couloux A., Kjellberg F., Rasplus J.Y. (2010). Laying the foundations for a new classification of Agaonidae (Hymenoptera: Chalcidoidea), a multilocus phylogenetic approach. Cladistics, 25, 1-19 .

Kobmoo N., Hossaert-McKey M., Rasplus J.Y., Kjellberg F. (2010). Ficus racemosa is pollinated by a single population of a single agaonid wasp species in continental South-East Asia. Molecular Ecology, 19, 2700-2712.

Narita S., S. Pereira R.A., Kjellberg F., Kageyama D. (2010). Gynandromorphs and intersexes: potential to understand the mechanism of sex determination in arthropods. Terrestrial Arthropod Reviews, 3, 63–96.

Renoult J.P., Courtiol A., Kjellberg F. (2010). When assumptions on visual system evolution matter: nestling colouration and parental visual. Journal of Evolutionary Biology, 23, 220-225.

Schatz B., Proffit M., Kjellberg F., Hossaert-McKey M. (2010). Fourmis et figuiers. Les Courriers de la Nature, 250, 58.

Achtak H., Oukabli A., Ater M., Santoni S., Kjellberg F., Khadari B. (2009). Microsatellite markers as reliable tools for fig cultivar identification. Journal of the American Society for Horticultural Sciences, 134, 624-631.

Kobmoo N., Vignes H., Hossaert-McKey M., Wei Z., Kjellberg F. (2009). Isolation and characterization of microsatellite primers for Ceratosolen fusciceps, the fig pollinating wasp of Ficus racemosa, and amplification in two populations. Permanent Genetic Resource Note, 1147-1150.

Léotard G, Duputié A., Kjellberg F., Douzery E.J.P, Debain C., de Granville J.J., McKey D. (2009). Phylogeography and the origin of cassava: new insights from the northern rim of the Amazonian basin. Molecular Phylogenetics and Evolution, 53, 329-334.

Léotard G., Debout G., Dalecky A., Guillot S., Gaume L., McKey D., Kjellberg F. (2009). Range expansion drives dispersal evolution in an equatorial three-species symbiosis. PLoS ONE, 4, e5377. doi:10.1371/journal.pone.0005377.

Renoult J.P., Kjellberg F., Grout C., Santoni S., Khadari B. (2009). Cyto-nuclear discordance in the phylogeny of Ficus section Galoglychia and host shifts in plant-pollinator associations. BMC Evolutionary Biology, 9, 248.

Born C., Kjellberg F., Chevallier M.-H., Vignes H., Dikangadissi J.-T., Sanguie, J., Wickings E.J., Hossaert-McKey M. (2008). Colonization processes and the maintenance of genetic diversity: insights from a pioneer rainforest tree, Aucoumea klaineana. Proceedings of the Royal Society B-Biological Sciences, 275, 2171-2179.

Khadari B., Roger J.P., Ater M., Achtak H., Oukabli A., Kjellberg F. (2008). Moroccan Fig presents specific genetic resources: a high potential of local selection. Proceedings of the Third International Symposium on Fig. Acta Horticulturae, 798, 33-37.

Kjellberg F. (2008). Coévolution et spéciation : le cas des chalcidiens associés aux figues. In Peut-on classer le vivant ? Linnée et la systématique aujourd'hui, D. Prat, A. Raynal-Roques, A. Roguenant (Édit.) Éditions Belin, Paris, pp 253-262.

Léotard G., Saltmarsh A., Kjellberg F., McKey D. (2008). Mutualism, hybrid inviability and speciation in a tropical ant– plant. Journal of Evolutionary Biology, 21, 1133-1143.

Schatz B., Kjellberg F., Shaman N., Hossaert-McKey M. (2008). Fig wasps: a staple food for ants on Ficus. Biotropica, 40, 190-195.

Dalecky A., Debout G., Estoup A., Mckey D.B., Kjellberg F. (2007). Changes in mating system and social structure of the ant Petalomyrmex phylax are associated with range expansion in Cameroon. Evolution, 61, 579-595.

Dalecky A., Renucci M., Tirard A., Debout G., Roux M., Kjellberg F., Provost E. (2007). Changes in composition of cuticular biochemicals of the facultatively polygynous ant Petalomyrmex phylax during range expansion in Cameroon with respect to social, spatial and genetic variation. Molecular Ecology, 16, 3778-3791.

Lourmas M., Kjellberg F., Dessard H., Joly H.I., Chevallier M.-H. (2007). Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum. Heredity, 99, 151–160.

Léotard G., Defossez E., Debain C., McKey D., Kjellberg F., Blatrix R. (2007). Local genetic co-structuring of the ant Petalomyrmex phylax and its host plant Leonardoxa a. africana: no role for a sixty meter wide river in separating social forms. Sociobiology, 51, 363-371.

Munoz F., Cheptou O., Kjellberg F. (2007). Spectral analysis of simulated species distribution maps provides insights into metapopulation dynamics. Ecological modelling, 205, 314-322.

Pereira R.A.S., Teixeira S., Kjellberg F. (2007). An inquiline fig-wasp using seeds as a resource for small male production: a potential first step for the evolution of new feeding habits? Biological Journal of the Linnean Society, 92, 9-17.

Vignes H., Hossaert-McKey M., Beaune D., Fèvre D., Anstett M.-C., Borges R.M., Kjellberg F., Chevallier M.-H. (2006). Development and characterization of microsatellite markers for a monoecious Ficus species, Ficus insipida, and crossspecies amplification among different sections of Ficus. Molecular Ecology Notes, 6, 792–795.

Dalecky A., Gaume L., Schatz B., McKey D., Kjellberg F. (2005). Facultative polygyny in the plant-ant Petalomyrmex phylax (Hymenoptera: Formicinae): sociogenetic and ecological determinants of queen number. Biological Journal of the Linnean Society, 86, 133-151.

Khadari B., Grout C., Santoni S., Hochu I., Roger J.-P., Ater M., Aksoy U., Kjellberg F. (2005). Etude préliminaire des origines de Ficus carica L. et de sa domestication Les Actes du BRG, 5, 53-65.

Khadari B., Grout C., Santoni S., Kjellberg F. (2005). Contrasting genetic diversity and differentiation among Mediterranean populations of Ficus carica L.: a study using mtDNA RFLP. Genetic resources and crop evolution, 52, 97-109.

Khadari B., Oukabli A., Ater M., Mamouni A., Roger J. P., Kjellberg F. (2005). Molecular characterization of Moroccan fig germplsam using intersimple sequence repeat and simple sequence repeat markers to establish a reference collection. Hortscience, 40, 29-32.

Kjellberg F., Bronstein J.L., van Ginkel G., Greeff J.M., Moore J.C., Bossu-Dupriez N., Chevolot M., Michaloud G. (2005). Clutch size: a major sex ratio determinant in fig pollinating wasps? C. R. Biologie, 328, 471-476.

Kjellberg F., Jousselin E., Hossaert-McKey M., Rasplus J.-Y. (2005). Biology, ecology and evolution of fig-pollinating wasps (Chalcidoidea, Agaonidae). In Biology, Ecology, and Evolution of Gall-inducing Arthropods, A. Raman, C. W. Schaefer & T.M. Withers eds. Science publishers, Inc., Enfield (NH) USA, Plymouth, UK, pp 539-572.

Ungricht S., Rasplus J.Y., Kjellberg F. (2005). Extinction threat evaluation of endemic fig trees of New Caledonia: priority assessment for taxonomy and conservation with herbarium collections. Biodiversity and Conservation, 14, 205-232.

Jousselin E., Kjellberg F., Herre, E.A. (2004). Flower specialization in a passively pollinated monoecious fig: a question of style and stigma? International Journal of Plant Sciences, 165, 587-593.

Ungricht S., Rasplus J.Y., Kjellberg F. (2004). Proposals to conserve names of extant fig trees against senior homonyms of fossils: Ficus crassipes F. M. Bailey against F. crassipes (Heer) Heer, Ficus tiliifolia Baker against F. tiliifolia (A. Braun) Heer and Ficus tremula Warb. against F. tremula Heer (Moraceae). Taxon, 53, 566-568.

Greeff, J.M., van Noort, S., Rasplus J.-Y. , Kjellberg F. (2003). Dispersal and fighting in male pollinating fig wasps. C. R. Biologie, 326, 121-130.

Jousselin, E., Hossaert-McKey, M., Herre, E.A., Kjellberg F. (2003). Why do fig wasps actively pollinate monoecious figs? Oecologia, 134, 381-387.

Jousselin, E., Rasplus, J.-Y., Kjellberg, F. (2003). Convergence and coevolution in a mutualism: evidence from a molecuar phylogeny of Ficus. Evolution, 57, 1255-1269.

Khadari B., Hochu I., Bouzid L., Santoni S., Roger J.P., Kjellberg F. (2003). The use of microsatellite markers for identification and genetic diversity evaluation of the fig collection in CBNM Porquerolles. Acta Hort. ISHS, 605, 77-86.

Khadari B., Hochu I., Santoni S., Oukabli A., Ater M., Roger J.P., Kjellberg F. (2003). Which molecular markers are best suited to identify fig cultivars: a comparison of RAPD, ISSR and microsatellite markers. Acta Hort. ISHS, 605, 69-75.

Oukabli A., Mamouni A., Laghezali M., Khadari B., Roger J.P., Kjellberg F. (2003). Genetic variability in Moroccan fig cultivars (Ficus carica L.) based on morphological and pomological data. Acta Hort. ISHS, 605, 51-59.

Pereira R.A.S., Prado A.P., Kjellberg F. (2003). Gynandromorphism in pollinating fig wasps (hymenoptera: agaonidae). Entomological News, 114, 152-155.

Ungricht S., Rasplus J.-Y., Kjellberg F. (2003). Nomenclature of the endemic monoecious fig trees (Moraceae: Ficus L.) of New Caledonia and Vanuatu (Pacific Ocean). Taxon, 52, 319-325.

Grison-Pigé, L., Bessière, J.-M., Turlings, C.J., Kjellberg, F., Roy, J., Hossaert-McKey, M. (2001). Limited intersex mimicry of floral odour in Ficus carica. Functional Ecology, 15, 551-558.

Jousselin, E., Hossaert-McKey, M., Kjellberg F. (2001). Egg deposition patterns of fig pollinating wasps: implications for studies of the stability of the mutualism. Ecological Entomology, 26, 602-608.

Jousselin, E., Kjellberg, F. (2001). The functional implications of active and passive pollination in dioecious figs. Ecology letters, 4, 151-158.

Jousselin, E., Rasplus, J.-Y., Kjellberg F. (2001). Shift to mutualism in a parasitic lineage of the fig/fig wasp interaction. Oikos, 94, 287-294.

Khadari, B., Hochu, L., Santoni S., Kjellberg F. (2001). Identification and characterisation of microsatellite loci in the common fig (Ficus carica L.) and representative species of genus Ficus. Molecular Ecology Notes, Primer Notes, 1, 191-193.

Kjellberg, F., Jousselin, E., Bronstein, J.L., Patel, A., Yokoyama, J., Rasplus, J.-Y. (2001). Pollination mode in fig wasps: the predictive power of correlated traits. Proceeding of the Royal Society B, 268, 1113-1121.

Machado, C.A., Jousselin, E., Kjellberg, F., Compton, S.G. & Herre, E.A. (2001). Phylogenetic relationships, historical biogeography and character evolution of fig-pollinating wasps. Proceedings of the Royal Society B, 268, 685-694.

Ben Abderrazak S., Oury B., Lal A.A., Bosseno M.F., Force-Barge P., Dujardin J.P., Fandeur T., Molez J.F., Kjellberg F., Ayala F.J., Tibayrenc M. (1999). Population genetic analysis by multilocus enzyme electrophoresis and other molecular markers. Experimental Parasitology, 92, 232-238.

Gibernau M., Hossaert-McKey M., Frey, J., Kjellberg F. (1998). Are olfactory signals sufficient to attract fig pollinators ? Ecoscience, 5, 306-311.

Khadari B., Lauri P. E., Kjellberg F., Villemur P. (1998). Genetic resources in fig: developing a precocity index based on relative numbers of undelayed versus delayed figs. Acta Hort. ISHS, 480,103-108.

Valdeyron G., Gouyon P.H., Kjellberg F., Garrone B. (1998). Le figuier. Seconde édition, revue et corrigée - Les cahiers de Cuculles, 111 pp.

Anstett M.-C., Hossaert-McKey M., Kjellberg F. (1997). Figs and fig pollinators: evolutionary conflicts in a coevolved mutualism. Trends of Research in Ecology and Evolution, 12, 94-99.

Herre, E.A., West S.A., Cook J.M., Compton S.G., Kjellberg F. (1997). Fig wasps: pollinators and parasites, sex ratio adjustment and male polymorphism, population structure and its consequences. pp 226-239 in Mating systems in insects, Choe et Crespi (eds), Oxford University Press.

Anstett M.-C., Kjellberg F., Bronstein J.L. (1996). Waiting for wasps: consequences for the pollination dynamics of Ficus pertusa. Journal of Biogeography, 23, 459-466.

Borsa P., Kjellberg F. (1996). Experimental evidence for pseudo-arrhenotoky in Hypothenemus hampei (Coleoptera: Scolytidae). Heredity, 76, 130-135.

Borsa P., Kjellberg F. (1996). Secondary sex ratio adjustment in a pseudo-arrhenotokous insect, Hypothenemus hampei (Coleoptera, Scolytidae). Comptes Rendus de l'Académie des Sciences, Sciences de la vie/life sciences, 319, 1159-1166.

Gervet J., Anstett M.-C., Kjellberg F. (1996). Behavioural screening and the evolution of polygyny in paper-wasps. pp 202-217 in "Natural history and evolution of an animal society: the paper wasp case", S. Turillazzi et M. J. West-Eberhard (eds), Oxford University Press.

Gibernau M., Hossaert-McKey M., Anstett M.-C., Kjellberg F. (1996). Consequences of protecting flowers in a fig. A one way trip for pollinators. Journal of Biogeography, 23, 425-432.

Anstett M.-C., Michaloud G., Kjellberg F. (1995). Critical population size for the fig/wasp mutualism in a seasonal environment: effect and evolution of receptivity duration Oecologia, 103, 453-461.

Khadari B., Gibernau M., Anstett M.-C., Kjellberg F., Hossaert-McKey M. (1995). When figs wait for pollinators: the length of fig receptivity. American Journal of Botany, 82, 992-999.

Khadari B., Lasherme P., Kjellberg F. (1995). RAPD fingerprinting for identification and genetic characterization of fig (Ficus carica L.) genotypes. Journal of Genetics and Breeding, 49, 77-86.

Kjellberg F. (1995). Le bon sauvage ou le figuier de mon village. Fruits Oubliés, 1/95: 3.

Patel A., Anstett M.-C., Hossaert-McKey, Kjellberg F. (1995). Pollinators entering female dioecious figs: why commit suicide. Journal of Evolutionary Biology. 8, 301-313.

Kjellberg F., Anstett M.C., Herre E.A. (1994). Yucca sex. Nature (scientific correspondence), 370, 604.

Kjellberg F. (1991). Le mutualisme Ficus-pollinisateurs et la biologie évolutive. Mémoire d'habilitation à diriger des recherches, Université de Montpellier II, Montpellier, 22 pp.

Rousset F., Raymond M., Kjellberg F. (1991). Cytoplasmic incompatibilities in the mosquito Culex pipiens: how to explain a cytotype polymorphism? Journal of Evolutionary Biology, 4, 69-81.

Tibayrenc M., Kjellberg F., Arnaud J., Oury B., Brenière S.F., Darde M.L., Ayala F.J. (1991). Are eucaryotic microorganisms clonal or sexual? A population genetics vantage. Proceedings of the National Academy of Sciences, USA, 88, 5129-5133.

Tibayrenc M., Kjellberg F., Ayala F.J. (1991). Clonal defense. Nature (scientific correspondence), 350, 385-386.

Tibayrenc M., Kjellberg F., Ayala F.J. (1991). The clonal theory of parasitic protozoa: a taxonomic proposal applicable to other clonal organisms. BioScience 41, :767-774.

Addicot J.F., Bronstein J., Kjellberg F. (1990). Evolution of mutualistic life-cycles: Yucca moths and fig wasps. pp 143-161, in Insect life cycles: genetics, evolution and co-ordination, F. Gilbert ed. Springer Verlag.

Bronstein J., Gouyon P.-H., Gliddon C., Kjellberg F., Michaloud G. (1990). The ecological consequences of flowering asynchrony in monoecious figs. A simulation study. Ecology, 71, 2145-2156.

Couvet D., Atlan A., Belhassen E., Gliddon C., Gouyon P.-H., Kjellberg F. (1990). Coevolution between two symbionts: the case of cytoplasmic male-sterility in higher plants. Oxford Surveys in Evolutionary Biology, 6, 225-249.Biology, 6:225-249.

Kjellberg F., Valdeyron G. (1990). Species-specific pollination: a help or a limit to range extention? pp 371-378, in Biological invasions in Europe and the mediterranean basin, F. di Castri et A.J. Hansen eds. Dr W Junk publishers.

Tibayrenc M., Kjellberg F., Ayala F.J. (1990). A clonal theory of parasitic protozoa: the population structure of Entamoeba, Giardia, Leshmania, Naegleria, Plasmodium, Trichomonas and Trypanosoma. Medical and taxonomical consequences. Proceedings of the National Academy of Sciences, USA, 87:2414-2418.

Kjellberg F., Maurice S. (1989). Seasonality in the reproductive phenology of Ficus: Its evolution and consequences. Experientia, 45, 653-660.

Kjellberg F., Doumesche B., Bronstein J.L. (1988). Longevity of a fig wasp (Blastophaga psenes). Proceeding of the Koninklijke Nederlandse Akademie van Wetenschappen (C), 91, 117-122.

Kjellberg F., Gouyon P.H., Ibrahim M., Raymond M., Valdeyron G. (1987). The stability of the symbiosis between dioecious figs and their pollinators : a study of Ficus carica L. Evolution, 41, 693-704.

Kjellberg F., Michaloud G., Valdeyron G. (1987). The Ficus Ficus-pollinator mutualism : how can it be evolutionarily stable ? pp 335-340, in Insects-Plants 86, V. Labeyrie, G. Fabre et D. Lachaise (eds), Dr. W. Junk publishers.

Valdeyron G., Gouyon P.H., Kjellberg F. (1987). Le figuier. Les cahiers de Cuculles n°2, vol. 1 77 pp.

Valdeyron G., Gouyon P.H., Kjellberg F. (1987). Le figuier. Les cahiers de Cuculles n°2, vol. 2 79-150.

Valizadeh M., Valdeyron G., Kjellberg F., Ibrahim M. (1987). Flux génétique chez le figuier, Ficus carica : dispersion par le pollen dans un peuplement dense. Acta Oecologica/Oecologia Plantarum, 8, 143-154.

Couvet D., Gouyon P.H., Kjellberg F., Olivieri I., Pomente D., Valdeyron G. (1985). De la métapopulation au voisinage : la génétique des populations en déséquilibre.  Génétique Sélection Evolution, 17, 407-414.

Couvet D., Gouyon P.H., Kjellberg F., Valdeyron G. (1985). La différenciation nucléocytoplasmique entre populations de Thym. Comptes Rendus de l'Académie des Sciences Ser. III, 300, 605-668.

Valdeyron G., Kjellberg F., Ibrahim M., Raymond M., Valizadeh M. (1985). A one species - one population plant : how does the common fig escape genetic diversification? pp 383-393, in Genetic differentiation and dispersal in plants, P. Jacquard et al. (eds), NATO ASI Series, Vol G5, Springer Verlag, Berlin.

Kjellberg F., Valdeyron G. (1984). The pollination of the fig tree and its control in horticulture. Acta Oecologica/Oecologia Generalis, 5, 407-412.

Kjellberg F. (1983). La stratégie reproductive du figuier (Ficus carica L.) et de son pollinisateur (Blastophaga psenes L.) un exemple de coévolution. Thèse de Docteur Ingénieur INAPG, Paris, 78 pp.

Kjellberg F., Aljibouri A., Valdeyron G. (1983). Observations récentes sur la pollinisation du figuier. Fruit, 38, 567-569.